what is electricial and mechnical interlock.
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Answer Posted / suresh m s
Dear All
Electrical Interlock means=Suppose you have 3 breakers EB
DG and Bus coupler breaker(not only breaker ,MCCB and
contactors also)in that condition only one source should On
i.e either EB and Buscoupler or DG and buscoupler so for
this we are using NO And NC contacts in series with closing
circuit ie in EB clsoing circuit DG NC contacts are using
so that if DG breaker ON the contacts wil open and doesnot
allow voltages to EB closing ckt same for DG circuit.
Mechanical Interlock= Means mechanical locks provided with
three locks and two keys system so that any one source can
clsoe at a time
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