Siemens SENTRON 3WA1 - Article Number

Inspection and maintenance
5.7 Maintaining the main contacts
3WA1 air circuit breaker
414 Equipment Manual, 02/2023, 92310000002-06
8. Reassemble the circuit breaker in the reverse sequence to removal.
Tighten the screws with a tightening torque of 10 Nm and 8 Nm for the arc chutes.
9. If you have removed an undervoltage release, reinstall it now.
10. After replacing the contact system, reset the maintenance alarm with the help of the
SENTRON powerconfig configuration software.
5.7.3 Article number
Note
Replacement only to be performed by the manufacturer
In the case of the following circuit breakers, only Siemens may replace the main
contacts, as a special calibration procedure is required:
•
Size 1:
– 3WA11..-4…, devices with breaking capacity M
– 3WA11..-8…, devices with breaking capacity E
– 3WA112.-…, devices with rated current of 2000 A or 2500 A
•
Size 2:
– 3WA12..-4..1…, 3WA12..-4..4…, devices with breaking capacity M in 4-pole version
– 3WA12..-5..1…, 3WA12..-5..4…, devices with breaking capacity H in 4-pole version
– 3WA12..-6…, devices with breaking capacity C
– 3WA12..-8..1…, 3WA12..-8..4…, devices with breaking capacity E in 4-pole version
•
Size 3:
– 3WA13..-6…, devices with breaking capacity C
– 3WA13..-8…, devices with breaking capacity E