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Hydraulic Reclosers timing
2

Hydraulic Reclosers timing

Hydraulic Reclosers timing

(OP)
Can anybody tell me the minimum time between trips to allow the timing units to reset before restarting a test?  Using a McGraw-Edison "R" type recloser.

RE: Hydraulic Reclosers timing

Cooper's design duty cycle is 2 cycles standard (4 cycles with the special optional reclosing time).

RE: Hydraulic Reclosers timing

(OP)
Thanks for your thoughts fellas, but what I was looking for was the time for the pump to reset after each trip. I have since found out that it is 90 seconds per trip, or if it makes it all the way to lockout it would be ready to retest immediately. Thanks again.

RE: Hydraulic Reclosers timing

It has been a long time since I tested OCR's (about 20 years ago). I went back and looked it up in an old McGraw Edison book. They say it should take approximately 1 minute per operation to reset. Therefore, after one shot it should take 1 minute to reset. If you went two shots it should take 2 minutes etc. There are a couple of variables. The older the recloser, probably the more wear on the trip piston, which means the oil can "leak" around the piston for a faster reset. If the oil is cold it leaks slower and thus a longer reset. If you got to lock out the reset is fast because there is a hole that allows the oil out from under the trip piston. Hope this helps. By the way, the electronic reclosers have programmable reset times that go from 0 to 180 seconds.

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