Relays widely used in railway signal technology, called signal relays (in signal systems, simply referred to as relays), are important components in railway signals. It plays an important role both as a core component of a relay signal system and as an interface component of an electronic or computerized signal system. The reliability of the action of the relay directly affects the reliability and safety of the signal system.
The signal relay has the advantages of fast action, stable operation, long service life and small volume. Widely used in power protection, automation, motion, remote control, measurement and communication devices.