PSX-AC - Intelligent Circuit Breaker for AC 2 and 3 Rail
DCC Specialties applies the PSX solid state layout circuit breaker
technology for AC 3 rail operators.
List: from $54.95 (see the list of dealers)
The proven solid state technology and experience that led to the development
of the DCC Specialties PSX layout power district circuit breakers has been
applied for AC 3 rail operations. DCC Specialties offers the
PSX-AC 2 and 3 rail intelligent circuit breakers.
According to the designer Larry Maier, "the stakes are much higer with AC as operating currents can approach 20
Amps. That's enough energy to easily destroy your loco or its electronics
under certain circumstances. The trick is to permit the high currents but
have precise regulation that knows a destructive short from a current spike. The PSX-AC's exclusive patented microprocessor controller does the job."
There are other mechanical, non electronic circuit breakers available but
they can not intelligently differentiate between a short and spike or reset
automatically. The PSX-AC has automatic or manual reset feature in addition
to 4 trip current settings.
PSX-1AC: One Output
- All Solid State Operation
Fast solid state design with reliable quiet
action. No clicks or sparks.
- Adaptive Load Reset
Electronically determines if the overload is a real
short or due to excess load in sound units or lighted passenger cars.
- Block Detection
Either a photo cell or current can be used to detect a
train in a block. The photocell can turn off the block.
- Over Voltage Protection
If there is an over voltage on the track caused by
an AC System failure or other power inputs the PSX will shut down and protect
- Range of Current Trip Setting
The currents can be adjusted over a range of
4.8 to 17.8 amps. Values can be set using jumpers.
- Very Low Voltage Drop
Breaker On resistance is less than 0.060 ohms, so
the PSX has a low voltage drop even at high currents. Much better than
detectors that use a diode voltage drop.
- Manual or Automatic Reset
Automatic reset of the breaker after 2 seconds. A
switch can be used for a manual reset.
- Outputs for LED Indicators
LEDs can be added to monitor the input/output
power and the status.
- Output for Audio Alert
An audible sounder can be added to the card to alert
if there is a short.
- No Power Supply Needed
Board size: is 4.75 by 2.25 inches
- Flash Programmable
Micro Processor can accept updated software if needed.
Note: The PSX-1AC operates by opening one side of the two inputs leads when
an overload is sensed. The PSX-1AC opens the path from J1-4 to J2-2 when the
breaker senses an overload. Additional power to the PSX-2AC, 3AC, & 4AC is
connected by daisy chaining from J1, 1 and 2 to the next PSX J1, 3 and 4.