Measuring Monitoring Relay ( HT MMR ), Voltage phase control 3AC, 1000 V, aux. Voltage 110 V AC/ DC conf. to RDSO Spec no. RDSO/ PE/ SPEC/ AC/ 0184- 2015 ( Rev. 1 ) Suitable for switch board cabinet of LHB type EOG Coaches. [ Warranty Period: 30 Months after the date of delivery ]