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ARAFOAL, Treadle types, Importance of HR contacts in TPWS circuit


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ARAFOAL, Treadle types, Importance of HR contacts in TPWS circuit
shekar413 Offline
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Exclamation  23-02-2018, 08:07 AM
Hi,

Could anyone explain and share documents regarding the following,

1. What is the importance of ARAFOAL and How it is applied at Level crossings?

2. What are Treadle types and Explanation about QRR and QNR relays?

3. HR front and back contacts are used in TPWS circuit for Relay operated signalling approach. What is the significance of those contacts?


Thank you,

Regards,
shekar
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ARAFOAL, Treadle types, Importance of HR contacts in TPWS circuit - by shekar413 - 23-02-2018, 08:07 AM

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