{"product_id":"siemens-3ru1136-4bb0","title":"Siemens 3RU1136-4BB0 Thermal Overload Relay","description":"\u003cp data-path-to-node=\"1\"\u003eThe \u003cb data-path-to-node=\"1\" data-index-in-node=\"4\"\u003eSiemens 3RU1136-4BB0\u003c\/b\u003e is a legacy \u003cb data-path-to-node=\"1\" data-index-in-node=\"37\"\u003eSize S2\u003c\/b\u003e bimetallic thermal overload relay from the original Sirius series. While Siemens has transitioned to the 3RU21 \"Innovations\" line, the 3RU11 remains a staple in thousands of existing Canadian elevator controllers. It is specifically designed to plug directly into the load-side terminals of the \u003cb data-path-to-node=\"1\" data-index-in-node=\"340\"\u003e3RT103\u003c\/b\u003e series contactors.\u003c\/p\u003e\n\u003cp data-path-to-node=\"2\"\u003e\u003cb data-path-to-node=\"2\" data-index-in-node=\"0\"\u003eCore Specifications\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"3\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"3,0,0\"\u003e\u003cb data-path-to-node=\"3,0,0\" data-index-in-node=\"0\"\u003eSeries:\u003c\/b\u003e 3RU11 (Legacy Sirius)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"3,1,0\"\u003e\u003cb data-path-to-node=\"3,1,0\" data-index-in-node=\"0\"\u003eFrame Size:\u003c\/b\u003e S2 (55mm width)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"3,2,0\"\u003e\u003cb data-path-to-node=\"3,2,0\" data-index-in-node=\"0\"\u003eCurrent Setting Range:\u003c\/b\u003e \u003cb data-path-to-node=\"3,2,0\" data-index-in-node=\"23\"\u003e14.0A to 20.0A\u003c\/b\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"3,3,0\"\u003e\u003cb data-path-to-node=\"3,3,0\" data-index-in-node=\"0\"\u003eTrip Class:\u003c\/b\u003e Class 10 (Standard for elevator motor protection)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"3,4,0\"\u003e\u003cb data-path-to-node=\"3,4,0\" data-index-in-node=\"0\"\u003eIntegrated Contacts:\u003c\/b\u003e \u003cb data-path-to-node=\"3,4,0\" data-index-in-node=\"21\"\u003e1 NO + 1 NC\u003c\/b\u003e (Signal\/Logic contacts)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"3,5,0\"\u003e\u003cb data-path-to-node=\"3,5,0\" data-index-in-node=\"0\"\u003eMounting:\u003c\/b\u003e Direct mount to 3RT1 series contactors\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-path-to-node=\"4\"\u003e\n\u003ch3 data-path-to-node=\"5\"\u003e\u003cb data-path-to-node=\"5\" data-index-in-node=\"0\"\u003eIntegrated Auxiliary Contacts\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp data-path-to-node=\"6\"\u003eThe 3RU11 includes the standard dual-contact arrangement required for elevator safety and diagnostics:\u003c\/p\u003e\n\u003cul data-path-to-node=\"7\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"7,0,0\"\u003e\u003cb data-path-to-node=\"7,0,0\" data-index-in-node=\"0\"\u003e95–96 (NC - Normally Closed):\u003c\/b\u003e The \u003cb data-path-to-node=\"7,0,0\" data-index-in-node=\"34\"\u003eSafety\/Trip\u003c\/b\u003e contact. This is wired in series with the contactor coil. When a thermal trip occurs, this contact opens, immediately dropping the contactor to save the motor.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"7,1,0\"\u003e\u003cb data-path-to-node=\"7,1,0\" data-index-in-node=\"0\"\u003e97–98 (NO - Normally Open):\u003c\/b\u003e The \u003cb data-path-to-node=\"7,1,0\" data-index-in-node=\"32\"\u003eSignal\/Fault\u003c\/b\u003e contact. This closes upon a trip to trigger a fault code on the elevator controller’s diagnostic display or to illuminate a \"Motor Overload\" lamp.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-path-to-node=\"8\"\u003e\n\u003ch3 data-path-to-node=\"9\"\u003e\u003cb data-path-to-node=\"9\" data-index-in-node=\"0\"\u003eAuxiliary \u0026amp; Replacement Accessories\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp data-path-to-node=\"10\"\u003eBecause this is a legacy unit, accessories are often used to bridge the gap during repairs:\u003c\/p\u003e\n\u003cp data-path-to-node=\"11\"\u003e\u003cb data-path-to-node=\"11\" data-index-in-node=\"0\"\u003eReset \u0026amp; Control\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"12\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,0,0\"\u003e\u003cb data-path-to-node=\"12,0,0\" data-index-in-node=\"0\"\u003e3RU1900-1AB00:\u003c\/b\u003e \u003cb data-path-to-node=\"12,0,0\" data-index-in-node=\"15\"\u003eElectrical Remote Reset.