Generator and Kirk keys

[mstrlucky74]

Can anyone give some feedback regarding this generator layout. I don't think the existing genset is staying but they have feeders going from it to the black box with two dots, then from the kirk key breaker to the DP-GEN. I've never seen a scheme like this before. I confused as to what is trying to being accomplished and what's feeding what and sequences. Also the kirk key breakers implementation is confusing..:dunce::dunce::dunce::dunce:. Thanks

 

[GoldDigger]

I see what seems to be labelled as a tie switch, breaker or contactor between the two boards and it is not clear from the part of the drawing shown just where the two generators connect (if at all) lower on the page.

Are any of the loads true mandated emergency loads or just different levels of optional backup loads?
They may be trying to separate the two groups into separate transfer switches as part of the job.

 

[mstrlucky74]

I see what seems to be labelled as a tie switch, breaker or contactor between the two boards and it is not clear from the part of the drawing shown just where the two generators connect (if at all) lower on the page.

Are any of the loads true mandated emergency loads or just different levels of optional backup loads?
They may be trying to separate the two groups into separate transfer switches as part of the job.

Going to dig deeper this morning. Thanks.

 

[mstrlucky74]

Anyone know usually what type of wiring(600V-24V) the interlock(dashed line is)? Thanks

 

[ron]

Seems like a main - tie - main arrangement to support the two SWBDs shown in the event one generator is out.

 

[Bugman1400]

The dashed lines may not be mechanically/physically tied together. Often, a main-tie-main interlock consists two keys for three locks. When you remove one key from a main, it will trip its breaker. Then you can insert the key into the tie breaker and key will allow the operator to close the tie.

 

[Fnewman]

Limited information, but from the diagram it appears to be a Kirk Key interlocking system that prevents both generators from serving the total load while allowing each to serve a portion (2 keys, 3 locks). Reasons vary, but one likely reason in this case may be a lack of synchronizing equipment. In practice, a key from a generator breaker cannot be removed until that breaker is open (the KK may trip the breaker or it may be strictly mechanical). That key is the inserted at the tie breaker, allowing it to operate.

 

[mstrlucky74]

Limited information, but from the diagram it appears to be a Kirk Key interlocking system that prevents both generators from serving the total load while allowing each to serve a portion (2 keys, 3 locks). Reasons vary, but one likely reason in this case may be a lack of synchronizing equipment. In practice, a key from a generator breaker cannot be removed until that breaker is open (the KK may trip the breaker or it may be strictly mechanical). That key is the inserted at the tie breaker, allowing it to operate.

Thanks. I think that your correct. I was wondering because one em swbd feeds some ats's and the other em swbd feeds another.I've attached a larger pic of the one line. Thanks