{"product_id":"abb-ref-543-feeder-terminal-protection-relay","title":"ABB REF 543 | Feeder Terminal Protection Relay","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ABB\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eREF 543\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis an integrated feeder protection, control, and measurement terminal designed for medium-voltage networks and complex switchgear configurations including single, double, and duplex busbar setups. It features built-in PLC programmable logic functions, allowing substation automation sequences to be executed directly within the unit. \u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e: ABB\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eModel Series\u003c\/strong\u003e:\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eREF 543\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eApplication Framework\u003c\/strong\u003e: Feeder terminal protection, control, and monitoring\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eNetwork Earthing Types\u003c\/strong\u003e: Isolated neutral, resonant-earthed, and partially earthed networks\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eAsset Protection Capabilities\u003c\/strong\u003e: Medium-sized three-phase asynchronous motors and shunt capacitor banks\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eAutomation Capacity\u003c\/strong\u003e: Integrated multi-tasking internal PLC logic blocks\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eNative Protocols\u003c\/strong\u003e: SPA bus, LON bus, IEC 60870-5-103, DNP 3.0, and Modbus\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eAdapter Options\u003c\/strong\u003e: Supports IEC 61850 via SPA-ZC 400 and Profibus DPV1 via SPA-ZC 302\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHardware Input Channels\u003c\/strong\u003e: 25 binary inputs for field status tracking\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHardware Output Channels\u003c\/strong\u003e: 18 output relays for breaker tripping and alarms\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSensing Configurations\u003c\/strong\u003e: Traditional instrument transformers, current sensors, or voltage dividers\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eFault Diagnostics\u003c\/strong\u003e: Integrated hardware short-circuit fault locator algorithm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eIndustrial Application Scenarios\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eImplementation across medium-voltage utility distribution substations to provide unified protection, line control, and metering within single or double busbar topologies.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eProtection and automatic sequence management for industrial shunt capacitor banks deployed in large manufacturing facilities for reactive power compensation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLocalized control and thermal monitoring of heavy three-phase asynchronous motors in process industries to protect against rotor stalling, unbalance, and overloading.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":45025547157619,"sku":"REF 543","price":233.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/4348\/2227\/files\/screenshot_2026-05-22_11-39-03_9d89ef1f-58d0-4467-a41b-e98db2ffa201.png?v=1779421214","url":"https:\/\/www.dcssupplier.com\/products\/abb-ref-543-feeder-terminal-protection-relay","provider":"DcsSupplier Limited","version":"1.0","type":"link"}