The TY156/GRP08 is a Twin 4F 3B Neutral Line Relay for general railway trackside signalling applications where special characteristics such as AC immunity, slow release etc. are not required. Double windings allow use in railway signalling circuits where operation from either of two separate supplies is required. Twin relays consist of two relays which in effect are electrically and mechanically independent, housed in a single enclosure to the dimensions of a single relay to BR930.
