MotorSeT Load Break Interrupter Switch 400 A, 5 kV – Instruction Bulletin PDF
PKR8059601

Operation

See also, Requirements for Installation, Operation, and Maintenance for additional information.

Load Break Interrupter Switch 400 A, 5 kV

The MotorSeT Load Break Interrupter Switch 400 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.

The load break interrupter switch has several built-in features:

  • 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 Off/Open position

  • Capability 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

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 the disconnector switch operator handle and rotate the handle counter-clockwise downward to the Off/Open position (shown in Handle Positions).

    Handle Positions

  3. Use the viewing window to view the disconnector switch and verify that the disconnector switch is in the Off/Open 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 (shown in Handle in Off/Open Position) .

    Handle in Off/Open Position

  2. Grasp disconnector switch operator handle and rotate the handle clockwise upward to the On/Closed position (shown in Switch Handle On/Closed Position).

    Switch Handle On/Closed Position

  3. Use the viewing window to view the disconnector switch and verify that the blades for all three phases are in the On/Closed position (shown in Switch Blades in Closed Position).

    Switch Blades in Closed Position

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

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