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High Durability Electronic Component MMLG01R1AB9002D

Alstom Areva MMLG01R1AB9002D single-circuit electromechanical undervoltage monitoring relay from MMLG01 series, designed for continuous busbar voltage supervision in medium voltage switchgear, railway traction substations, generator control cabinets and industrial power distribution systems.

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Technical Specifications Basic Identification Brand: Alstom / Areva T&D Full Model Code: MMLG01R1AB9002D Series: MMLG01 Single-Function Voltage Relay Core Function: Undervoltage (UV) Protection & Monitoring Rated Input Voltage: 110 VAC, 50 Hz Cabinet Size: Standard Size 2 flush-mount enclosure Application: MV substation busbar supervision, railway traction power supply, generator excitation panel, transformer auxiliary control circuit Electrical Operating Parameters Nominal Monitoring Voltage (Vn): 110 VAC, 50 Hz Undervoltage Pickup Adjustment Range: 70% ~ 95% × Vn Adjustable Time Delay Range: 0.1 s ~ 10 s definite time delay Reset Voltage Threshold: ≥ 102% of nominal voltage Continuous Long-Term Withstand Voltage: 80% ~ 115% Vn Coil Apparent Power Consumption: ≤ 7 VA at rated 110 VAC Operating Response: Definite time delayed tripping, no instantaneous action Contact Configuration & Load Ratings Contact Arrangement: 2 sets change-over contacts (2CO / 2NO + 2NC) Continuous Thermal Current per contact: 5 A AC Breaking Capacity (AC-15, 250 VAC): Max 1250 VA inductive load DC Breaking Capacity (DC-13, L/R=0.04s, 110 VDC): Max 330 W trip coil load Momentary Make & Carry Capacity (0.2s pulse): 30 A peak short-time current