ABB 1SDA073770R1 RTC 250VAC E1.2-XT7M Changeover Contact Accessory for SACE Emax 2 Circuit Breaker

The ABB 1SDA073770R1 RTC 250VAC E1.2-XT7M is a factory-verified changeover contact accessory designed for use with ABB SACE Emax 2 series air circuit breakers. Rated at 250V AC, the RTC 250VAC E1.2-XT7M delivers reliable switching signal output for position indication and remote signalling in demanding industrial control panel applications. Compact and lightweight at just 0.2 kg, it integrates seamlessly into Emax 2 and XT7M frame installations.

Technical Specifications

Certifications & Standards

• CE: Conforms to applicable European Union directives for electrical equipment safety and electromagnetic compatibility.
• RoHS: Compliant with the Restriction of Hazardous Substances Directive — free from restricted substances including lead, mercury, and cadmium.
• REACH: Compliant with EU REACH regulation on chemical safety (Registration, Evaluation, Authorisation and Restriction of Chemicals).
• ATEX: Certified for use in potentially explosive atmospheres in accordance with ATEX Directive 2014/34/EU.
• VDE: Tested and certified by VDE (Verband der Elektrotechnik), Germany's leading electrical engineering standards body.
• WEEE: Registered under the Waste Electrical and Electronic Equipment Directive for responsible end-of-life recycling.

Applications & Use Cases

• Position indication and status signalling for ABB Emax 2 air circuit breakers in low-voltage switchgear panels
• Remote monitoring of breaker open/closed state in industrial power distribution systems
• Integration into SCADA, PLC, and building management systems requiring a changeover (Form C) contact output
• Control panel installations requiring ATEX-rated accessories for hazardous area environments
• Motor control centres and main distribution boards where reliable auxiliary signalling is critical

Frequently Asked Questions

Q: What circuit breaker frames is the RTC 250VAC E1.2-XT7M compatible with?
A: The RTC 250VAC E1.2-XT7M is designed for the ABB SACE Emax 2 (E1.2) and XT7M frame circuit breakers as indicated in the catalog number designation.

Q: What does the RTC accessory do?
A: The RTC (Rotary changeover contact) provides a changeover contact signal that indicates the open or closed position of the circuit breaker, enabling remote status monitoring and control interlocking.

Q: Is the 1SDA073770R1 suitable for hazardous area installations?
A: Yes. The RTC 250VAC E1.2-XT7M carries ATEX certification, making it suitable for use in potentially explosive atmospheres subject to the applicable installation requirements.