My layout is powered by a NCE Power Pro 5 amp command station with another 5 amp booster. These each feed 1/2 of a bus made of 12 gauge THNN wire from a central location. I've run a number (6) PSX-AR to manage auto-reversing and provide some short protection beyond what's onboard the command station and booster with few issues for the last decade.
After adding on the Cascade Extension in a separate room, the additional opportunity for trains to find trouble and the isolation of operators when over there led me to start thinking of some independent power management.
Being on a budget, I picked up a NCE EB1 circuit breaker and ran wire back to the other room where the boosters are. I connected it to the one half of the bus that is devoted to DCC power now. The two boosters are grounded to each other.
The line to the new EB1 takes off where the first drop from the bus also connects to a PSX-AR. This point is less than 3' by wire from the boosters. It's all 16 gauge. It's is about 20 feet over to the room where the Cascade Extension runs. I initially placed the EB1 over there so it's LED could be checked by operators there.
I expected the EB1 to shut down the Cascade Extension in the event of a short, leaving the other circuits on that booster free to operate. Instead, the booster shuts down and blinks its insolence at me.
After doing some initial review, I found I should revise the trip current, so both the old PSX-AR and the EB1 are at 3.81 amps.
Still the insolent LED blinks on the booster when I do the quarter test.
I've confirmed there are no sneak paths to the Cascade Extension by disconnecting the known feed through the EB1 and getting nothing still powered.
I would guess that the EB1 should operate much like a switch. Everything past the point on it where it connects to the grid would be off, but I would think that the grid itself should be unaffected -- that's the point of having it protect parts of the system, right?
Is my EB1 bad or what?
Do I need to delve more into the various other settings that can be done via jumpers and configuring the access points?
Could there be a wiring issue that laid fallow until the EB1 was connected (seems unlikely).?
Wire for the supply to the EB1 too long/too thin?
Could the EB1 and the PSX not play well together and be interferring with each other?