{"product_id":"abb-ar-644b590a28-substation-auxiliary-relay","title":"ABB AR 644B590A28 Substation Auxiliary Relay","description":"\u003cdiv\u003e\u003cp\u003eABB AR 644B590A28 Substation Auxiliary Relay is a compact AR‑series device designed for auxiliary signaling and control tasks within substation automation. It serves as a configurable interface point inside ABB switchgear and control panels, enabling alarm outputs, interlock logic, and signaling between protection relays and field devices as part of ABB’s broader substation solutions. As an AR auxiliary relay, it is integrated into ABB protection and control architectures and commonly used with ABB panel and relay configurations to extend signaling and control capabilities without redesigning main protection circuits. For exact electrical ratings, contact ABB or consult the official AR-series catalog to confirm coil voltage, contact arrangement, and current\/capacity specifications, as these are defined by the specific order and application. The part number 644B590A28 identifies a dedicated ABB substation auxiliary relay variant intended for use within ABB’s modular protection and control ecosystem, supporting streamlined installation and compatibility with ABB’s Relion protection family and related automation components. Whether upgrading legacy panels or assembling new substation control schemes, this AR relay delivers a standardized, ABB‑designed component that helps coordinate auxiliary signaling and interlock functions across substation equipment. \u003c\/p\u003e\u003c\/div\u003e","brand":"ABB","offers":[{"title":"New","offer_id":51656848474414,"sku":null,"price":580.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0818\/1038\/files\/Ebay_website_image_1baf86db-9b9a-4ba1-8a8e-104e64f3576b.jpg?v=1769463757","url":"https:\/\/plgautomation.com\/products\/abb-ar-644b590a28-substation-auxiliary-relay","provider":"PLG Automation ","version":"1.0","type":"link"}