Setting of 49/50 & 50/51 relays
Setting of 49/50 & 50/51 relays
(OP)
I niticed on IEEE buff book-P298 that overload relays- 49/50 should be set at 100% cable capacity and induction relays should be set at125% cable capacity. Is this the common practice here in North America?






RE: Setting of 49/50 & 50/51 relays
Mike
RE: Setting of 49/50 & 50/51 relays
RE: Setting of 49/50 & 50/51 relays
Mike
RE: Setting of 49/50 & 50/51 relays
RE: Setting of 49/50 & 50/51 relays
If you can't get that assistance at work, perhaps an applicaiton engineer from one of the relay manufacturers can provide some assistance. The manufacturer's application engineer might also be able to suggest classes or seminars that help you out. One to consider, (full disclosure, I do have a vested interest here) is the Basler Relay Application School held each June; 5 1/2 days of relaying from soup to nuts. More information on that can be found at www.basler.com. I know that at least one of the relay manufacturers you reference also has classes that might be useful, check their websites.
RE: Setting of 49/50 & 50/51 relays
Clearly the objective is to adequately protect the asset, be that a cable, transformer or switchgear.