Fault states and fault detection on the 3KC3 transfer switching equipment

Fault state

Procedure for fault rectification

The transfer switching equipment does not react to electrical commands (does not transfer).

  • Check that the power supply inputs of terminals 101, 102 and 201, 202 (176 to 288 V AC) are connected.

  • Check that the cover of the transfer switching equipment is closed. Only then the transfer switching equipment is in remote mode.

  • Check that at least one of the switching commands (313, 314 or 315) is connected to common control terminal 317.

  • Check that only one of the switching commands I (315) and II (314) is connected to common control terminal 317 at the same time.

  • If the transfer switching equipment does not react, it can be reset by opening and closing the cover.

The transfer switching equipment cannot be switched manually.

  • Check that the transfer switching equipment is in manual mode, that is, that the cover of the transfer switching equipment is open.

  • Use the handle extension to ensure that the appropriate torque is applied.

  • Check the direction of movement of the handle:

    • Rotate from position I to II in the counter-clockwise direction.

    • Rotate from position II to I in the clockwise direction.

  • Check whether the product is not padlocked.

  • Check the bolt length when using a single auxiliary switch. The bolts must not be longer than 20 mm.

The transfer switching equipment cannot be locked.

  • Check that the cover of the transfer switching equipment is open.

  • Check the switch position of the transfer switching equipment:

    • Locking is only possible in position 0 if the default locking setting of the transfer switching equipment has been left as found.

      Locking in all three positions I, 0 and II is only possible if the default setting on the rear of the transfer switching equipment was changed prior to installation.