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Shunt release (for power circuit breaker)
Shunt releases are critical auxiliary components designed for remote tripping of power circuit breakers, including molded case circuit breakers (MCCBs) and air circuit breakers (ACBs). These devices operate by receiving an external control signal—typically from a push button, relay, or automation system—to energize an internal solenoid that mech...
Shunt releases are critical auxiliary components designed for remote tripping of power circuit breakers, including molded case circuit breakers (MCCBs) and air circuit breakers (ACBs). These devices operate by receiving an external control signal—typically from a push button, relay, or automation system—to energize an internal solenoid that mechanically releases the breaker's latching mechanism. Key technical parameters include rated control voltages (e.g., 24 VDC, 110 VAC, 230 VAC), power consumption (often in the range of 200-300 VA for AC versions), and insulation voltage ratings. Shunt releases are available for both AC and DC control circuits, with specific models designed for instantaneous or delayed tripping. They are commonly integrated into distribution panels and motor control centers to enable emergency stop functions, remote shutdown, or automated load shedding.
These devices are predominantly installed in industrial switchgear assemblies, power distribution boards, and building management systems. Typical applications include emergency power-off (EPO) systems in data centers, fire alarm interlocking circuits, and process control networks in manufacturing plants. In commercial buildings, shunt releases facilitate compliance with safety codes by allowing remote disconnection of non-essential loads during generator testing or maintenance. They are also essential in renewable energy installations, such as solar farms, where rapid disconnection of inverters is required for grid protection.
Within our catalog, shunt releases are categorized by compatible breaker series and voltage ratings. Key subcategories include releases for MCCBs (e.g., for 3P and 4P frames up to 1600 A) and ACBs (for frames up to 6300 A). Common article codes follow patterns like "SHT-24VDC-XXX" for DC versions or "SHT-230VAC-XXX" for AC models, where XXX denotes the breaker frame size or series. We stock releases from leading manufacturers, covering standard voltages from 12 VDC to 480 VAC, with options for undervoltage release (UVR) combinations.
Partnering with Electric Automation Network ensures access to genuine shunt releases with full technical documentation, including wiring diagrams and trip curves. Our engineers provide personalized support for selecting the correct voltage and mechanical interface for your specific breaker model. We offer express worldwide shipping, real-time pricing, and multilingual technical datasheets to streamline procurement and installation."
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