JJG 1193-2023 English PDF (JJG1193-2023)

This Regulation applies to the first verification, subsequent verification, in-use inspection of the calibrator of AC charging piles for electric vehicles.

JJG 1193-2023
JJG
METEROLOGY & VERIFICATION SPECIFICATION
OF THE PEOPLE’S REPUBLIC OF CHINA
Calibrator of AC charging piles for electric vehicles
ISSUED ON: MARCH 15, 2023
IMPLEMENTED ON: SEPTEMBER 15, 2023
Issued by: State Administration for Market Regulation
Table of Contents
Introduction ... 4
1 Scope ... 5
2 Normative references ... 5
3 Overview ... 5
4 Metering performance requirements ... 6
4.1 Electric energy error ... 6
4.2 Limit operating error ... 7
4.3 Ports and display ... 7
4.4 Repeatability of energy measurement ... 7
4.5 Indication error of monitoring unit ... 7
4.6 Clock time error ... 8
5 General technical requirements ... 8
5.1 Appearance and power-on inspection ... 8
5.2 Insulation resistance ... 8
5.3 AC withstanding voltage ... 8
6 Metering instrument control ... 9
6.1 Test conditions ... 9
6.2 Measuring standards and other equipment ... 9
6.3 Verification items and verification methods ... 10
6.4 Processing of verification results and test cycle ... 14
6.5 Verification cycle ... 14
Appendix A Original record format of verification ... 15
Appendix B Inner page format of verification certificate/test result notification (page 2) ... 18
Appendix C Format of test result page for verification certificate/ verification result notification (page 3) ... 19
Verification regulation of calibrator of AC charging piles for
electric vehicles
1 Scope
This Regulation applies to the first verification, subsequent verification, in-use inspection of the calibrator of AC charging piles for electric vehicles. 2 Normative references
This procedure references the following documents:
JJG 597 Verification regulation of verification equipment for AC electrical energy meters
JJG 1085 Reference meters for electrical energy
JJG 1148 AC Charge spots for electric vehicles
JJF 1662 Calibration specification for clock testers
For dated references, only the dated version applies to this regulation; for undated references, its latest version (including all amendments) applies to this Regulation. 3 Overview
The calibrator of AC charging piles for electric vehicles (hereinafter referred to as the calibrator) is a device, which is used to calibrate the AC charging pile for electric vehicle. It is divided into a single-phase calibrator and a three-phase calibrator. It can measure the parameters, such as the electric energy, time, current, voltage, phase, frequency, etc., of the charging piles.
The principle diagram of the calibrator is as shown in Figure 1. It is mainly composed of a control unit, a charging gun port, a load interface, an AC power standard (including a monitoring unit), a clock unit, a display unit, a control guidance unit (provided by the load).
The calibrator simulates the charging demand of the electric vehicle through the receiving control guidance unit. The load interface connects the simulated load or vehicle, which simulates the charging demand of the electric vehicle. It monitors parameters such as voltage, current, phase, frequency, etc. The AC power standard phase calibrator shall not be less than 5 kWh; the accumulated electric energy error shall meet the requirements in Table 1.
4.2 Limit operating error
For a calibrator whose working temperature is higher than 40 °C, the power error at 50 °C shall meet the requirements in Table 1.
For a calibrator whose operating temperature is lower than -10 °C, the power error at - 20 °C shall meet the requirements in Table 1.
4.3 Ports and display
4.3.1 The calibrator shall have pulse input and output ports; display the electric energy value and the number of pulses; the pulses shall be rectangular waves with a certain amplitude; it shall provide the pulse constant C [imp/ (kWh)] of the pulse output. 4.3.2 The calibrator shall display the accumulated electric energy value, which has at least 4 decimal places; the displayed electric energy error shall have at least 2 decimal places.
4.3.3 When the calibrator operates under the conditions of maximum working voltage and maximum working current, its pulse frequency shall not be lower than the requirements in Table 2.
