What should I do if the low-voltage complete equipment suddenly trips during operation?

Release time:

2021-10-11

Author:

Source:

Abstract

Low-voltage complete equipment plays a role in switching, controlling, or protecting in power generation, transmission, distribution, energy conversion, and consumption. As a type of electrical equipment, if the device trips during operation, the entire circuit will short-circuit. So, what should we do if the device trips during operation? Please see the details below:

　　Low-voltage complete equipmentIt plays a role in switching, controlling, or protecting in power generation, transmission, distribution, energy conversion, and consumption. As a type of electrical equipment, if the device trips during operation, the entire circuit will short-circuit. So, what should we do if the device trips during operation? Please see the details below:

1. Determine the cause of the trip:

You can judge based on the relay card drop and alarm information. After the gas and temperature protection actions in the low-voltage complete equipment, there are corresponding indications of signal relay card drops. The overcurrent relay (GL type) cannot distinguish between overcurrent and instantaneous trip. In the timed protection circuit, overcurrent and instantaneous trip are protected by two (JL type) current relays respectively. When the relay operates, the red LED lights up, allowing for a clear determination of the cause of operation.

2. Handling methods:

(1) Due to line overload, the overcurrent relay causes the switch to trip. Before restoring power, negotiate with the user to reduce the load to prevent tripping again after power restoration.

(2) When an instantaneous trip occurs, check the busbar, transformer, and line. Before restoring power, locate and eliminate short-circuit fault points. Overcurrent and instantaneous trip protection can reset the relay after the switch trips, which can be distinguished from temperature and gas protection.

(3) In case of internal faults or overloads in transformers, gas and temperature protection actions occur. If internal faults in the transformer lead to heavy gas action, the transformer must be repaired. If a newly added fuel transformer has light gas action, it can continue operation after releasing internal gas. Temperature protection actions occur because the transformer temperature exceeds the set value. If the set value is correct, we must find ways to lower the transformer temperature; ventilation can reduce ambient temperature and also lower load and transformer temperature rise. If the set value is too low, it can be increased. Only by opening the temperature contact through the above methods can power be restored to the switch.

The causes of low-voltage complete equipment tripping are different, and so are their corresponding solutions. Therefore, when we find that equipment has tripped, we must carefully determine where the fault occurred and then take appropriate measures to resolve the issue.

 

Key words:

Previous:

How to maintain low-voltage complete equipment electrical cabinets?

Next:

How safe is the high-voltage cable branch box during use?

Recommended Reading

Chengyuan Electric and Siemens join forces to create a better future!

On October 23, 2024, at 2:00 PM, Chengyuan Electric successfully held a project communication and technical sharing meeting with Siemens in the first-floor exhibition hall of the factory. The purpose of this meeting was to strengthen cooperation and communication between both parties, promote innovation, and jointly advance the development of the smart electrical field.

2024-10-29

How to choose suitable box-type substations and cable branch boxes

In the power system, box substations and cable branch boxes play a crucial role and are widely used in various settings, such as industrial parks, residential areas, and commercial buildings. However, faced with a variety of models and specifications available in the market, how can one choose the box substation and cable branch box that best meet their needs?

2023-12-25

The role of cable junction boxes in automated control systems.

The cable branching box is one of the indispensable components in an automation control system, playing an important role in the system by enabling the branching and connection of cables, ensuring the normal operation of the entire system. This article introduces the function of the cable branching box and its significance in automation control systems.

2023-12-15

%E7%AC%AC%E4%B8%80%EF%BC%8C%E6%9C%80%EF%BC%8C%E4%BC%98%E7%A7%80%EF%BC%8C%E5%A2%9E%E5%BC%BA%EF%BC%8C%E4%B8%80%E6%B5%81%EF%BC%8C%E5%8D%93%E8%B6%8A%EF%BC%8C%E9%A2%86%E5%85%88%EF%BC%8C%E5%85%88%E8%BF%9B%EF%BC%8C%E5%BC%95%E9%A2%86

Sorry，当前栏目暂无内容!

您可以查看其他栏目或返回 首页

Sorry，The current column has no content!

You can view other columns or return Home