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Problem With Nokian Pf Controller N-12, Capcitors are switching ON and OFF |
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 Mar 3 2010, 10:53 AM
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#1
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Senior Member  Group: Full Member Posts: 301 Joined: 21-October 06 Member No.: 2,159  |
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".
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Mar 4 2010, 06:22 PM
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#2
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 Posting Freak Group: Moderator Posts: 669 Joined: 22-February 03 From: USA, California Member No.: 285 |
QUOTE (AB2005 @ Mar 3 2010, 02:53 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?. Sounds like a software glitch in the controller. Have you tried contacting Nokian? -------------------- "He's not dead, he's just pinin' for the fjords!"
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Mar 5 2010, 04:32 AM
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#3
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Senior Member Group: Full Member Posts: 301 Joined: 21-October 06 Member No.: 2,159 |
QUOTE (jraef @ Mar 4 2010, 11:22 PM) 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".
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Mar 10 2010, 02:32 AM
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#4
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Group: Members Posts: 1 Joined: 25-August 09 Member No.: 6,307 |
Probably a protection founction of the controller been actived , such as harmonic over limit, especially the compensation without detuned recator.
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Lo-Fi Version | Time is now: 3rd September 2010 - 04:51 PM |