4.4 Repeatability of energy measurement
The electrical energy measurement repeatability of the single-phase and three-phase calibrator is characterized by the estimated value of the standard deviation of the electrical energy error, which shall meet the requirements in Table 3.
4.5 Indication error of monitoring unit
The indication error of the monitoring unit, which is configured for the calibrator, shall meet the requirements in Table 4.
4.6 Clock time error
The clock time error is better than ±1 s.
5 General technical requirements
5.1 Appearance and power-on inspection
The calibrator shall display the following information:
- Product name and model;
- Manufacturer and exit-factory number;
- Pulse constant C (imp/kWh);
- Accuracy level;
- Measuring range.
After the calibrator is powered on, the functions and software control shall be normal. 5.2 Insulation resistance
Apply a 1 kV DC voltage between the power supply terminal of the calibrator and the ground (metal case), the charging gun port terminal and the ground (metal case); the insulation resistance shall not be less than 10 MΩ.
5.3 AC withstanding voltage
The calibrator powered by AC is in the non-working state; the power switch is placed in the ON position; the voltage of AC 1.5 kV is applied between the input terminal of the power supply and the case, for a duration of 1 min. The leakage current is not greater than 10 mA, meanwhile there shall be no spark discharge or breakdown.
All the lines, whose charging port voltage exceeding 40 V, are connected together as one point; the other point is the ground. The test voltage is applied between the two points, which shall be able to withstand the power frequency AC 2 kV withstanding voltage test, for a duration of 1 min. The leakage current is not greater than 10 mA, meanwhile the test voltage shall not have spark discharge or breakdown. 6 Metering instrument control
6.1 Test conditions
The reference value of environmental conditions and their deviation shall not exceed the provisions in Table 5.
6.2 Measuring standards and other equipment
6.2.1 For the measuring device used in the verification of the calibrator, the influence of the transfer or connection auxiliary device on the verification result shall be considered; the electric energy value shall be accumulated synchronously. 6.2.2 The accuracy level and standard deviation estimate of the measurement standard shall not exceed the requirements in Table 6; during each measurement period, the load power stability shall not be lower than the requirements in Table 7.
(or uncertainty) of the measurement standard error limit shall not be greater than 1/3 of the absolute value of the calibrator's error limit.
6.2.4 Reference clock
The time error of the reference clock shall not be greater than 1/10 of the time error of the clock of the verified calibrator.
6.3 Verification items and verification methods
6.3.1 Verification items
The verification items of the calibrator are as shown in Table 8.
6.3.2 Verification method
6.3.2.1 Appearance and power-on inspection
Check whether the appearance signs meet the requirements of 5.1.
Correctly connect the calibrator and measurement standard. Ground the equipment that needs to be grounded correctly. Power on and warm up according to the instructions. Check whether the port and display of the calibrator meet the requirements of 4.3. Check whether its function and software control are normal.
6.3.2.2 Insulation resistance
Select the 1 kV voltage output of the insulation resistance meter, to measure the insulation resistance according to the specified test position. The test results meet the requirements of 5.2.
6.3.2.3 AC withstanding voltage
Connect according to the requirements of 5.3. The test voltage shall rise from zero to the required voltage steadily within (5 ~ 10) s. Keep it for 1 min. Then drop to zero at the same speed. The test results meet the requirements of 5.3.
6.3.2.4 Energy error
a) Selection of test load point
The error measurement of the calibrator shall be at the input end of the muzzle. Under the verification environmental conditions, select the test load point, according to the provisions in Table 9. The three-phase calibrator is calibrated under a balanced load. When the three-phase calibrator is performing a single- phase calibration, the other two-phase voltage and current connection lines shall be disconnected.
Under each selected load point, make at least two measurements; take the average value as the measurement result.
b) Comparative method
Under 220 V and 50 Hz, respectively apply the load current specified in Table 9. The measurement standard and calibrator are both running continuously. The count m of pulses, which are output by the measurement standard when the calibrator outputs N pulses, is taken as the actual measured pulse count. Then compare it with the calculated pulse count m0. Use formula (1) to calculate the relative error γ of the calibrator.