Introduction
For Railway signaling circuit, a wide range of Q series relays are used for many signaling operation such Route Relay interlocking, automatic signaling systems, point operation, track circuiting etc.
Relay plays a vital role in railway signaling and hence requires RDSO approval for each type of relays being us in the system. JMV offers a wide range of application specific and special purpose Q series relays as per the relevant Railway standards.
JMV also offers Silver Impregnated Graphite Contacts which is a key component of Q series Metal to Carbon Contact Relays. Silver impregnated Graphite Contacts combine the best properties of high conducting silver refractory for graphite material base contacts being widely used in Railway signaling relays.
Technical Parameter
| Type | Description | Voltage | Contact |
|---|---|---|---|
| QN1 | Non ACI, DC Neutral Line Relay | 24 V DC | 8F-8B / 12F-4B |
| QNA1 | ACI, DC Neutral Line Relay | 24 V DC | 8F-8B / 12F-4B |
| QT2 | Non ACI,9Ω DC Neutral Track Relay | 1.4 V DC | 2F-2B |
| QTA2 | ACI,9Ω DC Neutral Track Relay | 1.4 V DC | 2F-1B |
| QBA1 | ACI, DC Biased Line Relay | 24 V DC | 8F-8B |
| QSPA1 | ACI, Slow to Pick up, DC Neutral Line Relay | 24 V DC | 8F-4B |
| QN1K | Non ACI, 1000Ω, DC Neutral Line Relay | 24 V DC | 6F-6B / 4F-4B |
| QNA1K | ACI, 1000Ω, DC Neutral Line Relay | 24 V DC | 6F-6B / 4F-4B |
| QBCA1 | ACI, DC Biased DC Contactor Relay | 24 V DC | 2HF-4B |
| QS3 | Non ACI, 1000Ω, DC Neutral Line Relay | 12 V DC | 4F-4B |
| QNN1 | Non ACI, Twin DC Neutral Line Relay | 24 V DC | LH 6F-2B / RH 6F-2B |
| QNNA1 | ACI, Twin DC Neutral Line Relay | 24 V DC | LH 6F-2B / RH 6F-2B |
| QL1 | DC Megnetically latched Neutral Line Relay | 24 V DC | 11F-4B |
| QBAT | DC Biased Track Relay | 2 V DC | 2F-2B |
| QECX-61 | AC Lamp Proving Relays | 110 V DC | 4F-4B |
Applications
Track Circuit Control: Railway signaling relays oversee track circuits, detecting trains and activating signals to prevent collisions.
Signal Interlocking: Railway signaling relays in signal interlocking systems prevent conflicting routes, ensuring only safe ones are permitted.
Point Machine Control: Railway signaling relays control point machines to ensure safe alignment of tracks for train movement.
Level Crossing Control: Signaling relays control barriers, lights, and audible warnings at railway level crossings to alert road users of approaching trains and prevent accidents.
Train Detection and Axle Counting: Signaling relays are essential in systems detecting trains and counting axles, crucial for monitoring train movement and maintaining safe spacing.
Automatic Train Protection Systems: Railway signaling relays are crucial components of automatic train protection systems, enforcing speed limits and preventing accidents by automatically applying brakes when necessary.
Train Order Systems: Railway signaling relays facilitate the transmission and reception of train orders in manual train order systems, ensuring safe and efficient coordination of train traffic between stations.
Emergency Stop Systems: Signaling relays are essential components of emergency stop systems, halting trains during emergencies or signaling faults by triggering emergency brakes for a safe stop.
Remote Monitoring and Control: Railway signaling relays are now integrated into centralized systems, enabling remote monitoring and control of signaling infrastructure across the railway network.