Why does the transformer trip when power is supplied?

In the power system, the transformer is an important power equipment that connects the power grid and users. Transformers can transport high-voltage power to low-voltage receiving ends to realize power transmission and distribution. However, transformers sometimes experience abnormalities, such as "tripping when power is supplied". If the transformer trips or fails during the power transmission process, it will cause a power outage of the entire system and bring a lot of inconvenience to people's production and life. So, what is the reason that causes the transformer to trip when power is supplied? Next, let’s discuss it in detail.

1. Overload

Overload of the transformer is one of the main reasons for tripping during power transmission. Overload refers to the phenomenon that the output power of the transformer exceeds its rated power. When the transformer is overloaded for a long time, it will cause the equipment to overheat and cause damage. There are many reasons for transformer overload, such as transformer capacity is too small, load is too heavy, load distribution is uneven and other factors.

2. Short circuit

Short circuit is also one of the common reasons for tripping when power is supplied. A short circuit refers to a phenomenon where an abnormality occurs on a circuit and causes a sudden increase in current. When the transformer operates in a short-circuit state, the current at the output end will suddenly become larger than the rated current. This can cause the transformer to be overloaded, causing it to trip as soon as power is supplied.

3. Leakage

Leakage of the transformer is also one of the reasons that causes the transformer to trip when power is sent. Leakage refers to the abnormality of electrical equipment showing insufficient insulation capabilities. When the insulation capacity of the transformer is insufficient, there will be current leakage at the output end, resulting in a decrease in its output power. In the case of severe leakage, the transformer will be damaged, causing it to trip when power is transmitted.

4. Wiring errors

Transformer wiring errors are one of the common causes. This may occur at the interface or termination of the backbone cable during equipment installation. When using new power wiring methods, it is also easy to make wiring errors. In this case, the phenomenon is usually signal obstruction or equipment failure.

5. Electrical breakdown

Electrical breakdown is also one of the causes of tripping when power is supplied. Electrical breakdown refers to the phenomenon of discharge when the electric field intensity exceeds the withstand voltage of the insulating material. This phenomenon usually occurs when the transformer shell is grounded or the insulator is damaged. Electrical breakdown can cause damage to the insulation material, causing significant transformer failure.

6. Internal problems of the transformer

Internal problems of the transformer are also one of the reasons for tripping when power is supplied. Problems may occur in the electrical or mechanical parts of the transformer, such as thermal runaway, equipment damage, component damage, etc. In this case, the device often exhibits various abnormalities.

In summary, the reason why the transformer trips when power is supplied may be the result of a variety of composite factors. In order to prevent equipment failure, regular inspections and maintenance must be carried out to ensure that the equipment is in normal working condition and to avoid unreliable power supply due to equipment aging and damage, which brings risks to people's lives and work.