milemaker13
Senior Member
- Location
- Suburbs of Chicago
Hi,
I have been asked to design a control circuit for a ventalation system at my plant. The system will have 2 identical intake fans(4.8a @ 480, 3hp), 4 identical circulation fans(1.5a @ 480, 1/2hp) and one exhaust fan(7.6a @ 480, 5hp). I have seperate starters for the intake fans, and a VFD for the exhaust fan, but my question is about the 4 circulation fans.
These are just simple wall mounted fans moving ambiant air across a room. They do not have any thermal motor protection built in. All 4 of these fans will come on together.
Is there anyway to get away from buying 4 seperate motor starters in order to reduce cost? I have thought of using a single contactor and 4 seperate overload blocks, but it really isn't much cheaper than just using 4 starters. Can I use a contactor and 4 seperate fuse blocks? Would a single VFD be able to handle 4 fans in some way? Any thoughts or ideas would be great. Otherwise, we will just go ahead with 4 seperate starters. Thanks-
I have been asked to design a control circuit for a ventalation system at my plant. The system will have 2 identical intake fans(4.8a @ 480, 3hp), 4 identical circulation fans(1.5a @ 480, 1/2hp) and one exhaust fan(7.6a @ 480, 5hp). I have seperate starters for the intake fans, and a VFD for the exhaust fan, but my question is about the 4 circulation fans.
These are just simple wall mounted fans moving ambiant air across a room. They do not have any thermal motor protection built in. All 4 of these fans will come on together.
Is there anyway to get away from buying 4 seperate motor starters in order to reduce cost? I have thought of using a single contactor and 4 seperate overload blocks, but it really isn't much cheaper than just using 4 starters. Can I use a contactor and 4 seperate fuse blocks? Would a single VFD be able to handle 4 fans in some way? Any thoughts or ideas would be great. Otherwise, we will just go ahead with 4 seperate starters. Thanks-