Siemens UL 1066 - Circuit Breaker Maintenance Procedures; Maintenance Preparation and Breaker Removal; Contact Erosion Check and Replacement

5 – 7
Recommendation for supporting the main conductors
X
The connecting bars of all poles should be braced together, line and load side separately.
Frame size
Rated breaking current
(kA)
Dimension x
(mm) (inch)
II
50 / 65 250 10
85 200 8
100 200 8
II fused 200 200 8
III
85 /100 200 8
130 / 150 100 4
III fused 200 200 8
These distances are recommendations and are not construction specifications. All designs should be type tested according to 
ANSI C37.20.1 and ANSI C37.51 for design validation.