1、 Overview
This equipment complies with the standards Q/GDW 1354-2013 "Functional Specification for Smart Energy Meters of State Grid Corporation of China", Q/GDW 1365-2013 "Technical Specification for Information Exchange Security Certification of Smart Energy Meters of State Grid Corporation of China", DL/T 645-2007 "Communication Protocol for Multi functional Energy Meters", and DL/T 460-2005 "Verification Regulations for AC Energy Meter Inspection Devices" and Q/G · DW 11421-2015 Technical Specification for External Circuit Breakers of Energy Meters. Can conduct the following project tests according to the requirements in the standard:
(1) Relay action voltage test
(2) Contact voltage drop (resistance) test
(3) Contact temperature rise test
(4) Overload test
(5) Electrical life test
(6) Mechanical life test
(7) Voltage withstand test between contacts in open circuit state
(8) Voltage withstand test between contact and coil
(9) Relay suction voltage and release voltage test
(10) Relay coil resistance test
(11) Voltage Range Test for Load Switch Operation of Electric Energy Meter
(12) Current circuit contact resistance test
The equipment adopts PLC as the main control unit, combined with computer for human-machine dialogue for control and automatic testing.
It consists of a computer console, a circuit breaker control panel, and a load cabinet.
2、 Equipment composition
1. Circuit breaker control panel
1) The shell is made of high-quality square tube, iron sheet baked paint and stainless steel;
2) The external dimensions are approximately 1.5 meters (length) * 0.78 meters (width) * 1.5 meters (height);
3) There are 40000 casters at the bottom for easy mobility;
4) The panel is equipped with one circuit breaker fixture;
5) The back panel has a connection port for computer communication and a terminal for connecting to the control cabinet;
6) Testing station: 1 station;
7) Wiring method: stable and reliable, beautiful and elegant, simple, using parallel wiring,
8) The test bench is simple and only handles fixtures, with a reasonable and reliable connection between the standard cabinet and the test bench.
9) Fixture: Each workstation can be operated independently, and the current terminal can be crimped in place by operating a separate crimping handle. Then, the corresponding screws of the tested switch can be manually tightened for easy installation and disassembly of the product. The interface should be simple, beautiful, and reliable.
10) Wiring method: Each workstation adopts a 2P switch wiring method, and the current is introduced in series with each pole; The current adopts the same convenient and durable contact externally, meeting the maximum current test of 1.45 In; The switch is installed vertically and has the function of real-time monitoring of the temperature of each pole (temperature detection accuracy of 1 degree Celsius).
11) Operation and installation: Before testing, manually grab the product to the testing station, place the product on the corresponding terminal of the station, and use a screwdriver or fixture to tighten the corresponding screw of the switch.
2. Load cabinet
1) The whole machine is made of high-quality sheet metal, with a smooth gray white paint on the sealing surface and blue paint on the skeleton. There are 4 casters at the bottom of the chassis;
2) The external dimensions are approximately 1.85 meters (length) * 0.8 meters (width) * 1.7 meters (height);
3) There are 40000 casters at the bottom for easy mobility;
4) Power input: three-phase 380V, 100KVA;
3. Software functions
1) The software includes functions such as user management, scheme configuration, test point configuration, test project selection, equipment testing and setup, etc.
3) User management: includes two functions: password modification and super user management. Password modification allows any user to change their login password;
4) System interface requirements: The interface is divided into three parts: settings area, operation area, waveform display area, and test data display area.
5) Set parameters: including test item selection and test current selection; Test time setting, etc;
6) Operation area: including: closing button; Open button; Data storage;
7) Data display area: including: power on time t (S); Allowable energy I2t; Effective value of instantaneous tripping current of Ieff hotel; Effective value of the first half wave in the Ieff half instantaneous trip test; Effective value of current with long delay; Display the status of the circuit breaker switch at all times; The computer will display a test status prompt during the testing process, and an alarm will be triggered in case of any abnormalities;
8) Data storage: After completing a test, the results are automatically judged as qualified or unqualified. If you want to keep the test data, you can click the store button. At this time, a data dialogue button will pop up, requiring you to enter the product model, specifications, number, test date, and file number. The file number will be automatically generated. Click the store button to save it automatically. Can export numbers to a computer for printing; 3、 Test project parameters
1. Relay suction/release voltage test
1) When the measurement range is 0-30V DC (coil current ≤ 300mA), the resolution is 30/4096 (V)
2) Measurement error ± 1%+20mV
3) When measuring within the range of 30-120V DC (coil current ≤ 80mA), the resolution is 120/4096 (V)
4) Measurement error ± 1%+0.1V
5) AC measurement range 0-30V AC, (coil power ≤ 10W) resolution 30/4096 (V)
6) Measurement error ± 2%+100mV
7) When 0-120V AC, (coil power ≤ 10W) resolution 120/4096 (V)
8) Measurement error ± 2%+0.5V
9) When 0-300V AC, (coil power ≤ 10W) resolution 300/4096 (V)
10) Measurement error ± 2%+0.5V

