@LionelAG posted:GRJ-
One consideration in the relay is the speed that it throws the power after the DZ-2500 throws via non-derail. If the train hits the switch with a good head of speed, the relay would cause a short because the power wasn’t thrown fast enough. A simple fix is a longer non-derail section of track into the switch than the switch alone provides. Sometimes this isn’t possible for various reasons.
Can you look into a high speed relay for this power throw? The inherent delays (high-speed non-derail followed by the command from the DZ-2500 to throw the relay) all add up.
Just a request since you’re designing a “better” solution.
I think you're looking for problems where they don't exist! Just how fast do you think the train is going to cover the few inches between the non-derailing trip and the fixed rails? Let's look at the relay specifications first.
We'll take the maximum trip or release time of 5 milliseconds. This analysis assumes the #4 Ross switches, they have the shortest distance between the non-derailing rails and the fixed rails we're switching. All the other switches have a longer distance between the two points. In order for the train to cross the three inches between the middle of the non-derailing trip rails and the start of the fixed rails we're switching power on in five milliseconds, it would have to be traveling at over 1,500 scale MPH. Even assuming it takes the relay two or three times the max amount of time to trip, we're nowhere near having a response time problem.
@romiller49 posted:So is this a double pole double throw relay?
Yes.
