ACB: 3WJ Accessories for electronic trip unit – 3WJ9111-0AH01

Product Description

Siemens 3WJ ACB Accessories – Electronic Trip Unit Cover – 3WJ9111-0AH01

The Siemens 3WJ9111-0AH01 is an auxiliary signaling switch accessory designed for SENTRON 3WJ Air Circuit Breakers (ACB). It is used to provide a “Ready-to-Close” status indication signal, ensuring safe and reliable operation of the breaker within low-voltage switchgear systems.

This accessory plays an important role in monitoring breaker readiness conditions, helping operators and control systems verify that the ACB is in a safe condition before closing. It is widely used in industrial power distribution panels, LT switchboards, and critical infrastructure applications where operational safety and system reliability are essential.

Built with Siemens high-quality engineering standards, it ensures accurate signaling, long mechanical life, and dependable performance in demanding electrical environments.

Key Features

• Siemens SENTRON 3WJ series ACB accessory
• Part Number: 3WJ9111-0AH01
• Ready-to-Close signaling switch function
• Provides reliable breaker status indication
• Enhances safety before closing operation
• 1 NO contact output (signal switching)
• Modular plug-in design for easy installation
• Suitable for industrial LV switchgear systems
• High mechanical and electrical endurance
• Complies with IEC 60947 standards