{"product_id":"gic-md21df-voltage-monitoring-relay-sm-175-208-480-vac-3-phase-5amps","title":"GIC MD21DF Voltage Monitoring Relay SM 175 208-480 VAC 3 Phase 5Amps","description":"\u003ch3\u003e\u003cstrong\u003eGIC MD21DF Voltage Monitoring Relay\u003c\/strong\u003e\u003c\/h3\u003e\nThe \u003cstrong\u003eGIC MD21DF\u003c\/strong\u003e is a compact and reliable \u003cstrong\u003evoltage monitoring relay\u003c\/strong\u003e designed to protect electrical systems from voltage fluctuations and phase failures. It supports 3-phase voltage input and offers fault detection like over-voltage, under-voltage, phase loss, and phase sequence errors. It is widely used in control panels and industrial equipment for \u003cstrong\u003epower safety and system stability\u003c\/strong\u003e.\n\u003ch3\u003e\u003cstrong\u003eMD21DF – Technical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eSupply Voltage (±6%)\u003c\/strong\u003e: 208 - 480 VAC (3 Phase 3 Wire)\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eSupply Variation\u003c\/strong\u003e: -12% to +10% (of rated supply)\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eFrequency\u003c\/strong\u003e: 50\/60 Hz\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003ePower Consumption (Max.)\u003c\/strong\u003e: 3.5 VA\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eSettable Nominal Voltage\u003c\/strong\u003e: 208 - 220 - 380 - 400 - 415 - 440 - 480 VAC\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003ePhase Loss\u003c\/strong\u003e: Yes\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003ePhase Sequence\u003c\/strong\u003e: Yes\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eTrip Levels\u003c\/strong\u003e:\n\u003cul\u003e\n \t\u003cli\u003e\n\u003cstrong\u003ePhase Asymmetry\u003c\/strong\u003e: N\/A\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eUnder Voltage\u003c\/strong\u003e: -20% to -20% (of rated supply)\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eOver Voltage\u003c\/strong\u003e: +2% to +20% (of rated supply)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eTime Delay\u003c\/strong\u003e:\n\u003cul\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eOn Delay\u003c\/strong\u003e: 5 s\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eTrip Time (OFF Delay)\u003c\/strong\u003e: 0.5 to 15 s (Selectable)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eRelay Output\u003c\/strong\u003e: 1 C\/O\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eContact Rating\u003c\/strong\u003e: 5A @ 250 VAC \/ 30 VDC (Resistive)\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eElectrical Life\u003c\/strong\u003e: 1×10⁵\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eMechanical Life\u003c\/strong\u003e: 3×10⁶\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eUtilization Category\u003c\/strong\u003e:\n\u003cul\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eAC - 15\u003c\/strong\u003e: Rated Voltage (Ue): 120\/240 V, Rated Current (Ie): 3.0\/1.5 A\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eDC - 13\u003c\/strong\u003e: Rated Voltage (Ue): 24\/125\/250 V, Rated Current (Ie): 0.20\/0.22\/0.1 A\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eLED Indication\u003c\/strong\u003e:\n\u003cul\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eHealthy\u003c\/strong\u003e: Red LED: Supply Healthy → Continuous ON, Phase Reverse → Flashing\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eUV\u003c\/strong\u003e: Red LED: Under Voltage → Continuous ON\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eOV\u003c\/strong\u003e: Red LED: Over Voltage → Continuous ON\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eAsymmetry\u003c\/strong\u003e: Red LED: Asymmetry → Continuous ON\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eAll LEDs\u003c\/strong\u003e: Phase Fail or Higher Cut OFF (\u0026gt;560 VAC) or lower cut off (\u0026lt;175 VAC). Blinking → Pot changed during running conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e: -15°C to +60°C\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eStorage Temperature\u003c\/strong\u003e: -20°C to +80°C\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eHumidity (Non-Condensing)\u003c\/strong\u003e: 95% (Rh)\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eEnclosure\u003c\/strong\u003e: Flame Retardant UL 94-V0\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eDimension (W x H x D) in mm\u003c\/strong\u003e: 18 x 59 x 90\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eWeight (unpacked) Approx.