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1SDA073774R1 ABB RTC 24VDC E2.2…E6.2 Ready-to-Close Contact
ABB 1SDA073774R1 RTC is a 24 V DC ready-to-close signalling accessory with one changeover contact for compatible SACE Emax 2 E2.2, E4.2 and E6.2 air circuit breakers.
£230.24
Why Choose the ABB RTC 24VDC E2.2...E6.2 Ready-to-Close Contact?
The ABB RTC 24VDC E2.2...E6.2, order code 1SDA073774R1, is a 24 V DC ready-to-close signalling contact designed for ABB SACE Emax 2 air circuit breakers. Compatible with E2.2, E4.2 and E6.2 frame sizes, it provides an electrical indication when the conditions necessary for closing the circuit breaker are satisfied.
The RTC accessory uses one changeover contact to provide closing-consent signalling. The contact changes state when the breaker is ready to close, allowing the signal to be incorporated into control panels, PLC systems, remote supervision equipment and automated switching sequences.
Designed specifically for 24 V DC signalling circuits, the 1SDA073774R1 is well suited to modern industrial automation and low-voltage control architectures. Its dedicated ready-to-close function provides dependable status feedback for remotely controlled and automated Emax 2 installations.
Key Advantages
- Genuine ABB RTC ready-to-close signalling contact.
- 24 V DC version for low-voltage control and automation systems.
- Provides positive indication when the circuit breaker is ready for closing.
- Uses one changeover contact for closing-consent signalling.
- Compatible with Emax 2 E2.2, E4.2 and E6.2 circuit breakers.
- Supports PLC, remote control and automated switching systems.
- Purpose-designed for integration with ABB SACE Emax 2 air circuit breakers.
Key Features
- RTC ready-to-close signalling contact.
- 24 V DC signalling version.
- 1 changeover contact.
- Open/closed changeover contact for closing consent.
- No dedicated normally open contacts.
- No dedicated normally closed contacts.
- Compatible with E2.2 through E6.2 Emax 2 frame sizes.
- Suitable for remote supervision and automated breaker control.
Reliable 24 V DC Ready-to-Close Signalling
The RTC contact provides a potential-free status signal when the conditions required for circuit-breaker closing are fulfilled. These conditions include the appropriate breaker and operating-mechanism state, allowing an external control system to determine whether a closing command can be issued.
With its single changeover contact and 24 V DC signalling configuration, the ABB 1SDA073774R1 is particularly suitable for PLC-based switchgear and automation systems. It provides a straightforward way to incorporate Emax 2 closing readiness into interlocking, supervision and automated operating logic.
Typical Applications
- ABB SACE Emax 2 E2.2, E4.2 and E6.2 air circuit breakers.
- Ready-to-close status indication.
- 24 V DC PLC and automation circuits.
- Remote-operated low-voltage switchboards.
- Automatic switching and power management systems.
- Supervisory control and circuit-breaker interlocking schemes.
Technical Specifications
| Series | SACE Emax 2 Accessories |
|---|---|
| ABB order code | 1SDA073774R1 |
| US / Canada order code | ZEBRTCD |
| Product type | Ready-to-close auxiliary signalling contact |
| Accessory designation | RTC |
| Signalling function | Ready-to-close / closing consent |
| Rated signalling voltage | 24 V DC |
| Number of changeover contacts | 1 |
| Compatible frame sizes | E2.2, E4.2, E6.2 |
| Product family | SACE Emax 2 |
| ETIM classification | EC000041 – Auxiliary contact block |
| Standard | IEC |
| EAN | 8015644777074 |
Frequently Asked Questions
What is the ABB 1SDA073774R1?
It is a 24 V DC RTC ready-to-close signalling contact for compatible ABB SACE Emax 2 E2.2, E4.2 and E6.2 air circuit breakers.
What does RTC mean on the ABB 1SDA073774R1?
RTC means ready to close. The contact provides an electrical closing-consent signal when the circuit breaker satisfies the conditions required for closing.
How many contacts does the ABB 1SDA073774R1 provide?
The accessory provides one changeover contact for ready-to-close signalling.
Which Emax 2 circuit breakers are compatible with the ABB 1SDA073774R1?
The RTC contact is designed for ABB SACE Emax 2 E2.2, E4.2 and E6.2 circuit breakers.
What is the voltage rating of the ABB 1SDA073774R1?
This RTC version is designed for 24 V DC signalling and control applications.
Trusted Circuit Breaker Accessories from ABB
ABB SACE Emax 2 signalling accessories provide dependable circuit-breaker status feedback for remote control, automation and supervisory systems in industrial, commercial and infrastructure power distribution installations.
