Tuesday, January 29, 2013

Electric Emission Versus Resistance...


...The nuances of inspecting electric equipment

We have a user’s forum on LinkedIn and have seen some discussion there on ultrasound detection of electrical emissions.  There seems to be a bit of a misunderstanding about the use of ultrasound on electrical equipment.  While there are many who use the technology to monitor high voltage equipment, there are many more who don’t think it will be useful on mid and low voltages.  In fact ultrasound inspection can be performed on all voltages.  The qualifying factor is the presence or absence of ultrasound.  On voltages below 440 the type of emissions present will be either tracking or, more often arcing.  On mid level voltages, tracking and arcing will be detected and on voltages above 1000, corona can be thrown into the mix.  What confuses people is that there are a variety of issues that can pop up, some such as arcing, tracking and corona will produce detectable ultrasound while others that are related to resistance issues will generate heat but not ultrasound.  If you know your system and your use both infrared and ultrasound technologies your chances of detecting a potential problem increases.  If you rely just on infrared to detect heat related issues you’ll still be successful, but you are open to the potential of missing an issue such as tracking or even early stages of arcing where there is not a sufficient detectable heat differential.  More importantly, as a safety issue, many infrared users defer to ultrasound as part of a procedure when inspecting enclosed equipment before opening panels.  In fact ultrasound is an important component to inspection of lower voltage enclosed panels.  There are many panels that have voltages of 480 or below.  Even with IR windows there are some issues that might be considered hidden from view.

What about your experiences?  How many of you have been using ultrasound to detect electrical emissions?  What voltages and what types of problems have you found? Send us an email to maureeng@uesystems.com and we'll feature your findings in a future post. 

For a great webinar on analyzing electrical faults, we suggest you view Joe Gierlach’s presentation: “Analyzing Electrical Sound Files”  

Alan Bandes
abandes@att.net

20 comments:

  1. thanks for this awesome web page, i like it alat bantu sex

    ReplyDelete
    Replies
    1. It’s hard to find knowledgeable people on this topic, but you sound like you know what you’re talking about! Thanks Information Webpage
      Website

      Delete
  2. Aktivitas seksual melibatkan alat bantu sex didalam nya demi kepuasan bersama pasangan tentu akan lebih menyenangkan, Saat ini banyak sekali mainan sex atau seks toys yang dapat di pilih sesuai dengan keinginan, mulai dari alat sex sederhana hingga yang bentuk nya fullgar juga ada anda tinggal memilih nya disini toko > alat bantu sex pria dan wanita

    ReplyDelete
  3. I am happy to see my information right on this page, by his last this page I became more widely understood, for that I can only give thanks.
    My blog sex aids

    ReplyDelete
  4. Nice post. I learn something more challenging on different blogs everyday. It will always be stimulating to read content from other writers and practice a little something from their store. I’d prefer to use some with the content on my blog whether you don’t mind. Natually I’ll give you a link on your web blog. Thanks for sharing. Hauori.com E-booking.com Agri-life.net

    ReplyDelete
  5. Hello! I just would like to give a huge thumbs up for the great info you have here on this post. I will be coming back to your blog for more soon. Website Information

    ReplyDelete
  6. I love it. I hope that more and more Blogger will use this feature in the future, because it just makes the internet better I think!
    Ind Vs WI Test Highlights
    Fifa Futsal World Cup 2016 Highlights

    ReplyDelete
  7. what I have read on this page is enough to make me satisfied can menik die this article thanks greetings from me. WWW.BARUOBATKUAT.COM
    alat bantu sex pria
    alat bantu sex wanita

    ReplyDelete
  8. Very well written admin and I love to read more info, so keep updating we will happy to visit again and again to your blog... Best
    French Open Live

    ReplyDelete
  9. Cách sử dụng thuốc Fucoidan chống ung thư, cụ thể là sản phẩm Doctor’s Best Fucoidan rất đơn giản, thuoc fucoidan gia bao nhieu liều dùng Fucoidan chỉ cần uống 2 viên mỗi ngày trong hoặc sau bữa ăn. Thuốc Fucoidan có mấy loại thư Sản phẩm đã được FDA kiểm nghiệm, đáp ứng các tiêu chuẩn gắt gao về chất lượng và độ an toàn tuyệt đối. Công dụng của thuốc FucoidanHiện Doctor’s Best Fucoidan được bán tại muathuoctot.com với giá tốt chỉ 800.000 đồng/hộp 60 viên. Thuốc Fucoidan Doctor's Best Best Ngoài ra các bạn có thể dùng thuốc Fucoidan Nhật Bản cũng rất được ưa chuộng .

    ReplyDelete
  10. Awesome to see your site. Keep up the great work. Thanks for all you could do.Lets stay in touch
    Australia vs Pakistan 4th ODI Score, Ball by Ball Live Commentary
    Indian Jersey Image Picture 2017

    ReplyDelete