Installing/mounting
7.2 Mounting and safety clearances
3VL molded-case circuit breakers
90 System Manual, 03/2009, 110 0110 - 02 DS 01
Safety clearances between circuit breakers
Minimum clearance between two circuit breakers installed above one another with different
kinds of connections.
$
$ %
&
'
$
$
$
A Connection on the front with cable, direct
B Connection on the front with cable lug
C Connection on the front with flat connecting bar
D Connection on the back with plug-in socket or busbar terminals
① Insulation
② Insulation busbar
Figure 7-5 Table of different connection types
Table 7- 3 Safety clearances between circuit breakers
Circuit breaker type VL160X VL160 VL250 VL400 VL630 VL800 VL1250 VL1600
Switching capacity LV HRC NHL NHL
A ≤ 690 V 160 mm 200 mm
The clearances given in the table are necessary to enable any ionized gases arising during a
short-circuit to disperse
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