Technical Specifications Basic Identification Brand: Alstom / Areva T&D (GE Vernova legacy) Full Model Code: VAGM22AF71C Series: VAGM22 Voltage Monitoring Relay Protection Function: Instantaneous Overvoltage (O/V) Rated Nominal Voltage (Vn): 110 VAC Rated Frequency: 50 Hz Enclosure Form: 1D V 10T standard cabinet case Drawing Reference: Wiring Diagram MADZ602.15-2, Outline MFJ012, Nameplate RZF9134-602 Application: MV substation busbar protection, traction power supply overvoltage lockout, generator auxiliary circuit, transformer control cabinet Electrical Operating Parameters Rated Monitoring Voltage: 110 VAC, 50Hz Overvoltage Pickup Adjustment Range: 110% ~ 140% × Vn (121V ~ 154V AC) Operation Characteristic: Instantaneous trip, no intentional time delay, response time ＜20ms Reset Voltage Threshold: ≤102% of nominal voltage Continuous Allowable Operating Voltage: 80% ~ 115% Vn Coil Power Burden: ≤8 VA at rated 110VAC External VT Requirement: Not required, direct voltage connection Contact Configuration & Load Ratings Contact Arrangement: 1 NO + 2 NC changeover contacts (S/R standard type) Continuous Thermal Current per contact: 5 A AC Breaking Capacity (AC-15): Max 1250 VA, 250 VAC, 5A resistive & inductive loads DC Breaking Capacity (DC-13, L/R=0.04s): Max 330 W, 110 VDC, 3A inductive trip circuit Momentary Make & Carry Capacity (0.2s): 30 A peak current Contact Material: Silver alloy anti-welding contacts Mechanical Service Life: ≥10,000,000 cycles (unloaded) Electrical Service Life: ≥100,000 cycles under full rated breaking load Indication & Calibration Features Latched mechanical trip flag: Visual fault indicator, manual reset pushbutton Rotatable adjustment dial for continuous overvoltage threshold setting Lockable transparent polycarbonate front cover to avoid unauthorized parameter modification Rear screw-clamp terminal block for voltage input and trip/alarm wiring Mechanical & Installation Mounting Type: Flush panel mounting (standard substation cabinet cutout) Overall Outer Dimension: H 182 mm × W 146 mm × D 215 mm Net Weight: ~4.35 kg Enclosure: Dustproof sealed industrial polycarbonate housing Environmental & Compliance Standards Operating Ambient Temperature: -20 ℃ ~ +70 ℃ Storage & Transport Temperature: -40 ℃ ~ +85 ℃ Relative Humidity: 5% ~ 95% non-condensing Vibration & Shock Test: IEC 60255-21-1 substation anti-vibration standard EMC Immunity: IEC 61000-6-2 industrial electromagnetic compatibility Compliance Standard: IEC 60255-3 Measuring relays and protection equipment