Notes when using low-voltage power distribution cabinet
Jun 10, 2021
The low-voltage power distribution cabinet is also the low-voltage switch cabinet. The following points should be noted during operation:
1. When working on fully and partially charged disks, the maintenance equipment and operating equipment should be separated by obvious signs.
2. The secondary windings with current transformers and voltage transformers should have permanent and reliable protective grounding.
3. When working on the secondary circuit of the current transformer in operation, the following safety measures should be taken:
a. It is strictly forbidden to disconnect the current loop.
b. In order to reliably short-circuit the secondary coil of the current transformer, short-circuit strips and short-circuit wires must be used, and wire winding is prohibited.
c. It is forbidden to carry out any work on the circuit and wires between the current transformer and the short-circuit terminal.
4. When working on the secondary circuit of a voltage transformer in operation, the following safety measures should be taken:
a. Strictly prevent short circuit or grounding.
b. Insulated tools and insulated gloves should be used, and the relevant relay protection devices should be disabled before work if necessary.
c. When connecting temporary loads, special switches and fuses must be installed.
d. During the energization test of the secondary circuit, in order to prevent reverse voltage transformation from the secondary side to the primary, in addition to disconnecting the secondary circuit, the primary fuse should also be removed.
e. Before the secondary circuit is energized or withstand voltage test, the attendant and relevant personnel should be notified, and someone should be sent to guard the scene, check the circuit, and confirm that no one is working before pressurizing.
f. The staff who inspect the power-off protection and the secondary circuit are not allowed to perform any switching operations without the permission of the personnel on duty.
