{"product_id":"woodward-seg-mrn321dm-multifunctional-relay","title":"Woodward SEG MRN321DM Multifunctional Relay","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eDescription:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eThe Woodward SEG MRN321DM is a multifunctional relay for mains monitoring, designed for grid decoupling and network protection applications in industrial and utility power systems. Manufactured by Woodward SEG GmbH \u0026amp; Co. KG in Germany, the MRN321DM delivers comprehensive protection functions including over\/under voltage, over\/under frequency, rate of change of frequency (ROCOF), and vector shift monitoring — making it a critical component in distributed generation and grid interconnection systems. Industrial procurement teams and EPC contractors in the USA rely on this relay for substation automation and renewable energy integration projects. This unit is available through WeSellStocks.co as surplus wholesale stock, offering verified industrial buyers and MRO teams worldwide access to genuine Woodward SEG protective relay equipment. UAE-based distributors and system integrators actively source the MRN321DM for medium voltage switchgear and protection panel applications. Supplied with the original Woodward High Tech Line User Manuals CD and extraction accessories. Technical datasheet and full configuration details available upon request.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eTechnical Specifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e Woodward SEG (Woodward SEG GmbH \u0026amp; Co. KG, Germany)\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Multifunctional Relay for Mains Monitoring \/ Grid Decoupling Relay\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e MRN321DM\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eFA. No.:\u003c\/strong\u003e 15593977\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eIndustry Category:\u003c\/strong\u003e Power Protection \u0026amp; Control \/ Electrical Protection Relays \/ Energy \u0026amp; Utilities\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eNominal Voltage (Un):\u003c\/strong\u003e 100V AC\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eNominal Frequency (Fn):\u003c\/strong\u003e 50\/60 Hz\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eAuxiliary Supply Voltage (Uv):\u003c\/strong\u003e Wide range 16–360V DC \/ 16–270V AC\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eSoftware Version (Gv):\u003c\/strong\u003e G120\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eVoltage Rating:\u003c\/strong\u003e 100V AC (nominal measurement voltage)\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eCurrent Rating:\u003c\/strong\u003e Available upon request\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003ePower Rating:\u003c\/strong\u003e Available upon request\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eInput Voltage:\u003c\/strong\u003e 100V AC (measurement); Aux supply 16–360V DC \/ 16–270V AC\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eOutput Voltage:\u003c\/strong\u003e Available upon request\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eMounting Type:\u003c\/strong\u003e Flush panel mounting (draw-out cassette type, 19\" rack compatible)\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eStandards \/ Compliance:\u003c\/strong\u003e CE marked; G120 firmware; electr. checked (as per label)\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eCondition:\u003c\/strong\u003e Exchange Unit (Woodward SEG certified surplus \/ withdrawable electronic module)\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eIncluded Accessories:\u003c\/strong\u003e Woodward High Tech Line User Manuals CD; 2x extraction \/ pull handles (flex cable type with gold-tone locking clip)\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eOther Confirmed Specs:\u003c\/strong\u003e 4-relay output configuration (Relay 1–4), Serial Interface port, External Reset input, External Blocking input (per wiring diagram MRN3-1\/2); KESCO-branded front panel assembly visible (OEM\/regional variant); Blue LED indicator array for U\u0026lt;\u0026lt;, U\u0026lt;, U\u0026gt;, U\u0026gt;\u0026gt;, f\u0026lt;, f\u0026gt;, f\u0026lt;\u0026lt;, f\u0026gt;\u0026gt;, ΔΘ, ΔΦ monitoring; TRIP and ENTER controls with SELECT\/RESET pushbutton\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eApplication:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eThe MRN321DM is deployed in medium and low voltage power distribution panels, distributed generation (DG) interconnection systems, and grid protection schemes where mains decoupling is required per utility grid codes. It is commonly installed in solar, wind, and cogeneration plants for islanding detection and automatic disconnection from the public grid. The relay is compatible with standard protection panel architectures and communicates via a serial interface for SCADA integration. Procurement engineers, substation contractors, and panel builders sourcing replacement or surplus Woodward SEG protection relays will find this unit available for immediate supply through WeSellStocks.co.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eThe Woodward SEG MRN321DM remains one of the most actively sourced multifunctional mains monitoring relays across utility, industrial, and renewable energy projects in North America, the Middle East, and global EPC supply chains. WeSellStocks.co stocks genuine surplus Woodward SEG protective relays available for wholesale purchase, with shipping to the USA, UAE, and international destinations. Buyers seeking MRN321DM distributor pricing, verified stock availability, or bulk procurement of Woodward SEG relay equipment are encouraged to contact WeSellStocks.co directly for a commercial quotation.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eMetafields:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003ebrand:\u003c\/strong\u003e Woodward SEG\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003epart_number:\u003c\/strong\u003e MRN321DM\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003efa_number:\u003c\/strong\u003e 15593977\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eproduct_type:\u003c\/strong\u003e Multifunctional Relay for Mains Monitoring \/ Grid Decoupling Relay\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eindustry_category:\u003c\/strong\u003e Power Protection \u0026amp; Control \/ Electrical Protection Relays \/ Energy \u0026amp; Utilities\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003evoltage_rating:\u003c\/strong\u003e 100V AC (nominal); Aux 16–360V DC \/ 16–270V AC\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003ecurrent_rating:\u003c\/strong\u003e Available upon request\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003epower_rating:\u003c\/strong\u003e Available upon request\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003einput_voltage:\u003c\/strong\u003e 100V AC measurement; 16–360V DC \/ 16–270V AC auxiliary supply\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eoutput_voltage:\u003c\/strong\u003e Available upon request\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003emounting_type:\u003c\/strong\u003e Flush panel \/ draw-out cassette mount\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003estandards:\u003c\/strong\u003e CE; G120 firmware; electr. checked\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003econdition:\u003c\/strong\u003e Exchange Unit (Surplus \/ Withdrawable Module)\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003estock_quantity_available:\u003c\/strong\u003e Contact for availability\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003etarget_markets:\u003c\/strong\u003e USA | UAE | Worldwide\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eglobal_shipping:\u003c\/strong\u003e Yes\u003c\/p\u003e\n\u003ch5 class=\"font-claude-response-body break-words whitespace-normal\"\u003econdition: Open box\u003c\/h5\u003e","brand":"We Sell Stocks","offers":[{"title":"Default Title","offer_id":59475740819742,"sku":"cabin: BC14- Henaz","price":949.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0807\/7230\/1086\/files\/17_716752d0-4639-4c5c-a6e4-ee9a5b6f72b2.png?v=1781702004","url":"https:\/\/wesellstocks.co\/products\/woodward-seg-mrn321dm-multifunctional-relay","provider":"We Sell Stocks","version":"1.0","type":"link"}