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Front busbar and cable lug connections

The diagram below illustrates all the components available for implementing a busbar or cable lug connection on the front panel of the 3VA molded case circuit breaker.

Lug terminal

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With a lug terminal connection, it is possible to connect busbars and cable lugs directly to the jumper lug of the 3VA molded case circuit breaker.
A special terminal can be installed to provide an auxiliary conductor connection. For further information, please refer to chapter Auxiliary conductor terminal.

The table below provides an overview of the minimum and maximum sizes of cables and busbars which can be connected by a lug terminal.

Lug terminals can be ordered

  • as a pack of 3

  • as a pack of 4

Front connection bars extended

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Front connection bars extended can be installed to connect larger busbars and cable lugs outside the termination area of a 3VA molded case circuit breaker. The front connection bars therefore extend the jumper lug of the breaker.

All front connection bars extended are supplied as standard with phase barriers to provide insulation between individual phases (see chapter Insulating equipment).

A special terminal can be installed to provide an auxiliary conductor connection. For further information, please refer to chapter Auxiliary conductor terminal.

The table below provides an overview of the minimum and maximum sizes of cables and busbars which can be connected by front connection bars extended.

Front connection bars extended can be ordered

  • as a pack of 3

  • as a pack of 4

Front connection bars broadened

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Front connection bars broadened can be installed to connect very large busbars and cable lugs outside the termination area of a 3VA molded case circuit breaker. Front connection bars broadened increase the distance between pole centers of the jumper lugs of the molded case circuit breaker.

All front connection bars broadened are supplied as standard with phase barriers to provide insulation between individual phases (see chapter Insulating equipment).

A special terminal can be installed to provide an auxiliary conductor connection. For further information, please refer to chapter Auxiliary conductor terminal).

The table below provides an overview of the minimum and maximum sizes of cables and busbars which can be connected by front connection bars broadened.

Front connection bars broadened can be ordered

  • as a pack of 3

  • as a pack of 4

Front connection bars edgewise

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Front connection bars edgewise can be installed to connect large busbars and cable lugs outside the termination area of a 3VA molded case circuit breaker. The jumper lug of the breaker is turned by 90° when front connection bars edgewise are fitted.

All front connection bars edgewise are supplied as standard with phase barriers to provide insulation between individual phases (see chapter Insulating equipment).

A special terminal can be installed to provide an auxiliary conductor connection. For further information, please refer to chapter Auxiliary conductor terminal).

The table below provides an overview of the minimum and maximum sizes of cables and busbars which can be connected by front connection bars edgewise.

Front connection bars edgewise can be ordered

  • as a pack of 3

  • as a pack of 4

Connection technology

Cables and busbars

Front connection bars edgewise

Busbars

Front connection bars broadened

Flexible busbars

Front connection bars extended

Cable lugs

Lug terminal

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