JJG780-1992交流数字功率
表
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(译文)
JJG 780-1992交流数字功率表检定规程
Verification Regulation of AC Digital Power Meter
本检定规程经国家技术监督局于1992年2月15日批准，并自1993年1月
1日起施行。
This regulation is ratified by the State Bureau of Technical Supervision on February 15, 1992 and is put into practice as of January 1st, 1993.
归口单位:航空航天部三O四研究所
Specified Administrative Authority: 304 Research Institution of Ministry of Aerospace
起草单位:中国计量科学研究院
航空航天部三O四研究所
Drafting Institution: National Institute of Metrology P.R. China
304 Research Institution of Ministry of Aerospace
1
本规程技术条文由起草单位负责解释。
The drafting institution is responsible for the interpretation of this
regulation.
本规程主要起草人:
钱钟泰(中国计量科学研究院)
许秀叶〔中国计量科学研究院)
王积海〔航空航天部三O四所)
Chief Draftsmen of the Regulation:
Qian Zhongtai (National Institute of Metrology P.R. China) Xu XiuYe (National Institute of Metrology P.R. China) Wang Jihai (304 Research Institution of Ministry of Aerospace)
参加起草人:
肖宋修(航空航天部十区域计量站)
Participating Draftsmen:
Xiao Songxiu (Ten Region Metering Station of Ministry of Aerospace) 2
目录
Table of Contents 一概述????????????????????????????????740 I. Overview
二技术要求??????????????????????????????741 II. Technical Requirements
三检定条件??????????????????????????????742 III. Verification Conditions
四检定项目??????????????????????????????745 IV. Verification Items
五检定
方法
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??????????????????????????????746 V. Verification Methods
(一)外观检查?????????????????????????????746 A. Appearance Verification
(二)单相数字功率表基本误差的检定方法?????????? ?????746 B. Verification Methods for Basic Errors of Single Phase Digital Power Meter (三)三相数字功率表基本误差的检定方法???????????? ???748 C. Verification Methods for Basic Errors of Three Phase Digital Power Meter
(四)其他项目的检定方法??????????????????? ???751 D. Verification Methods for Other Items 六检定结果的处理???????????????????????????752 VI. Verification Results Processing 七检定周期??????????????????????????????754 VII. Verification Period
附录t原始记录格式??????????????????????????755 Appendix 1 Original Record Format
附录2单相数字功率表的部件检定方法??????????????????755 Appendix 2 Verification Methods for Parts of Single Phase Digital Power Meter
3
交流数字功率表检定规程
Verification Regulation of AC Digital Power Meter
本规程适用于新生产、使用中和修理后的用于测量交流有功功率的单
相或三相数字显示的功率表，以及与直流数字电压表配用的交流功率变换
4器。被测有功功率的交流电压、电流的频率范围为40-10Hz，被检表的引
-4-4用误差允许值不小于2×10(包括2×10)。
This regulation applies to single phase or three phase digital display power meters which are
newly manufactured, or in use or after repair, and AC power inverters matched with DC digital
voltmeters. The frequency range of the metered alternating voltage and current of active power is 4-40-10Hz. Permissible values of fiducial errors of verified meters are not less than 2×104-4(Including 2×10).
一概述
I. Overview
1交流数字功率表〔以下简称功率表)的被测量是交流有功功率，输人量是
被测功率的电压和电流，它一般采用图1的测量框图。
1. The metered amount of the AC digital power meter (hereinafter referred to as power meter) is
AC active power, the input amount is the voltage and the current of metered power, and a metering block diagram of Figure 1 is generally adopted.
被测功交流电率的交压或电
流电压 量限转 流 直 换器 流 电 乘压 直流数字法电压表被测功交流电器 (显示值率的交压或电
为Px或流电流 流 量限转PU) 换器
交流功率变换器
示值 Px=KpnUp 交流数字功率表
图1 交流数字功率表的测量框图
4
AC voltage AC of the voltage metered or power Quantity current DC limit Voltage converter MultiDC digital -plier voltmeterAC AC (Indication current voltage or value is Px of the current orPU) metered Metering
power limit
converter
AC power converter
Indication value Px=KpnUp AC digital power meter
Figure 1 Metering block diagram of AC digital power meter
被测功率的交流电压U和电流Ix输人后，分别由各自的量限转换器X
变成单量限的电压或电流X及X:〔通常同为电压或同为电流)。X和X;UIUI输人乘法器，变换成和被测有功功率( Px = UIxcosφ)正比的直流电压X
Ux，再由直流数字电压表测定，直流数字电压表通常直接给出被测功率的示值Px。
After being input, the AC voltage U and current Iof the metered power are respectively xx
changed into voltage X and current X(Generally are both voltage or both current) of single uI
metering limit by respective metering limit inverter. The X and Xare input into a multiplier to be uI
inverted into DC voltage U which is in direct ratio with the metered active power (P=UI), xxxxcosφand is then metered by a DC digital voltmeter. The voltmeter generally shows the indication value
Pof the metered power directly. x
当数字电压表是外附通用型时，将被测功率转换成直流电压U=的测量部件称为交流功率变换器。这时数字电压表给出的是电压示值UP。功率的侧量结果P可表示为: X
Px=Kpn-U (1) P
式中Kpn------功率变换器的标称变换系数。
When the digital voltmeter is of attachment general type, the metering part for inverting the
metered power to the DC voltage U is the AC power inverter, and the digital voltmeter indicates x
the voltage indication value U. The metering result P of the power can be expressed as: pux
P=K-U (1) xpnP
In the formula, K is the nominal transformation ratio of the power inverter. pn
5
数字功率表或功率变换器可以带有供遥测或遥控用的频率脉冲或数码
脉冲输出端。
The digital power meter or power inverter can be provided with a frequency pulse or digital pulse output end for telemetering or remote control.
数字功率表还可带有测定与被测功率有关的其他参数(如电压、电流、
功率因素和频率等)的测量部分，它们的检定应按有关的规程进行。本规程
不包括与检定这些部分有关的
内容
财务内部控制制度的内容财务内部控制制度的内容人员招聘与配置的内容项目成本控制的内容消防安全演练内容
。
The digital power meter can also be provided with metering parts for metering other parameters (such as voltage, current, power factors, frequency, and the like) related to the powered power. The verification is carried out according to the corresponding regulation. This regulation does not involve contents relevant to this part.
2 数字功率表可以是单相的，也可是多相的，本规程仅考虑多相中的三
相这一种情况。三相数字功率表可以用两至三个单相功率测量单元组成。
三相功率的侧量结果为各功率测量单元测量结果之和。其求和方法，可以
通过直流电压相加的方法进行，也可以通过对直流数字电压表数码进行运
算的方法实现。
2. The digital power meter can be in single phase or multiple phases. This regulation only takes three phases in multiple phases into consideration. The three phase digital power meter can be composed of two to three single power metering units. Metering results of three phase power are the sum of metering results of all power metering units. The summation can be in the method of adding DC voltage, or can be realized by calculating digits of the DC digital voltmeter.
有两个或三个功率测量单元连接成三相数字功率表的线路和用一般单
相功率表连接成三相功率表的线路完全相同。
The circuit of the three phase power meter connected by two or three power metering units is totally the same with the circuit of the three phase power meter connected by a general single phase power meter.
图2是用两个单相功率表组成测量三相三线制功率的线路。三相功率
的测量结果为两表测量结果之和。图2中的相序允许任意改变，而不致影
响测量结果的准确性
Figure 2 is the circuit for metering three-phase three-wire system power composed by two single phase power meters. The three phase power metering results are the summation of the metering results of the two meters. The phase sequence in Figure 2 can be changed at random without influence on the accuracy of the metering results.
图3是用三个单相功率表组成测量屯相四线制功率表的线路.士相功率
的侧量结吴去三表测量结果之和。
Figure 3 is the circuit for metering a three-phase four-wire system power meter composed of three single phase power meters. The three phase metering results are the summation of the metering results of three meters.
6
用于图2和图3的各单相功率表之间的相互影响与三相表允许误差相
比应该能够忽略，此外，各单相功率表的引出端和地电位间在电气上应该
是绝缘的。
Compared with the permissible errors of the three phase meters, interrelationship among all single phase power meters for Figure 2 and Figure 3 can be ignored. Moreover, leading-out terminals of each single phase power meter and ground potential should be electrically insulated.
图2 用两表法测量三相三线制 图3用三表法测量三相四线制
功率的框图 功率的框图
Figure 3 Block diagram for metering Figure 2 Block diagram for metering
three-phase four-wire power in the three-phase three-wire power in the method of three meters method of two meters
二技术要求
II. Technical Requirements
3 数字功率表或功率变换器必须有难于更换的型号及出厂编号的标志。
各引出端的标志应该清晰。电压回路和电流回路公共端应采用相同的标志
(如*或土)。
3. The digital power meter or the power inverter must have marks of types and manufacturing numbers which cannot be changed easily. The mark of each leading-out terminal must be clear. The common terminals of voltage loop circuits and current loop circuits should adopt the same mark (Such as * or ?).
数字功率表的其他标志应符合其技术条件的规定。当对有关标志的要
求有国家
标准
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或行业标准时，数字功率表技术条件中有关标志的技术要求
应该符合这些标准的规定。
Other marks of the digital power meter should accord with the regulation of the technical requirements. If there are national standards or industrial standards for relevant marks, the 7
technical requirements relevant to the marks of the digital power meter should accord with the regulation of the standards.
4数字功率表的电压、电流量限，功率因数范围及频率范围。
4. Voltage and current metering limit of digital power meter, power factor range and frequency range
4.1数字功率表的电压量限应优先在下列系列中选择:
15V, 30V, 75 (60) V, 100V, 150V, 200V, 300V, 400V, 450V, 600V。
4.1 Voltage metering limit of digital power meter should be selected from the following series in priority:
15V, 30V, 75 (60) V, 100V, 150V, 200V, 300V, 400V, 450V, 600V.
4.2数字功率表的电流量限应该优先在下列系列中选择:
O.lA, 0.25 (0.2) A, O.5A, 1A, 2.5 (2) A, 5A, 10A, 20A。
4.2. Current metering limit of digital power meter should be selected from the following series in priority:
0.1 A, 0.25 (0.2) A, O.5 A, 1A, 2.5 (2) A, 5A, 10A, 20A.
4.3数字功率表的功率因数范围应该优先在下列系列中选择:
0一士1, 0--1, 0.5--1, 0-0.2, 0-0.1, 0--0.050
4.3 Power factor range of digital power meter should be selected from the following series in priority:
0一士1, 0--1, 0.5--1, 0-0.2, 0-0.1, 0--0.050
当被测功率的功率因数在上述范围内时，数字功率表的准确度应符合
技术条件的全部要求。
When the power factor of the metered power is in the above range, the accuracy of the digital power meter should accord with all requirements of the technical requirements.
