ABB 1SDA073672R1 Shunt Opening Release (YO)

Key Features

• Remote Electrical Tripping – Enables opening of the circuit breaker from a remote control panel, PLC, or SCADA system without manual intervention

• Universal Voltage Compatibility – Rated for both AC and DC applications at 110–120 V, simplifying inventory and reducing spare parts variants

• Wide Breaker Compatibility – Designed for SACE Emax 2 (E1.2, E2.2, E4.2, E6.2) and Tmax XT7/XT7M frames

• Fast Response – YO opening time of approximately 20 ms for XT7/XT7M frames

• Continuous or Pulse Operation – Minimum pulse duration of 100 ms; continuous energization also supported

• Factory-Fitted Accessory – Direct mounting to the breaker mechanism, no external adapters required

Technical Specifications

Core Advantages

1. Remote Trip Capability for Automated Systems

The YO release converts an electrical control signal into a mechanical tripping action, allowing the circuit breaker to be opened remotely from a control room, PLC, or SCADA system. This is essential for emergency shutdown systems where immediate de-energization is required without personnel proximity to the breaker .

2. Universal AC/DC Voltage Design

Unlike some releases that require separate AC and DC variants, the 1SDA073672R1 operates on both 110–120 V AC and 110–120 V DC. This reduces inventory complexity and ensures the correct spare is available regardless of the control power source in your facility .

3. Broad Breaker Compatibility

One part number serves multiple breaker families: the SACE Emax 2 air circuit breakers (E1.2 through E6.2) and the Tmax XT7/XT7M moulded case breakers. This compatibility simplifies maintenance planning for facilities using a mix of ABB breaker platforms .

4. Reliable and Proven Design

The YO release is a factory-engineered accessory from ABB, designed specifically for these breaker platforms. The 20 ms opening time ensures rapid response to control commands, while the 100 ms minimum pulse duration allows flexibility in the control signal source .

5. Essential for Safety Interlocks

The YO release is a key element in safety interlock schemes. When combined with the YC (shunt closing release) and the spring-charging motor (M), it enables full remote operation of the breaker, which is a prerequisite for automated transfer switching, generator synchronization, and protection coordination systems .

Applications

The ABB 1SDA073672R1 YO release is deployed across critical power distribution and control applications:

Recommended Models & Related Accessories

Note: The YO release is the opening coil. For remote closing, the YC shunt closing release is required. Both can be installed together on the same breaker for full remote operation.

What's Included

• 1 × ABB 1SDA073672R1 Shunt Opening Release (YO)

Note: Circuit breaker, YC closing release, spring-charging motor, and Ekip trip unit are sold separately.

Why Buy From Us?

• New and Original – Genuine ABB factory-fitted accessory

• In Stock – Ready to ship same/next business day

• Fully Tested – Each unit verified for functionality

• Warranty Included – Purchase with confidence

• Technical Support – Breaker compatibility assistance available

Frequently Asked Questions (FAQ)

Q1: What is the ABB 1SDA073672R1?

It is a Shunt Opening Release (YO) for ABB SACE Emax 2 and Tmax XT7/XT7M circuit breakers. It enables remote electrical tripping of the breaker by converting a control signal into a mechanical opening action .

Q2: What is the difference between YO and YC?

YO (Shunt Opening Release) opens/trips the breaker. YC (Shunt Closing Release) closes the breaker. The 1SDA073672R1 is a YO — it opens the breaker .

Q3: What voltage does this YO release operate at?

It operates at 110–120 V AC/DC — the same voltage for both AC and DC applications .

Q4: Which circuit breakers are compatible?

It is designed for SACE Emax 2 frames (E1.2, E2.2, E4.2, E6.2) and Tmax XT7/XT7M moulded case breakers .

Q5: How fast does the YO release trip the breaker?

For XT7/XT7M frames, the opening time is approximately 20 ms .

Q6: Can I use a continuous signal or do I need a pulse?

Both are supported. The minimum pulse duration is 100 ms. Continuous energization is also possible, but the breaker can only be re-closed after the YO signal is removed and a minimum of 30 ms has elapsed .

Q7: Does this YO release work with both AC and DC control power?

Yes. The 1SDA073672R1 is rated for 110–120 V AC/DC, covering both control power types with a single part number .

Q8: What is the power consumption of the YO release?

Continuous power consumption is 3.5 VA (AC) or 3.5 W (DC). Inrush power is 300 VA/W .

Q9: Can I install both YO and YC on the same breaker?

Yes. The YO (opening) and YC (closing) releases can both be installed, enabling full remote open/close operation when combined with a spring-charging motor .

Q10: Is this a genuine ABB product?

Yes. This is a new and original ABB factory accessory with catalog number 1SDA073672R1 .

Q11: What are the dimensions and weight?

Approximately 105 × 55 × 135 mm and 0.12 kg .

Q12: How do I test the YO release?

ABB offers a dedicated YO/YC test unit that verifies the operating continuity of the release at 24–250 V AC/DC, with cyclical testing every 30 seconds .