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How can you wire a 6-pole isolator to disconnect a 6-wire star delta motor away from the mcc and near to the motor?
Wiki User
∙ 9y ago
There is no need to place a 6 pole disconnect to isolate the motor in the field. The motor's leads at the motor's terminal box have to be wired for a delta connection. The star delta contactor in the MCC only has three wires on its output. Six wires do not have to be taken directly to the motor. The voltage is reduced at the start of the circuit when the starter in in the star configuration. From the star configuration it changes to the delta configuration. So as you can see only a three pole isolation switch is needed in the field to isolate the motor from its supply.
Wiki User
∙ 9y ago
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You can't. You need a 6 pole isolator
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it is called a delta
