Exhaust Fan Situation !!!!

[Le7316]

Suppose you have an exhaust fan currently connected to 480V 3phase panel (20 amp 3pole breaker) and if I want to relocate to another building which only has 120/208V 3phase ...what would you do in this situation to make this exhaust fan works ? what are my options here ?

 

[ActionDave]

Suppose you have an exhaust fan currently connected to 480V 3phase panel (20 amp 3pole breaker) and if I want to relocate to another building which only has 120/208V 3phase ...what would you do in this situation to make this exhaust fan works ?

What ever it takes to get the job done.

what are my options here ?

Chances are the motor will run on the lower voltage if the windings are connected correctly. What does your electrician have to say about this?

 

[Le7316]

Let's say im going to replace the motor with 208v 3phase ( is there anything else I need to consider before the replacement ? ) or get one of the boost transformer ... which one you recommend ?

 

[Volta]

As ActionDave suggested, have you looked at the motor? Many will allow reconfiguring of the leads to work at the lower voltage.

 

[mgookin]

Search online for a manual for that motor model number. It will tell you what you can do with it.

 

[Jraef]

If you simply change voltage connections on your motor, your motor starter size may end up being too small. If you add a transformer ahead of it, you must add a local disconnect for the transformer too. Either way, there are a number of code issues involved in this.

You are not an Electrician, are you?

 

[Le7316]

You are right im not an electrician but an EE (just graduated last year) so yes I don't have much experience like everyone here . I've been following up this forum for a while and decided to join yesterday so I can ask & learn it from here...Anyways, I haven't got a chance to look at the data plate on the motor yet but I will soon if I can get someone to climb up there

 

[Volta]

Well, welcome! There is a great range of experience here, old-timers to people who haven't even started a career yet, but are considering these electrical trades.

 

[kwired]

You are right im not an electrician but an EE (just graduated last year) so yes I don't have much experience like everyone here . I've been following up this forum for a while and decided to join yesterday so I can ask & learn it from here...Anyways, I haven't got a chance to look at the data plate on the motor yet but I will soon if I can get someone to climb up there

Why can't you climp up there? You will be better informed of what is there if you see it for yourself than to trust what someone else thinks they saw. The experience will make you a better EE also.:happyyes:

 

[Le7316]

Why can't you climp up there? You will be better informed of what is there if you see it for yourself than to trust what someone else thinks they saw. The experience will make you a better EE also.:happyyes:

Hehe I'm not supposed to climb up there !!! The shop will do it ..I will be in trouble if I do it . Will update when I get the nameplate ...

 

[petersonra]

Suppose you have an exhaust fan currently connected to 480V 3phase panel (20 amp 3pole breaker) and if I want to relocate to another building which only has 120/208V 3phase ...what would you do in this situation to make this exhaust fan works ? what are my options here ?

If you can't rewire the existing motor to accommodate the new voltage it may well end up being less costly to just buy a new fan with the correct voltage motor rather than spend a lot of time trying to reuse something.

 

[Le7316]

This will be another option for this task but we'll see after I found out the nameplate .....