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Debug method of DC screen

The debug method of the DC screen:

1, first check whether the wiring of primary and secondary circuits is correct. It's mainly about checking fatal errors, for example, if the weak interface is connected to the strong electricity, it should connect to the DC signal, but access the AC signal, and the short circuit problem also exists.

2, avoid the above reasons, disconnect all circuit breakers and insurance, connect the AC power, test whether the AC double power switching device works normally, and whether the outlet voltage of the dual power switching device is normal.

3. After the exchange part test is normal, the AC switch of the charging module is closed in order to observe whether the module is normally started and measured the output voltage and polarity of the module.

4, when the charging module starts normal, and the output voltage and polarity are correct, then connect the battery switch and the bus switch, and measure whether the battery outlet switch, the parent and the parent voltage and polarity are correct, and observe whether the voltmeter is in the direction of overturn.

5, a switch is switched on to measure the correctness of the terminal voltage and voltage polarity corresponding to the feed out switch.

6, the above content is the debugging of the primary circuit. After the above steps are measured and debugged, the monitoring power supply is connected.

7. After monitoring the power supply, observe and monitor whether the display is normal and whether each detection module works normally.

8, monitor the power is normal, first check the alarm monitoring information on the display, if the alarm information, according to the problems, such as not to find relevant alarm information, check the voltage monitoring device display value, current load value, switching information etc..

9, after monitoring and testing the main analog and switch information, the insulation alarm and branch grounding resistance of the DC busbar are tested. The general 220V system can be tested by 25-100K resistance, and the 110V system can be tested with 7-100K.

10, battery inspection test, the best way of the battery will provide access to the battery inspection, testing the overall performance, such as site conditions is not enough, can take a single battery in the test.

So far, after debugging, the rest is to check the installation and fastening of the components, the loosening of the wires and components and the technical problems.