Page 1 of 7 pages  
 Technical Specification for  
the Verification and Inspection of  
Electric Vehicle Supply Equipment  S/N CNMV 207 
Rev. 1 
1. Th is technical specification is developed  pursuant to the stipulations in Paragraph 2 of 
Articles 14  and Paragraph 2 of Articles 16 in the Weights and Measures Act.  
2. The date of promulgation, document number, date of enforcement and content of amendment 
are listed as follows:  
Rev. Date of  
Promulgation  Document No. 
(Ching -Piao-Szu-Tsu )  Date of  
Enforcement  Content of Amendment  
1 2022-05-16 No. 1114000 3290 2023-01-01  
 
3. This specification  is formulated with reference to the following international regulations and 
specifications : 
(1) IEC 62052 -11:2020  Electricity metering equipment – General requirements, 
tests and test conditions – Part 11 : Metering equipment.  
(2) IEC 62053 -21:2016 Electricity metering equipment (a.c.) – Particular 
requirements –Part 21 : Static meters for active energy (classes 1 and 2).  
(3) IEC 62053 -41:2020 Electricity metering equipment – Particular 
requirements –Part 41 : Static meters for DC energy (classes 0,5 and 1).  
(4) National Institute of Standards and Technology Handbook 44, §3.40, 2019.  
(5) PTB-A 50.7 Anforderungen an elektronische und softwaregesteuerte 
Messgeräten und Zusatzeinrichtungen für Elektrizität, Gas, Wasser und Wärme.  
(6) CNS 15511 -1:2021  Electric vehicle conductive charging system – Part 1: 
General requirements + Amendment 1  
(7) CNS 14607:2017 Static electricity meters  
Date of Prom ulgation  
2022-05-16 Bureau of Standards, Metr ology and Inspection, 
Ministry o f Economic Affairs  Date of Enforcement  
2023-01-01 
NO GUARANTEE ON THE TRANSLATION  
In case of discrepancies between the English translation and Chinese text, the Chinese text shall govern.  
Page 2 of 7 pages  
 1. Scope : This technical specification applies to electric  vehicles (EV) supply 
equipment for charging electric  vehicles,  with a rated supply voltage up to 1,000 
Vac or 1,500 V dc and a rated output voltage up to 1,000 Vac or 1,500 Vdc that shall 
be subject to verification and inspection. The structure diagram of electric  vehicle  
supply equipment  is as follow s. Electric  vehicles cover all road vehicles, 
including plug -in hybrid electric  vehicles (PHEV), that derive all or part of the 
energy from on -board rechargeable energy storage systems (RESS).  
This technical specification also applies to electric  vehicle  supply equipment 
supplied from on -site storage systems (e.g. buffer batteries).  
 
Note: The display can be installed  externally or internally  in the electric  vehicle  
supply equipment.  
2. Definition  
2.1 Electric  vehicles  (EV) supply equipment  
Equipment or a combination of equipment, providing dedicated functions to 
supply electric energy from a fixed electrical installation or supply network 
to an electric  vehicle  for the purpose of charging.  
2.2 AC electric  vehicles  supply equipment  (AC EV supply equipment)  
Electric  vehicles  supply equipment that supplies alternating current to an 
electric  vehicle . 
2.3 DC electric  vehicles  supply equipment  (DC EV supply equipment)  
Electric  vehicles  supply equipment that supplies direct current to an electric  
vehicle . 
2.4 Charging  
Adjusting a ll functions of voltage and/or current provided by the AC or DC 
supply network to assure the  energy  suppl y to the rechargeable energy 
Page 3 of 7 pages  
 storage systems (RESS) . 
2.5 Rated current, I n 
The maximum output current of each vehicle connector  that can meet the 
accuracy requirements of this technical specification.  
2.6 Display  
A device that can display the content stored in the  memory, and the 
measured or recorded data  can be read easily . 
2.7 Percentage error  
Metering  percentage error  of supply equipment (%) =   
3. Test apparatus of verification and inspection  
3.1 Test apparatus of verification and inspection  including:  
(1) The power analyzer includes current shunt (or current sensor) , AC: 
1,000 V and greater than  or equal to  600 A  (200 A for each phase ); 
DC: 1,500 V  and greater than  or equal to  600 A, accuracy within ± 0.1 
%. 
(2) Timing equipment s: resolution of time measurement ≤ 0.1 seconds.  
3.2 Test apparatus in Section 3.1 shall have trace ability and evaluation of 
uncertainty reports, that the valid calibration documents are traceable to 
national standards or international standards.  
4. Sructures  
4.1 The items marked on the nameplate of the output terminal of the electric 
vehicle supply equipment are as follows. The nameplate sh all be fixed at 
the position of each output termina l of the electric vehicle supply 
equipment body : 
(1) The manufacturer's name, initials, trademark or distinctive marking.  
(2) Type designation or identification number or any other means of 
identification, making it possible to obtain relevant information from 
the manufacturer  of the electric vehicles supply equipment . 
(3) Serial number or manufactur ing number.  
(4) Identif ication  of manufactur ing date . 
(5) Type of electric current.  
(6) Frequency and  number of phases in case of alternating current.  
(7) Rated voltage (input and output  respectively , if not the same ). 
(8) Rated current (input and output  respectively , if not the same ). 
4.2 The display of the e lectric  vehicles  supply equipment shall indicate legibly , 
definitely, accurately, and easy to read under normal conditions of 
operation.  
4.3 Electric  vehicles  supply equipment may be connected with on  external 
display (wired or wireless), and the display can be used by two or more 
Indication  Standard value100 %Standard valuePage 4 of 7 pages  
 electric  vehicles  supply equipment .Where an external display  is being used, 
the display  and the electric  vehicles  supply equipment are r egarded as  an 
integrated  equipment and shall  not be replaced or removed arbitrarily.  
4.4 The display shall be installed such that the users can read the indicat ion 
easily . Moreove r, it shall indicate clearly which  equipment and vehicle 
connector has been used . 
4.5 The unit of e lectric  energy measurement for  charg ing electric vehicles shall 
be indicated and recorded in kilowatt -hour (kWh) a nd decimal subdivisions 
thereof . In addition,  time indication  shall include year, month, day, hour, 
minute, and second.  
4.6 The smallest metering unit of recorded energy delivery by an electric  
vehicles  supply equipment shall be 0.001 kWh.  
4.7 The output voltage and output current of the  electric vehicle supply 
equipment shall be adjusted in accordance with the verification and 
inspection requirements, and can provide a time signal output to facilitate the 
implementation of the verification and inspection.  
4.8 The software version of the energy metering software of electric  vehicles  
supply equipment shall be identified.  
5. Verification, Inspection, and maximum permissible errors  
5.1 Initial  verification  
5.1.1 Accuracy test  
Accuracy test of electric  vehicles  supply equipment shall conform to the 
following requirements of Table 1 and Table 2. The test shall be 
conduct ed 3 times  under each test conditions , and shall conform to the 
following requirements of Table 1 and Table 2 every time . However, the 
electric vehicle supply equipment installed before the implementation date 
may be tested 3 times under any loading condition, and each test shall  be 
conducted  not less than 15 seconds.  
Table 1 Maximum permissible errors of electric  energy  verification  for AC 
electric  vehicles supply equipment  
Electric  vehicles  supply 
equipment output current 
(A) Power factor  Maximum permissible 
errors of verification (%)  
0.85 I n 1 ± 1 
0.1 I n ± 1 
 
