{"product_id":"bender-iso685-d-p-690v-1000v-insulation-monitor-for-ac-dc-it-systems","title":"Bender VMD420-D-2 500V 15-460Hz Voltage Monitoring Relay for 3AC Systems","description":"\u003cdiv\u003e\u003cspan\u003eThe VMD420-D-2 is a multifunctional voltage and frequency monitoring relay from Bender, part of the LINETRAXX® series. It is designed for 3(N)AC systems to monitor undervoltage, overvoltage, underfrequency, overfrequency, phase sequence, phase failure, and asymmetry. The device uses true RMS measurement to ensure accuracy even in harmonic‑rich industrial environments.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eTechnical Specifications\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Rated system voltage (Uₙ): 3(N)AC 0…500 V\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Frequency range: 10…500 Hz\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Supply voltage (Uₛ): AC\/DC 70…300 V, 15…460 Hz\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Power consumption: ≤ 4 VA\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Alarm relays: Two independent changeover contacts, AC 250 V \/ 5 A\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Measurement accuracy (voltage): ±1.5% of full scale (50\/60 Hz)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Measurement accuracy (frequency): ±0.2% ±1 digit\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Operating temperature: –25 °C … +55 °C\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Mounting: DIN rail mounting\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Protection class: Terminals IP20, internal components IP30\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Order number: B73010006 (push‑wire terminals)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eKey Features\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· True RMS measurement – Accurate voltage monitoring even with harmonic distortion and non‑sinusoidal waveforms\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Multifunctional monitoring – Undervoltage, overvoltage, underfrequency, overfrequency, asymmetry, phase sequence, phase failure\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Two independent alarm relays – Configurable for different alarm conditions with selectable N.O.\/N.C. operation\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Adjustable time delays – Start‑up delay, response delay, and release delay to prevent nuisance tripping\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Fault memory – Selectable latching mode; alarm events are retained even after supply voltage failure\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Preset function – Automatically assigns basic parameters upon first connection, simplifying commissioning\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Password protection – Prevents unauthorised changes to safety setpoints\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· History memory – Stores the first alarm value for diagnostic purposes\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Self‑monitoring – Continuous internal self‑test ensures operational reliability\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Internal test\/reset button – Manual testing and reset without external controls\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eTypical Applications\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Machine voltage protection\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Generator protection\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Grid monitoring\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Renewable energy systems\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Distribution panels and switchgear\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· HVAC systems\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Mobile equipment and temporary power distribution units\u003c\/span\u003e\u003c\/div\u003e","brand":"Bender","offers":[{"title":"Default Title","offer_id":44141631504472,"sku":null,"price":995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/2799\/9320\/files\/VMD420-D-2.jpg?v=1779725244","url":"https:\/\/gexufein.com\/products\/bender-iso685-d-p-690v-1000v-insulation-monitor-for-ac-dc-it-systems","provider":"Gexufein Automation","version":"1.0","type":"link"}