\u003c\/b\u003e Allows technicians to reset the overload from a door-mounted pushbutton (standard for 120V Canadian logic).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,1,0\"\u003e\u003cb data-path-to-node=\"12,1,0\" data-index-in-node=\"0\"\u003e3RU1900-1A \/ 1B:\u003c\/b\u003e \u003cb data-path-to-node=\"12,1,0\" data-index-in-node=\"17\"\u003eMechanical Remote Reset.\u003c\/b\u003e A flexible cable for manual resetting from outside the high-voltage cabinet.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"13\"\u003e\u003cb data-path-to-node=\"13\" data-index-in-node=\"0\"\u003eMounting \u0026amp; Protection\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"14\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"14,0,0\"\u003e\u003cb data-path-to-node=\"14,0,0\" data-index-in-node=\"0\"\u003e3RU1936-3AA01:\u003c\/b\u003e \u003cb data-path-to-node=\"14,0,0\" data-index-in-node=\"15\"\u003eIndividual Mount Bracket.\u003c\/b\u003e Required for mounting the relay on a DIN rail independently of the contactor.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"14,1,0\"\u003e\u003cb data-path-to-node=\"14,1,0\" data-index-in-node=\"0\"\u003e3RT1936-4EA2:\u003c\/b\u003e \u003cb data-path-to-node=\"14,1,0\" data-index-in-node=\"14\"\u003eTerminal Covers.\u003c\/b\u003e Ensures finger-safe protection for the large box terminals.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-path-to-node=\"15\"\u003e\n\u003ch3 data-path-to-node=\"16\"\u003e\u003cb data-path-to-node=\"16\" data-index-in-node=\"0\"\u003eField Maintenance \u0026amp; Canadian Code Notes\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul data-path-to-node=\"17\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"17,0,0\"\u003e\u003cb data-path-to-node=\"17,0,0\" data-index-in-node=\"0\"\u003eModern Replacement:\u003c\/b\u003e The direct functional and dimensional successor is the \u003cb data-path-to-node=\"17,0,0\" data-index-in-node=\"75\"\u003e3RU2136-4BB0\u003c\/b\u003e. If you are replacing a failed 3RU11, the 3RU21 is fully compatible with your existing 3RT1 contactor.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"17,1,0\"\u003e\u003cb data-path-to-node=\"17,1,0\" data-index-in-node=\"0\"\u003eDial Setting:\u003c\/b\u003e Per Canadian electrical safety codes, the dial must be set to the \u003cb data-path-to-node=\"17,1,0\" data-index-in-node=\"80\"\u003eMotor Nameplate FLA\u003c\/b\u003e. Do not adjust this higher to \"solve\" a tripping issue; if the motor is drawing over 20A, there is likely a mechanical drag in the pump or hoist machine.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"17,2,0\"\u003e\u003cb data-path-to-node=\"17,2,0\" data-index-in-node=\"0\"\u003eThe \"Blue Slide\" Test:\u003c\/b\u003e During routine maintenance or annual inspections, manually actuate the blue \u003cb data-path-to-node=\"17,2,0\" data-index-in-node=\"99\"\u003e\"Test\"\u003c\/b\u003e slide. You must verify that the car is unable to move while the 95–96 contact is open.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"17,3,0\"\u003e\u003cb data-path-to-node=\"17,3,0\" data-index-in-node=\"0\"\u003eTerminal Integrity:\u003c\/b\u003e In older S2 controllers, thermal cycling over many years can loosen the box terminals. Ensure they are torqued to \u003cb data-path-to-node=\"17,3,0\" data-index-in-node=\"134\"\u003e3.0–4.5 Nm\u003c\/b\u003e. Heat from a loose connection can bleed into the bimetallic strips, causing \"nuisance trips\" even if the motor current is normal.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"17,4,0\"\u003e\u003cb data-path-to-node=\"17,4,0\" data-index-in-node=\"0\"\u003eAging Bimetals:\u003c\/b\u003e If the unit is more than 15–20 years old, the internal bimetallic strips can lose their calibration. If you suspect inconsistent tripping, it is often more cost-effective to replace the relay with the modern 3RU21 version.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"R.A.M. Parts","offers":[{"title":"Default Title","offer_id":48128883753112,"sku":null,"price":0.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0741\/4369\/5000\/files\/rn-image_picker_lib_temp_7e2258d4-ed56-4e19-a75b-0eb1ac809f31.jpg?v=1771366013","url":"https:\/\/parts4rem.ca\/products\/siemens-3ru1136-4bb0","provider":"Parts4REM","version":"1.0","type":"link"}