Common causes of diesel generator tripping and preventive measures

The reasons why a diesel generator suddenly trips may involve many aspects. Here are some common reasons:

1. Electrical failure

Wire short circuit: Two points in a circuit with different potentials are mistakenly connected together, causing a sudden increase in current, which triggers a protection mechanism and trips the generator.

Poor contact: The electrical connection part is loose or corroded, resulting in increased resistance and unstable current, which may cause tripping.

Faulty circuit breaker: A problem with the circuit breaker itself that prevents it from functioning properly may also cause the generator to trip.

Damage to the internal electrical components of the generator: For example, damage to the stator winding, rotor and other components will affect the normal operation of the generator and cause tripping.

2. Overload

When a generator is loaded beyond its rated capacity, the current will increase, potentially causing overheating of wires or damage to electrical components. To avoid this, the overload protection device activates a tripping mechanism to relieve the load and protect the generator. For example, a generator with a maximum standby power of 220KW. If the power of the driven equipment is too large and a sudden increase of 230KW is used, it may cause the generator to run unstable, increase the temperature, and eventually cause a trip.

3. Mechanical failure

Bearing damage: The bearing is an important component of the generator. If it is damaged, it will cause the generator to run unstable and trigger a trip.

Stator winding overheating: Due to poor heat dissipation or excessive current, the stator winding may overheat, causing tripping.

Failure of other mechanical components: Failure of components such as gears and belts may also affect the normal operation of the generator and cause tripping.

4. Fuel problem

Insufficient fuel supply: Due to fuel pump failure, clogged fuel lines, or clogged fuel filters, the generator may not receive enough fuel, resulting in unstable operation or shutdown, causing a trip.

Poor fuel quality: The use of substandard fuel will affect the combustion efficiency of the generator and even cause engine failure, resulting in tripping.

Precautions

In order to reduce the occurrence of diesel generator tripping, regular generator maintenance and inspections are required to ensure the normal operation of the electrical system and mechanical components. Arrange the load reasonably to avoid overload operation of the generator. Use high-quality fuel and replace fuel filters regularly. Ensure the safety and cleanliness of the environment around the generator to prevent interference from external factors.

To sum up, there are many reasons for sudden tripping of diesel generators, involving electrical, mechanical, fuel, external factors and other aspects. By taking corresponding preventive measures and handling faults in a timely manner, the risk of generator tripping can be reduced and its stable and reliable operation can be ensured.