在上述系列中，功率因数范围为0-1的功率表称为全功率因数功率
表。功率因数范围为0--0.2, 0--0.1，0--0.05的功率表称为低功率因数
功率表。
In the above series, the power meter whose power factor range is 0 to 1 is called all power factor power meter. The power meter whose power factor range is 0 to 0.2, or 0 to 0.1 or 0 to 0.05 is called low power factor power meter.
功率因数范围上限值的绝对值称为功率表的额定因数。
The absolute value of the upper limit of the power factor range is called the rating factor of the power meter.
4.4数字功率表的工作频率范围应该优先在下列系列中选择。
4.4 Working frequency range of digital power meter should be selected from the following series in priority.
8
45--65Hz, 40--400Hz, 40--1000Hz, 40--2000Hz, 40--5000Hz, 40--10000Hz} 其中，仅能在45-65Hz频率范围工作的功率表称为工频功率
表。
45--65Hz, 40--400Hz, 40--1000Hz, 40--2000Hz, 40--5000Hz, 40--10000Hz, wherein the power meter which can only work in the frequency range of 45 to 65 Hz is called working frequency power meter.
4.5数字功率表可以有几个不同的电压和电流量限，几个工作频率范围，
并具有不同的准确度要求。其中准确度最高的工作频率范围称为基本频率
范围，准确度最高的量限称为基本量限。
4.5 The digital power meter can have several different voltage and current metering limits, several working frequency ranges, and have different requirements for accuracy, wherein the working frequency range with the highest accuracy is called basic frequency range, and the metering limit with the highest accuracy is called basic metering limit.
交流数字功率表的基本频率范围通常为工频范围45 --65Hz。
The basic frequency range of the AC digital power meter is generally 45 to 65 Hz of working frequency range.
5准确度级别
5 Accuracy Level
5.1基本误差
5.1 Basic Error
在本规程中，数字功率表的误差以满量限额定功率的引用误差表示，
在功率表的技术条件中，对基本误差允许值应有明确规定，并在功率表的
使用说明中，引用其主要内容。
In this regulation, the errors of the digital power meter are indicated as the fiducial errors of all metering limit rating power. In the technical requirements of the power meter, the permissible values of the basic errors should be regulated explicitly, and the main contents should be introduced in the direction for use of the power meter.
多量限、宽频带、全功率因数的数字功率表对不同的频率范围，不同
的功率因数范围及不同的量限允许规定不同的准确度要求。必要时可将基
本误差允许值用这些参数的函数形式给出。
Different accuracy requirements are allowed to be regulated for the digital power meter with multiple metering limits, broadband and all power factors for different frequency ranges, different power factor ranges and different metering limits. The permissible values of the basic errors can be given in the function of these parameters for necessity.
数字功率表应该优先采用下列准确度级别:
0.02, 0.05, 0.1, 0.2, 0.50
The digital power meter should adopt the following accuracy levels in priority:
0.02, 0.05, 0.1, 0.2, 0.50
以%为单位的功率表基本频率范围与基本量限的基本误差允许值应等于
上述准确度级别代号。
9
The permissible values of the basic errors of basic frequency ranges and basic metering limits of the power meter with % as unit should be equal to the marks of the above accuracy levels.
5.2年稳定度和附加误差
5.2 Annual stability and additive error
在数字功率表技术条件中，对其示值的年稳定度和影响量允许变化范
围内的附加误差允许值，应有和其标准度级别相应的明确规定，并在功率
表的使用说明中列出其主要内容。
In the technical requirements of the digital power meter, there should be explicit regulation corresponding to the accuracy levels for the annual stability of indication values and permissible values of additive errors in the permissible change range of the influence quantity, and the main contents should be listed in the description for use of the power meter.
6各回路间的绝缘要求
6. Insulation requirements among all loops
当用于组成三相功率表的单相功率表〔或功率变换器)带有直流电压或
频率脉冲和数码脉冲的输出端时，这些输出端的低端在使用中应该处于地
电位，它们与功率表(或变压器)电压或电流回路间在电气上应该是绝缘
的，该绝缘应能承受电压量限的额定电压值。当功率表(或变换器)电压回
路和电流回路公共端(带*端)对输出端低端的电位差由零增大至电压量程的
额定电压时，功率表的示值变化应小于其基本误差的0.5倍。
When the single phase power meters for forming the three phase power meter are provided with the output ends with DC voltage or frequency pulse and digital pulse, the lower ends of these output ends should be in ground potential in use, and they should be electrically insulated with the voltage or current loops of the power meter (or transformer). The insulation should bear the rating voltage value of the voltage metering limit. When the potential difference between the common terminals (with *terminal) of the voltage loops and current loops of the power meter (or transformer) and the lower ends of the output ends increases from zero to the rating voltage of the voltage metering range, the change of the indication value of the power meter should be a half lower than the basic errors.
鉴于单相功率表用于实际测量线路连接如图4所示，,因此用于实际测
量的单相功率表亦应符合本款上述要求。
Since the connection of the single phase power meter for practical metering circuits is shown as Figure 4, the single phase power meter for practical metering should also accord with the above requirements of this section.
10
负
载
图4 单项功率表测量真负载功率的连接线图
L
o
a
d
Figure 4 Circuit connection figure for metering true load power by single phase power meter
当输出低端需和被侧电压回路一端连接时，被测电压回路端应该为非
公共端(不带，号的端)，而电流回路的公共端(带，端)与电压回路的公共
端(带*端)的电位应该一致。
When the lower end of the output end should be connected with one end of the voltage loop, the loop end of the metered voltage should be the uncommon terminal (without * terminal), while the potential of the common terminal (with * terminal) of the current loop should be in accordance with the potential of the common terminal (with * terminal) of the voltage loop.
7本规程对和准确度无关的被检功率表的技术要求不作限制，相应技术要
求应该由被检功率表的技术条件规定。当这些技术要求存在行业标准或国
家标准时，技术条件的规定应符合有关标准的规定。
7. This regulation has no limit for the technical requirements for the verified power meter irrelevant to accuracy. Corresponding technical requirements should be regulated by the technical conditions of the verified power meter. When there are industrial standards or national standards for the technical requirements, the regulation of the technical conditions should accord with the regulation of relevant standards.
三检定条件
III. Verification Conditions
11
8当功率变换器必须和指定的直流数字电压表配用，检定时应将功率变换
器和配用的数字功率表一起作为数字功率表进行检定。这样检定的功率变
换器在使用中不得更换配用的数字电压表，而配用的直流数字电压表的允
许误差值应小于被测电压允许误差的1/2倍。当功率变换器未指定配用的
数字电压表，则在检定时，其输出直流电压的侧量误差不应大于被测电压
允许误差的1/8倍。在使用中，测量变换器输出电压的测量误差不应大于
被侧电压允许误差的1/4倍。
8. When the power inverter must be matched with the designated DC digital voltmeter, both the power inverter and the matched digital power meter should be verified as the digital power meter during verification. The digital voltmeter matched with the power inverter such verified cannot be changed in use, while the permissible error of the matched DC digital voltmeter should be one half lower than the permissible error of the metered voltage. When the power inverter is not designated with the matched digital voltmeter, the metering error of the output DC voltage should not be one eighth larger than the permissible error of the metered voltage during verification. The metering error for metering the output voltage of the inverter should not be one fourth larger than the permissible error of the metered voltage in use.
9 不同准确度级别的数字功率表，其基本误差的检定条件如表1所示，当
数字功率表存在零位调节，电压平衡，电流平衡或自校功能时，应该按其
技术条件进行调节和自校后进行检定。
9. The verification conditions of the basic errors of the digital power meters with different accuracy levels are shown in Table 1. When the digital power meter has the functions of zero adjustment, voltage balance, current balance or automatic self-correction, the adjustment should be carried out according to the technical requirements, and the verification is carried out after self-correction.
表1数字功率表基本误差检定条件表
被检表准确度级别% 0.02 0.05 0.1 0.2 0.5
检定时测量被测功率的引用误差允许值 % 0.005 0.01 0.02 0.05 0.1
影响量 额定量 单位 允许偏离值
被检表使用供电电压 220 V ?10
条件
供电频率 50 HZ ?2
温度 20 ? ?1 ?2 ?2 ?2 ?5
相对湿度 55 % ?20
预热时间 由技术条件h 大小规定值
规定
被测功率表电压 电压量限额% ?2
有关参数 定值
电压、电流失真0 % <0.5% <1%
度
频率 变化范围上% ?2
限值或指定
值
功率因数 变化范围上/ 士(0.05COSφ+0.01)
12
限值零或指
定值
三相相电压、线0 % ?1
电压及电流的幅
值不对称度
各相相位差相对0 (。) ?2
差值
被检表连线 V ?12
V ?12
,:当用户提出要求时，可在此条件下进行检定。
Table 1 Table of Verification Conditions of Basic Errors of Digital Power Meter
Accuracy level of verified meter 0.02 0.05 0.1 0.2 0.5
Permissible value of fiducial error for % 0.005 0.01 0.02 0.05 0.1 metering metered power during verification
Rating Influence Quantity Unit Permissible Deviation Value Quantity
Power Supply 220 V ?10 Voltage
Power Supply 50 HZ ?2 Frequency Use Temperature 20 ? ?1 ?2 ?2 ?2 ?5 Conditions Relative of Verified 55 % ?20 Humidity Meter Regulated
by Preheating Time h Large and Small Regulated Value technical
conditions
Rating
Value of
Voltage Voltage % ?2
Metering
Limit
Distortion
Factor of 0 % <0.5% <1% Voltage and
Current
Upper
Limit Value
Parameters or
Relevant to Frequency Designated % ?2 Metered Value of
Power Change
Meter Range
Upper
Limit
Value, Zero
or Power Factor / 士(0.05COSφ+0.01) Designated
Value of
Change
Range
Amplitude
asymmetry of 0 % ?1
three-phase
13
phase voltage,
line voltage and
current
Relative
Difference of 0 (.) ?2 each phase
difference
Connection V ?12
of Metered V ?12 Meter
,:When users require，verification can be performed under the condition.
10检定时，标准装置在该示值的误差与被检示值允许误差相比，应小到可
以忽略(一般不大于此允许误差的1/4倍)。
10. During verification, compared with the permissible error of the verified indication value, the error of the indication value of the standard device should be as small as possible to be ignored. (Generally, it is not one fourth more than the permissible error).
11 检定时，被检表的环境相对湿度应在55士20%范围内变化;而被检表的
环境温度应为20?。根据用户特殊要求允许在23?下进行检定，环境温度
允许偏差，对0.02级被检表为士1?，对005，0.1及0.2级被检表为上
2?，对0.5级被检表为上5?。
11. During verification, the environment relative humidity of the verified meter should change in the range of 55+/-20%, while the environment temperature of the verified meter should be 20?.
Verification can be carried out at the temperature of 23? according to the special requirement of
users. Deviation is allowed to the environment temperature. For the verified meter of 0.02 grade, the deviation is +/-1?; for the verified meter of 0.05 grade, or 0.1 grade or 0.2 grade, the deviation is +/-2?; and for the verified meter of 0.5 grade, the deviation is +/-5?.
