![]() ![]() Switch on three phase supply and give either close or open command.( External interlocks may have to be temporarily bypassed however, all interlock internal to the isolator mechanism should be in the circuit.) Observe the direction of isolator operation.With the only, the control supply on, give open/close commands and check that proper contactor energize for the commands are given ( e.g close command cause the close contactor to energize).External interlocks may have to be temporarily bypassed however all interlock internal to the isolator mechanism should be in the circuit. Bring the isolator in an intermediate, switch off the three phase supply.Check the setting of the overload relay with respect to the full load current of the motor.Check the insulation resistance of the motor with a low voltage insulation tester.Manually operate the isolator to check the operation of the mechanical limit switch and proper alignment of main contacts.To check the operation of a motorized isolator, the following steps are to be followed:.For a motorized isolator closing & opening is normally controlled by ‘close’, ‘open’ contactors which are activated by commands from local switches or from remote.The nameplate details of an isolator consists of rated current, rated voltage, short circuit current rating, the auxiliary voltage required for operation etc.Operation of isolators can be motorized or manually operated. Isolators can be of the following types. ![]() For your reference, please find below the step by step process of commissioning of isolators: Some of the important guidelines to be followed before energizing the isolators and earthing switches. ![]()
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