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- since 1996 -

Zawada NDT
Suppliers of instruments to test steel wire ropes in-situ, using magnetic, non-destructive method.

232 views
Technical Discussions
Jaques Townsend
NDT Inspector
ULTRASOM Logística Townsend & Rocha Almeida Serviç, Brazil, Joined Mar 2001, 13

Jaques Townsend

NDT Inspector
ULTRASOM Logística Townsend & Rocha Almeida Serviç,
Brazil,
Joined Mar 2001
13
09:32 Aug-24-2005
UT at insolation integrity detecting criterea

Can some one help me by sending what will be the range scaning when at isolators integrity checking by using the ultrasound dectector like follows:
at high voltage between 13,8kV & 138kV our great difficult is to stabilish the inspecting criterea, by the way at now we`re using:
at 7 dBmV to 0 dBmV ----- good isolator
at 1 dBmV to 10 dBmV ----- needing ground isolation measure soon as possible
more than 10 dBmV ---- imediatly repair or replacement
Can you send me more informations about measurement criterea to Corona effect limits?
Thank you.




    
 
 

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