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Reply to "Post war ZW transformer circuit breaker pops after 5 - 10 minutes of running 3 trains simultaneously; what's up?"

Drummer3 posted:

For now, I temporarily added an external 10 amp breaker, manual reset.  I first tried a 15 amp, but it did not trip fast enough when doing 'shorting' tests.  In fact, smoke came from the where the roller rides against the coil before the 15 amp breaker tripped. So for me, the 10 amp was the ticket.   Now, I need to find a 10 amp automatic reset breaker to put into the case permanently.

 Also, I connected TVS's on the A and D posts, but they kept tripping the breaker as soon as I cracked the throttle.   So, not sure if I have the right TVS.  Specs are below.   Any ideas?

 

 

 

 

I use 32 volt bi-directional TVS units from www.mouserelectronics.com  Not sure if you have correct rating TVS units or not. Also using 7 amp breakers on each output(A, B, C, & D) from my ZW. 

FYI: the internal circuit breaker on the post war ZW is rated at 15 amps and is on the common side.

Lee Fritz

OGR Publishing, Inc., 1310 Eastside Centre Ct, Suite 6, Mountain Home, AR 72653
800-980-OGRR (6477)
www.ogaugerr.com

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