\u003c\/strong\u003e: 70 g\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eMounting\u003c\/strong\u003e: Base \/ DIN rail\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eDegree of Protection\u003c\/strong\u003e: IP 20 for Terminal, IP 30 for Enclosure\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n \t\u003cli\u003eReal-time monitoring of voltage and phase conditions\u003c\/li\u003e\n \t\u003cli\u003eDetects phase loss and incorrect sequence\u003c\/li\u003e\n \t\u003cli\u003eAdjustable over and under-voltage thresholds\u003c\/li\u003e\n \t\u003cli\u003eUser-settable trip delay timing\u003c\/li\u003e\n \t\u003cli\u003eCompact DIN rail mounting\u003c\/li\u003e\n \t\u003cli\u003eLED indication for quick fault identification\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eBenefits of Voltage Monitoring Relay\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n \t\u003cli\u003ePrevents costly electrical damage from voltage faults\u003c\/li\u003e\n \t\u003cli\u003eEnhances equipment lifespan and safety\u003c\/li\u003e\n \t\u003cli\u003eEasy to install and configure\u003c\/li\u003e\n \t\u003cli\u003eSaves time in diagnostics with LED fault display\u003c\/li\u003e\n \t\u003cli\u003eSupports continuous and reliable operations in harsh environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eApplications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n \t\u003cli\u003eIndustrial control panels\u003c\/li\u003e\n \t\u003cli\u003eGenerators and backup systems\u003c\/li\u003e\n \t\u003cli\u003ePump and motor control systems\u003c\/li\u003e\n \t\u003cli\u003eCommercial building power distribution\u003c\/li\u003e\n \t\u003cli\u003eHVAC and refrigeration equipment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eHow to Use\u003c\/strong\u003e\u003c\/h3\u003e\nTo use the \u003cstrong\u003eGIC MD21DF\u003c\/strong\u003e, mount it on a DIN rail in your electrical panel. Connect the 3-phase supply to its terminals. Set the desired voltage thresholds and trip delay using the onboard dials. Once powered, the relay continuously checks the voltage levels and phase sequence. If the supply goes beyond set limits or a phase error occurs, the relay switches its output to prevent damage to the connected system. LED indicators help identify the exact issue quickly.\n\u003ch3\u003e\u003cstrong\u003eWhy You Should Buy\u003c\/strong\u003e\u003c\/h3\u003e\nThe \u003cstrong\u003eGIC MD21DF voltage monitoring relay\u003c\/strong\u003e is a smart choice for protecting any 3-phase electrical system. It offers \u003cstrong\u003eeasy setup, quick fault detection\u003c\/strong\u003e, and is made by a trusted Indian manufacturer. Ideal for both small control panels and large industrial systems, it ensures reliable protection from electrical issues.\n\u003ch4\u003e\u003cstrong\u003eWhere and Who Uses It\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eWhere:\u003c\/strong\u003e Control cabinets, industrial equipment, commercial power panels\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eWho:\u003c\/strong\u003e Panel builders, electrical contractors, OEMs, maintenance teams, factory engineers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eAbout the Manufacturer\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cstrong\u003eGIC India\u003c\/strong\u003e is a leading Indian brand in industrial automation and electrical control products. Known for innovation and quality, GIC manufactures timers, relays, counters, and monitoring devices that meet global standards. Their solutions are widely used in industrial, commercial, and infrastructure applications across India and abroad.","brand":"Voltage Monitoring Series","offers":[{"title":"Default Title","offer_id":43327744606297,"sku":"ECDUVR0001","price":0.0,"currency_code":"INR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0727\/5659\/2729\/files\/Untitled-design-71.png?v=1779108953","url":"https:\/\/econtroldevices.com\/products\/gic-md21df-voltage-monitoring-relay-sm-175-208-480-vac-3-phase-5amps","provider":"Econtroldevices","version":"1.0","type":"link"}