3-phase power analyzers for low power-factor measurements 3

[edison123]

I am looking for good quality 3-phase analyzers for measuring power and power factor accurately in a very low pf (0.1 to 0.3 typical) environment (testing a wide range of LV and MV motors on no-load, short-circuit etc.).

Any recommendations/suggestions ?

 

[edison123]

A budget cost for such analyzers will also be appreciated.

 

[ScottyUK]

Hi Kumar,

I highly recommend Voltech's PM3000 analyser. I have used these for about 12 years and while it's no longer their flagship model it is still a damned good instrument. Cost when I last bought one was about 6k GBP, and looking at their website it has only gone up 200 GBP in the four or five years which have passed. I can't comment from experience on the newer PM6000 but on paper it looks excellent.

Spec is on the back page:

http://www.voltech.com/downloadfiles/brochures/PM3000ACE Brochure (86-264).pdf

Voltech in Abingdon, UK used to have some very good technical guys - might be worth a call.


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If we learn from our mistakes I'm getting a great education!

 

[edison123]

Hi Scotty. Thanks for the tip.

PM3000 ACE sure packs a lot. I will get in touch with them.

 

[ScottyUK]

Hi Kumar,

Voltech used to extoll the virtues of their instruments in transformer testing where the no-load PF is close to zero lagging.

http://www.voltech.com/support/articles/79/Testing Power Transformers (86-055).PDF

I have never used this mode so I won't comment further.


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If we learn from our mistakes I'm getting a great education!

 

[prc]

In this part of the world, we use Norma ,Austria model D6000 for transformer mesurements. Seems Norma was taken over by Fluke.Yokogawa Japan also have models with which I have no experience.

 

[edison123]

Thanks scotty and prc.

0.01 pf of trafos on no-load ? Is it a tall claim ?

prc, as a trafo expert, would agree with that voltech statement ?

 

[sibeen]

I'd also have to give a thumbs up to the Voltech gear. I first used it back in about 1989 and always found it easy and intuitive to use.

 

[edison123]

sibeen. Thx for the thumbs-up for voltech.

 

[prc]

edison123, it is wrong statement.No-load pf of today's transformers are as high as 0.5-0.8!But the pf is very low when we measure load loss, as low as 0.01-0.02 for large power transformers.

 

[edison123]

Thx prc for confirming my doubts about 0.01 pf on no-load.

I wonder how voltech made a claim like that.