Isolating Distances And Insulating Equipment - Siemens SENTRON 3WL10 Series Manual

4.2.1

Isolating distances and insulating equipment

When live parts are installed, the following rules must be followed:
● Minimum isolating distance between the phases:
● Isolating distances within the switchboard panel
To observe the isolating distances inside the panel, the following minimum dimensions for
the interior of the panel must be observed:
Air circuit breaker 3WL10
Manual, 11/2017, L1V30499596002-01
Rated insulation voltage U
1000 V
4.2 Power supply, grounding, and connection
Smallest distance
i
acc. to IEC 61439: 14 mm
Siemens recommendation: 25 mm
A
3-pole
Fixed break- 250 mm
er
Withdrawable 280 mm
breaker
Application planning
W C
4-pole
322 mm ≤ 440 V: 332.5 mm
> 440 V: 382.5 mm
350 mm ≤ 440 V: 390 mm
> 440 V: 440 mm
D
130 mm
252 mm
119