Analysis of Phase Loss Causes for Cummins Diesel Generator Sets

The reason for the phase loss of the Cummins diesel generator set is that the power supply line does not supply the three-phase voltage to the motor at the same time, usually the contactor or circuit breaker, and then the line is disconnected, the rotation is weak, and it just buzzes and heats up instantly when it is overloaded. If the power is not cut off in time, the motor will be burned.

For a three-phase asynchronous motor, the normal operation should be that the three-phase symmetrical alternating current flows into the three-phase symmetrical stator winding to generate a circular rotating magnetic field, and when the three-phase current is missing one phase. There will be abnormal operation of the motor. The reasons for the lack of phase failure of the motor mainly include the following situations.

1. The power supply phase is missing, the power supply phase is missing, that is, the power input to the motor is out of phase. The reasons for this type of fault are generally the phase loss of the fuse or automatic circuit breaker, the phase loss of the AC contactor, the phase loss of the thermal relay, the phase loss of the terminal, or It's a line break. It is very simple to judge this kind of fault. It only needs to measure the input end of the motor with the voltage gear when the circuit is connected. If the voltage of any three-phase measurement results is seriously insufficient, it can be determined that it is such a fault.

2. Motor phase loss, motor phase loss is due to motor overheating, or bearing damage, loose joints, mechanical trauma, terminal breakage, etc. to judge such faults, the three-phase windings of the motor can be judged by the electrical barrier of the multimeter. Measurement, if the three-phase balance is not a phase loss, if there is a phase or two-phase open circuit, it can be judged that the motor phase is missing.

Jiangsu Starlight Power Generation Equipment Co., Ltd. was founded in 1974 and is one of the earliest manufacturers of generators and diesel generator sets in China. The company has a registered capital of 218.88 million yuan. The company covers an area of 86,000 square meters and a building area of 55,000 square meters. There are more than 660 employees, including 456 professional technicians and 106 senior technicians. It has 46 sales and service outlets nationwide. The main products are diesel engines, generator sets, and diesel generators, providing users with a one-stop service of design, supply, debugging and maintenance at any time. Starlight has always insisted on using first-class talents, building first-class enterprises, manufacturing first-class products, creating first-class services, and making every effort to build a first-class domestic enterprise. If any question please feel free to visit our website https://www.dieselgeneratortech.com/ or send email to sales@dieselgeneratortech.com.