Page 1 of 7 pages  
 Technical Specification for  
the Verification and Inspection of  
Electric Vehicle Supply Equipment  S/N CNMV 207 
Rev. 2 
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  
2 2022 -10-12 No. 11140007570  2023 -01-01 1. The Document review  
procedure has been 
added.  Test compliance  
document s of 3 test items 
for each type shall be 
provided before the first 
submission for 
verification.  
2. Revise the initial 
verification test items . 
 
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  
2022-10-12 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 e quipment)  
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  supply 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 ca n 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. Document review  
When the electric vehicles supply equipment of each type is first submitted for 
verification , it shall provide the test certificate  document s issued by the 
laboratory which shall be accredited and granted an accreditation certificate 
issued by a signatory of the ILAC MRA (International Laboratory Accreditation 
Cooperation Mutual Recognition Arrangement) on behalf of the Republic of 
China  and th e test certificate documents shall compliance with Section 3.1, 3.2 
and 3.3.  
3.1 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 .  
Table 1 Electric  energy  test error for AC electric vehicles supply equipment  
Electric vehicles supply 
equipment output current (A)  Power factor  Maximum permissible 
test error (%)  
0.85 I n 1 ± 1 
0.1 I n ± 1 
Table 2 Electric  energy  test error for DC electric vehicles supply equipment  
Electric vehicles supply equipment 
output current (A)  Maximum permissible  test error (%)  
0.85 I n ± 1 
0.1 I n ± 1 
3.2 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 test error.  
3.3 Time -keeping accuracy  
Indication  Standard value100 %Standard valuePage 4 of 7 pages  
 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 requirements 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 stand ard time. The equipment time clock shall operate 
synchronized so that its 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 meas urement, 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 %. 
4. Test apparatus of verification and inspection  
4.1 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.  
4.2 Test apparatus in Sectio n 4.1 shall have traceability and evaluation of 
uncertainty reports, that the valid calibration documents are traceable to 
national standards or international standards.  
5. Sructures  
5.1 The items marked on the nameplate of the output terminal of the electric 
vehicle supply equipment are as follo ws. 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.  Page 5 of 7 pages  
 (7) Rated voltage (input and output  respectively , if not the same ). 
(8) Rated current (input and output  respectively , if not the same ). 
5.2 The display of the e lectric  vehicles  supply equipment shall indicate legibly , 
definitely,  accurately, and easy to read under normal conditions of 
operation.  
5.3 Electric  vehicles  supply equipment may be connected with on  external 
display (wired or wireless), and the display can be used by two or more 
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.  
5.4 The display shall be installed such that the users can read the indication 
easily . Moreove r, it shall indicate clearly which  equipment and vehicle 
connector has been used . 
5.5 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.  
5.6 The smallest metering unit of recorded energy delivery by an electric  
vehicles  supply equipment shall be 0.001 kWh.  
5.7 The output voltage and output current of the electric ve hicle 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.  
5.8 The software version of the energy metering software of electric  vehicles  
supply equipment shall be identified.  
6. Verification, Inspection, and maximum permissible errors  
6.1 Initial  verification  
6.1.1 Accuracy test  
The electric vehicle supply equipment installed (including  the past to the 
implementation date ) that  shall be tested at least 3 times under any loading 
condition, and each test shall be conducted not less than 15 seconds. Each 
test of electric vehicles supply equipment shall conform to the following 
requirements of Table 3 and Table 4.  
Table 3 Electric  energy  verification  error for AC electric  vehicles supply 
equipment  
Electric  vehicles  supply 
equipment output current (A)  Power factor  Maximum permissible 
verification error (%) Page 6 of 7 pages  
 Any current  1 ± 1 
Table 4 Electric energy  verification  error for DC electric  vehicles supply 
equipment  
Electric  vehicles  supply equipment 
output current (A)  Maximum permissible  
verification  error (%) 
Any current  ± 1 
6.2 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.  
7. Verification mark  and certificate  
7.1 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 attached.  
7.2 Electric vehicle supply equipment sh all apply for re -calibration if the 
adjustment of software, hardware or component maintenance affects the 
measurement results.  
7.3 Whe re the 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 . 
7.4 The verification mark  shall be attached with a physical adhesive Page 7 of 7 pages  
 tamper -evident on the opening of outer covering  of the metering module to 
prevent tampering with metering functions. The physical adhesive 
tamper -evident sha ll 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.