ACB: 3WJ Accessories & Spares Undervoltage release (UVR)- 3WJ9111-0AE01

Product Description

Siemens 3WJ Air Circuit Breaker (ACB) – Undervoltage Release (UVR) – 3WJ9111-0AE01

The Siemens 3WJ9111-0AE01 is an undervoltage release (UVR) accessory designed for the SENTRON / SINOVA 3WJ series Air Circuit Breakers (ACB). It is used in industrial and commercial LT power distribution systems to ensure automatic tripping of the ACB when the supply voltage drops below a safe level or is completely lost.

This safety device is widely used in PCC panels, main LT switchboards, generator systems, and critical power installations where uncontrolled restart or undervoltage operation must be prevented.

It is typically applied in systems requiring fail-safe disconnection, ensuring that the breaker can only be closed when a healthy control voltage is present.

Key Features

• Siemens 3WJ series ACB accessory
• Undervoltage Release (UVR) function
• Automatically trips ACB during voltage drop or power failure
• Ensures fail-safe system operation
• Designed for 3WJ Air Circuit Breakers
• Available for different control voltages (variant dependent)
• High reliability for critical protection circuits
• IEC-compliant switchgear accessory