Operation
See also, Requirements for Installation, Operation, and Maintenance for additional information.
Load Break Interrupter Switch 600–1200 A
The MotorSeT Load Break Interrupter Switch 600–1200 A, 5 kV has spring mechanisms that provide quick “make” (rated fault closing) and quick “break” (rated load interruption) operation.
As the operator handle is rotated, the charged spring is driven off-center and releases its energy, thereby rotating the operating shaft. The switch blades will not move, in either a closing or opening direction, until the main spring causes rotation of the operating shaft.
In addition, the load break interrupter switch has several built-in features to reduce hazards and to provide proper operating sequences:
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A door interlock that blocks opening the enclosure's front door while the switch is in the closed position
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A switch interlock that blocks manual operation of the handle mechanism while the door is open
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A viewing window to view each switch contact position
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Capability for padlocking the switch in the open position
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Capabilities for padlocking the door handles closed
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Mechanical indicators showing whether the switch is open or closed
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Key interlocks (when provided) force a sequence of operation
Disconnector Switch Operation
NOTICE |
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Mechanism Jam and Damage
Failure to follow these instructions can result in equipment damage.
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Legend — Handle Latch Button Positions
Call-out |
Description |
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A |
Handle latch button pushed in (“In position”) |
B |
Handle latch button pulled out to its maximum (“Out position”) |
Opening the Disconnector Switch
To open the disconnector switch, follow these steps:
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If the controller is supplying power to the motor, press the Stop button on the control panel to remove power to the motor.
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Grasp and pull the handle latch button out all the way to its maximum extend (“Out” position) and hold it in this position.
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While holding the handle latch button in its “Out” position, rotate the switch operating handle downward approximately 15° or until a resistive force is felt in the handle.
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Release the handle latch button, and using a smooth, continuous motion firmly pull the switch operating handle downward until it stops.
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Once the switch handle is completely down, the handle latch button will reset to its original position.
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Use the viewing window to view the disconnector switch and verify that the disconnector switch handle is in the Off/Open position and the switch blades are in the Open position.
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hazard of electric shock, explosion, or arc flash
Failure to follow these instructions will result in death or serious injury.
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Closing the Disconnector Switch
To close the disconnector switch, follow these steps:
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Use the viewing window to view the disconnector switch and verify that the disconnector switch is in the Off/Open position.
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Grasp and pull the handle latch button out all the way to its maximum extent (“Out” position) and hold it in this position.
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While holding the handle latch in its “Out” position, rotate the switch operating handle upward approximately 15° or until a resistive force is felt in the handle.
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Release the handle latch button, and using a smooth and continuous motion, firmly pull the switch operating handle upward until it stops.
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Once the handle is completely up, the handle latch button will reset to its original position.
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Use the viewing window to view the disconnector switch and verify that the disconnect switch handle is in the On/Closed position and the switch blades are in the Closed position.