2. Contact voltage drop (resistance) test
1) Measurement range 0-999m Ω at 6V 10 mA DC, measurement error ± 1% ± 1% m Ω
2) Measurement range 0-999m Ω at 6V 100mA DC, measurement error ± 1% ± 1 m Ω
3) Measurement range 0-500m Ω at 24VDC 1A, measurement error ± 1% ± 1% m Ω

3. Contact temperature rise test
1) Temperature measurement: 8-channel probe, measuring from room temperature to 200 degrees, temperature resolution of 0.1 degrees, 8-channel probe cyclic display;
2) Thermocouple model: T-type;

4. Electrical life test
1) Load voltage: AC 3 × 132V~264V adjustable
2) Load current: AC 3 × (0-150) A adjustable
3) Power on time: 1~999.9s
4) Power outage time: 1~999.9s
5) Test frequency: 1~times can be set
6) Working mode: cylinder driven

5. Mechanical life test
1) Connection time: 1~999.9s
2) Disconnecting time: 1~999.9s
3) Test frequency: 1~times can be set
4) Working mode: cylinder driven

6. Voltage withstand test between contacts in open circuit state
1) High voltage output: adjustable from 0 to 5KV
2) Leakage current: 0~30mA

7. Voltage withstand test between contacts and coils
1) High voltage output: adjustable from 0 to 5KV
2) Leakage current: 0~30mA

8. Relay coil resistance test
1) Measurement range 0-1000.000 Ω Measurement error ± 1% ± 1% m Ω

9. Voltage Range Test for Load Switch Operation of Electric Energy Meter

1) When measuring within the range of 0-30V DC,
2) Measurement error ± 1%+20mV
3) When 0-120V AC, (coil power ≤ 10W) resolution 0.1 (V)
4) Measurement error ± 2%+0.5V
5) When 0-300V AC, (coil power ≤ 10W) resolution 0.1 (V)
6) Measurement error ± 2%+0.5V

10. Contact resistance test of current circuit

1) Measure the DC 100A current used for measurement;
2) Measurement range: 1 μ Ω～ 4000 μ Ω;
3) Measure resistance with a resolution of 0.1 μ Ω;
4) Basic accuracy: ± 2%;
5) Measurement station: 1 independent station,
6) Measurement speed: 15 times/second;

11. Overload test
1) Test content: Able to test the tripping action time of 1.13In, 1.45In
2) Current fluctuation ≤ 2%
3) Adjustable current AC 0-150 A
4) Test time: 1~999999 seconds, resolution of 1 second;
5) Determination of upper limit time for delayed release: 1~999999 seconds;
6) Determination of lower limit time for delayed release: 1~999999 seconds;
7) Automatically determine whether the product's release time is qualified;