Installing/mounting
6.2 Mounting and safety clearances
3VL IEC molded case circuit breakers
82 System Manual, 11/2013, 110 0110 - 02 DS 03
If uninsulated conductors are connected to terminals 1, 3, 5, they must be insulated from
each other independently of the direction of the mains supply. This can be achieved using
phase barriers or terminal covers.
Terminal covers must be used for the main terminals at voltages of > 600 V AC
or > 500 V DC.
Note
We recommend you also insulate connections 2, 4 and 6 from
each other for additional
Minimum clearance between two horizontally or vertically installed molded case circuit breakers
Ensure the busbar or cable connection does not reduce the air insulation clearance. The
permissible clearance between two molded case circuit breakers applies for both fixed-
mounted and plug-in versions. Some accessories may increase the width of the circuit
breaker.
F
No minimum clearance is required between the molded case circuit breaker and the control
Figure 6-3 Minimum clearance between the molded case circuit breaker and metal
The clearance between the terminal and the grounded metal must be G ≥ 12 mm.
If the clearance to ground G is < 12 mm, live parts must be insulated or a suitable barrier
must be installed.
Depending on the application, appropriate air and creepage distances must be observed
that are described in standards IEC 61439-1 and 61439-2.
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