Siemens SINOVA - Technical Specifications; Circuit Diagrams and Terminal Connections

Inspection & Maintenance
4.7 Maintaining the main contact system
3WJ Air Circuit breakers
Operating Instructions, 12/2022, L1V30828903001-01
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• Check the indicator for wear on the contacts.
• Open the Circuit breaker.
Attaching the arc chutes
• Insert the arc chutes.
• Tighten the fixing screws to secure the arc chutes.