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Vertical connection 4000 A version
Safety distances
No additional safety distance from adjacent, grounded components is required above the
Circuit Breaker (on fixed-mounted Circuit Breakers marked with "⑥").
The distance between the connection point and bar support must not exceed 250 mm
Up to a rated operating voltage of 440 V AC, the vertical bars (e.g. with front connection)
must not be shielded if the busbar system is not located above the Circuit Breaker.
On the other hand, live, bare conductors and bars with voltages in excess of 440 V AC (if they
are located above the Circuit Breaker and if the current is supplied from above) should be
protected against flashover by means of phase barriers, bar covers, or arc chute covers (only
use accessories for horizontal or vertical connections).
Optional electrical equipment directly above the Circuit Breaker (if arc chutes are not used) or
next to the Circuit Breaker should be protected with a cover. Once you have installed
additional phase barriers or covers, you must ensure that heat dissipation from the Circuit
Breaker is not impeded.
3WJ Air Circuit breakers
Operating Instructions, 12/2022, L1V30828903001-01
Technical specifications
5.2 Dimension drawings
201
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