After the selection of the inverter, it is necessary to consider configuring other peripheral equipment according to the actual situation of the site. The peripheral equipment that the inverter can select mainly includes circuit breakers, reactors, contactors, brake resistors, etc.
1. Circuit breaker
The circuit breaker can easily control the de-energization and closing of the circuit. It is mainly used to automatically disconnect the power supply when the inverter system is out of the reverse current, overcurrent, short circuit and undervoltage, play an isolation role, and maintain the power supply.
2. Electrical scrambler
The reactor is a peripheral device often used for frequency conversion selection. When the interval between the frequency conversion equipment and the motor is too long, or the interval between the frequency conversion equipment and the power supply is too close, in order to improve the power factor and minimize the inrush current in the input, it is necessary to add a DC reactor or AC reactor in the selection process of the frequency conversion equipment.
3. Contactor
Contactors are divided into input contactors and output contactors. When a component of the frequency conversion system has a problem, the power supply is automatically cut off to avoid connecting the burned equipment at a distance interval.
4. Braking resistance
When general frequency conversion equipment is applied to inertial loads such as CNC machine tools and lifts, the selection of frequency conversion equipment requires the use of braking resistors to consume the excess energy generated in the frequency conversion system.