DC power screen debugging method
1. First check whether the wiring of the primary and secondary circuits is correct - mainly to check for fatal errors, for example, the weak current interface is connected to a strong current, it should be connected to a DC signal but it is connected to an AC signal, and there is a short circuit problem.
2. To avoid the above reasons, disconnect all circuit breakers and insurance, connect the AC power supply, and test whether the AC dual power switching device is working normally, and whether the lower port voltage of the dual power switching device is normal.
3. After the test of the AC part is normal, close the AC switch of the charging module in turn to 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 busbar switch, measure whether the voltage and polarity of the lower port of the battery pack switch, the closing busbar, and the control busbar are correct, and observe whether the voltmeter is The direction is overturned.
5. Turn on the feed-out switch once, and measure whether the terminal voltage and voltage polarity corresponding to the feed-out switch are correct.
6. The above content is the debugging of the primary circuit. After the above steps are measured and debugged, turn on the monitoring power supply.
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 an alarm information, then search for related problems according to the alarm information. If not, check the voltage value displayed by the monitoring device, the current value of the load, and the switch Quantitative information, etc.
9. After checking and testing the main analog and switch information on the monitor, start to test the insulation alarm of the DC bus and the grounding resistance of the branch circuit. Generally, 220V systems can be tested with 25-100K resistors, and 110V systems can be tested with 7- 100K tests.
10. For the battery inspection test, it is best to connect the specified number of batteries 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 sequence.
So far, the debugging is completed, and the rest is to check whether the components are installed tightly, whether the wires and components are loose, and whether there are process problems.
