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Emc Testing With Vfds

Posted by marke in Marke's Rants, 01 January 2012 - - - - - - · 1,452 views

Most European and Australasian countries require that VFDs are tested to comply with EMC standards.
USA and Asian countries do not have this requirement.

The tests are prescribed as a requirement for CE compliance (Europe) and CTick compliance (Australia and New Zealand).

The laboratory tests require two types of emissions be tested, 1) radiated emissions...
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Motor Kilowatts

Posted by SBsparky in SBsparky's Blog, 05 August 2009 - - - - - - · 1,511 views

Hi guys

Can someone please explain to me is a 3 phase motor running off a VSD at half speed (25hz) still able to produce its rated nameplate kilowatts?




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Split Phase

Posted by vitaeng in vitaeng's Blog, 20 July 2009 - - - - - - · 1,607 views

Hi,
I have a pump which is 480V single phase (Split Phase). I have been asked to change the starter on this pump. At present there is a manual starter on the wall. You put it in start and when the motor is up to speed you switch it to run. There is a big capacitor box connected separately. Does anyone know of any starters available for this system with...
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Induction Motor Generation

Posted by simonc in Induction Motor Generation, 28 August 2007 - - - - - - · 1,439 views
Generation

I have been asked to try and get a 250kW induction motor pump-set to generate by running it backward.  The theory is fine and covered by a few articles on this site, but there are a couple of problems I would like some help with please!

At the motor terminals there are capacitors connected across the phases and an adjustable 3 phase load bank.

The...
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