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VLF Dead break terminations

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  1. Kalbi_Rob's Avatar
    Kalbi_Rob is offline Experienced Member
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    Quote Originally Posted by tcoupekyle View Post
    Hey! Yeah that's what we decided to do build another and a stress cone to try it.
    That's exactly what we been looking for. Is that how you normally test these?
    I've always just used the half splice and hadn't had issue until now. But maybe in the past it was all lower voltage. In Maintenance situations.
    We found around 37-42 KV (based on weather) open Pass-Thru Bushings start to arc. That was before we learned (like you are now) that we needed to produce a proper rig to test.
    We contracted a MV splicer to create 3 ft t-body cables and put lug terminals at the other end for our cable connections, since we could easily attach corona suppression balls on the end along with our test cable.

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    Quote Originally Posted by Kalbi_Rob View Post
    We found around 37-42 KV (based on weather) open Pass-Thru Bushings start to arc. That was before we learned (like you are now) that we needed to produce a proper rig to test.
    We contracted a MV splicer to create 3 ft t-body cables and put lug terminals at the other end for our cable connections, since we could easily attach corona suppression balls on the end along with our test cable.
    Exactly.

    In addition, its important to keep the various test rigs that you make clean and in good shape. You dont want to remove a customers new clean silicone coated T-Body and plug in a test jig that has been rolling around the back of your van for a month with dirt and sand stuck in the used silicone. It may pass the your VLF test but certainly wont last as long at it should when you plug the now dirty new T-Body into the transformer or switch after your done.

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  5. tcoupekyle is offline Junior Member Pro Subscriber
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    Quote Originally Posted by Kalbi_Rob View Post
    We found around 37-42 KV (based on weather) open Pass-Thru Bushings start to arc. That was before we learned (like you are now) that we needed to produce a proper rig to test.
    We contracted a MV splicer to create 3 ft t-body cables and put lug terminals at the other end for our cable connections, since we could easily attach corona suppression balls on the end along with our test cable.
    Thanks!

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  7. tcoupekyle is offline Junior Member Pro Subscriber
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    Finished

    We built a test rig similar to what you pictured. And testing went ultimately very well.
    Thank you all so much.

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