51N and SKM
51N and SKM
(OP)
OK, am I missing something here? How do you put a 51N relay into SKM? Do you add a seperate relay? When I try to add a function to the 50/51 relays I cant get the right taps for the 51N.
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
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RE: 51N and SKM
RE: 51N and SKM
RE: 51N and SKM
Other software, like ETAP, will allow you to enter a multifunction relay with all of its functions and levels, connected to multiple CTs (and PTs). You can then assign whatever CT to each function, by designating a CT as residually connected.
RE: 51N and SKM
RE: 51N and SKM
David, I tried that and am still having the same problems you mentioned. I think an email to SKM is in order.
RE: 51N and SKM
Same for a ground fault function in a trip unit, its entered as a separate device.
RE: 51N and SKM
RE: 51N and SKM
RE: 51N and SKM
ETAP allows all functions of a relay (50/51, 50/51N, 50/51G, 51V, 67, Neg. Sequence, etc.), with multiple levels (some relays have four 50/51, two 50/51N, etc.), with one or more CT or PT inputs, and one or more trip outputs, all in one relay, just like it is in real life. It provides automatic phase and GF graphs for each circuit, with the proper curves in each, all of which are selectable anyway.
This sure makes the one-line look better than SKM or others, and it makes the input, manipulation of settings, and output setting sheets much easier also.
Another example is that I could never understand why some software requires you to pick the phase and GF trip functions separately for a LV C/B! If a LV C/B has a GE MicroVersaTrip trip unit, for instance, what are the chances of it having a GF function that's not a MicroVersaTrip? ETAP has one place to put in all the setting info, just like the real C/B.
That sounds more logical to me.
RE: 51N and SKM
I would agree with you too. Are ETAP and SKM comparable costwise?
RE: 51N and SKM
RE: 51N and SKM