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Answer Posted / shivendu tiwari
ya my organisation is having the plc which is siemens S7-
200,S7-300,S7-400 honeywell loader 620-1200,loader620-3600.
plc is a device which is is based on digital electronic and
it logically performs the operation.
programme are written in ladder form which is uploaded in
the cpu of the plc and then the plc performs the operation.
ex- for controlling conveyer movement, for forge operation.
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A TRANSFORMER 440/400V,DELTA/STAR CONNECTED.THE NEUTRAL CONNECTED WITH GROUND CABLE THAT IS DIRECTLY CONNECTED TO THE PANEL,FROM PANEL IT IS CONNECTED EARTH PIT.IS IT RIGHT? IF IT IS RIGHT LEAKAGE CURRENT AFFECTED.SECONDATY IS PROTECTED WITH EARTH LEAKAGE RELAY.
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