Description
2.5 Standards and guidelines
3VA molded case circuit breakers with IEC certificate
Manual, 03/2019, A5E03603177010-03
65
It must be ensured that the cable or busbar connector does not reduce the air insulation
clearance.
Accessory components can increase the width or height of the molded case circuit breaker.
In this case the minimum clearances apply from the corresponding sides of the overall
molded case circuit breaker/accessory combination.
Damage to the molded case circuit breaker and the system
Depending on the application, larger minimum clearances may be necessary.
Please observe the specifications regarding air and creepage distances in the applicable
overriding guidelines (e.g. IEC 61439).
Safety clearances between molded case circuit breakers
No minimum clearance needs to be observed between the molded case circuit breakers on
the longitudinal sides (see table above).
The following safety clearances apply to molded case circuit breakers installed directly on
top of each other (for operation in the same network or at the same operational voltage):
See tables below for minimum clearance
Insulation of cable
Insulation of busbar
Insulation between the molded case circuit breakers
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