Motor Starter Protection - Electrical Sector

161 2005 Cooper BussmannMotor Starter ProtectionMotor controllers are highly susceptible to damage due to short circuits. Evenfor moderate or low-level faults, extensive damage may occur if the short circuit protective device is not carefully selected. The most vulnerable partsare the Starter contacts and heater elements. Fault currents can weld the contacts and cause the heater elements to vaporize or be critically metalized vapors from such damage then can initiate further starterdestruction in the , after a fault, no apparent damage is visible ( , the contacts are notwelded and the heater elements are not burnt up). However, the heat energyfrom the fault may have caused too high of a heat excursion for the heaterelements or overload relay sensing element to withstand, with the result beinga permanently altered and degradated level of overload question is, what can be done to obtain the highest degree of short circuitprotection for Motor controllers?

©2005 Cooper Bussmann 161 Motor Starter Protection Motor controllers are highly susceptible to damage due to short circuits. Even for moderate or low-level faults, extensive damage may occur if the short

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  Protection, Motor, Starter, Motor starter protection, Motor starter protection motor

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