Introduction To the Safe Operation Of High And Low Voltage Switchgear
03-22 2025 | By:
Introduction to the safe operation of high and low voltage switchgear
What is the safe operation process of high and low voltage switchgear? Next, the editor will introduce it in detail.
1. When working in all or part of the energized panels, the maintenance equipment should be separated from the operating equipment with obvious signs.
2. The secondary windings of current transformers and voltage transformers should have permanent and reliable grounding protection.
3. When working on the secondary circuit of the operating current transformer, the following safety precautions should be taken:
3.1 It is forbidden to disconnect the current circuit.
3.2 In order to reliably short-circuit the secondary coil of the current transformer, the high-voltage switchgear must use short-circuit plates and short-circuit lines, and it is strictly forbidden to use wire winding.
3.3 It is forbidden to carry out any work on the circuit and wire between the current transformer and the short-circuit terminal.
4. When working on the secondary circuit of the operating voltage transformer, the following safety precautions should be taken:
4.1 Strictly avoid short circuit or grounding.
4.2 Use insulating tools and wear insulating gloves. If necessary, stop using related relay protection equipment before work.
4.3 When connecting temporary loads, special switches and circuit breakers must be equipped.
4.4 When the secondary circuit is plugged in for testing, in order to prevent the secondary side from reversely connecting the primary circuit, in addition to disconnecting the secondary circuit, the secondary circuit breaker should also be selected.
4.5 Before the secondary circuit is plugged in or the AC withstand voltage test is carried out, the maintenance worker and relevant personnel should be notified, and someone should be sent to guard the site, check the circuit, and make sure that no one is working before charging.
4.6 Check the power supply maintenance and the secondary circuit working personnel. It is forbidden to carry out any switching operation without the approval of the staff.
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