Slip-ring wound rotor three-phase asynchronous electric motor
37 - 300 kW | FLSB, LSLB Series LEROY SOMER

Power from 37 to 300 kW for the frame sizes taking values from 280 to 355 mm.
Voltage: 230 V Δ / 400 V Υ, 50 Hz (other voltages and frequencies on request).
Insulation class F, overheating B.
Standard version IP 55.

Performances:

Thanks to the insertion of an appropriate rheostat in the rotor circuit, the slip ring, wound rotor motor offers the following possibilities:
- adapting the motor torque to that of the driven machine;
- tolerant of long starts;
- limits the starting current;
- sets the speed of rotation with the aid of a permanent slip rheostat

Starting:
The slip ring, wound rotor motor does not depend on the stator being connected in order to start. A rheostat is used in order to start a motor.
Leroy-Somer recommends the liquid resistance rheostat known as the Polystart electrolytic starter.
This type of starter inserts a resistance into the rotor circuit, which gradually reduces until it disappears completely by a short-circuit at
the end of the starting period.