Rescloser Settings
Rescloser Settings
(OP)
How to Decide Target Reset Setting for Reclosers?
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RE: Rescloser Settings
Most likely they do, therefore automatic target reset is turned off.
RE: Rescloser Settings
RE: Rescloser Settings
RE: Rescloser Settings
As an intern, you should have a more experienced engineer to assist you. If not, your employer should retain an engineering consultant to do the recloser settings and have you work with him to learn the procedures.
If your employer does not agree to one of these approaches, I suggest you start looking for a better employer.
RE: Rescloser Settings
You can order Cooper Power Systems' book "Electric Distribution System Protection" online for $50
by first registering at http://w
RE: Rescloser Settings
We set ours to reset automatically upon successful reclose. If the device goes to lockout, the targets remain. Otherwise, it has been our experience that when you DO have a lockout condition, your targets will ALL be flagged from last weeks lightning storm and meaningless for the present condition.
Now, if you are talking about when to reset the timing function that takes the device to lockout, I'd like to ask the same question. I've taken the Cooper course (albeit a long time ago) and several others. Maybe I was in the bathroom at the time, but I've never gotten a good explanation on this re-set timing feature and how it should relate to up and downstream devices. We've always set ours at 60 seconds based on the fngineering concept of "we always done it that way".
If this is not the question, then ignore it. I'm not trying to hijack csuf's thread.
RE: Rescloser Settings
Most distribution faults are caused by birds, small animals, branches or lightning.
The resetting time is set for 2 to 20 seconds to allow a branch or small carcass enough time to fall clear. The recloser then recloses, and if the fault is still present, reopens in a few cycles. This may be repeated one or two times.
The next common cause of distribution faults is failed transformers. The recloser, on the third or fourth reclose will stay on for longer (8, 10 or more cycles) so as to allow (or cause) the primary fuse of a faulted transformer to open. This may be repeated once or twice. If the fault is still present, the recloser will stay open. Total reclosing before lockout, 3 to 5 times.
I have always seen the "closed" timing given in cycles.
respectfully
RE: Rescloser Settings