Connecting the bridging bar on the load side

WARNING

Hazardous voltage!

Ensure there is no live voltage before beginning to mount the bridging bars.

If the transfer switching equipment is used for switching between two networks (in accordance with IEC 60947‑6‑1), a bridging bar must be used on the load side.

NOTE

However, if the 3KC3 transfer switching equipment is used as a load transfer switch for switching between 2 loads (in accordance with IEC 60947‑3), a bridging bar must be mounted on the input side.

The bridging bar is not included in the scope of supply and must be ordered as an accessory. You can find more detailed information on the bridging bar in the section titled Bridging bar.

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Bridging bar

Procedure

  1. Insert the bridging bar (3KC9618-2: 40 A to 125 A or 3KC9618-3: 160 A) into the lower openings of the box terminals.

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    Insert the bridging bar
  2. Connect the cables of the main circuit with phase equality in the upper openings of the box terminals.
    If an auxiliary conductor terminal is used, insert this here. For more information, see the section titled Connecting the auxiliary conductor terminal.

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    Connect the main circuit cables
  3. Tighten all the screws of the box terminals. The screws of the unassigned box terminals must also be tightened.

    NOTICE

    System damage possible if screws of box terminals are loose

    Tighten the screws of all 8 box terminals.