Elevator motor

Status
Not open for further replies.

olc

Senior Member
A typical hydraulic elevator with a 20HP code F motor. 72A running and 166A start up.
The question is - is the 166A start up just the normal motor start current or is it something that should be taken in account for:
1. circuit size?
2. generator sizing?
3. voltage drop?
 

Jraef

Moderator, OTD
Staff member
Location
San Francisco Bay Area, CA, USA
Occupation
Electrical Engineer
A typical hydraulic elevator with a 20HP code F motor. 72A running and 166A start up.
The question is - is the 166A start up just the normal motor start current or is it something that should be taken in account for:
1. circuit size?
2. generator sizing?
3. voltage drop?


Normal startup, actually a little low (72 x 600% = 432A would be "normal" starting current), but most likely your meter is too slow to see the real value. Nothing to worry about, no special considerations needed. But if you are running off of a generator, the surge capacity of the generaqtor must be able to handle this. The generator mfr would be the ones to discuss that with.

Actually, 72A is high for a 20HP 3 phase motor, even if it is 208V. Should be around the 54-59A range.
Is it single phase? 20HP is a lot of horses for a single phase motor...
 
Last edited:

olc

Senior Member
The numbers (72A running and 166A start up) are from the elevator manufacturer's product data (Otis).
 
Status
Not open for further replies.
Top