Does anyone make a VFD that'll do this?
Does anyone make a VFD that'll do this?
(OP)
I'm looking for a VFD (pump application, so variable torque) that is NEMA 4 (Washdown or similar), 208V 1 Phase input driving 3 HP load max. The trick is to have a drive that'll restart automatically w/o manual input and at the LAST KNOWN FREQ w/o having to resort to a separate POT or enclosure.
It seems most drives have 4 billion programmable features, but a simple LAST KNOWN FREQ function is not present. Also, most drives appear to require hardwiring of auto restart, which is ok, but they also require a pot. to be wired also to provide FREQ reference info. Then you have to get a separate enclosure for the pot!
If anyone knows of one, please let me know. Thanks.
It seems most drives have 4 billion programmable features, but a simple LAST KNOWN FREQ function is not present. Also, most drives appear to require hardwiring of auto restart, which is ok, but they also require a pot. to be wired also to provide FREQ reference info. Then you have to get a separate enclosure for the pot!
If anyone knows of one, please let me know. Thanks.





RE: Does anyone make a VFD that'll do this?
RE: Does anyone make a VFD that'll do this?
We spec'd some smaller drives about 3 years ago and due to the heat and humidity (fish wholesaler in Atlanta), the NEMA 1 drives failed prematurely.
Does that help?
RE: Does anyone make a VFD that'll do this?
The tightest enclosure available is NEMA 12, however. For washdown or NEMA 4, you will need to put it in a suitable enclosure.
As far as 208V single phase, you can use a 230VAC rated drive and double the output amp rating for a single phase input. That would probably be a 7.5hp unit.
Being new to this board, it occurs to me that this might be interpreted as product or brand promotion. I don't know how else to answer a question such as in this thread. If this kind of response is unacceptable, please advise and there will be no more.
RE: Does anyone make a VFD that'll do this?
RE: Does anyone make a VFD that'll do this?
http://www.thomasregister.com
and type Drives: Variable Frequency under Product or Service, which will return 73 companies to approach to for the desired features
RE: Does anyone make a VFD that'll do this?
Good Luck
Barry1961
RE: Does anyone make a VFD that'll do this?
I was hoping this wouldn't be a research project, but it appears it's gonna be.
RE: Does anyone make a VFD that'll do this?
The Taian E2 Series VSD sounds like the Drive you are looking for. Single Phase input, IP65 - Nema 4 enclosure rating, 3HP, 3 Phase output, Auto Restart etc.
Sorry about the commercialism but it sounded like you were having trouble finding what you really needed.
Cheers
JTC
RE: Does anyone make a VFD that'll do this?
RE: Does anyone make a VFD that'll do this?
RE: Does anyone make a VFD that'll do this?
You could also look at Control Techniques. They have an IP65 dirve family also that would meet you requirements.
If you have difficulty finding the data, drop me a line and I will see what I can find. - I have something somewhere.
Best regards,
Mark Empson
http://www.lmphotonics.com
RE: Does anyone make a VFD that'll do this?
"Venditori de oleum-vipera non vigere excordis populi"