Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
1SDA073770R1 ABB RTC 250VAC E1.2 Ready-to-Close Contact
ABB 1SDA073770R1 is a 250 V AC RTC ready-to-close auxiliary contact providing one changeover contact for readiness signalling on compatible ABB Emax 2 E1.2 air circuit breakers.
£230.24
Why Choose the ABB 1SDA073770R1 RTC 250VAC Ready-to-Close Contact?
The ABB 1SDA073770R1 is an RTC ready-to-close auxiliary contact designed for the ABB Emax 2 E1.2 air circuit breaker. The accessory provides an electrical signal indicating when the circuit breaker is in a condition that permits a closing operation, allowing this readiness information to be used by external control, indication and automation systems.
Unlike a conventional open/closed auxiliary contact, the RTC contact is specifically associated with the breaker's ready-to-close condition. This makes it useful in remotely controlled switchgear where a control system needs confirmation that the required breaker conditions are satisfied before issuing or enabling a closing command.
The 1SDA073770R1 is specified as RTC 250VAC E1.2 and provides one changeover contact for ready-to-close signalling. Its 250 V AC configuration and dedicated Emax 2 E1.2 compatibility make it a practical accessory for breaker monitoring, electrical interlocking and automated power distribution applications.
Key Advantages
- Dedicated ready-to-close (RTC) signalling contact for ABB Emax 2.
- Designed specifically for the Emax 2 E1.2 circuit breaker frame.
- Provides electrical indication of the breaker's readiness for a closing operation.
- 250 V AC version for compatible control and signalling circuits.
- Provides one changeover contact for flexible status signalling.
- Supports remote control, automation, monitoring and electrical interlocking schemes.
Key Features
- ABB Emax 2 RTC accessory.
- RTC: Ready-to-close contact.
- 250 V AC version.
- One changeover contact.
- Designed for ABB Emax 2 E1.2 air circuit breakers.
- Provides breaker readiness information to external control systems.
- Suitable for indication, interlocking and automated breaker-control applications.
- ABB order code 1SDA073770R1.
Ready-to-Close Feedback for Automated Circuit Breaker Control
Remote circuit breaker closing systems benefit from knowing whether the breaker is actually in a condition that permits a closing operation. The RTC accessory provides this dedicated readiness signal, allowing external equipment to monitor the breaker's ready-to-close state rather than relying only on its current open or closed position.
The ABB 1SDA073770R1 provides this function for the Emax 2 E1.2 platform through a 250 V AC ready-to-close changeover contact. The resulting signal can be incorporated into suitable control, interlocking and supervisory logic to improve coordination of remotely operated circuit breaker systems.
Typical Applications
- ABB Emax 2 E1.2 air circuit breaker installations.
- Ready-to-close status indication.
- Remote circuit breaker control systems.
- Industrial low-voltage switchboards.
- Electrical interlocking and sequencing circuits.
- Automated power distribution and supervisory control systems.
Technical Specifications
| Series | Emax 2 |
|---|---|
| Order code | 1SDA073770R1 |
| Product type | Ready-to-close auxiliary contact |
| Accessory designation | RTC |
| Rated voltage | 250 V AC |
| Number of changeover contacts | 1 |
| Contact function | Ready-to-close status signalling |
| Compatible breaker frame | E1.2 |
| Compatible series | ABB Emax 2 Air Circuit Breakers |
| Function | Electrical indication that the circuit breaker is ready for a closing operation |
| ABB product group | Emax2 Air Circuit Breaker |
Frequently Asked Questions
What is the ABB 1SDA073770R1 used for?
The ABB 1SDA073770R1 is an RTC ready-to-close auxiliary contact used to provide an electrical indication that a compatible ABB Emax 2 E1.2 circuit breaker is in a condition that permits closing.
What does RTC mean on the ABB 1SDA073770R1?
RTC means ready to close. The contact provides a status signal associated with the circuit breaker's readiness to perform a closing operation.
What voltage is the ABB 1SDA073770R1 rated for?
The 1SDA073770R1 is the 250 V AC version of the RTC ready-to-close contact.
Which ABB circuit breaker is compatible with the 1SDA073770R1?
The accessory is specified for the ABB Emax 2 E1.2 air circuit breaker frame.
How many contacts does the ABB 1SDA073770R1 provide?
The RTC accessory provides one changeover contact for ready-to-close status signalling.
Can the ABB 1SDA073770R1 be used in automated switchgear?
Yes. Its ready-to-close feedback can be incorporated into compatible remote-control, interlocking and automation systems to confirm breaker readiness before a closing operation.
Trusted by Electrical and Switchgear Professionals Worldwide
ABB Emax 2 air circuit breakers and their dedicated signalling accessories provide an integrated platform for low-voltage power distribution, helping switchboard builders and electrical engineers implement dependable breaker monitoring, interlocking, remote control and automation.
