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8 Cards in this Set
- Front
- Back
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if you loose switch indication in a relay interlocking and get it right back what would happen to the signal?
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you would loose common from the switch indications so he would have to re display the signal
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If you loose switch indication in a mechanical interlocking and get it right back what would happen signal?
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you would get your signal right back
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FE and FW
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Drops directional s and used in speed control circuit
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you pull up and gates are down
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put orders on crossing
check how far you can see in either direction |
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if one gate up and one gate down what do you look for
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anything holding the gates down
if your XR is down it is an activation failure IF XR is up go to gate check MCR if MCR is UP check motor up contact check motor brushes check gold nut |
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if both gates are down what do you check
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approaches and island circuits
check voltage comming in and out on line circuits |
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what is an activation failure
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more than 50% of lights not working
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what kind of circuit is found on a soft island
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epic II
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