4. Wiring diagram Relay Protection Relay NJB1-S wiring diagram A1 15 (+) (~) (-) (~) 16 18 A2 5. Overall and mounting dimensions (mm) 22.5max NJB1S 102max NJB1-S Time Delay Relay 1. General NJB1-S Series Monitoring Protection Relay is applicable for controlling circuit @ A.C. 50Hz/ 60Hz, up to 380V rated supply voltage and up to D.C.24V supply voltage as monitoring protection element to make or break circuit according to preset value. NJBI-S time-delay relay is used in controlling circu.