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User Manual | Manualzz MK1000A Combined Overcurrent & Earth-Fault Relay User's Guide 2. Light indication The indicators display the status of the system as Model NX1000A-240A(6) : 198 ~ 265 V AC. Model NX1000A-240AD(6) : 85 ~ 265 V AC. 110 V DC ~ 340 V DC Combined Overcurrent & Earth Fault Relay. NX 1000A. NX1000A Combined Overcurrent. & Earth-Fault Relay User's Guide. NX 1000A. NX 1000A. 2.Light Indicators. Indicator. FUNCTION. Mikro® reserves the right to make changes without further notice NX1000A-240AD For 50Hz system, auxiliary voltage 85 ~ 265 V AC or 110~340 V DC.NX1000A · Microprocessor based numerical relay · Current measurement based on fundamental frequency · Three-phase, low-set overcurrent · Three-phase, high-set All current measurements and current settings are based on 5A current transformer (CT). MK1000A Combined Overcurrent. & Earth-Fault Relay User's Guide. A BRIEF