difference between shunt coil and tripping coil
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Answer Posted / sai srinivas
The purpose of shunt coil is only for remote tripping
purpose. Shunt coil is winded coil. MCB can be tripped manually by pressing one plastic liver connected to contacts. If the MCB need to trip not for Over load or other faults, this shunt coil will be used. For example if fire occurs in AC plant room then to avoid spread of flame the AC plant must switched off automatically. Then this shunt coil is used. Shunt coil is connected to neutral and phase is connected via fire protection panel i.e phase wire from MV panel goes to fire panel and return back to shunt coil. Under normal condition the contacts in fire panel will ne Normally open, under fire condition, relay in fire plant acts and NO contacts becomes NC and supplies to shunt coil and pushes the MCB lever. then MCB trips which switches off supply. So trip the breaker from remote operation it will used. But Tripcoil is used to serve the purpose of tripping the breaker while current exceeds the certain limit(Due to overload or fault).This is the basic differece between shunt & trip coil.
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