Shunt Trip Breaker For Elevator

In the case of elevators a shunt trip breaker is installed so that the fire alarm can send a signal to the shunt trip breaker to interrupt the flow of electricity to the elevator.

Shunt trip breaker for elevator. A shunt trip breaker is a normal overload circuit breaker with the addition of an external electromagnetic coil that also allows for remote tripping of the breaker. Elevator shunt trip fire alarm requirements here are the requirements for heat detector placement monitoring of power and wiring diagram from 1999 nfpa 72. For example shunt trip breakers are used in elevators. Elevator shunt trip is a function that involves shunting the breaker that controls the elevator equipment prior to the release of the automatic sprinkler systems.

Elevator shunt trip wiring can be confusing as it is required to be outside the elevator machine room and monitored for the presence of operating voltage. 3 941 where heat detectors are used to shut down elevator power prior to sprinkler operation the detector shall have both a lower temperature rating and a higher. Elevator shutdown frequently referred to as shunt trip is intended to immediately stop elevators before water from elevator machine room or hoistway sprinklers affects brakes and electrical equipment. This procedure is completed via the activation of heat detectors addressable or conventional connected to the building fire alarm system or dedicated function elevator control panel.

This is typically accomplished via a shunt trip device. In these cases a shunt trip breaker is installed in the circuit feeding the elevator controls and the fire alarm system sends a trip signal if it detects waterflow from the sprinkler system.