Siemens 3WL1225-2CB31-1AA4-Z Air Circuit Breaker

Feature & Principle

It is a fixed type intelligent air circuit breaker of Siemens SENTRON 3WL series. Equipped with ETU electronic trip unit, it supports LSI multi-stage protection, power measurement and fault recording. It can be expanded with communication modules for CubicleBUS or Profibus communication. It adopts vertical rear wiring structure, with reliable mechanical interlock, suitable for fixed installation in low voltage switchgear for incoming and heavy feeder protection.

Specifications

Model: 3WL1225-2CB31-1AA4-Z Brand: Siemens Series: SENTRON 3WL Frame size: Size II Pole: 3P Rated current In: 2500 A Rated operational voltage: 690 V AC Trip unit: ETU electronic trip unit Protection: LSI Structure: Fixed mounting Connection: Rear vertical connection Standard: IEC 60947-2 Application: Industrial main switchboard, data center, power plant Certification: CE

Components & Diagnostics

Main contact assembly, arc extinguishing chamber, ETU trip unit, spring charging mechanism, operating motor, auxiliary switch, communication expansion interface. Common faults: spring charging failure, contact overheating, false tripping, communication offline, trip unit alarm.

Product Brief

3WL1225-2CB31-1AA4-Z air circuit breaker, Siemens low voltage power distribution spare widely used for factory fixed incoming cabinet and power distribution system overhaul and replacement.