Load break switches
Load break switches
(OP)
How many times can switches like these break full load current, or at least interrupt normal feeder current (200amps)?
http://www.sandc.com/en/products--services/product...
I can't find any duty cycle listed. Asking around I am getting answers from never, to parallel loop splitting only, to as needed without any concern.
http://www.sandc.com/en/products--services/product...
I can't find any duty cycle listed. Asking around I am getting answers from never, to parallel loop splitting only, to as needed without any concern.






RE: Load break switches
1. Call the manufacturer of the specific make and model you propose using, with your duty cycle and limits (voltage, current, number of cycles, length of time between cycles).
2. Call two other makes of similar switches, ask the same question. Get the answer in writing, not by voice mail or telephone.
RE: Load break switches
So it is better to get detailed info from mfg.
As per this specific brand is concerned, I think it can close for 42kAp = 2 operations, 21kAp = 10 operations.
Thanks,
Vijay
RE: Load break switches
Thanks,
Vijay
RE: Load break switches
Here is an interesting powerpoint on the matter, but sadly the manufactures are not listed in the final test results, however the results pretty much sum up what many in the field have discovered.
https://www.neetrac.gatech.edu/publications/OHLB_I...
RE: Load break switches
RE: Load break switches
According to the descriptive bulletin for the Omni-Rupter, the expected life is ~500 full load operations,~2000 mechanical operations.
RE: Load break switches
http://www.sandc.com/globalassets/sac-electric/doc...
Sounds like full load current should be avoided unless an emergency? I have a feeling its 3-5 operations for 900amps at 25kv.