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1SDA073773R1 ABB RTC 250VAC E2.2…E6.2 Ready-to-Close Contact
ABB 1SDA073773R1 RTC is a 250 V AC ready-to-close signalling contact for compatible SACE Emax 2 E2.2, E4.2 and E6.2 air circuit breakers.
£230.24
Why Choose the ABB RTC 250VAC E2.2...E6.2 Ready-to-Close Contact?
The ABB RTC 250VAC E2.2...E6.2, order code 1SDA073773R1, is a ready-to-close (RTC) signalling contact designed for compatible ABB SACE Emax 2 air circuit breakers. Intended for E2.2, E4.2 and E6.2 frame sizes, it provides an electrical indication that the circuit breaker is in the correct condition to accept a closing command.
Ready-to-close signalling is valuable in remotely operated and automated switchgear because it allows an external control system to verify breaker readiness before initiating a closing sequence. The RTC contact therefore supports dependable coordination between the circuit breaker and PLCs, control panels, supervisory equipment and power management systems.
This version is specified for signalling circuits up to 250 V AC. As a purpose-designed ABB Emax 2 accessory, the 1SDA073773R1 provides reliable status feedback for applications requiring controlled, supervised or automated circuit-breaker operation.
Key Advantages
- Genuine ABB ready-to-close signalling accessory.
- Provides electrical confirmation that the circuit breaker is ready for closing.
- 250 V AC version for compatible signalling and control circuits.
- Designed for Emax 2 E2.2, E4.2 and E6.2 circuit breakers.
- Supports remote and automated breaker-closing sequences.
- Useful for PLC, supervisory and switchgear control systems.
- Purpose-designed for integration with ABB SACE Emax 2 air circuit breakers.
Key Features
- RTC ready-to-close contact.
- 250 V AC signalling version.
- Provides circuit-breaker closing-readiness indication.
- Compatible with E2.2, E4.2 and E6.2 Emax 2 frames.
- Supports electrical and remote circuit-breaker control schemes.
- Suitable for automation and supervisory status circuits.
- Provides a dedicated signal for closing permissive logic.
- Part of the ABB SACE Emax 2 accessory platform.
Ready-to-Close Signalling for Controlled Switching
A ready-to-close contact provides an electrical indication that the relevant mechanical and operating conditions are satisfied for a circuit-breaker closing operation. This signal can be incorporated into closing permissive logic so that remote control systems can verify breaker readiness before issuing a closing command.
The ABB 1SDA073773R1 provides this functionality for compatible Emax 2 E2.2, E4.2 and E6.2 air circuit breakers. Its 250 V AC signalling version makes it suitable for a broad range of industrial and infrastructure switchgear control schemes where reliable breaker-status information is required.
Typical Applications
- ABB SACE Emax 2 E2.2, E4.2 and E6.2 air circuit breakers.
- Ready-to-close status indication.
- Remote-operated low-voltage switchboards.
- PLC and industrial automation systems.
- Automatic switching and power management systems.
- Supervisory control and breaker interlocking schemes.
Technical Specifications
| Series | SACE Emax 2 Accessories |
|---|---|
| ABB order code | 1SDA073773R1 |
| Product type | Ready-to-close signalling contact |
| Accessory designation | RTC |
| Signalling function | Circuit breaker ready to close |
| Voltage version | 250 V AC |
| Compatible frame sizes | E2.2, E4.2, E6.2 |
| Product family | SACE Emax 2 |
| Primary application | Circuit-breaker status and closing-readiness signalling |
Frequently Asked Questions
What is the ABB 1SDA073773R1?
It is an RTC ready-to-close signalling contact for compatible ABB SACE Emax 2 air circuit breakers.
What does RTC mean on the ABB 1SDA073773R1?
RTC means ready to close. The accessory provides an electrical indication that the circuit breaker is in the required condition for a closing operation.
What voltage version is the ABB 1SDA073773R1?
The 1SDA073773R1 is the 250 V AC version of the RTC signalling accessory.
Which Emax 2 circuit breakers are compatible with the ABB 1SDA073773R1?
The RTC accessory is intended for compatible ABB SACE Emax 2 E2.2, E4.2 and E6.2 circuit breakers.
Why is a ready-to-close contact useful in automated switchgear?
It allows the control system to confirm breaker closing readiness before issuing a closing command, supporting controlled and remotely supervised switching sequences.
Trusted Circuit Breaker Accessories from ABB
ABB SACE Emax 2 signalling accessories provide dependable circuit-breaker status information for remote control, automation and supervisory systems in industrial, commercial and infrastructure power distribution installations.