12检定时，所用交流功率电源的技术指标如下:
12 During verification, the technical data of the used AC power source is as follows:
12.1电源的输出功率为应能供给被检表在电压量限额定电压及电流量限额
定电流下所消耗的功率。
12.1 The output power of the power source should supply the power used under the rating voltage of the voltage metering limit and the rating current of the current metering limit.
12.2三分钟内电源输出的交流功率的最大相对变化值对0.02级被检表不
大于被检表基本允许误差值的1/4倍，对0.05级以下各被检表不大于被检
表基本误差允许值的10倍。
12.2 The largest relative change value of the AC power output by the power source in three minutes is not one fourth more than the basic permissible error of the verified meter of 0.02 grade, and is not 10 times more than the basic permissible error of the verified meter of 0.05 grade or lower.
12.3电源频率调节的误差不大于2%，每三分钟频率的最大相对变化不大于
士0.02%。
12.3 The error of the adjustment of power source frequency is not more than 2%. The largest relative change of the frequency in every three minutes is not more than +/-0.02%.
14
12.4电源电压或电流波形失真度，不大于0.5%。仅用于检定0.1级以下各
级数字功率表的电源电压或电流波形失真度允许扩大至1%。
12.4 The distortion degree of power source voltage or current waveform is not more than 0.5%. The distortion degree of power source voltage or current waveform for verifying the digital power meter of 0.1 grade or lower are allowed to be enlarged to 1%.
12.5电源电压与电流之间相位差应该能够在士900之间调节，其调节细度
应不小于0.0100
12.5 The phase difference between the power source voltage and the current should be adjusted 。 between +/-900, and the adjustment fineness should not less than 0.01.
12.6电源电压及电流应能够调节至被检功率相应的电压和电流，其功率调
节细度不应大于被检表的相应示值基本误差允许值的1/18倍。
12.6 The power source voltage and current should be adjusted to the corresponding voltage and current of the verified power, and the power adjustment fineness should not be one eighteenth more than the permissible basic error of corresponding indication value of the verified meter.
12.7电源的各电流回路间及与电源的各电压回路间，在电气上应该是绝缘
的，以使各电流与电压回路间能作任意的电气连接。
12.7 All of the current loops of the power source and all of the voltage loops of the power source should be electrically insulated so that any electrical connection can be made among the current and the voltage loops.
12.8三相线电压的幅值不对称度不应大于11%，在三相四线制时，三相相
电压的幅值不对称度亦不应超过士1%。
12.8 The amplitude asymmetry of three phase line voltage should not be more than 11%. The amplitude asymmetry of voltage in the three-phase four-wire system should not exceed +/-1%.
三相电流的幅值不对称度不应大于土1%。
The amplitude asymmetry of three phase current should not be more than +/-1%.
本规程用下式表示电压或电流的幅值的不对称度:
The amplitude asymmetry of the voltage or current is shown in the following formula in this regulation:
3
3,kXiX,1k,幅值不对称度=×100% 3
Xk,1k,
式中 Xi和Xk是i和k相的相电流与电压或线电压的幅值。
3
3,kXiX,1k,Amplitude asymmetry=*100% 3
Xk,1k,
In the formula, Xand X are the amplitudes of the phase current and voltage or line voltage of i i k
and k phases.
15
12.9三相电流对相应电压相移的相对差值不应大于士2。
12.9 The phase shifting relative difference value from the three current to the corresponding voltage should not be more than +/-2.
13给被检表供电的电网电压应符合下列条件:
13 The voltage of power grid for supplying electricity to the verified meter should accord with the following conditions:
频率50士211z
电压220士lOV
Frequency 50+/-211z
Voltage 220+/-10V
14在检定基本误差前，应接被检技术条件进行预热，使示值达到稳定。
巧数字功率表的检定频率
14. Before the basic error is verified, preheating should be carried out according to the verified conditions to make the indication value be stable.
15 数字功率表的检定频率
15. Verification frequency of digital power meter
15.1数字功率表基本误差允许在45--65Hz范围内的任一频率下进行检
定。
15.1 The basic error of the digital power meter is allowed to be verified under any frequency in the range from 45 to 65 Hz.
根据用户要求，可以在用户指定的频率下进行检定。
According to the requirements of users, verification can be carried out under the frequency designated by users.
15.2为了确定数字表的频率响应，对各扩展的频率范围，应在其频率范围
上限频率下进行检定。
15.2 In order to determine the frequency response of the digital meter, for every expanded frequency range, the verification should be carried out under the upper limit frequency in the frequency range.
如果数字功率表存在几个扩展频率范围，对其最高频范围，为确定频
率响应，除在上限频率下进行检定外，必要时，应该增加在0.7倍上限频
率下的检定。
If there are several expanded frequency ranges of the digital power meters, as for the highest frequency range, the verification should be carried out under the frequency seven tenth of the upper limit frequency for necessity except verifying under the upper limit frequency.
15.3检定被检表的基本误差时，频率的调定误差不应大于土2%。
15.3 The adjustment error of the frequency should not be more than +/-2% during verifying the basic error of the verified meter.
16
16对于功率因数变化范围为0.5--1的数字功率表，应在oosp=1及
oosp=0.5的感性和容性两种情况下进行检定。
16. For the digital power meter with 0.5 to 1 of the change range of the power factor, verification should be carried out under the condition of sensibility and capacity of cos φ=1 and cos φ=0.5.
对于低功率因数或全功率因数的数字功率表应在cosp=0及功率因数范
围上限值(包括感性和容性两种情况)下进行检定。
For the digital power meter of low power factor or all power factor, verification should be carried out under the condition of cos φ=0 and the upper limit value of the power factor range. (Two conditions of sensibility and capacity are involved).
根据用户要求，可以在指定的功率因数值下进行检定。
Verification can be carried out under designated power factor value according to the requirements of users.
检定时，功率因数的调定误差不应大于士((0.05cosp+ 0.01)
The adjustment error of the power factor should not be more than +/-(0.05|cosφ|+0.01).
17在检定数字功率表基本误差时，被检表的连接应尽量和其实际工作时的
连接相一致。即应保证:
17. When the basic error of the digital power meter is verified, the connection of the verified meter should be consistent with the connection during practical work, i.e., it should be guaranteed that:
17.1各电压和电流回路公共端之间的电位差应连接为零，该电位差的最大
允许值为士12V。
17.1 The potential difference among common terminals of all voltage and current loops should be connected as zero, and the largest permissible value of the potential difference is +/-12V.
17.2如果数字功率表(或功率变换器)存在输出端，在检定时，输出低端在
单相情况下和电压非公共端(不带，端)等电位，在三相情况下和三相的中
点或零线等电位。允许对等电位有士12V的偏离。
17.2 If the digital power meter (or power inverter) has an output end, the lower output end is in equal potential with the voltage uncommon terminal (without * terminal) under the condition of single phase, and is in equal potential with the midpoint of the three phases or zero line under the condition of three phases. Deviation of +/- 12 V is allowed for the equal potential.
对于仅用于检定的标准数字功率表，可以不遵照上述规定连接，而在
使用时的实际连接下进行检定。
For the standard digital power meter only for verification, connection can be carried out without complying with the above regulation, while verification can be carried out under practical connection in use.
四检定项目
IV. Verification Items
18数字功率表的周期检定应包括下列内容:
18. The periodic verification of the digital power meter should involve the following contents:
18.1在15条规定的频率，第16条规定的功率因数值及第17条规定的连
接状态下，被检表各量限基本误差的检定。
17
18.1 Verification of basic errors of each metering limit of the verified meter under the frequency regulated in Section 15, power factor value regulated in Section 16 and connection conditions regulated in Section 17.
18.2.1数字功率表(或变换器)的基本量限在感性额定功率因数值下基本误
差的检定，应该在45-65Hz间任一频率(或用户指定的频率)下进行，检定
的示值应该不少于5个，这些示值是在量限的额定电压及感性额定功率因
数条件下，用改变电流示值方法达到，各示值应该是等距的，包括零示值
及满刻度示值。
18.2.1 The verification of basic errors of basic metering limit of the digital power meter (or inverter) under sensible rating power factor value should be carried out at any frequency (or frequency designated by users) between 45 to 65 Hz, and the indication values for verification should not be less than 5. These indication values are achieved by changing current indication values under the condition of rating voltage and sensible rating power factor of the metering limit. All of the indication values are equidistant, including zero indication value and indication value of full scale.
18.2.2数字功率表(或变换器)的基本量限的容性额定功率值，容性及感性
cosp=0(或cosp = 0. 5 )的基本误差，应该在18.2.1相同的频率、额定
电压和额定电流的条件下进行检定。
18.2.2 The capacitive rating power value of the basic metering limit of the digital power meter (or inverter), basic errors of cosφ=0(or cosφ=0.5) of the sensibility and capacity should be verified under the condition of the same frequency, rating voltage and rating current as 18.2.1.
18.2.3对多量限的数字功率表(或变换器)，允许根据实际使用需要，仅检
定部分量限的基本误差，在部分检定合格后，允许在功率表(或变换器)及
在这些经检定合格的量限范围内使用。
18.2.3 For the digital power meter (or inverter) with multiple metering limits, basic errors of only parts of metering limits are allowed to be verified according to practical use needs. After these parts are qualified by verification, the power meter (or inverter) can be used in the range of the qualified metering limit.
部分检定的功率表(或变换器)，应盖有限制使用的专用章。
The power meter (or inverter) with partial verification should be stamped with special seal of limited use.
在固定频率下使用的数字功率表(或变换器)，可以在使用频率下进行
检定。
The digital power meter (or inverter) used at fixed frequency can be verified at the use frequency.
18.2.4电流非基本量限只和电压基本量限配合检定。
18.2.4 Nonbasic metering limit of current is only verified by matching with basic metering limit of voltage.
电压非基本量限只和电流基本量限配合检定。
Nonbasic metering limit of voltage is only verified by matching with the basic metering limit of current.
18
根据用户要求，可以在电压量限和电流量限某些指定组合的情况下进
行检定。
According to the requirements of users, verification can be carried out under the condition of some designated combination of metering limit of voltage and metering limit of current.
所有非基本量限的基本误差，仅在量限额定电压及量限额定电流下进
行检定。检定时频率同18.2.1和18.2.2条的所用检定频率，而功率因数
值为零、额定功率因数及用户指定的功率因数值〔包括容性和感性两种情
况)。
Basic errors of all nonbasic metering limits are only verified under metering limit rating voltage and metering limit rating current. The frequency during verification is the same as the verification frequency used in Section 18.2.1 and 18.2.2, while the power factor value is zero, and the rating power factor and the power factor value are designated by users. (Two conditions of capacity and sensibility are involved.)
18.2.5当检定不能按17条的要求连接时，应该作相应的电位差影响的试
验，并用试验结果更正检定结果。
18.2.5 When connection cannot be carried out according to the requirements of Section 17 during verification, corresponding experiment of influence of electrical potential difference should be carried out, and verification results are corrected by results of experiment.
