How To Solve The Problem Of Box Softening

How to solve the problem of box softening

Soft fault of switch contacts in high and low voltage switchgear

Poor contact between the switch contacts and fuse contacts of the high and low voltage switchgear inside the casing of the box transformer is one of the "nightmare" soft faults of the box transformer. The fuses and various switches inside the high-voltage switchgear inside the box type substation are mechanical, automatic, and frequently used electrical components. After frequent use, these electrical components may experience misalignment, contact stains, or reduced tin content in the contacts, resulting in poor contact of the components.

This type of soft fault is extremely troublesome and difficult to handle, and the workload of maintenance is large. However, when such a soft fault occurs, it must be addressed. The treatment method is to separate and observe the internal component contacts of the switchgear one by one. If there are stains, wipe them with insulation solution in a timely manner. If the contacts become thinner, tin plating treatment should be carried out in a timely manner. If the contacts are found to be misaligned, use an insulation rod to adjust them in a timely manner Of course, these operating methods must be carried out in the event of a power outage.

Soft fault between transmission line and equipment connection point

Soft faults can also occur at the connection points between transmission lines and equipment. The reason for this type of fault is usually due to the internal equipment of the box transformer being subjected to long-term high-voltage loads, which greatly exceeds the rated power of the transmission equipment. This causes a slight melting phenomenon inside the line, resulting in a large amount of heat generated at the contact points between the box transformer equipment and the transmission line, making the contact between the two electrical components not very close.

If this situation occurs, the only solution is to replace the transmission lines between the equipment, install intelligent modules for the equipment, and timely control the input current and voltage of the equipment to ensure stable operation of the substation equipment.

In summary, poor contact of contacts is one of the main causes of box transformer softening faults, mostly caused by current or voltage imbalance between electrical components. This phenomenon is a very subtle change that is difficult to detect with the naked eye at present, and often affects the normal operation of the box transformer. The soft failure of the box transformer casing that power maintenance personnel are extremely afraid of can be completely addressed and resolved with careful and meticulous handling. Careful observation and detailed handling are the key to solving the box transformer failure.

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