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Rear busbar and cable lug connections

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

Lug terminal, right-angled

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The right-angled lug terminal can be installed to connect busbars and cable lugs outside the termination area on the rear panel of a 3VA molded case circuit breaker. The jumper lug of the breaker is turned by 90° at right angles, allowing the busbar or cable lug to be connected at the rear.

NOTE

Right-angled lug terminals may only be connected to phases 1, 3 and 5 (top terminals) owing to the gases expelled by 3VA molded case circuit breakers.

In addition, a box terminal can also be attached to the right-angled lug terminal allowing direct connection of a cable.

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All right-angled lug terminals 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 means of the right-angled lug terminal.

Right-angled lug terminals can be ordered

  • as a pack of 3

  • as a pack of 4

Rear connecting studs

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The rear connecting studs can be installed to connect busbars and cable lugs to the rear panel of a 3VA molded case circuit breaker.

The dimensions of rear connecting studs are given in the table below:

Rear connecting studs can be ordered

  • as a pack of 3 (2 short studs and 1 long stud)

  • as a pack of 4 (2 short studs and 2 long studs)

  • as a pack of 1 (1 short stud)

  • as a pack of 1 (1 long stud)

NOTE

In order to achieve degree of protection IP40, terminal covers (flat version) must also be attached when a rear connecting stud is installed.

Rear terminal flat

The rear terminal flat can be installed to connect busbars and cable lugs to the rear panel of a 3VA molded case circuit breaker.

The rear terminal flat can be rotated in steps of 45°, i.e. it can be installed an an angle of 0°, 45° or 90°:

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The dimensions of rear terminals flat are given in the table below:

Rear terminals flat can be ordered

  • as a pack of 3 (2 short terminals flat and 1 long terminal flat)

  • as a pack of 4 (2 short terminals flat and 2 long terminals flat)

  • as a pack of 1 (1 short terminal flat)

  • as a pack of 1 (1 long terminal flat)

NOTE

In order to achieve degree of protection IP40, terminal covers (flat version) must also be attached when a rear terminal flat is installed.

Connection technology

Cables and busbars

Lug terminal, right-angled

Busbars

Rear connecting stud

Flexible busbars

Rear terminal flat

Cable lugs

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