Table 2 Maximum permissible errors of electric  energy  verification  for DC 
electric  vehicles supply equipment  Page 5 of 7 pages  
 Electric  vehicles  supply equipment 
output current (A)  Maximum permissible errors of 
verification  (%) 
0.85 I n ± 1 
0.1 I n ± 1 
 
5.1.2 Repeatability test  
The accuracy  test of electric vehicle supply equipment shall  be carried out 
for 3 times consecutive ly under the same loading conditions.  Percentage 
error of the minimum value subtracted from the maximum value shall not 
exceed one -fourth of the maximum permissible erro rs of verification . 
5.1.3 Time -keeping accuracy  
Where the e lectric  vehicles  supply equipment  and additional equipment  
have the internal time clock ( equipment time clock ) for time -keeping , 
depending on the purpose, there are different re quirements as following : 
(1) When  the national standard time is used to determine the exact time 
of registration and transmission of data, for example, the data is 
stored with a time stamp , the equipment time clock must can be 
converted to  the national standard time . The equipment time clock  
shall operate synchronized so that it s deviat ion from the national 
standard time shall  less than 3 %  of the measurement time , and the 
maximum value of measurement  shall not exceed 27 seconds.  
(2) The time interval of the measurement, for example, when 
determining the average interval time based on the time stamp, this 
case only represents the time series of the measurement value, and 
does not necessarily have to be based on the legal time.  The time 
interval of the measurement shall only deviate from the setting  value 
by less than 1 %.  
5.2 Re-verification  and inspection  
Re-verification  or inspection after initial  verification may be conducted  
under any loading condition , and each test shall  be conducted  not less than 
15 seconds. I n addition, the  test data shall  be recorded at least 3 times,  and 
errors  shall be less than or equal to twice the maximum permissible errors 
of initial  verification.  
6. Verification mark  and certificate  
6.1 The validity period of the verification is starting from the date on which 
the verification mark is attached to two years after the first day  of the 
month following the month of the date on which the verification mark is Page 6 of 7 pages  
 attached.  
6.2 Electric vehicle supply e quipment sh all apply for re -calibration if the 
adjustment of software, hardware or component maintenance affects the 
measurement results.  
6.3 Where t he electric  vehicles supply equipment of multiple vehicle 
connectors  verified under the same verification certificate  has been 
repaired , adjusted or modified , all of the vehicle connectors  shall apply for 
re-verification . After passing the verification, each vehicle connector will 
be attached with a verification mark . In the case that the original 
verification  certificate  of has been removed and some adjustments  have 
been made to the electric  vehicles supply equipment , when the verification 
personnel on-site confirms that the adjustment is only made for a specific 
vehicle connector , the verification may be performed only for the specific 
vehicle connector  and the verification mark could be attached . When t he 
electric  vehicles supply equipment  of multiple vehicle connectors using  
the same verification certificate  is unqualified after inspection, its 
verification mark shall be removed . Besides, a  mark  of not in service  shall 
be attached, and the shared  verification certificate  shall not be removed . 
6.4 The verification mark  shall be attached with a physical adhesive 
tamper -evident on the opening of outer covering  of the metering module 
to prevent tampering with metering functions. The physical adhesive 
tamper -evident shall be attached to the adequate  place  depending on the 
opening method  of the equipment, and the verification mark  shall be 
attached on the obvious place on the front of  the electric  vehicles  supply 
equipment.