19新生产及修理后的数字功率表的首次检定，除按18条规定的有关内容
外应增加下列内容:
19. The initial verification for digital power meters which are newly manufactured and repaired should be added with the following contents except relevant contents regulated in Section 18.
19.1按技术条件规定进行耐压试验，绝缘电阻测量。
19.1Withstand voltage test and insulation resistance measurement should be carried out according to the technical conditions.
19.2数字功率表(或变换器)的频率响应检定内容和第18.2款的内容相
同，但检定频率为15.2款规定的频率，并且仅在量限的额定电压和额定电
流下进行检定。对宽频带的数字功率表(或变换器)，允许根据实际使用需
要，仅检定部分频率范围的频带影响。这样检定出的数字功率表(或变换
，只允许在检定合格的频带范围内工作，并在检定证书盖有限制使用频器)
率范围的专用章。
19.2 The verification contents of frequency response of digital power meter (or inverter) are the same as the contents of Section 18.2, but the verification frequency is the frequency regulated in Section 15.2, and the verification is only carried out under the rating voltage and the rating current in the metering limit. For the digital power meter (or inverter) with broadband, only parts of frequency band influence in frequency range are verified according to practical use needs. The digital power meter (or inverter) verified in such way is only allowed to work in the qualified frequency band range, and the verification certificate is stamped with the seal of limited use of frequency range.
19.3电流回路和电压回路同名端间，电位差影响的铡量。
19.3 Measurement of influence of electrical potential difference among terminals with the same name of current loops and voltage loops.
19
19.4如果数字功率表(或变换器)带有输出端，则应测量输人端与输出低端
电位差的影响。
19.4 If digital power meter (or inverter) has the output end, the influence of electrical potential difference between lower ends of input end and output end should be measured.
19.5三相功率表所属各单项功率单元之间相互影响的测量。
19.5 Measurement of mutual influence among single power units belonged to three phase power meters.
19.6根据技术条件的规定，测量主要影响量的附加误差系数〔如温度附加
误差等)。
19.6 According to the regulation of the technical conditions, coefficients of additive errors of main influence are measured. (Such as temperature additive errors, and the like)
五检定方法
V. Verification Methods
(一)外况检查
A. Outer Condition Verification
20外观检查
20. Appearance Verification
20.1检查被检表的标志是否符合本规程第3条的规定，不符合规定不予检
定。
20.1 Verify whether marks of the verified meter accord with Section 3 of this regulation, verification is not carried out for the unqualified meter.
20.2不通电情况下检查被检功率及其附件是否有严重影响准确度的缺损，
当存在这样缺损 不予检定。
20.2 Verify whether verified power and accessories have defect with severe influence on accuracy under the condition of no powering.
20.3通电检查数字功率表的线路是否能正常工作，如存在影响正常工作的
损坏(如线路短路或断路、绝缘部件的电气击穿、数码管损坏等)，不予检
定。
20.3 Verify whether lines of the digital power meter can work normally through powering, and verification is not carried out for the digital power meter with defect with severe influence on normal work.(Such as short-circuit or open circuit of lines, electrical breakdown of insulation parts, damage of digital tubes, and the like).
20.4外观不合格的数字功率表，将用检定结果通知书通知其不合格的原
因。
20.4 For digital power meter with unqualified appearance, reasons are noticed in verification result notices.
(二)单相数字功率表基本误差的检定方法
B. Verification Methods of Basic Errors of Single Phase Digital Power Meter
20
21单相数字功率表〔或变换器)，在表1(见9条)的检定条件下，按18.2
款规定的项目进行基本误差的检定。
21. Basic errors of the single phase digital power meter (or inverters) are verified according to items regulated in Section 18.2 under the verification conditions of Table 1 (See Section 9).
本规程建议优先采用标准功率源法及比较法对被检表进行检定。
In this regulation it is suggested that the verified meter is verified by a standard power source method and a comparison method in priority.
22用标准功率源法检定单相数字功率表。
22. Verification of digital power meter by standard power source method.
22.1标准功率源应满足第12条提出的对功率电源各种要求，其量限和频
率范围应该包括被检表的检定量限和频率范围。
22.1 Standard power source should meet all requirements for power supply suggested in Section 12, and the metering limits and frequency range should include the verification metering limits and frequency range of the verified meter.
标准功率源在连接被检表后，应仍能保证输出功率的准确度。
After the standard power source is connected with the verified meter, the accuracy of output power should be guaranteed.
标准功率源在开展检定的量限及频率范围内，应持有检定周期内的合
格证书，其输出功率的示值误差应不大于被检表相应示值允许误差的1/4
倍。
The standard power source should have qualification certificate in the verification period in the metering limits and frequency range of verification. The errors of indication values of the output power should not be one fourth more than the permissible errors of relevant indication values.
允许用输出功率示值误差不大于被检表相应示值允许误差的1/2倍的
标准功率源对被检表进行检定，但此时标准功率源的示值年不稳定度应不
大于被检表允许误差的1/4倍，并且要用示值尸，在检定周期内的检定证
书的数据加以修正。
The standard power source whose errors of indication values of the output power is not half more than the permissible errors of relevant indication values can be used for verifying the verified meter, but the annual instability of the indication values of the standard power source should not be one fourth more than the permissible errors of the verified meter. Moreover, data of the verification certificate should be corrected in the verification period by the indication values.
22.2用标准功率源法检定单相数字功率表的连接如图5所示。线路连接所
允许的检定误差应该小到可以忽略，一般不应大于被检表相应示值允许误
差的1/8倍，主要要求如下:
22.2 The connection of single phase digital power meter verified by the standard power source method is shown as Figure 5. Verification errors permitted by the line connection should be as small as possible until can be ignored, and generally they should not be one eighth more than the permissible errors of relevant indication values of the verified meter. The main requirements are as follows:
21
22.2.1被检定电压回路和电流回路的同名端应连接在一起。
22.2.1 Terminals with the same name of the verified voltage loops and the verified current loops should be connected together.
22.2.2如果被检表(或功率变换器)存在输出端，输出端的低端应和被测功
率电压的非同名端相接。
22.2.2 If the verified meter (or power inverter) has the output end, the lower end of the output end should be connected with the terminal with different name of verified power voltage.
22.2.3标准功率源，被检表(或被检变换器和直流数字电压表)的外壳应直
接相接，并和地电位相接，地电位一般应和被测功率的电压非同名端相
接。
22.2.3 The standard power source should be directly connected with the outer case of the verified meter (or verified inverter and DC digital voltage meter), and is connected with ground potential. Generally, the ground potential should be connected with the terminal with different name of the verified power voltage.
允许将地电位和被测功率的电压同名端相接，但此时被检表〔或变换
器)及直流数字电压表应该允许这样的连接，并改变连接引起的误差变化值
小于被检表允许误差的1/8倍。
The ground potential is allowed to be connected with the terminal with the same name of the verified power voltage, but at the moment the verified meter (or inverter) and the DC digital voltmeter allow such connection, and change values of errors caused by the change of connection is one eighth less than the permissible error of the verified meter.
22.2.4连接被检功率的电压和电流回路的引线回路面积应尽量减小，并尽
量减小两个回路出的数字功率表(或变换器)，只允许在检定合格的频带范
围内工作，并在检定证书盖有限制使用频率范围的专用章。
22.2.4 The area of conductor loops for connecting the voltage and current loops of the verified power should be as small as possible, and the digital power meter (or inverter)of the two loops is reduced to the greatest extend. The digital power meter is allowed to work only in the frequency range with qualified verification, and the verification certificate is stamped with a special seal of limited use of frequency range.
22.2.5 电流回路的来线和回路之间的漏电流应能忽略不计，必要时可采用
等电位屏蔽保护措施来减小这一漏电流。
22.2.5 Leakage current between arriving wires of the current loop and the loop can be ignored, and equal potential shielding protection can be adopted for necessity to reduce the leakage current.
22.2.6 电压回路引线压降的影响应该小到可以忽略。
22.2.6 The influence of voltage drop of lead wires from voltage loop should be as small as possible until to be ignored.
23.1检定用的单相交流功率电源应符合第12条提出的要求。
23.1 The single phase AC power source for verification should accord with requirements suggested by Section 12.
23.2用比较法检定单相功率表的线路，如图6所示。标准功率表和单相交
流功率电源如下连接，组成等效标准功率源:标准功率表的电压回路应连接
22
在交流功率源的电压输出端上，而标准功率表的电流回路串联连接在电流
电源输出端的非公共端上，这样组成的等效标准功率源的示值P，就是标S
准功率表的示值Po。的负值，即有:
23.2 Verify the circuit of single phase power meter by the comparison method, which is shown as Figure 6. The standard power meter is connected with single phase AC power source as follows to form an equivalent standard power source: voltage loop of the standard power meter should be connected with the voltage output end of AC power source, while current loop of the standard power meter is connected with the uncommon terminal of power output end of current in series. The indication value Pof equivalent standard power source formed in such way is the indication S
value P of the standard power meter, i.e.: o
P=-P (6) so
P=-P (6) so
如果需要改变标准功率表Po的正负号，允许将标准功率表的电流回路
两端对调，这时有:
P=P (7) S0
If the plus or minus sign of Pof the standard power meter needs to be changed, both ends of o
the current loop of the standard power meter are allowed to be exchanged. Here is a formula:
P=P (7) S0
直
标准功被流
率源检数
(示值功字
Ps) 率电
表 压
表
被检功率表Px=KpnUp
外壳
图6用标准功率源检定单相数字功率表的线路连接图
23
DC
Veri-Digital
Standard fied Volt-
Power SourcePower meter
Meter (Indication
Value P) s
Verified Power Meter Outer P=KU xpnpCase
Figure 6 Circuit connection figure for verifying single phase digital power meter by standard
power source
23.4用比较法检定所得的被检示值Px的误差?P二可用下式表示: 23.4 Error ?P of verified indication value P verified by the comparison method can be expressed x
by the following formula:
?P = P一P=P士P (8) xsxs
?P = P一P=P士P (8) xsxs
式中Po—被检表示值为Px时，标准表的示值。而正负号将根据式((6)(取正号)或式(7)(取负号)决定。
In the formula,P is the indication value of the standard meter when the indication value of the o
verified meter is P, while the plus or minus sign is decided by formula 6 (Taking plus sign) or x
formula 7 (Taking minus sign).
当被检表是功率变换器时，式(8)中的P二将由式(4)表示，式(4)的内容见22.4款。
When the verified meter is the power inverter, P in formula 8 is indicated by formula 4, and x
the contents of formula 4 is shown in Section 22.4.
24在不具备整体检定的条件，而被检表满足附录2的2.1款要求的条件时，允许采用附录2的部件检定法时对单相数字功率表(或变换器)进行检定。
24. When the total verification conditions are not realized, while the verified meter meets the
condition required by Section 2.1 of Appendix 2, the single phase digital power meter (or inverter)
can be verified by the verification method for parts in Appendix 2.
