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EB1 Circuit Breaker Version 1.1 Setup Notes

NCE part number for the EB1 is 5240225.
EB1v1_1.jpg
Important notes about setting up the EB1 version 1.1:
1. Ignore the "123"  label on the switch block. Please use the ABC on the printed circuit board for setting the EB1 to the correct current rating for your layout.
2. Do not assume the EB1 is 100% correctly set out of the package for your particular situation. In the picture above the EB1 is set for 1.5 amps with all three switches AWAY from the ABC.
3. If you need the absolute maximum capacity from your Power Cab at all times you can use the 2.2 amp setting with the caveat that your layout is properly wired with a 12ga. or 14ga. bus wire. The use of terminal strips is recommended to accommodate transitioning from longer distance heavy gauge wires to shorter distance smaller wires gauge to make proper board connections.   http://wiringfordcc.com/
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All NCE systems and boosters have built in over current sensing for basic self-protection that will continuously / automatically try to reset every half second (500ms) until the unit is damaged. They do not have manual breakers that will trip or fuses that will blow. The default trip rating of an EB1 circuit breaker is 16ms. That is roughly 30 times faster than the standard booster overload trip time!

The reason you would add protection of some sort is that you don’t want the entire railroad to shut down if you have a short. You break it up into smaller pieces. All of our systems will only try to protect themselves and not your locos. Use the EB1 to divide up your layout and protect your trains! Think of this like the breaker panel in your house.

You can have a short circuit in a decoder but there is no guarantee it will trip a DCC circuit breaker or shutdown a booster.  Myth:  DCC circuit breakers protect decoders.  Fact:  DCC circuit breaker protect boosters.
 
The goal of the DCC circuit breaker is to protect THE BOOSTER by isolating the short locally within the breakers power district so the booster can remain powering the OTHER power districts to keep the other parts of the layout running.
 
For the DCC circuit breaker to act, a short circuit has to meet specific criteria.
 a) The short circuit current must be above the trip point of the DCC circuit breaker.
b) The short circuit current must last for a period of time.

You MUST use some form of Protection!

You can have a short circuit in a decoder but there is no guarantee it will trip a DCC circuit breaker or shutdown a booster.  Myth:  DCC circuit breakers protect decoders. Fact:  DCC circuit breaker protect boosters. The goal of the DCC circuit break is to protect THE BOOSTER by isolating the short locally within the breakers power district so the booster can remain powering the OTHER power districts to keep the other parts of the layout running. For the DCC circuit breaker to act, a short circuit has to meet specific criteria. a) The short circuit current must be above the trip point of the DCC circuit breaker. b) The short circuit current must last for a period of time. There is nothing in the design of a given decoder that is designed to comply with these requirements when they fail. FYI: The LED is essentially a “status” light.  LED on means the breaker is NOT tripped. LED off means it is tripped and waiting for manual reset. LED blinking means it is tripped and automatically trying to reset. All NCE systems have basic built in over current sensing (500 milliseconds) for basic self-protection that will continuously try to reset every two seconds until destroyed if left uncorrected. They do not have a breaker that will trip or fuses that will blow. The EB1v1.1 Circuit breaker provides automatic or manual short circuit protection (16 milliseconds or longer) for one power district. Can be used with most DCC systems. Threshold, Duration, type of reset can all be configured. Features of the EB1v1.1:  Provides short circuit protection for one power district. Trip current adjustable for 1.5 to 8 Amps.  Easy hookup using screw terminals, no solderingStatus indication LED. Additional output for remote LED. Optional manual reset. Adjustable short circuit response time. Adjustable power-up response time to accommodate sound decoder equipped locomotives. 

Use a REAL surge protector not a power strip for the AC wall power connecting your DCC systems power supply.

http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=NET The

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