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Problem With Nokian Pf Controller N-12


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#1 AB2005

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Posted 03 March 2010 - 10:53 AM

Dear Friends,

I have Nokian PF controller N-12 in PFI improvement plant in main distribution board which rating is 3500A currently supplying only 500-700A. Capacitors are connected in following sequence;
• Stage 1 & 2 50KVA
• Stage 3 - 6 100KVA
• Stage 7-12 150KVA

System had been working well but this time I have been facing a problem that Nokian PFC switches ON the stages step by step and when PF reaches at 0.95-98, it switches OFF the all stages and PF drops at 0.6-.7. PFC has been continuously repeating that sequence. Can any body help me out?.

"Don't assume any thing, always check/ask and clear yourself".

#2 jraef

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Posted 04 March 2010 - 06:22 PM

QUOTE (AB2005 @ Mar 3 2010, 02:53 AM) <{POST_SNAPBACK}>
Dear Friends,

I have Nokian PF controller N-12 in PFI improvement plant in main distribution board which rating is 3500A currently supplying only 500-700A. Capacitors are connected in following sequence;
• Stage 1 & 2 50KVA
• Stage 3 - 6 100KVA
• Stage 7-12 150KVA

System had been working well but this time I have been facing a problem that Nokian PFC switches ON the stages step by step and when PF reaches at 0.95-98, it switches OFF the all stages and PF drops at 0.6-.7. PFC has been continuously repeating that sequence. Can any body help me out?.

Sounds like a software glitch in the controller. Have you tried contacting Nokian?
"He's not dead, he's just pinin' for the fjords!"

#3 AB2005

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Posted 05 March 2010 - 04:32 AM

QUOTE (jraef @ Mar 4 2010, 11:22 PM) <{POST_SNAPBACK}>
Sounds like a software glitch in the controller. Have you tried contacting Nokian?


No. Now I send the mail to Nokian.
"Don't assume any thing, always check/ask and clear yourself".

#4 Hanshuang

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Posted 10 March 2010 - 02:32 AM

Probably a protection founction of the controller been actived , such as harmonic over limit, especially the compensation without detuned recator.




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