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Project 0720, Basic Crossing Lamp Setup
Gathering Materials-
First off was to get all the relays needed which was:
1-GRS Type K Interlocking Relay
1-GRS Type W AC Relay
1-GRS Type K D.C. Flasher
1-GRS Type K Neutral Relay
After getting the relays I contacted the Yahoo group who gave me a copy of a old GRS document that showed a basic way to wire it. I installed the relays to the plywood wall in my room and then used jumpers to test the operation.
Plan-
The idea was to get to sets of lamps flashing and also have a bell in the circuit.
Operation-
I have this set where 110Vac is comming into a transformer and the Type W Ac relay. The transformer puts out 10Vac that goes to a GRS rectifier that powers the relays, from the rectifier it also connects to the batteries to charge them. The Type W relay is a 110Vac relay used to send 10Vac to the lamps when there is Main power, the idea is that when the 110Vac (Main Power) dies the relay also dies transferring the battery power to the bulbs. That is commonly called a "Power Transfer Relay (PO)." The Type K Interlocking relay consists of 2 sets of coils that when both are powered they keep the contacts open, when one set of coils dies it closes the contacts. When the contacts close they start the flasher, neutral, and thermal relays. The neutral relay controls the lamps to make sure that a lamp does not stay on all the time. The flasher controls the lamps and flashes about 45flashes a min. NOW the thermal relay I added to the plan for the bell, I wanted the bell to sound 5 seconds after the lamps started. This is how I have my crossing protection system setup.
Final-
This is how I will keep the system till I get a GRS Crossing cabinet, just have to go get it!
The view before the bell was added and the batteries connected
Close up of the Type W Relay, I have it bypasses till I got the batteries connected they are now connected and the jumpers have been removed
Close view of the interlocking relay, notice the 2 switches to the right of the relay. They are to simulate when a train is on the track, left switch is if the train is on the left side of the street and the right switch is if the train is on the right side of the street. They are closed at all times till the train cuts on the track and shorts out the rails.