{"product_id":"st420b1-1-microprocessor-line-protection-relay","title":"ST420B1-1 Microprocessor Line Protection Relay | Feeder Circuit Protection","description":"\u003ch2\u003eST420B1-1 Microprocessor Line Protection Relay\u003c\/h2\u003e\u003cp\u003eThe ST420B1-1 series is a microprocessor-based line protection device with integrated protection body and display module. Designed for feeder circuits with rated frequency 50\/60Hz and rated voltage below 1kV.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eIntegrated protection body with built-in display module\u003c\/li\u003e\n\u003cli\u003eSuitable for feeder circuits rated 50\/60Hz, below 1kV\u003c\/li\u003e\n\u003cli\u003eIncludes dedicated current transformer (CT)\u003c\/li\u003e\n\u003cli\u003eIncludes zero-sequence current transformer for ground fault detection\u003c\/li\u003e\n\u003cli\u003eCompact, reliable microprocessor-based design\u003c\/li\u003e\n\u003cli\u003eOEM\/ODM available — Suzhou manufacturer\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplications\u003c\/h3\u003e\u003cp\u003eIdeal for low voltage switchgear panels, power distribution boards, and industrial feeder circuit protection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest a quote or technical datasheet — contact Wanlong Electric today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Wan Long Electric Group Co., Ltd.","offers":[{"title":"Default Title","offer_id":43907631054914,"sku":null,"price":1400.0,"currency_code":"CNY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0688\/1221\/0242\/files\/ST420B1-3.jpg?v=1782958070","url":"https:\/\/wanlongelectric.com\/products\/st420b1-1-microprocessor-line-protection-relay","provider":"Wan Long Electric Group Co., Ltd.","version":"1.0","type":"link"}