Siemens SENTRON 3WA1 - Integration in Power Distribution Equipment; Compact Design

3WA1 air circuit breaker
Equipment Manual, 02/2023, 92310000002-06
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Integration in power distribution equipment
7
7.1 Compact design
The 3WA air circuit breaker makes it possible to build compact power distribution
equipment thanks to its compact design. For example, size 1 devices - up to 2500 A - fit
into a 400 mm wide control panel. In addition to the three compact 3WA circuit breaker
sizes, the 3WL10 circuit breaker is also available for rated currents up to 1250 A.
The 3-pole version of the size 3 3WA circuit breaker is the smallest device of its kind
(information correct in 2020). With its mounting width of 704 mm, it fits into an 800 mm
wide control panel.
The compact design and consequently optimized, reduced panel widths result in cost
savings with respect to:
• Copper bars (shorter main busbars)
• Control panel profiles
• Paneling and internal separation
• Installation in the control cabinet (lower space requirement)
Control panel widths when using 3WA circuit breakers
Size 1
630 … 2500 A
Size 2
2000 … 4000 A
Size 3
4000 … 6300 A
3-pole: 400 … 600 mm
3-pole: 600 … 800 mm
3-pole: 800 … 1000 mm
4-pole: 600 … 800 mm
4-pole: 800 … 1000 mm
4-pole: 1000 … 1200 mm