PKR8059501

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.

NOTE: Once the springs are moved off-center and released, the operator cannot control the opening or closing operation. As a result, the mechanism provides a fault closing and rated load break feature independent of the speed of the operating handle movement.

In addition, the load break interrupter switch has several built-in features to reduce hazards and to provide proper operating sequences:

  • A door interlock that blocks opening the enclosure's front door while the switch is in the closed position

  • A switch interlock that blocks manual operation of the handle mechanism while the door is open

  • A viewing window to view each switch contact position

  • Capability for padlocking the switch in the open position

  • Capabilities for padlocking the door handles closed

  • Mechanical indicators showing whether the switch is open or closed

  • Key interlocks (when provided) force a sequence of operation

Disconnector Switch Operation

NOTICE
Mechanism Jam and Damage
  • Before rotating the operating handle, the handle latch button must be pulled out to its maximum.
Failure to follow these instructions can result in equipment damage.

Handle Latch Button Positions

Legend — Handle Latch Button Positions

Call-out

Description

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:

  1. If the controller is supplying power to the motor, press the Stop button on the control panel to remove power to the motor.

  2. Grasp and pull the handle latch button out all the way to its maximum extend (“Out” position) and hold it in this position.

  3. 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.

    Handle in ON Position

  4. Release the handle latch button, and using a smooth, continuous motion firmly pull the switch operating handle downward until it stops.

  5. Once the switch handle is completely down, the handle latch button will reset to its original position.

  6. 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.

    Handle in OFF Position

DANGER
hazard of electric shock, explosion, or arc flash
  • After operating disconnect switch to the open position, always look through the viewing window and verify all main and arc interrupter blades are fully open.
  • Do not work on or in this equipment or on down stream equipment if any of the main or arc interrupter blades remain closed after the switch is opened. Contact Schneider Electric if blades remain closed.
  • Perform inspection and preventative maintenance on disconnect switch at a minimum of once each year.
Failure to follow these instructions will result in death or serious injury.

Closing the Disconnector Switch

To close the disconnector switch, follow these steps:

  1. Use the viewing window to view the disconnector switch and verify that the disconnector switch is in the Off/Open position.

    Handle in OFF Position

  2. Grasp and pull the handle latch button out all the way to its maximum extent (“Out” position) and hold it in this position.

  3. 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.

  4. Release the handle latch button, and using a smooth and continuous motion, firmly pull the switch operating handle upward until it stops.

    Handle in ON Position

  5. Once the handle is completely up, the handle latch button will reset to its original position.

  6. 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.

QR Code is a registered trademark of DENSO WAVE INCORPORATED in Japan and other countries.

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