{"product_id":"siemens-current-transformer-50-5a-1-2va","title":"Siemens Current transformer, 50\/5A, 1.2VA","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe Siemens 4NC5112-2CB21 is a window-type current transformer (CT) from the SENTRON\/4NC series, used to measure or monitor current in low-voltage (up to 0.72 kV) power circuits. It converts a primary current (e.g. 50 A) to a standardized secondary current (5 A), enabling measurement devices, meters or protection relays to safely monitor currents. The transformer is designed for compact mounting and is suitable for integration into switchboards or distribution panels where current measurement or metering is required.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWindow-type current transformer (SENTRON 4NC series)\u003c\/li\u003e\n\u003cli\u003ePrimary rated current: 50 A\u003c\/li\u003e\n\u003cli\u003eSecondary rated current: 5 A — standard output for metering \/ protection devices\u003c\/li\u003e\n\u003cli\u003eRated burden (secondary): 1.2 VA — suitable for standard current measurement loads\u003c\/li\u003e\n\u003cli\u003eAccuracy class: Class 1.0 — adequate precision for metering and monitoring applications\u003c\/li\u003e\n\u003cli\u003eScrew-terminal connection for secondary output — simple, stable wiring\u003c\/li\u003e\n\u003cli\u003eSuitable for insertion of single conductor or busbar up to 20 mm width through the window opening\u003c\/li\u003e\n\u003cli\u003eCompact mechanical design — facilitates retrofit or panel-mount integration\u003c\/li\u003e\n\u003cli\u003eIP20 protection rating — intended for use inside enclosed switchgear or control cabinets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eArticle Number:\u003c\/strong\u003e 4NC5112-2CB21\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Window-type current transformer (CT)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Current Rating (In):\u003c\/strong\u003e 50 A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecondary Current Rating (Is):\u003c\/strong\u003e 5 A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Secondary Burden:\u003c\/strong\u003e 1.2 VA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccuracy Class:\u003c\/strong\u003e 1.0\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Insulation Voltage:\u003c\/strong\u003e up to 0.72 kV (suitable for low-voltage networks)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWindow Opening (for conductor \/ busbar):\u003c\/strong\u003e Accepts bar\/conductor up to 20 mm width, ~19 mm opening diameter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecondary Connection:\u003c\/strong\u003e Screw-terminal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection Rating (Housing):\u003c\/strong\u003e IP20\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesign Type:\u003c\/strong\u003e Bushing\/window-type (not split-core) — requires disconnection before installation on live conductor\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eCompliance \u0026amp; Standards\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePart of Siemens 4NC SENTRON series — designed for low-voltage current measurement applications\u003c\/li\u003e\n\u003cli\u003eAccuracy and burden ratings compliant with standard CT performance requirements for metering and protection\u003c\/li\u003e\n\u003cli\u003eIntended for use in enclosed switchgear or control cabinets (IP20 protection) to ensure user safety\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eApplications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe 4NC5112-2CB21 CT is ideal for current measurement, energy monitoring, metering, protective relay feeding, or any application requiring a standardized 5 A secondary current derived from a higher primary current (50 A). It can be used in switchboards, distribution panels, control cabinets, energy metering installations, or automation systems — particularly where retrofitting or compact installation of a measurable CT is needed.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":40775036960832,"sku":"4NC5112-2CB21","price":1233.33,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0556\/3662\/3424\/files\/4NC5112-2CB21.jpg?v=1764922637","url":"https:\/\/industrial.rubicon.tech\/products\/siemens-current-transformer-50-5a-1-2va","provider":"Rubicon Group Industrial Technology Shop","version":"1.0","type":"link"}