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Along with the currents readings, can you show us the phase angles of said currents?

There are times when you have to re-use your old laptop with Windows98 installed and a DB9 connector.

Field testing of some Eaton closed transition ATS's gave paralleling delays in 80-90 msec time window. An alarm is set at 100 msec that stops the process, if need be.

You would have to disconnect all 3 coils at neutral ends. At this power, these should be welded.

You could add a piece of bus bar with the required holes for the CT and for the lugs.

A_B_C_A_B_C_N_N _C_A_B_C_A_B_N_N A_B_C_N That looks good? Found that too... http://www.advcablebus.com/downloads/advancedcablebuscatalog.pdf

DSP MKII is a ground fault relay. It comes with a grounding resistor. It's the vintage model of the I-gard. If you have feeder modules, it will tell you which phase is grounded and on which feeder. It leaves you live with one occurring ground fault (Alarm). If you get a second ground fault on a...

67 V where? Power supply? Check fuses.

This SDP module should be installed right into the switchgear. 8 feet distance is too large and protection is lost. Our manufacturer states a max cable length of 14 in! And we use 30 A breakers. Not much current flows into this, only high voltage transient surges.

Fault current will use all provided ground paths to return to its source, the A Trafo, assuming it's secondary is wye and the neutral is grounded.

Flat short time delay on the tie, while I2t delays on both mains (LV LSIG Breakers). May be a 90% pick up on the tie's long delay, if coordination is that critical. Lastly, consider removing the instantaneous element on both mains while using it on the tie. That's it, almost full coordination...

More over, the manual I have suggest the use of a Bell alarm contact. Then use a lamp or another mean to indicate automatic trip operation.

Google Megger DET2/3 or DET2/3, you should have good info there.

Yeah, choosing a limiter fuse to protect your xfo's primary may give you bigger fuse than expected, if you go higher than 12 x.

A breaker is a breaker. Eaton, Schneider, ABB and Siemens all do breakers. Other suppliers?

Spring-loaded mechanisms have usually load breaking capabilities. Pringle and Bolt-Switch are 2 examples.

Ok, it's pretty easy to open the breaker with a remote electrical switch, then remove voltage with the pole switch and then un-rack the breaker. All this without much AF hazard. The pole-switch is outside and if something happens, the blast will propagate in all directions, meaning it's going to...

What's upstream of that breaker? A switch , a transformer? It should be easy to use the existant open/close electrical wiring and switch and move them away near the access door. Your breaker is electrically operated already? Best is to rack-in, rack-out on a de-energized bus, where an upstream...

An high impedance GF protection would help too. As a large number of 3phase faults begin with a ground fault.

Open air cap bank is a bird's favorite place to nest and then die... and burn your fuses. I would go metal enclosed 100 %.