Recent content by olicg

Aditya, One of the most important thing is the local support for your system. Price will come next in my books. It is also vital that you know what PD testing techniques are employed by manufacturers. Some systems are good if you have past history, some are good if you install them on new...

In IEEE Color Book series, there is one in particular on Distribution IEEE - 141. This nearly 800 page book/standard is an excellent document to read.

Belanz, I would like to know which equipment do you use for PD testing? Does your company make test sets? Olic

I have used KELMAN Transport X. Its an excellent device which is maintenance free when you compare it with a GC. Moreover, unlike GC, Kelman PAS technology has made DGA a very portable and compact instrument. It can be easily moved around. I also agree with ausphil that its an ecellent device...

I am interested in knowing the exact technical limitations of digital TTR sets. What specifications i should ask for when i want to test 1 MVA to 500 MVA power transformers from 3.3 KV voltage upto 500 KV.

Thanks stevenal. its A. B. Chance.

Autocad is just a drawing software. If you talk specifically about design softwares which have modules for panel drawings, SLDs, etc and give you help in design and calculations, then you need to look at following: ETAP EDSA SKM Power Tools PSS/e or now PSS/SINCAL NEPLAN DIGISILENT These are...

Hubbel Inc. USA; i could not recall one of Hubbel companies that make portable earthing equipment. Boddington Electrical USA

1 & 2. The frequency depends on current state of the winding, machine age, PD activity levels, etc. If you have carried out tests recently, you can decide based on the results. For newer machines upto 5-8 years in service life without severe signs of PD (during your initial testing and physical...

belanz, thanks for the reply. Like you i am also a big supporter of PD testing. Over the years i have been involved in PD testing of rotating machinery using commercial instruments from Adwel, Power Diagnostix and Lemke. I agree with what someone has written above that PD testing is more...

Generator emf/voltage is given by the equation: Emax = 2 * pi * B A N f Now 2, pi, A, B, N are all constants for a given machine. So we can conclude E directly proportional f or E/f is constant. This is mathematical expression. For a given machine with a certain magnetic flux density...

This is a great discussion mostly focussed on cable testing. There are few areas which should be dicussed as well: 1. How close will the PD results from factory and those of field in harsh noisy environment match and how can they be compared with each other? To me PD testing and evaluation is...

This is quite interesting. Views from field guys show that they have more FAITH in hand cranked units. Interesting or rather striking thing is that even with advancement of digital technology, there are instruments from older days still preferable and mainly because of higher reliability and...

You may also look at www.infratek-ag.com. They have two models which i know: 106A and Infratek 31 Hand Held. These are economical as well. Olic

Hi, I would like to know the relative advantages / disadv of hand cranked v Digital TTR sets available from various vendors. Any document would be of real help. Reply with points is also appreciated. Thanks in Advance, Olicg