ABB AUX-C 1Q+1SY 24VDC Auxiliary Contacts for Tmax XT1-XT4 Circuit Breakers

The ABB AUX-C 1Q+1SY 24VDC auxiliary contact block is a precision-engineered accessory designed specifically for integration with ABB Tmax XT1, XT2, XT3, and XT4 molded case circuit breakers. This component serves as a critical interface for monitoring the operational state of the circuit breaker, providing reliable electrical feedback to control systems. By utilizing a 24V DC signal, it ensures seamless communication within industrial electrical panels and automation setups.

Advantages

This auxiliary contact block offers high reliability and durability, consistent with the standards expected from ABB electrical components. The inclusion of both a position contact and a trip indication contact allows for comprehensive monitoring of the breaker status, which is vital for maintaining safety and operational efficiency in complex electrical systems. Its compact design ensures that it integrates smoothly into the existing breaker housing without requiring significant additional space, facilitating easier installation and maintenance processes.

Suitable for

• Industrial automation and control systems
• Remote monitoring of circuit breaker status
• Electrical distribution panels requiring trip signaling
• Safety-critical power management applications

When it may not be suitable

This auxiliary contact is specifically calibrated for 24V DC systems and should not be used in circuits with different voltage requirements or AC applications unless explicitly specified by the manufacturer. It is also incompatible with circuit breaker series outside of the Tmax XT1-XT4 range.

Key specifications

• Voltage rating: 24V DC
• Contact configuration: 1Q (position) + 1SY (trip indication)
• Compatibility: ABB Tmax XT1, XT2, XT3, and XT4 molded case circuit breakers
• Function: Status and trip signaling

How to use

Installation should be performed by a qualified electrician in accordance with the circuit breaker manual. The contact block is inserted into the designated accessory slot on the Tmax XT breaker. Ensure the power is disconnected before attempting installation. Once seated, the electrical connections for the 24V DC signal should be wired to the corresponding terminals to enable the monitoring functionality.

What to consider before purchase

• Verify the specific model of your Tmax XT circuit breaker
• Ensure your control system operates on a 24V DC supply
• Confirm that the required signaling logic matches the 1Q+1SY configuration

Usage recommendations

Always verify the wiring diagram provided with your specific circuit breaker model to ensure correct terminal assignment and prevent damage to the auxiliary contacts or the control system.