What are the points for attention in the power transmission process of high and low voltage distribution cabinets?
power transmission
1) After passing the inspection by the power supply department, the power supply will be sent into the building, and it will be verified by electricity inspection and phase calibration.
2) The installation unit turns on the switch of the wiring cabinet, and checks whether the three-phase voltage of the voltmeter on the PT cabinet is normal.
3) Switch on the transformer cabinet and check whether the transformer has electricity.
4) Close the incoming switch of the low-voltage cabinet and check whether the voltage of the three-phase voltmeter is normal.
5) Power transmission in the above order.
6) In the low-voltage connection cabinet, in-phase check shall be conducted on the upper and lower sides of the switch (switch is not closed). Use a voltmeter or multimeter to set the voltage to 500V, and use a net probe of the meter to contact the same phase of the two circuits respectively. At this time, the voltmeter has no reading, indicating that the two circuits are in the same phase. Check the other two phases in the same way.