Saturday 26 March 2011

Testing of conveyor & agitator

On 24th march 2011 we tested conveyor and agitator by changing the contacts manually means without command from slave PLC.   Steps are given below for our existing plant:

1.We traced out the proper wiring ,which MCB(Miniature circuit Breaker) is connected through contactor circuit .Wiring diagram will be soon displyed.
2.  3 cables from the motor are connected to contactor n contactor also got connected to cables from R2 ralay and NO ,NC contacts are 11 & 14 in our panel..
3.contactor has supply from the source through MCB.when operator gives command,command from realys comes to contactor and contacts cganged means star to delta & supply get connected to motor/agitator.This is the logic behind wiring diagram
4.This will more understand when we will disply the wiring diagram of our panel.
conveyor motor was 3 phase,so we have to check safety aspects while working in plants.

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