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1SDA073701R1 ABB YU E1.2..E6.2 240-250 VAC/DC Undervoltage Release
ABB 1SDA073701R1 YU 240–250 V AC/DC undervoltage release for voltage-dependent tripping of compatible SACE Emax 2 E1.2, E2.2, E4.2 and E6.2 circuit breakers.
£167.05
Why Choose the ABB YU E1.2..E6.2 240-250 VAC/DC Undervoltage Release?
The ABB YU E1.2..E6.2 240-250 VAC/DC, order code 1SDA073701R1, is an undervoltage release designed for compatible ABB SACE Emax 2 air circuit breakers. Operating from a 240–250 V AC/DC control supply, it monitors the control voltage and provides automatic circuit-breaker release when the voltage falls significantly below the required operating level.
As part of the ABB Emax 2 electrical accessory range, the YU undervoltage release is suitable for E1.2, E2.2, E4.2 and E6.2 frame sizes. ABB also specifies this accessory for compatible XT7 and XT7M circuit breakers, providing a versatile undervoltage protection solution across several low-voltage breaker platforms.
The 1SDA073701R1 supports both AC and DC control circuits within its specified voltage range. Its fail-safe operating principle makes it particularly useful in switchboards, industrial distribution systems and automated installations where the associated circuit breaker must respond predictably to a loss or significant reduction of control voltage.
Key Advantages
- Genuine ABB YU undervoltage release for low-voltage circuit breakers.
- 240–250 V AC/DC rated voltage for AC and DC control circuits.
- Compatible with SACE Emax 2 E1.2, E2.2, E4.2 and E6.2 frame sizes.
- Also suitable for compatible XT7 and XT7M circuit breakers.
- Monitors control voltage and releases the breaker following a significant undervoltage condition.
- Supports fail-safe control, electrical interlocking and automated power-distribution schemes.
Key Features
- ABB YU undervoltage release.
- 240–250 V AC/DC rated voltage.
- Designed for ABB SACE Emax 2 air circuit breakers.
- Compatible with E1.2 through E6.2 frame sizes.
- Additional compatibility with XT7 and XT7M circuit breakers.
- AC/DC operating voltage type.
- Suitable for IEC circuit-breaker applications.
- Compatible with the appropriate ABB UVD electronic time-delay device for delayed undervoltage operation.
- ABB order code 1SDA073701R1.
Reliable Undervoltage Protection for Circuit Breakers
An undervoltage release monitors the voltage applied to its control circuit and acts on the associated circuit-breaker mechanism when that voltage falls significantly. This enables the breaker to open during an undervoltage or loss-of-supply condition and helps prevent normal closing when sufficient voltage is not available to energise the release.
The ABB YU accessory integrates with the modular SACE Emax 2 platform and supports multiple breaker frame sizes. Where an installation requires undervoltage operation to be intentionally delayed, a compatible ABB UVD electronic time-delay device with the corresponding voltage rating can be used with the undervoltage release.
Typical Applications
- Industrial low-voltage power-distribution switchboards.
- Undervoltage protection of ABB SACE Emax 2 circuit breakers.
- Electrical interlocking and fail-safe control circuits.
- Generator and utility distribution panels.
- Automated switchgear and power-management systems.
- Commercial and infrastructure electrical distribution.
Technical Specifications
| Series | SACE Emax 2 |
|---|---|
| Order code | 1SDA073701R1 |
| Product type | Undervoltage release / undervoltage coil |
| Accessory designation | YU |
| Rated voltage | 240–250 V |
| Control voltage at 50 Hz AC | 240–250 V AC |
| Control voltage DC | 240–250 V DC |
| Current type | AC/DC |
| Compatible Emax 2 frame sizes | E1.2, E2.2, E4.2 and E6.2 |
| Additional compatibility | XT7 and XT7M |
| Function | Undervoltage monitoring and circuit-breaker release |
| Configuration type | Loose or configurable |
| Standard | IEC |
Frequently Asked Questions
What is the ABB 1SDA073701R1 used for?
The ABB 1SDA073701R1 is a YU undervoltage release used to monitor control voltage and release compatible circuit breakers when a significant undervoltage condition occurs.
What voltage is the ABB 1SDA073701R1 rated for?
The YU undervoltage release is rated for a 240–250 V AC/DC control supply.
Which Emax 2 circuit breakers are compatible with this YU release?
The accessory is suitable for ABB SACE Emax 2 E1.2, E2.2, E4.2 and E6.2 frame sizes.
What happens if the supply voltage to the YU release falls significantly?
The undervoltage release acts on the associated breaker mechanism so that the circuit breaker opens when the control voltage falls sufficiently, providing fail-safe response to an undervoltage condition.
Can the operation of the ABB YU undervoltage release be delayed?
Yes. ABB provides a compatible UVD electronic time-delay device for applications requiring delayed undervoltage operation, and the time-delay device must be selected for the corresponding release voltage.
Trusted Undervoltage Protection for ABB Circuit Breakers
ABB SACE Emax 2 electrical accessories provide modular protection and control functionality for modern low-voltage distribution systems, with YU undervoltage releases helping ensure predictable circuit-breaker operation when control voltage is lost or significantly reduced.
