Accessories
4.5 Accessories for main connections
3WA1 air circuit breaker
Equipment Manual, 02/2023, 92310000002-06
281
Vertical on top,
horizontal at the bottom
Horizontal on top,
vertical at the bottom
Main connections installed at the factory are available in the following versions:
• Rear horizontal main connection (top/bottom)
• Rear vertical main connection (top/bottom)
• Front-accessible main connections according to DIN 43673 with double hole
(top/bottom)
Combinations of different connection types on the same circuit breaker are possible. The
following factory-installed combinations are available:
• Rear vertical main connections on top/rear horizontal main connections at the bottom
• Rear horizontal main connections on top/rear vertical main connections at the bottom
Furthermore, main connection components supplied as accessories make it possible for
the customer to combine rear vertical and front-accessible main connections.
Note
In the case of combinat
ions of horizontal and vertical connections, the derating of the
rear horizontal main circuit connection always applies. This has an inferior derating value
due to the higher eddy current losses (see Chapter Derating in the power distribution
equipment (Pa
ge 517)).
Rear horizontal main connection
The rear horizontal main connection is available on the circuit breakers as standard. It
can be used both for the direct connection of busbars and as a basis for mounting
different connection methods (e.g. vertical connections).
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