Motor starting reactors are used to reduce the voltage during starting up of large 3 phase motors while at the same time limiting inrush currents.
Large motors generally draw 6-8 times more current than their nominal current from the grid. They are typically started with 70% of voltage and the rest of the voltage, while the other 30%, is dispersed across the motor starting reactor. After 15 - 20 seconds, the reactor is bypassed by contactors in the system.
Advantages
- Perfect mechanical strength to withstand high short-circuit forces
- Limited temperature rise enables longer lifespan
- Maintenance-free design
