DC screen positive or negative one-point grounding should be how to deal with

DC screen grounding alarm is the cause of DC power supply positive or negative grounding, to find the grounding point can eliminate the alarm. Grounding DC screen and high-voltage cabinets may be grounded, you can all the way all the way to remove the DC screen output circuit, turn off the DC output which is not grounded after the alarm when the alarm indicates that it is all the way to ground. All outputs are tried or reported ground faults, then the DC screen is the internal control mother grounded!

Precautions when there is a grounding alarm can not let the power supply positive and negative or other power a piece of grounding. This may form a short circuit.

According to the mode of operation, operation, climate impact to determine the possible grounding of the premises, the use of pulling the road to find, segmentation method, to the first signaling and lighting part of the operating part, the first part of the outdoor part of the indoor part of the principle. When cutting off the special DC circuit, the cut-off time shall not exceed 3 seconds, regardless of whether the circuit is grounded or not should be closed.

The precautions for finding DC grounding are as follows:

(1), find grounding prohibit the use of light bulbs to find the method;

(2), when checking with a meter, the internal resistance of the meter used should not be less than 2000 Ω/V;

(3), when the DC grounding occurs, it is prohibited to work on the secondary circuit;

(4), when processing Shall not cause DC short circuit and another point of grounding;

(5), find and deal with must be carried out by two people at the same time;

(6), before pulling the road should take the necessary measures to prevent direct loss of power may cause the protection and automatic devices of the false action.