对具体型号单相数字功率表的部件检定方法，应经开展该项检定的单位所属技术管理部门审查和批准后实行。
24
The verification methods for parts of single phase digital power meters with definite types should be put into practice after being checked and approved by technical administration department to which units developing the verification belonged.
(三)三相数字功率表基本误差的检定方法
C. Verification methods for basic errors of three phase digital power meter
25三相数字功率表基本误差的检定方法在表1所示的条件下按18.2款规
定项目进行。本规程优先推荐标准功率源法和比较法两种三相功率表的检
定方法。
25. Verification methods for basic errors of three phase digital power meter are carried out by items prescribed by Section 18.2 under the conditions referred to Table 1. In this regulation, it is suggested two verification methods of standard power source method and comparison method for the three phase power meter in priority.
26用标准功率源法检定三相数字功率表。
26. Verify three phase digital power meter by standard power source method.
26.1用标准功率源法检定三相数字功率表的连接如图7所示。
26.1 The connection for verifying the three phase digital power meter by the standard power source method is shown as Figure 7.
在图中，标准三相功率源的电压输出端Uas, Ubs, Ucs,.和Os端分别
和被检表的相应端相接，标准源的电流源的同名端，Ias，Ibs,Ics和被检
表电流回路相应的同名端Iax，Ibx，Icx相接。标准源的非同名端
Ias,Ibs,Ics和被检表的Iax, Ibx,Icx人二端相接。标准源和被检表的外
壳相连并接地，而标准功率源的线一般接地。
In the figure, the voltage output ends U, U, U and the O end of the standard three phase asbscss
power source are connected with the corresponding end of the verified meter. The ends with the same name of the standard source I, I and I are connected the ends with the same name of the asbscs
current loops of the verified meter I, I and I. The ends with different name of the standard axbxcx
source I, I and Iare connected with the ends of I I and I of the verified meter. The asbscs axbxcx
standard source is connected with the outer case of the verified meter and is in ground connection, while wires of the standard power source are generally in ground connection.
在确定被检功率表电流回路所处电位的影响可以忽略后，允许Iax，
Ibx,Icx不和Uax， Ubx，Ucx中的相应端连接，而和0端相接。
If the influence of electrical potential where the current loops of the verified power meter located can be ignored, the ends of I, I and I are allowed to be not connected with axbxcx
corresponding ends of U,U and U, but connected with the O end. axbxcx
当被检表是三相三线制时，其表中无零线，被检表不和零线相接。
When the verified meter is in three-phase three-wire system, and there is no zero line in the meter, the verified meter is not connected with the zero line.
电压回路和电流回路引线的面积应尽量减小，其方法是用同轴线连接
回路或将回路连接线的来、回引线尽量绞合在一起，而各回路应尽量远离
以减小相互之间的藕合。
25
The area of lead wires of voltage loops and current loops should be as small as possible by the method of connecting the loops with coaxial lines or putting arriving and returning lead wires of connection wires of the loops into together, while the loop should be as far away as possible from each other to reduce mutual coupling.
各
部
件 外被 壳 检标标功准率准三表 三相相功示功率值率源 Px 源
图7 用标准功率源法检定三相数字功率表的连接图
26
Outer
Veri-Case fied of Power Each Stan- Meter Part dard
Three
Phase
Power
Source Indi-
cation
Value
Px
Figure 7 Connection figure for verifying three phase digital power meter by standard power source method
电流回路来、回线之间的漏电流应小到影响量可以忽略，在用减小引
线间导纳的措施无法达到此目的时，可采用等电位屏蔽保护措施。
The leakage current among arriving and returning wires of current loops should be as small as possible until to be ignored. If the purpose cannot be achieved by reducing conductors among leading wires, the measure of equal electrical potential shielding protection can be adopted.
26.2三相标准功率源除应满足22.1款对单相功率源提出的类似要求外还
应满足第12条对三相电源提出的各种要求(见12.8, 12.9款)。
26.2 The three phase standard power source should meet all requirements for three phase power source prescribed by Section 12 (See Section 12.8 and 12.9) besides meeting similar requirements for single phase power source prescribed by Section 22.1.
26.3被检表示值Px的误差&P二可用下式表示:
26.3 Error ?P of verified indication value P can be expressed by the following formula: x
ΔP=P-P (9) xxs
ΔP=P-P (9) xxs
式中Ps--被检表示值为Px时，标准三相功率源的示值。
In the formula, P is the indication value of the standard three phase power source when the s
indication value of the verified meter is P. x
27
当检定是三相功率变换器时，P二的表示式如式(4)所示，式(4)的内容见22.4款。
When the three phase power inverter is verified, the indication formula of P is shown as xFormula 4, and the contents of Formula 4 is referred to Section 22.4.
27用比较法检定三相数字功率表的线路如图8所示。
27. Circuits for verifying three phase digital power meter by comparison method is shown as
Figure 8.
等效三相功率源 各部件外壳
交
流标准被功率检三表 功相率表 功
率示示电值值
源 PP0 x
图8用比较法检定三相功率表的线路连接
28
Equivalent three Outer case of phase power source each part
Standard Veripower -fied AC meter po- three wer phase me-
ter power
source Indica- Indica- tion tion value value P0 Px
Figure 8. Circuit connection for verifying three phase power meter by comparison method
在图8中，交流三相功率电源和标准三相功率表组成等效的标准三项
功率源，其连接方法是将电源的电压端Ua，Ub,Uc，及0端和标准功率表
的相应端连接，组成等效标准功率源的电压回路相应端，而标准功率表的
电流回路同名端Iao，Ibo，Ico应和电源回路的非同名端1a Ib, Ic。相
接，由电源的电流同名端1as , Ibs, Ics组成等效标准功率源的电流同名
端。而标准表的电流非同名端Iao，Ibo Ico组成等效标准三相功率源的非
同名端Ias，Ibs，Ics这样连接的等效标准功率源的示值P:即为标准三相
功率表的示值Po的负值;
In figure 8, the AC three phase power meter and the standard three phase power meter form the equivalent standard three phase power source. The voltage ends U, U, Uand O ends of abc
power source are connected with corresponding ends of the standard power meter to form corresponding ends of voltage loops of the equivalent standard power source, while the ends with the same name I, I and I of current loops of the standard power meter should be connected aoboco
with ends with different names I, I and I of power source loops. The ends with the same name abc
I, I and I of current of the power source form the ends with the same name of current of the asbscs
equivalent standard power source. The ends I, I and I with different names of current of the aoboco
standard meter form the ends I, I and I with different names of equivalent standard three asbscs
phase power source. The indication value P of the equivalent standard power source connected in such way is the minus value of indication value P of the standard three phase power meter. o
PS=-Po (l0)
P=-P (10) So
可用同时对调标准功率表三相电流回路两端的方法，使下式成立:
29
Ps= PO (11)
The following formula can be set up by the method of exchanging both ends of three phase current loops of the standard three phase power meter simultaneously.
P= P (11) Os
图9用两个单相功率表组成三 图10用三个单相标准功率表组成
相三线制的三相标准功率表 三相四线制的标准三相功率表
Figure 9 Three-phase three-line system Figure 10 Three-phase four-line system standard three phase power standard three phase power meter
meter formed by two single phase formed by three single phase standard
power meters power meters
当被检表和标准表均为三相三线制时，则它们线路中均无零(0)端，这
时两表将不和电源零端相接。
When the verified meter and the standard meter are both in the three-phase three-line system, there is no zero (0)end in the circuits. Both of the meters cannot be connected with the zero end of the power source at the time.
等效标准功率源和被检表的连接应按26.1款的要求进行。用这样连接
成的等效标准功率源检定三相被检表的方法就是比较法。
The connection between the equivalent standard power source and the verified meter should be carried out according to Section 26.1.The method for verifying the three phase verified meter by the equivalent standard power source connected in such way is the comparison method.
27.2用比较法检定三相标准功率表应符合23.1款提出的对单相标准功率
表的类似要求，包括各电流回路的相互间，以及与电压回路间在电气上是
绝缘的，使得这些电流回路能够进行任意的电气连接。
30
27.2 Verifying three phase standard power meter by the comparison method should accord with requirements similar to these of single phase standard power meter prescribed by Section 23.1.All loops among current loops, and voltage loops are electrically insulated so that any electrical connection can be carried out in the current loops.
27.3可以用图9和图10的连接方法，将符合23.1款要求的两个或三个单
相标准功率表连接成三相标准数字功率表。这时三相表的示值Po为各单相
表示值的代数和。
27.3 Two or three single phase standard power meters according with the requirements of Section 23.1 can be connected into the three phase standard digital power meter according to the connection methods of Figure 9 and Figure 10. The indication value P of the three phase meter at o
the moment is the algebraic sum of indication values of all single phase meters.
27.4允许采用电压互感器和电流互感器扩展标准表的量限，互感器变比允
许的误差，一般应小于标准表允许误差的1/10027.5比较法所用的三相功
率电源应符合第12条的要求。
27.4 A voltage transformer and a current transformer are allowed to expand the metering limit of the standard meter. Permissible change errors of the transformer are generally 1/10027.5 less than permissible errors of the standard meter. The three phase power source used in the comparison method should accord with requirements of Section 12.
27.6用比较法检定所得的被检表示值Px的误差?Px用下式表示:
27.6 Error ?P of indication value Pof the verified meter obtained by the comparison method is xx
indicated by the following formula:
?Px = Px-Ps=Px?Po (12)
?P = P-P=P?P (12) xxsxo
式中po-被检表示值为p二时，标准表的示值。而正负号由采用式(10)(取
正号)或式(11)(取负号)的连接方式决定。
In the formula P is the indication value of the standard meter when the indication value of the o
verified meter is P, while the plus or minus sign is decided by the connection mode of formula x
(10)(Taking plus sign) or formula (11) (Taking minus).
当检定三相功率变换器时，式(12)中的Px将由式(4)表示，式(4)的内
容见22.4款。
When three phase power inverters are verified, P in the formula (12) is indicated by formula x
(4), and the contents of formula (4) is shown in Section 22.4.
28当各单相功率单元之间的相互影响可以忽略，并各单元按图9和图10
连接组成三相被检表时，允许采用单相数字功率表的检定方法检定被检表
的各单元，这时各单元的引用误差允许值将与三相表引用误差允许值相
等。
28. Mutual influences among single phase power units can be ignored. When the three phase verified meter is formed by the connecting the units according to Figure 9 and Figure 10, the verification method for verifying the single phase digital power meter is allowed to verify all units of the verified meter. Permissible values of fiducial errors of all units are equal to the permissible values of fiducial errors of the three phase meter.
(四)其他项目的检定方法
31
D. Verification Methods for Other Items
29检定数字功率表的频率响应时，其量限和功率因数值及检定条件除频率
外，都与检定数字功率表基本误差相应因素相同。而检定频率由15.2款规
定。频率影响仅在量限额定电压和额定电流所对应的示值下进行。当被检
表的误差值均不超过相应频率下的误差允许值时，认为被检表频率响应合
格。
29. When the frequency response of digital power meter is verified, the metering limit, power factor values and verification conditions are the same as corresponding factors for verifying basic errors of the digital power meter except frequency, while the verification frequency is regulated by Section 15.2. the influence of the frequency is only carried out under the indication value corresponding to the rating voltage and rating current of the metering limit. When the errors of the verified meter do not exceed the permissible values of errors under corresponding frequency, the frequency response of the verified meter is qualified.
