From the Southern Airlines' major explosion accident to see the alarm bells for operators of high and low voltage switchgear in high-risk environments


Release time:

2023-04-19

As soon as I opened the browser of my computer this morning, I saw a shocking news that at 3:54 pm yesterday, a laboratory explosion occurred in the Jiangjun Road campus of Nanjing University of Aeronautics and Astronautics, killing a total of 2 people and injuring 9 people. It is a technical university. The explosion should elicit a repetition from leaders and universities, with or without casualties, raising alarm bells for those working in high-risk environments and areas. Human life is only once, we must cherish our own life and protect our own life!

China Southern Airlines deflagration site map

As soon as I opened the browser of my computer this morning, I saw a shocking news that at 3:54 pm yesterday, a laboratory explosion occurred in the Jiangjun Road campus of Nanjing University of Aeronautics and Astronautics, killing a total of 2 people and injuring 9 people. It is a technical university. The explosion should elicit a repetition from leaders and universities, with or without casualties, raising alarm bells for those working in high-risk environments and areas. Human life is only once, we must cherish our own life and protect our own life!

Derun Electric high voltage cabinet on-site operation

Through this explosive news, I think of the high and low voltage electrical equipment produced by our company, these equipment are also used in dangerous environments, a improper operation, will cause casualties and economic losses. Therefore, I hope that colleagues or electrical engineers must pay attention to safety in their work, and must do pre-job safety training before starting work. Below I will briefly introduce what details to pay attention to when operating high and low voltage switchgear:

1. Work on all and part of the live disk, and the maintenance equipment and the operating equipment should be separated by obvious signs.

2. The secondary windings of 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:

3.1 It is strictly forbidden to disconnect the current loop.

3.2 In order to reliably short-circuit the secondary coil of the current transformer, a short circuit sheet and a short circuit must be used, and it is forbidden to use wire winding.

3.3 It is forbidden to carry out any work on the loops and wires between the current transformer and the short-circuit terminal.

4. When working on the secondary circuit of the voltage transformer in operation, the following safety measures should be taken:

4.1 Strictly prevent short circuit or grounding.

4.2 Insulating tools should be used, insulating gloves should be worn, and the relevant relay protection devices should be stopped before work if necessary.

4.3 When connecting temporary load, special switches and fuses must be installed.

4.4 When the secondary circuit is energized test, in order to prevent the primary reverse transformation from the secondary side, in addition to disconnecting the secondary circuit, the next fuse should be removed.

4.5 Before the secondary circuit is energized or withstand voltage test, the duty officer 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 pressurization.

4.6 The staff who check the power failure protection and the secondary circuit are not allowed to carry out any reverse operation without the permission of the personnel on duty.

PassDerun ElectricXiaobian for the above sharing, in the operation of the real-time adjustment according to different status quo, so as to work in strict accordance with the formal operation process, must be vigilant, cherish life.