Application Scenarios

In a large commercial building’s main low-voltage distribution room, the Emax E1B 1600A​ incoming circuit breaker needs to be integrated into the Building Management System (BMS). The SPA‑YO‑YC​ module is installed on the breaker. During a fire alarm, the BMS sends a signal to the YO​ coil to instantly trip the breaker for fire isolation. After the all-clear, the YC​ motor is energized remotely to reclose the breaker, restoring power without sending staff to the switchroom.

 

Parameter

Main Parameters	Value/Description
Product Model​	ABB SPA‑YO‑YC​ (Ordering Code: 1SDA038292R1)
Manufacturer​	ABB
Product Category​	Circuit Breaker Accessory (Combined Shunt Release & Closing Module)
Compatible Series​	ABB SACE Emax (E1, E2, E3, E4, E6 frames)
Operating Voltage​	24–30 V AC/DC​ (Universal control voltage)
YO (Shunt Trip)​	Electromagnetic release, instantaneous action on voltage application
YC (Closing Motor)​	Motorized spring charging mechanism for electrical closing
Auxiliary Contact​	Includes signaling contacts for “Breaker Open/Closed” status
Insulation​	≥100 MΩ (Dielectric resin housing)
Operating Temp.​	-25 °C to +70 °C​ (Industrial grade)
Weight​	Approx. 0.25–0.5 kg

 

 

Technical Principles and Innovative Values

The SPA‑YO‑YC​ solves the problem of remote control and automation for critical power distribution circuits.

• Innovation Point 1: Dual-Function Integration:​ Unlike separate accessories, this module combines the trip (YO)​ and close (YC)​ functions in a single, factory-aligned package. This reduces wiring complexity, saves panel space, and ensures mechanical compatibility, eliminating the risk of misalignment between separately installed components.
• Innovation Point 2: Universal Voltage Design:​ The module operates on a wide range of 24–30V AC/DC. This flexibility allows it to be powered directly from standard industrial control power supplies (24V DC) or from common AC control transformers, making it adaptable to virtually any existing plant control scheme without needing an external power converter.
• Innovation Point 3: Safety Interlock Logic:​ The internal mechanism includes critical interlocks. The YC​ closing motor circuit is designed to prevent recharging or closing if the breaker is already in the “ON” state, protecting the mechanism from damage. Similarly, the YO​ trip is a “safety-first” function that overrides any control logic to ensure rapid disconnection.

 

Application Cases and Industry Value

A water treatment plant’s high-voltage (10kV) to low-voltage transformation system uses an ABB Emax E2​ breaker as the main tie. A fault in the control circuit caused the original separate YO and YC units to fail intermittently, leading to unreliable automatic transfer schemes (ATS). Replacing them with the integrated SPA‑YO‑YC (1SDA038292R1)​ simplified the wiring, provided a single point of maintenance, and restored reliable automatic switching between transformer sources. This ensured continuous plant operation and reduced the risk of downtime due to control accessory failure.