High Temperature Soft Starter 1

[sferrari]

Can anyone make suggestions for soft starters that tolerate high heat and a bit of dirt? I need one for a 100 hp 3P 480V motor on an agricultural well in Arizona. Record high temp in the area where this would be installed is 124F.

I found a WEG that will tolerate 55C but I'd still like suggestions. I've been cruising your forum for a while and it seems like there are a lot of big brains on here.

I'm new to the forum so please excuse my ignorance of forum etiquette.

Thanks in advance.

Steven

 

[davidbeach]

The utility has one chance to tell the customer what needs to be done and that answer has to suffice for all system configurations and for the rest of time. Can't go back and tell the customer that they've got to change starting methods later when something happens. Maybe that motor can be started across the line without adverse impact 90% of the time, but 10% of the time the feeder is in a different configuration and rather than being close to the substation with a strong source it's at the end of a different feeder from a different station with a weaker source. Unlike most commercial/industrial power systems that tend to stay the same for long periods of time, much of the utility distribution system is very dynamic in configuration. Most commercial/industrial power systems don't have to be prepared to deal with a car taking out a pole or a getaway cable failing and needing to routed around.

I’ll see your silver lining and raise you two black clouds. - Protection Operations

 

[itsmoked]

I believe the utilities have a legal requirement to deliver power to users without more than x% flicker. The only way to guarantee that is to limit the starting current hits from things like DOL motor starts of motors bigger than some size. They get to state a SS requirement for motors over xHP by simply pointing at their required flicker limits. Then they follow thru as davidbeach pointed out - forever.

Keith Cress
kcress -

http://www.flaminsystems.com