Technical Specifications Basic Identification Brand: Alstom / Areva T&D (GE Grid legacy) Full Model Code: MVAJ051RA0800B Series: MVAJ Midos Auxiliary Tripping Relay Case Size: Size 2 standard cabinet enclosure Core Function: High-speed tripping, fault latching, multi-channel auxiliary signal conversion Coil Rated Voltage: DC 110V Application: MV switchgear bay control, railway traction substation, generator protection panel, transformer trip interlock circuit Coil Electrical Parameters Rated Control Supply Voltage: 110 VDC Operating Voltage Tolerance: 77 ~ 137.5 VDC Coil Power Consumption: ≤10 W at rated voltage Pull-in Voltage: ≤70% Un; Drop-out Voltage: ≥10% Un Operating Response Time: Ultra-fast trip action ≤10 ms Continuous withstand voltage: 125 VDC long-term safe operation Contact Configuration & Load Ratings Contact Arrangement: 5 change-over (CO) multi-contact sets (5NO + 5NC) Continuous thermal carrying current per contact: 5 A AC Breaking Capacity (AC-15, 250 VAC): Max 1250 VA (5A inductive load) DC Breaking Capacity (DC-13, L/R=0.04s, 110 VDC): Max 330 W, 3A inductive trip coil load Momentary make/carry capacity (0.2s short pulse): 30 A peak Contact Material: Silver alloy anti-welding contact tips Mechanical Service Life: ≥10,000,000 cycles (unloaded) Electrical Service Life: ≥100,000 cycles under full rated breaking load Indication & Reset Features Latched mechanical trip flag: Visual red fault indicator, remains locked after trip until manual reset Front panel built-in manual reset push button for fault flag clearing Lockable transparent polycarbonate dustproof front cover, prevents accidental internal contact adjustment Rear screw-clamp terminal block for coil power, trip circuit and signal wiring Mechanical & Installation Mounting Type: Standard flush panel mounting (Size 2 unified cabinet cutout dimension) Overall External Dimensions: H 180 mm × W 144 mm × D 212 mm Net Unit Weight: ~1.6 kg Enclosure: Sealed industrial polycarbonate housing, dust & moisture resistant Environmental & Compliance Standards Operating Ambient Temperature: -20 ℃ ~ +70 ℃ Storage & Transport Temperature: -40 ℃ ~ +85 ℃ Relative Humidity: 5% ~ 95% non-condensing Vibration & Shock Resistance: IEC 60255-21-1 substation anti-vibration test standard EMC Immunity Standard: IEC 61000-6-2 industrial electromagnetic compatibility Compliance Norm: IEC 60255 Measuring relays and protection equipment Certifications: CE marked, RoHS & REACH hazardous substance compliant