1SDA050159R1 ABB Emax E1–E6 / Tmax T8 Additional Shunt Opening Release 48V AC/DC

Why Choose the ABB 1SDA050159R1 Emax Additional Shunt Opening Release?

The ABB 1SDA050159R1 is an additional 48 V AC/DC shunt opening release designed for compatible ABB SACE Emax E1–E6 and SACE Tmax T8 circuit breakers. Identified by ABB as SHUNT OPEN.RELEASE ADDITIONA 48V E1/6-T8, it provides an electrically operated method of remotely opening the circuit breaker.

Also designated as the YO2 second shunt opening release, the 1SDA050159R1 operates from a 48 V AC/DC control supply. When the appropriate control voltage is applied, the release actuates the breaker opening mechanism, enabling remote trip commands from switchboard controls, protection systems and industrial automation equipment.

As part of the ABB SACE Emax / New Emax accessory range, this additional opening release provides supplementary electrically initiated tripping capability. It is suitable for installations where a second independent opening command is required for remote control, automation, protection or emergency shutdown functions.

Key Advantages

• Provides remote electrical opening of compatible circuit breakers.
• Operates from a 48 V AC/DC control supply.
• Designed as an additional / second shunt opening release (YO2).
• Suitable for compatible ABB SACE Emax E1–E6 and Tmax T8 breakers.
• Supports automation, protection, remote trip and emergency shutdown functions.
• Genuine ABB accessory engineered for integration with ABB low-voltage circuit breakers.

Key Features

• ABB SACE circuit breaker accessory.
• Additional shunt opening release.
• YO2 second opening release function.
• 48 V AC/DC supply voltage.
• Suitable for compatible Emax E1–E6 and Tmax T8 circuit breakers.
• Electrically actuates the breaker opening mechanism.
• Suitable for remote and automated trip commands.
• Manufacturer designation: SHUNT OPEN.RELEASE ADDITIONA 48V E1/6-T8.
• ABB order code 1SDA050159R1.

48 V AC/DC Additional Remote Opening for ABB Switchgear

Remote circuit breaker opening is essential in switchboards where protection or control systems must disconnect a circuit without direct manual operation. The ABB 1SDA050159R1 converts a compatible 48 V AC/DC electrical command into mechanical actuation of the circuit breaker opening mechanism.

Because the accessory is designed as an additional shunt opening release, it provides a supplementary trip input alongside the breaker's primary operating functions. This makes it particularly useful for installations requiring independent remote trip paths for automation, protection, process control or emergency shutdown systems.

Typical Applications

• ABB SACE Emax E1–E6 air circuit breaker installations.
• Compatible ABB SACE Tmax T8 circuit breaker installations.
• Remote circuit breaker opening and tripping.
• 48 V AC/DC switchboard control circuits.
• PLC and industrial automation systems.
• Emergency shutdown and protection circuits.
• Industrial and commercial low-voltage power distribution systems.