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In the motors starting purpose why the armature rheostats at maximum position while the field rheostat is kept in minimum position?

PLC SCADA Controls Electrical Maintenance
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Question added by maha ahmed sayed elayat , تدريب , شركه سيمنز
Date Posted: 2013/10/23
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حسام ناجى
by حسام ناجى , testing and commissioning engineer II , SENDAN INTERNATIONAL COMPANY

In the time of starting a motor the field rheostat is kept in minimum state for the high starting torque.In the time of starting a motor the armature rheostats is used to control or reduce the high starting current. This high starting current can damage the motors starting systems.

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