{"product_id":"voltage-monitor-three-phase-rt-818-380vac-8pin-html","title":"RT-818 Three-Phase Voltage Monitor 380VAC – 18% Drop Limit, Phase Sequence \u0026 8-Pin Base","description":"\u003cp\u003eThe RT-818 monitors three-phase symmetrical supply voltage for drop and phase sequence faults. The permissible voltage variation limit is internally preset at -18% for asymmetric drop and -12% for symmetrical drop. It operates independently of the neutral conductor, making it suitable for symmetrical load circuits. The unit connects via an 8-pin lamp base and is compatible with 380VAC ±10% at 50\/60 Hz.\u003c\/p\u003e\u003cp\u003eOutput is via an 8A SDTP relay with SPDT AC1 10A\/250VAC contacts. Indicator lamps show supply voltage presence and out-of-limits or reverse phase-sequence conditions. Fall time and reset time are both preset at under 0.5 seconds, with a release delay of 40ms.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eThree-phase voltage monitoring — supervises drop and phase-sequence faults\u003c\/li\u003e\n\u003cli\u003eNeutral-independent operation — works on symmetrical load circuits without neutral\u003c\/li\u003e\n\u003cli\u003e18% voltage drop limit — internally preset, no external calibration required\u003c\/li\u003e\n\u003cli\u003ePhase failure (Pf) and phase sequence (Ps) monitoring functions\u003c\/li\u003e\n\u003cli\u003e8-pin lamp-base connection — plug-in installation into a standard relay socket\u003c\/li\u003e\n\u003cli\u003eSupply voltage and fault indicator lamps\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eProduct Benefits\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003ePreset limits mean the unit is operational immediately after installation\u003c\/li\u003e\n\u003cli\u003eFall time under 0.5 seconds and release delay of 40ms give fast fault response\u003c\/li\u003e\n\u003cli\u003eSPDT 10A\/250VAC output contacts connect directly to contactors and motor starters\u003c\/li\u003e\n\u003cli\u003eIP20 enclosure suits standard industrial panel mounting\u003c\/li\u003e\n\u003cli\u003eSymmetrical-drop threshold at 12% catches gradual voltage degradation before equipment damage\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e RT-818\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Supply:\u003c\/strong\u003e 380VAC ±10%, 50\/60Hz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePermissible Voltage Variation:\u003c\/strong\u003e -18%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSymmetrical Drop Threshold:\u003c\/strong\u003e -12%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Relay:\u003c\/strong\u003e 8A SDTP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Contacts:\u003c\/strong\u003e SPDT AC1 10A\/250VAC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFall Time:\u003c\/strong\u003e \u0026lt;0.5 sec (preset)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReset Time:\u003c\/strong\u003e \u0026lt;0.5 sec (preset)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelease Delay:\u003c\/strong\u003e 40ms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection Type:\u003c\/strong\u003e 8-pin lamp base\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDegree of Protection:\u003c\/strong\u003e IP20\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage Type:\u003c\/strong\u003e AC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunctions:\u003c\/strong\u003e Phase Failure (Pf), Phase Sequence (Ps)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eWhy You'll Love It\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e8-pin plug-in base allows fast replacement without rewiring the panel\u003c\/li\u003e\n\u003cli\u003eVisual indicators give at-a-glance status without opening the panel door\u003c\/li\u003e\n\u003cli\u003eNeutral-independent design simplifies installation in delta and symmetrical circuits\u003c\/li\u003e\n\u003cli\u003ePackage includes 1× Voltage Monitor Three-Phase RT-818 380VAC 8-Pin\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Other","offers":[{"title":"Default Title","offer_id":56578619507070,"sku":"525132","price":32.15,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/2250\/3550\/files\/15675124351358.webp?v=1779635169","url":"https:\/\/lynk.gr\/en\/products\/voltage-monitor-three-phase-rt-818-380vac-8pin-html","provider":"Lynk.gr","version":"1.0","type":"link"}