Elevator shunt trip disconnecting means

The requirements for elevator electrical “work by others” is a fairly simple scope but many times it is confusing for the electrician because they do not do this type of work on a regular basis. Recently we have been getting a lot of questions of how or when a shunt trip should be installed.

1.    A shunt trip shall be installed if there are heat detectors

2.    A heat detector shall be installed if there are sprinklers

3.    A smoke detector shall be installed if there is a heat detector

4.    A heat detector shall trip the breaker disconnecting the power from the elevator machine room.

5.    A shunt trip device does not necessarily need to be in the elevator machine room

6.    The shunt trip needs to be monitored by the fire panel

7.    The fire recall detector provider and electrician need to work together for heat detector/shunt installation

8.  There is an elevator control feature where the heat is wired to the elevator controller and it will let the car down on FEO prior to shunting the disconnect.  We do not want to trap people when the car is shunted.  This is not a popular feature yet but may gain traction.

[Sprinkler & heat = shunt]

[Shunt/disconnect in one]

[Shunt and disconnect separate]

If you have any questions or would like additional information feel free to contact me at CraigZ@colleyelevator.com or 630-766-7230 ext. 107.

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