30耐压和绝缘试验按被检表技术条件规定的试验方法进行，该试验方法应
符合有关国家标准和行业标准的规定。
30. Withstand voltage and insulation experiment is carried out according to the experiment methods prescribed in the technical conditions. The experiment methods should accord with relevant national standards and industrial standards.
31电流、电压回路同名端间电位差的影响，在各相电流为零，电压单元为
量限额定电压U。及功率表开展工作的最高频率下进行测量。应分别进行
测量。在上述条件下，先将该单元电流回路的同名端和该单元相应电压回
路同名端相接，被检功率表示值为?P。;再将该端和电压非同名端相接，
功率表的示值将变为?Pu;则该单元电流回路和电压回路间每伏电位差引起
附加误差系数?K,按下式计算:
31. The influence of potential difference among ends with the same name of current and voltage loops is measured under the conditions that current of each phase is zero, voltage unit is the rating voltage U of metering limit, and the frequency is the highest frequency of the power meter for developing work, and should be measured respectively. The ends with the same name of current loops of the unit are firstly connected with the ends with the same name of corresponding voltage loops of the unit, and the indication value of the verified meter is ?P. Then the ends with the
same name of current loops of the unit are connected with ends with different names of voltage, and the indication value of the power meter will become ?P. The additive error coefficient ?K u
caused by each volt of potential difference among current loops and voltage loops of the unit is calculated according to the following formula:
(13)
32输出端对输人端间电位的影响，在功率因数为1,额定电压v。和额定电
流t。及功率表工作的最高频率下进行测量。先将输出低端和电压回路非
同名端相接，功率表示值为Po,然后将输出低端接至电压回路同名端，功
率表示值变为Po，则输出低端电位的附加误差系数按下式计算:
32. The influence on electrical potential from the output end to the input end is measured under the conditions of power factor I, rating voltage v, rating current t and highest frequency during 32
work of the power meter. The output lower ends are connected with the ends with different names of voltage loops, and the indication value of the power meter is Po. The output lower ends are then connected with the ends with the same name of voltage loops, and the indication value of the power meter becomes Po. The additive error coefficient of the electrical potential of output lower ends is calculated by the following formula:
(14)
注意:仅在输出端和输人端电气上是绝缘时，才能进行此测量。
Note: Only when the output ends and the input ends are electrically insulated, the measurement can be carried out.
33影响量附加误差系数的测量
33. Measurement of additive error coefficient of influence amount
影响量的附加误差系数，一般在感性额定功率因数及基本量限额定电
压和额定电流及基本频率范围的额定频率下进行测量，其方法如下:
Additive error coefficient of influence amount is measured under sensible rating power factor, rating voltage and rating current of basic metering limit and rating frequency in basic frequency range, and the method is as follows:
33.1除被测的影响量外，其他影响量及被测功率应尽量稳定，由于它们在
测量过程变化而引起的附加误差变化值可以忽略不计。
33.1 Other influence amount and metered power except measured influence amount should be as stable as possible. The change value of additive error caused by the other influence amount and the metered power can be ignored.
33.2将被测附加误差系数的影响量。调到工作允许变化范围下限值aL，在
功率表示值稳定后读出被检表示值P (al)
33.2 The influence amount of metered additive error coefficient is adjusted to the lower limit value aL in work allowable change range, and the indication value of the verified meter P () is read out al
after the indication value of the power meter is stable.
33.3将被测附加误差系数的影响量调到工作允许变化范围的上限值ah，
在功率表示值稳定后读出被检表示值P (a)。 h
33.3 The influence amount of metered additive error coefficient is adjusted to the upper limit value ah in work allowable change range, and the indication value of the verified meter P () is ah
read out after the indication value of the power meter is stable.
33.4被测附加误差系数?K，将按下式表示:
33.4 The metered additive error coefficient ?K is expressed by the following formula:
六检定结果的处理
VI Verification Results Processing
33
34检定数据应该有原始记录，并保存两年以上。
34. Verification data should have original record, and should be kept for more than two years.
35被检表送检时，应附有上次周期检定以及生产或修理后，首次检定的检
定证书。
35. When the verified meter is sent to be verified, there should be the verification certificate for initial verification after the last periodic verification and repair.
36周期检定证书中，应该包括:基本频率范围检定频率下，检定所得各种
数据。这些数据将以额定功率为分母的引用修正值Y的形式给出，即按下
式表示:
36. The periodic verification certificate should include various kinds of data obtained from verification under the verification frequency in the basic frequency range. These data are given in the form of reference correction value Y with rating power as denominator, which is expressed as the following formula:
式中:ΔPx-----被检表示值Px的误差
Px-----被检表示值
Ps-----被检功率的约定真值，即标准功率源的示值或标准数字功
率表的示值P0
Un,In,cosφn-----被检表被检量限的额定电压，电流及功率因数。
In the formula, ΔP is the error of the indication value Pof the verified meter. xx
P is the indication value of the verified meter. x
P is the conventional true value of verified power, i.e., the indication value of s
standard power source or the indication value Po of standard digital power
meter.
U, I, and cosφ are the rating voltage, current and power factor of metering limit nn
of the verified meter.
36.1基本量限的检定数据
36.1 Verification data of basic metering limit
36.1.1在感性额定功率因数及额定电压下，给出不少于5个功率值Px的
示值修正值Yo (Px)。即表2，表3及表4中序号1栏的各数据。
36.1.1 At least five correction values Y (P) of the indication value of power value P are given oxx
under sensible rating power factor and rating voltage, i.e., all data in the first line of Table 2, Table
3 and Table 4.
36.1.2对功率因数范围为0.5--1的功率表，还应给出表2第2及第3栏
的感性cosp = 0. 5的修正值YUL7.5及容性oosp=0.5的修正值roc0.5。
36.1.2 For the power meter with the power factor range of 0.5 to 1, the correction value Y7.5 with UL
sensible cosφ=0.5 of the second and third line of Table 2, and the correction value γoc 0.5 with
cosφ=0.5.
34
36.1.3对全功率因素和低功率因数的功率表，应给出表3第2及第3栏或
表4第3和第4栏的感性或容性零功率因数的修正值rolo及roco。
36.1.3 For the power meter with all power factor and low power factor, correction values γol0 and
γoc0 of sensible and capacitive e zero power factor of the second line and third line of Table 3 and the third line and the fourth line of Table 4 should be given.
36.1.4对低功率因数功率表还应给出表4第2栏中的容性额定功率因数下
的修正值。
36.1.4 For the power meter with lower power factor, correction values under capacitive rating power factor in the second line of Table 4 should also be given.
36.2对每一个检定电压非基本量限，应增加在该量限额定电压U及基本量
限额定电流Ino条件下和36.1款相应的数据，即表2或表3的第4, 5和
6栏的修正值，或表4第5, 6, 7和8栏的修正值。
36.2 For each nonbasic metering limit of verification voltage, rating voltage U of the metering limit and corresponding data of Section 36.1 under the condition of rating current I of basic no
metering limit should be added, i.e., correction values in the fourth, fifth and sixth line of Table 2 or Table 3, or correction values of the fifth, sixth, seventh and eighth line of Table 4.
36.3对每一个检定电流非基本量限，应增加在该量限额定电压Un及该量
限额定电流I下和36.1款相应的数据，即表2或表3的第7, 8和9栏的
修正值，或表4第9, 10, 11和12栏的修正值。
36.3 For each nonbasic metering limit of verification current, rating voltage Un of the metering limit and corresponding data of Section 36.1 under the condition of rating current I of basic metering limit should be added, i.e., correction values in the seventh, eighth and ninth line of Table 2 or Table 3, or correction values of the ninth, tenth, eleventh and twelfth line of Table 4.
36.4对用尸要求增加指定的cosP值的检定，按对应额定功率因数低功率
因数功率表(表4)的规定给出检定数据。
36.4 For the verification of cosφ value designated by users, verification data are given by the regulation of the power meter (Table 4) according to the low power factor of corresponding rating power factor.
37周期检定的检定证书中，还可包括根据用户要求进行其他测量项目的检
定结果。
37. The verification certificate for periodic verification should also include verification results of other meting items according to requirements of users.
38对新生产或修理后首次检定的检定证书中，除应该包括36条，37条的
各种数据外，还有下列内容:
38. The verification certificate for initial verification of newly manufactured and after repair power meter should also comprise the following contents except all data of Section 36 and Section 37:
38.1对每一个进行测量频率响应的检定频率，都应给出和36条对应的数
据，但基本量限在感性额定功率因数下的检定，仅在量限的额定电流1,}
值下进行。
38.1 For each verification frequency with the measurement of frequency response, corresponding data in Section 36 should be given, but the verification of the basic metering limit under the 35
sensible rating power factor is only carried out under the rating current I value of the metering no
limit.
38.2其他首次检定项目的检定结果。
38.2 Verification results of other items for initial verification
39当检定给出的各修正值都不超过技术条件的允许值时，被检表被认为检
定合格。
39. When each correction value given by verification doesn’t exceed the permissible value of the technical conditions, the verified meter is taken as qualified.
检定合格的被检表给检定证书。部分量限或频率范围检定合格的被检
表允许发给带有限制使用范围专用章的检定证书，允许使用的量限及频率
范围为周期检定合格，并且是首次检定合格的量限和频率范围。
Verification certificates are given to the qualified verified meters. Verification certificates with the special stamps of limited use range are allowed to be given to the verified meters with partial metering limit or verification qualification in partial frequency range.
检定不合格而不准使用的数字功率表，发给检定结果通知书，要说明
不合格的原因。
Verification result notices are given to unqualified digital power meters which are not allowed to be used, and unqualified reasons are described.
40检定数据的化整，应按四舍五入的扩展方法进行，修正值的化整间距，
不得大于被检表允许误差的1 /4，不得小于被检表允许误差的1 /20。
40. The integration of verification data should be carried out in the expansion method of rounding off. The integration distance of the correction values should not be one fourth more than the permissible errors of the verified meter, and should not be one twentieth less than the permissible errors of the verified meter.
