At My Wits End With SKM in Terms of Getting TCC's

Out of my area but have some suggestions that may or may not help.."One way is to enter all of the generator data into the fields on captor. (X"d x'd, time constant..etc) this requires a fairly detailed cutsheet. I believe it allows default values for a given size.

The other way is to create a custom device in the ptw library. You enter the points from your decrement data and reference this device as your generator. It will plot your decrement exactly as it would a fuse or breaker curve. There are standard decrement curves that you may copy and edit."

The problem to me is shifting the curves. They should have tabs that say-how many generators, what size each, and when you model TCC's compensate for the generators selected on line, e.g., double, triple, etc. LTPU, LTD, STPU, STD.

Maybe the SKM developers could write you an add-on?

That's just NBG.

That was the last answer I received from them but I don't know how to do it! And what effect would that have on my c/b curves? For talking purposes suppose I have two 100 kw, 480 v gens., one 200 hp motor and I size breakers accordingly. When I plot the curves they will show the motor trip ahead of the superimposed generator c/b curves. Then I have a lot of explaining to do! Therefore, it seems to me, the TCC's as basically useless in showing results?

How many projects have you done on the SKM program? What is the time factor here?

I've done many but all but one non-parallel operation. Once I had two gens. in which I was able to find an identical c/b frame size and doubled it. Worked out good.

Time frame is not an issue yet as I've only tendered a bid. I just don't want to get caught with my pants down as I would think that SKM has been asked this question many times. I know one of my colleagues as them and they responded to him that the program was smarter than that! Right?

Hey look, thank you for your help as I really appreciate it. I normally don't open mouth and insert foot but I guess I over estimated their program. I've been using it for years.

Here's what I did, called up a curve of the mfgr and went into the edit command; changed the damned settings maintaining the same x/r ratio's, etc. Changing the decrement curves means changing the kw which is somewhat of a help but not with the breaker settings. Exporting it in dxf into autocad. Trying to shift the curves but what a pain ita! (acronymn)

My new job as a not SKM employee!

Many thoughts.

If you mean abdominal surgery I'd rather not at this time!

Jraubsr,

To understand PWSlack's comment you may wish to view http://cr4.globalspec.com/thread/2446 "CRIMINAL" and http://cr4.globalspec.com/thread/58701 "acronymectomy". Basically, a lot of us reading the threads might actually understand bits and pieces of topics outside of our field if acronyms were removed (acronymectomy) and replaced by full words (at least the first time they are used).

Bruce

Thanks for the input con acronyms but I was just joking with him as I didn't understand.

(No more than I can understand SKM not solving this problem but they are trying) I was under the impression that you couldn't give them a problem they couldn't solve as they wrote the program!