Shunt Trip Breaker For Elevator

Shunt tripping where the elevator shaft andor equipment room has a sprinkler fire suppression system installed the elevator code requires main line power to the elevator be removed prior to the application of water. 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.

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.

You can find out more Diagram below

Shunt trip breaker for elevator. 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. This diagram can help clear up the wiring in of fire alarm modules and relays. This is typically accomplished via a shunt trip device.

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. 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. 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.

For example shunt trip breakers are used in elevators. Elevator shunt trip fire alarm requirements here are the requirements for heat detector placement monitoring of power and wiring diagram from 1999 nfpa 72. 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.

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. Both wet brakes and wet electrical equipment can cause erratic life threatening elevator operation.