41数字功率表的检定周期为一年。
41. The verification period of the digital power meter is one year.
表二 功率因数范围为0.5—0.1的数字功率表周期检定结果数据表
序号 γ=(Ps-Px)/ UnIncosφn Px的测量条件 备
注 名称 代号 频率 电压 电功率
流 因数
1 基本量限示值Px的Px f0 Un0 i=0CosφN
基修正值 -N* n=1 为
本大2 基本量限感性cosφL0.5 f0 Un0 In0 0.5L
量于=0.5的修正值
限 43 基本量限容性cosφC0.5 f0 Un0 In0 0.5C
的=0.5的修正值
正电4 电压非基本量限的修Un f0 Un In0 Cosφ
整压正值 n=1
36
非5 电压非基本量限感性uL0.f0 Un In0 0.5L 数 基cosφ=0.5的修正值 5Un
本6 电压非基本量限容性uC0.f0 Un In0 0.5C 量cosφ=0.5的修正值 5Un
限
电7 电流非基本量限的修In f0 Un0 In Cosφ流正值 n=1 非8 电流非基本量限感性iL0.f0 Un0 In 0.5L 基cosφ=0.5的修正值 5In
本
9 电流非基本量限容性iC0.f0 Un0 In 0.5C 量
cosφ=0.5的修正值 5In 限
符号说明:Un0—基本量限的额定电压;Un一量限的额定电压，基本量限有Un= Un0: In0--基本量限的额定电流;基本量限有In=Ino: cosφn---额定功率因数，在本表中为1: Px=UxIxcosφx; ΔPx=Px-Ps;Ps----被测功率约定真值。Pn=UnIncosφn
----量限的额定功率;f0----基本频率范围的检定频率‘(L)—感性功率因数;(C)—容性功率因数
Table 2 Data Table of Period Verification Results of Digital Power Meter with the Power
Factor Range of 0.5 to 0.1
γ=(P-P)/ UIcosφn Measurement Conditions of Px Serial sxnn
Num-Notes Frequen-Vol-Cur-Power ber Name Code cy tage rent Factor
Correction Values of
Indication Values of i=0-Cosφn=1 Px f U 0n0Basic Metering Limit N* 1
Px Basic Correction Values of Meter-2 Sensible cosφ=5 of L0.5 f U I 0.5L 0n0n0ing Limit Basic Metering Limit
Correction Values of N is 3 Capacitive cosφ=5 of C0.5 f U I 0.5C 0n0n0posi-Basic Metering Limit tive
inte-Correction Values of Cosφn=ger 4 Voltage Nonbasic Un f U I 0nn01 larger Metering Limit
than 4 Correction Values of Voltage Sensible cosφ=5 of uL0.Nonbasic 5 f U I 0.5L 0nn0Voltage Nonbasic 5Un Metering Metering Limit Limit Correction Values of
Capacitive cosφ=5 of uC0.6 f U I 0.5C 0nn0Voltage Nonbasic 5Un
Metering Limit
37
Correction Values of Cosφn= U I 7 Current Nonbasic In f0n0n1 Metering Limit
Correction Values of Current Sensible cosφ=5 of iL0.5Nonbasic 8 f U I 0.5L 0n0nCurrent Nonbasic In Metering Metering Limit Limit Correction Values of
Capacitive cosφ=5 of iC0.59 f U I 0.5C 0n0nCurrent Nonbasic In
Metering Limit
Description of Signs:U is rating voltage of basic metering limit; Unis rating voltage of voltage n0
metering limit; Basic metering limit Un= U; In0 is rating current of basic metering limit;Basic n0
metering limit In=Ino; cosφn is rating power factor. In this table, 1: P=UIcos; ΔP=P-P;Ps is xxxφxxxsconventional true value of metered power. Pn=UI; cos is rating power of metering limit;f is nnφn0verification frequency of basic frequency range; (L) is sensible power factor; and (C) is capacitive
power factor.
表3全功率因数数字功率表周期检定结果数据表
序号 γ=(Ps-Px)/ UnIncosφn Px的测量条件 备
注 名称 代号 频率 电压 电功率
流 因数
1 基本量限示值Px的Px f0 Un0 i=0CosφN基修正值 -N* n=1 为本大2 基本量限感性零功率L0.5 f0 Un0 In0 0L 量于因数的修正值
限 43 基本量限容性零功率C0.5 f0 Un0 In0 0C
的因数的修正值
正电4 电压非基本量限的修Un f0 Un In0 Cosφ
整压正值 n=1
数 非5 电压非基本量限感性uL0.f0 Un In0 0L 基零功率因数的修正值 5Un
本6 电压非基本量限容性uC0.f0 Un In0 0C 量零功率因数的修正值 5Un 限
电7 电流非基本量限的修In f0 Un0 In Cosφ流正值 n=1 非8 电流非基本量限感性iL0.f0 Un0 In 0L 基零功率因数的修正值 5In
本
9 电流非基本量限容性iC0.f0 Un0 In 0C 量
零功率因数的修正值 5In 限
符号说明:Un0—基本量限的额定电压;Un一量限的额定电压，基本量限有Un= Un0: 38
In0--基本量限的额定电流;基本量限有In=Ino: cosφn---额定功率因数，在本表中为1: Px=UxIxcosφx; ΔPx=Px-Ps;Ps----被测功率约定真值。Pn=UnIncosφn
----量限的额定功率;f0----基本频率范围的检定频率‘(L)—感性功率因数;(C)—容性功率因数
Table 3 Data Table of Periodic Verification Results of All Power Factor Digital Power Meter
Measurement Conditions of PSerial γ=(P-P)/ UIcos xsxnnφn
Num-Notes Fre-Vol-Cur-Power ber Name Code quency tage rent Factor
Correction Values of
Indication Values of i=0-Cosφn=1 P f U x0n0Basic Metering Limit N* 1
Px Correction Values of Basic 2 Sensible Power Factor L0.5 f U I 0L 0n0n0Metering of Basic Metering Limit Limit Correction Values of
Capacitive Power 3 C0.5 f U I 0C 0n0n0Factor of Basic
Metering Limit
Correction Values of
4 Voltage Nonbasic Un f U I Cos=1 0nn0φn
Metering Limit
Correction Values of
N is Sensible Zero Power Voltage uL0.posi-5 Factor of Voltage f U I 0L 0nn0Nonbasic 5Un tive Nonbasic Metering Metering inte-Limit Limit ger Correction Values of
larger Capacitive Zero Power uC0.than 4 6 Factor of Voltage f U I 0C 0nn05Un Nonbasic Metering
Limit
Correction Values of Cosφn=7 Current Nonbasic In f U I 0n0n1 Metering Limit
Correction Values of
Sensible Zero Power Current iL0.58 Factor of Current f U I 0L 0n0nNonbasic In Nonbasic Metering Metering Limit Limit Correction Values of
Capacitive Zero Power iC0.59 Factor of Current f U I 0C 0n0nIn Nonbasic Metering
Limit
Description of Signs:U is rating voltage of basic metering limit; Un is rating voltage of metering n0
limit; Basic metering limit U= U. I is rating current of basic metering limit;Basic metering nn0n0
limit I=Icos, which is rating power factor. In this table, 1: P=UIcos; ΔP=P-P;P is nnoφnxxxφxxxssconventional true value of metered power. P=UI; cos is rating power of metering limit;f is nnnφn0verification frequency of basic frequency range; (L) is sensible power factor; and (C) is capacitive
power factor.
39
表4 低功率因数数字功率表周期检定结果数据表
序号 γ=(Ps-Px)/ UnIncosφn Px的测量条件 备
注 名称 代号 频率 电压 电功率
流 因数
1 基本量限示值Px的Px f0 Un0 i=0CosφN基修正值 -N* nL 为本大2 基本量限容性额定功C f0 Un0 In0 Cosφ量于率因数修正值 nC 限 43 基本量限感性零功率L f0 Un0 In0 0L
的因数的修正值
正4 基本量限容性零功率C f0 Un0 In0 0C
整因数的修正值
数 电5 电压非基本量限的修Un f0 Un In0 Cosφ压正值 nL 非6 电压非基本量限容性Uc f0 Un In0 Cosφ基的修正值 Un nC 本7 电压非基本量限感性uLUn f0 Un In0 0L 量零功率因数的修正值
限 8 电压非基本量限容性uCUn f0 Un In0 0C
零功率因数的修正值
电9 电流非基本量限的修iIn f0 Un0 In Cosφ流正值 nL 非10 电流非基本量限容性icIn f0 Un0 In Cosφ基的修正值 nC 本11 电流非基本量限感性iLIn f0 Un0 In 0L 量零功率因数的修正值
限 12 电流非基本量限容性iCIn f0 Un0 In 0C
零功率因数的修正值
符号说明:Un0—基本量限的额定电压;Un一量限的额定电压，基本量限有Un= Un0: In0--基本量限的额定电流;基本量限有In=Ino: cosφn---额定功率因数，在本表中为1: Px=UxIxcosφx; ΔPx=Px-Ps;Ps----被测功率约定真值。Pn=UnIncosφn
----量限的额定功率;f0----基本频率范围的检定频率‘(L)—感性功率因数;(C)—容性功率因数
Table 4 Data Table of Periodic Verification Results of Low Power Factor Digital Power Meter
Measurement Conditions of PSerial γ=(P-P)/ UIcos xsxnnφn
Num-Notes Fre- Vol- Cur-Power ber Name Code quency tage rent Factor 40
Correction Values of
Indication Values of i=0- f U CosφnL 1 Px0n0N* Basic Metering Limit
Px
Correction Values of
Capacitive Rating 2 C f U I CosφnC 0n0n0Power Factor of Basic Basic Metering Limit Metering Correction Values of Limit 3 Sensible Power Factor L f U I 0L 0n0n0
of Basic Metering Limit
Correction Values of
Capacitive Power 4 C f U I 0C 0n0n0Factor of Basic
Metering Limit
Correction Values of
5 Voltage Nonbasic Un f U I CosφnL 0nn0
Metering Limit
Capacitive Correction
Values of Voltage Uc 6 f U I CosφnC 0nn0Nonbasic Metering Un
Limit N is Voltage posi-Correction Values of Nonbasic tive Sensible Zero Power Metering uLUinte-7 Factor of Voltage f U I 0L 0nn0Limit n ger Nonbasic Metering
larger Limit
than 4 Correction Values of
Capacitive Zero Power uCU8 Factor of Voltage f U I 0C 0nn0n Nonbasic Metering
Limit
Correction Values of
9 Current Nonbasic iIn f U I CosφnL 0n0n
Metering Limit
Capacitive Correction
Values of Current 10 icIn f U I CosφnC 0n0nNonbasic Metering
Limit Current Correction Values of Nonbasic Sensible Zero Power Metering 11 Factor of Current iLIn f U I 0L 0n0nLimit Nonbasic Metering
Limit
Correction Values of
Capacitive Zero Power
12 Factor of Current iCIn f U I 0C 0n0n
Nonbasic Metering
Limit
Description of Signs:U is rating voltage of basic metering limit; Un is rating voltage of metering n0
limit; Basic metering limit U= Un0; In0 is rating current of basic metering limit; Basic metering n
limit I=I; cos is rating power factor. In this table, 1: P=UIcos; ΔP=P-P; Ps is nnoφnxxxφxxxsconventional true value of metered power. P=UI; cos is rating power of metering limit;f is nnnφn0verification frequency of basic frequency range ; (L) is sensible power factor and (C) is capacitive
power factor.
