A.C. & D.C. Drives
Thyristor control stations for low-voltage induction motors
Application
Intended for soft starting of induction motors with starting current limitation to a preset value, braking, as well as for OFF – switching (protection) of the motors in case of incomplete phase operating conditions, short circuit currents, overloads, etc.
Starting is carried out as a function of the starting current limitation followed by starter shunting by a contactor; control stations ensure arc – free OFF – switching of the shunt contactor.
Design features
Control station consists of:
- input automatic circuit breaker;
- thyristor starter;
- shunt contactor;
- dynamic braking device;
- control panels of gate valve drives;
- special device for starter operation as a stand – by frequency converter;
- automation facilities according to Customer's specifications;
- additional switching devices.
Can be outfitted with a remote control panel (desk) per several control stations.
Main specifications
| Parameter name | Value |
|---|---|
| Rated voltage of power circuit, V | 380 |
| Frequency of supply mains, Hz | 50,60 |
| Power rating, kW | 10 ÷ 1000 |
| Ratio of permissible thyristor starter current overloads | 4 |
| Permissible duration of current overload, sec | 60 |
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