Siemens 3WL9111 Circuit Breaker Accessory

Feature & Principle

3WL9111 is the accessory series code for Siemens SENTRON 3WL air circuit breaker, covering multiple functional attachments. It supports communication expansion, position feedback, trip test, mechanical interlock, opening/closing drive and current sensing. These modular accessories are mounted on breaker body or draw-out cradle to extend protection, signal transmission and interlock functions for low voltage distribution monitoring. Most items of this series are obsolete, used as replacement spares for switchgear maintenance.

Specifications

Model: 3WL9111 series Brand: Siemens Applicable breaker: SENTRON 3WL air circuit breaker Category: COM communication module, position signal switch, shunt release, ETU test unit, mechanical interlock, N-phase CT, auxiliary contact Installation: Built-in / drawer frame mount Application: Industrial low voltage distribution cabinet, power station, data center power distribution Certification: CE, IEC60947-2

Components & Diagnostics

Communication PCB, micro switch assembly, electromagnetic coil, current transformer, mechanical lock assembly, indicator LED, terminal block. Common faults: communication failure, position signal loss, coil burnout, mechanical jamming.

Product Brief

3WL9111 circuit breaker accessory, Siemens SENTRON 3WL ACB supporting spare widely used for low voltage distribution cabinet overhaul and replacement.