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Answer Posted / sankar maiti
VFD Variable Frequency drive. Frequency change also will be
change speed . analog input supply 4- 20 ma through plc to
be change speed and out commend 4-20 ma swing in your scada
on your pc.start stop comment through digital comment.start
to out side the field.
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i m electrical diploma holder i want to do plc $ Scada some body tell me which insitute is best for me near chandigarh
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ii) A shunt motor supplied at 230V, runs at 900 rpm when the current is 30A. The resistance of the armature is 0.4 ohms. Calculate the resistance required in series with the armature to reduce the speed to 600 rpm, assuming that the armature current is then 20A. [12]
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