Time current curves
Time current curves
(OP)
What time current curves are most appropriate for protecting overhead MV lines? Typical load profile, 15% commercial, 85% residential.
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
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RE: Time current curves
The load mix really doesn't play much of a role when it comes to fault protection, other than cold load pickup issues.
RE: Time current curves
Do you go for normal, long time or short time curves in addition to the inverse?
RE: Time current curves
In today's environment customers will complain about any reclosing operations.
RE: Time current curves
Most of the reclosers are using a cooper form 6 controller which has I guess you could say a different standard of time-current classification then ANSI or IEC published covers, at least it seems that way. Curves are classified by number, although some of them are near identical ANSI curves, others appear to be modified versions of them for different protection schemes.
This will give an idea:
https://www.eiseverywhere.com/file_uploads/d64d532...
RE: Time current curves
Without detailed knowledge of the system, we can't really provide much in the way of specifics, just general considerations.
RE: Time current curves
RE: Time current curves
RE: Time current curves