41
附录1
Appendix 1
原始记录格式
Original Record Format
检定原始记录
Verification Original Record
仪器名称: 型号:
Name of Device: Type:
送检单位: 编号:
Submission Unit: Number:
制造厂: 证书号:
Manufactory: Certificate No.:
仪器规格:
Instrument Specification:
频率/Hz 量限被测功率参数值 被检表示值 标准表示值 引用修正值
(V/A) (PS-PX)/Pn cosφ U/A I/A (V或W) (V或W)
Indication Indication Reference Parameter Values of Values of Values of Metering Correction Metered Power Verified Standard Frequency/Hz Limit Values Meter Meter (V/A) (PS-PX)/Pn cosφ U/A I/A (V or W) (V or W)
42
O温度: C 检定员:
OTemperature: C Verifier: 湿度: % 校验员:
Humidity: % Checker:
年月日
Date:
附录2
Appendix 2
单相数字功率裹的部件检定方法
Verification Methods for Parts of Single Phase Digital Power Meter
2.1仅在下列条件下，允许对单相数字功率表用部件检定法进行检定。
2.1 Verification is only allowed to be carried out on the single phase digital power meter by part verification method under the following conditions.
2.1.1电压量限转换器，电流量限转换器，乘法器及直流数字电压表，仅通过乘法器的
输人量Xu Xi;及输出量U=相互作用，而其相互间干扰的影响对数字功率表的误差相比
是可以忽略的(一般应小于数字功率表允许误差的1/8倍)。
2.1.1 Voltage metering limit inverters, current metering limit inverters, multipliers and DC digital voltmeters interact through the input amount XU and Xi and the output amount U, while compared with the errors of the digital power meters, the influence of mutual interference can be ignored. (Generally the influence is one eighth less than the permissible error of the digital power meters).
2.1.2各Xu Xi及U=的量能够在功率表外测得，并反应它们在功率表工作的实际数值。
2.1.2 The amount of X, X and U can be measured out of the power meter, and reflects the actual uix
numerical value of the work of the power meter.
2.1.3各部件相互连接时，线路连接引起的附加误差可以忽略。
2.1.3 When all parts are interconnected, additive errors caused by line connection can be ignored.
2.1.4乘法器的两输人量为两额定值相同的同名量(电压或电流)。
43
2.1.4 Both input amount of the multiplier is the amount with the same name with two same rating values. (Voltage or current).
2.1.5数字功率表的功率因数变化范围为0—10
2.1.5 The change range of the power factor of the digital power meter is 0 to 10.
2.2单相功率表可以分别检定下列项目的误差极限值，并经综合得出单相功率表的示值
的误差极限值。
2.2 Error limit values of the following lists of the single phase power meter can be verified, and error limit values of the indication values of the single phase power meter are obtained through comprehension.
2 .2.1电压各量限转换器的变换系数相对误差γku.及时间常数τku。
2.2.1 Relative error γ and time constant τ of conversion coefficient of each metering limit kuku
inverter for voltage.
2.2.2电流各量限变换器的变换系数相对误差γki及时间常数τki。
2.2.2 Relative error γ and time constant τ of conversion coefficient of each metering limit kiki
inverter for current.
2.2.3直流电压表的各示值的基本误差?UP。
2.2.3 Basic errors ?U of each indication value of DC voltmeter. P
2.2.4乘法器在cosφ=1条件下，输出电压Ux的误差值?u =cosφ=1
2.2.4 Error value ?u =cosφ=1 of output voltage U under the condition of cosφ=1 of the multiplier. x
2.2.5乘法器的角误差值δx。
2.2.5 Angle error value δof the multiplier. x
2.2零功率因数下乘法器的不平衡误差?U=ui。
2.2 Unbalanced error ?U=u of the multiplier under zero power factor. i
2.3各部件检定结果的允许误差值应不大于部件本身允许误差值的1/4
倍，部件检定按表1所列的环境条件下进行。
2.3 Permissible error value of the verification result for each part should not be one fourth more than the permissible error of one self. The verification for parts is carried out under the environment conditions listed in Table 1.
2.4电压量限转换器和电流量限变换器一般在各量限的额定电压和额定电
流下进行检定。
44
2.4 The voltage metering limit inverter and the current metering limit inverter are generally verified under the rating voltage and the rating current of each metering limit.
当电压量限转换器和电流量限转换器的负载系数所引起的附加误差可
忽略时，允许在任意电压或电流下进行检定。
When the additive errors caused by the load coefficient of the voltage metering limit inverter and the current metering limit inverter can be ignored, verification can be carried out under any voltage or current.
电压量限转换器，事实上是交流分压器或交流两端电导;电流量限转换
器，事实上是交流分流器或交流四端电阻;可分别用侧量交流分压系数、交
流分流系数，交流两端电导及四端电阻的方法进行检定。
The voltage metering limit inverter is actually an AC voltage divider or AC conductivity at both ends. The current metering limit inverter is actually an AC current divider or AC resistors at four ends. The voltage metering limit inverter and the current metering limit inverter can be verified by respectively measuring AC voltage dividing coefficient, AC current dividing coefficient, AC conductivity at both ends and resistors at four ends.
2.5功率表的所属直流数字电压表应用直流数字电压表的检定规定进行。
2.5 The DC digital voltmeter belonged to the power meter is verified by the verification regulation of the DC digital voltmeter.
一般被检定的直流数字电压表示值为(0---10) ×O.lUn，其中Un为功
率变换器的额定输出电压。
The indication value of the verified DC digital voltmeter is generally (0---10) ×O.lU, wherein n
Uis the rating output voltage of the power inverter. n
检定结果以示值Up绝对误差?UP(UP)的形式给出。
Verification results are given in the form of the absolute error ?U(U) of the indication value PP
U. p
2.6在功率因数COSφ = l时乘法器的输出电压误差可用交流标准电压源
及感应分压器(或用交流标准电流源及感应分流器)控制Xu和Xi;的幅值和
相互同相，Xu的幅值控制相对误差应小于乘法器允许引用误差允许值的
1/8倍。用弧度表示的X。和X;的同相控制误差应小于乘法器引用误差允
许值平方根的1/2倍。这时误差?u =cosφ=1的值的测量方法如下:
2.6 When the power factor COSφ is 1, the output voltage error of the multiplier can control the amplitude of X and X in the same phase mutually through the AC standard voltage source and ui
inductive voltage divider (or AC standard current source and inductive current divider). The 45
amplitude of Xu controls the relative error to be one eighth less than the permissible value of the
permissible fiducial error of the multiplier. The same-phase control errors of Xo and Xi expressed
by radian should be half less than the square root of the permissible error of the fiducial error of
the multiplier. The value of the error ?u =cosφ=1 is measured by the following methods at the time:
在基本频率范围的检定频率下，调节Xi的值，使Xi= (0-5) ×
0.2Xin〔其中Xin是量限X;的额定值)。在表1所示的检定条件下测量乘
法器的输出电压U=，则有:
Under the verification frequency of the basic frequency range, the value of X is adjusted so i
that X=(0-5) ×0.2X (wherein X is the rating value of the metering limit X). The output voltage iinini
U of the multiplier is metered under the verification conditions listed in Table 1, and there is the x
formula as follows:
2.7乘法器的角误差，在Xi=Xin;a, Xu.=Xun。条件下进行检定。为此在乘
法器输人端加上输入量X1和X2，其值应有:
2.7 The angle error of the multiplier is verified under the conditions of X=X;a and X.=X. The iinuun
input amount X1 and X2 is added to the input ends of the multiplier, the value should be as
follows:
式中a是很小的量。
In the formula, a is tiny amount.
先将X2加在Xu一端，X1,加在Xi;端，乘法器输出电压为Uoc;再将
xl加在Xu端，X2加在Xi;端，乘法器输出电压为Uo1;则δx可用下式表
示:
X2 is firstly added to the end of X, X is added to the end of X, and the output voltage of the u1i
multiplier is U. Then X is added to the end of X, X is added to the end of X, and the output oc1u2i
voltage of the multiplier is U. Then δcan be expressed by the following formula: o1x
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式中U=n—乘法器的额定输出电压值。
In the formula, U is the rating output voltage value of the multiplier. xn
式(2-2)示中的a应该小到使下式成立:
In the formula (2-2), a should be as small as possible to make the following formula be efficient:
式中U(δx)—乘法器相应频率下角误差δx的允许值;
In the formula, U(δx) is the permissible value of the angle error δx of the multiplier under corresponding frequency.
U=n-—乘法器的额定输出电压值。
Uxn is the rating output voltage value of the multiplier.
2.8在零功率因数条件下，乘法器不平衡误差?U=ui的测量。测量?U=ui
的乘法器输入量如下:
2.8 Measurement of unbalanced error ?U=ui of the multiplier under the condition of zero power factor. The measurement of ?U=ui of the input amount of the multiplier is as follows:
式中a是很小的量，而X2正负值的变化可以用X2输出端倒向达到。供给
输人量X2的电源应允许这样的倒向，并确保倒向的相角X1,X2准确变化
0180。
In the formula, a is tiny amount, while the change of the plus or minus sign of X2 can be achieved by the retrograding of the output end of x2. Power supply for supplying the input amount of X2 allows such retrograding, and the phase angles X1 and X2 for retrograding are ensured to be
0changed by 180.
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在基本频率范围的检定频率下，将X1输人乘法器的Xu端上，将符合
式(2-5)中第2式各值的X2输人乘法器的X1端，在X2=，[ X2]时，乘法
器的输出电压为U (X2),当X2=-[ X2]时，乘法器的输出电压为UO1OC
〔X2)，则在X2值下的?U=ui，可用下式表示:
Under the verification frequency of the basic frequency range, X1 is input onto the Xu end of the multiplier. X2 according with each value of the second formula in formula 2 to 5 is input onto the X1 end of the multiplier. When the X2 is +[X2], the output voltage of the multiplier is U01(X2). When X2 is –[X2], the output voltage of the multiplier is U0c (X2). Then ?U=ui of X2 value can
be expressed by the following formula:
同样a角应小到使下式得以成立:
In the same way angle a should be as small as possible to make the following formula be efficient:
式中U(δx)及U=n的意义同式(2-4) o
In the formula, the meaning of U(δ) and U is the same as that of formula 2 to 4. xxn
在非基本频率范围的检定频率下，上述U=ui仅在X2 = Xin值的条件
下进行检定。
Under the verification frequency of the nonbasic frequency range, the U is only verified xui
under the condition of X is equal to the value of X. 2in
2.9在周期检定时，本附录的2.4, 2.6, 2.7和2.8各项试验在工频段的
任一频率或用户指定的频率下进行。
2.9 In the periodic verification, each experiment of the Appendix 2.4, 2.6, 2.7 and 2.8 is carried out under any frequency of work frequency range or under the frequency designated by users.
2.10按本附录进行部件检定的结果可在检定证书中直接给出，也可换算成
表3中相应的数据，由检定证书给出。
2.10 Verification results for parts according to this Appendix are directly given out in the verification certificate, or can be converted into corresponding data in Table 3 and be given out by the verification certificate.
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