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#71895 - 11/09/06 10:16 PM electrical interlock elevator switch  
Cinner  Offline
Member
Joined: Dec 2004
Posts: 78
Kelowna, B.C., Canada
Can someone tell me what application an electrical interlock would have on a 200 amp elevator disconnect switch?


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#71896 - 11/09/06 11:20 PM Re: electrical interlock elevator switch  
NJwirenut  Offline
Member
Joined: Sep 2001
Posts: 806
Bergen County, NJ
What do you mean by an "electrical interlock"?

A solenoid that prevents the switch from being thrown? That might prevent the power from being turned off when the elevator is between floors.


#71897 - 11/09/06 11:30 PM Re: electrical interlock elevator switch  
scameron81  Offline
Member
Joined: Feb 2004
Posts: 75
Healdsburg, ca, USA
The interlock is required for hydraulic elevators with automatic recall. When the power goes out the elevator automatically returns to the first floor and lets the passengers out. When working on the system and you turn off the disconnect for the sake of safety you don't want the elevetor moving down to the first floor. When the NC mechanical interlock opens it tells the elevator not to recall to the first floor even though the power is out. It has been a while since I have done an elevator but I am pretty sure thats the reason behind it.



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