How to test the DC screen and the debugging method of the DC screen

Serial No. Test Item Test Standard Measured Record.

1 Uniform charge voltage adjustment experiment 253 V 253

2 Float Charge Voltage Adjustment Experiment 243 V 243

3 Evenly charged to floating charging current Press that is, A

4 Float charge to average charge current Press that is, A

5 Forced transfer float charge time 3 h 3

6 Module efficiency experiment 90% 90

7 Ripple coefficient experiment

8. Steady flow accuracy experiment

9. Voltage regulation accuracy experiment

10 Dielectric Strength Test DC to Ground 10m 10m11 Short Circuit Test Module DC Short Circuit Protection Normal.

12 Bus insulation experiment 25k reported insulation faults are normal.

13 The screen display and signage instructions are clear, accurate and accurate.

14 The control loop action test is correct and correct.

15 The test of protection and alarm function is correct and correct.

16 Battery pack capacity experiment Discharge by hour, and the single battery is not lower than the battery termination low voltage V is correct.

17 Flash test: normal flash, none.

18 The silicon chain test operates normally and correctly.

19 Battery inspection function test Overlimit alarm None.

20 Branch insulation test 25k reports leakage branch and resistance value None.

21. The appearance and color of the cabinet meet the requirements of customers.

1. First of all, check whether the wiring of the primary and secondary circuits is correct - mainly to check the fatal error, such as the weak current interface is connected to the strong current, the DC signal should be connected but the AC signal is connected, and there is the short circuit problem.

2. To avoid the above reasons, disconnect all circuit breakers and fuses, turn on the AC power supply, and test whether the AC dual power switching device is working normally, and whether the lower voltage of the dual power switching device is normal.

3. After the AC part is tested normally, close the AC switch of the charging module in turn, observe whether the module starts normally and measure the output voltage and polarity of the module.

4. After the charging module starts normally and the output voltage and polarity are correct, turn on the battery pack switch and each bus switch, measure whether the voltage and polarity of the lower port, mother closure and control mother of the battery pack switch are correct, and observe whether the voltmeter is overturned in the direction.

5. Turn on the feedout switch at one time, and measure whether the terminal voltage and voltage polarity corresponding to the feedout switch are correct.

6. The above content is the debugging of a loop, and after the measurement and debugging of the above steps is completed, the monitoring power supply is turned on.

7. After the monitoring is powered on, observe whether the monitoring display is normal and whether each detection module is working normally.

8. After the monitoring device is powered on normally, first check the alarm information on the monitoring display, if there is alarm information, then find the relevant problems according to the alarm information, if not, then check the voltage value displayed by the monitoring device, the current value of the load with the load, the switching information, etc.

9. After the main analog and switching information on the monitoring is checked and tested normally, the insulation alarm of the DC bus and the grounding resistance of the branch are started, and the general 220V system can be tested with 25-100K resistance, and the 110V system can be tested with 7-100K.

10. Battery inspection test, it is best to connect the batteries with the specified number of channels to the battery inspection to test the overall performance, if the site conditions are not enough, you can take a single battery to test in turn.

At this point, after the commissioning is completed, all that remains is to check the installation and fastening of the components, whether the wires and components are loose and process problems.