{"product_id":"lixise-sx440-red-generator-avr-multi-protection-excitation-voltage-controller-manufacturer","title":"LIXiSE SX440-Red Generator AVR | Multi-protection Excitation Voltage Controller Manufacturer","description":"\u003cdiv\u003e\n\u003ch2\u003e1. Product Core Introduction\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003eSX440-Red is a half-wave phase-controlled thyristor automatic voltage regulator, matched for brushless generator excitation systems.\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\nEquipped with under-speed protection and sensing loss protection to guarantee safe and stable generator operation. Adopting full SMT surface mount technology for high integration and tiny installation size. High-performance semiconductor devices are used inside the power circuit to realize reliable auto voltage build-up relying on generator residual magnetism.\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\nSeparate terminals are designed for voltage sensing and excitation power supply. It can draw power from main stator windings directly; auxiliary winding access is optional if strong continuous short-circuit resistance is required. It connects main stator and field windings to form closed-loop voltage control, with load regulation accuracy superior to ±1%.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eCore Electrical Parameters\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003eAuto Build-up Condition: Automatically establish voltage when residual magnetism ≥4V\/25Hz, 25Hz\u003c\/li\u003e\n\u003cli\u003eInput AC Power: 190~260V, universal for 50\/60Hz generators\u003c\/li\u003e\n\u003cli\u003eExcitation DC Output: Max 90V DC (207V AC input); 4A continuous current, 6A surge current within 10 seconds\u003c\/li\u003e\n\u003cli\u003eFrequency Circuit: Built-in U\/F compensation circuit, excitation voltage drops synchronously with reduced engine speed\u003c\/li\u003e\n\u003cli\u003eVoltage Regulation Precision: Better than ±1%\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch2\u003e2. Complete Step-by-step Debugging Guide\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003e2.1 Low Frequency Under-speed Protection Setting\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003col\u003e\n\u003cli\u003eConfirm the frequency selection jumper is set to correct position.\u003c\/li\u003e\n\u003cli\u003eStart the generator and adjust rotating speed to target protection value.\u003c\/li\u003e\n\u003cli\u003eSlowly turn U\/F trimmer clockwise until the red protection LED lights up.\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\nFactory default protection threshold: 40Hz for 50Hz units, 55Hz for 60Hz units.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003e2.2 Voltage Calibration (Built-in Trimmer \u0026amp; External VR Optional)\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003eTwo adjustment modes: VOLT trimmer on AVR panel, or external VR resistor between terminal 1 and 2.\u003c\/li\u003e\n\u003cli\u003eExternal wiring rule: Install 1kΩ resistor across terminal 1 \u0026amp; 2 for external regulation; short-circuit terminal 1 \u0026amp; 2 if external VR is not needed.\u003c\/li\u003e\n\u003cli\u003eOperation steps before startup: Turn built-in VOLT trimmer fully counterclockwise, set external VR to middle position. Start genset and stabilize speed, adjust VOLT or external VR to reach rated voltage.\u003c\/li\u003e\n\u003cli\u003eStability fine-tuning: If output voltage fluctuates, rotate STAB trimmer slowly to stabilize voltage. Test X \u0026amp; XX terminal voltage with analog voltmeter; the minimal jitter point is the optimal STAB position. Too large STAB value causes voltage oscillation, too small leads to obvious voltage drop under heavy load.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003e2.3 Reactive Power DROOP Adjustment\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003eConnect CT secondary S1 \u0026amp; S2 terminals for voltage drop compensation under loaded operation. When CT secondary outputs 1A current with PF 0.8, DROOP trimmer can compensate 0~5% of rated voltage.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003e2.4 Voltage TRIM Correction\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003eConnect VAR\/PF controller signal to A1 \u0026amp; A2 terminals for remote voltage trimming. Clockwise TRIM rotation for maximum correction range, counterclockwise for minimum range.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch2\u003e3. Generator Remagnetization Operation Guide\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eScenario\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003eNew unit startup, disappeared residual magnetism, reversed X\/XX field wiring: residual voltage lower than 3.2V AC cannot trigger auto voltage build-up.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eOperation Steps\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003col\u003e\n\u003cli\u003eShut down generator and disconnect X \u0026amp; XX field wiring.\u003c\/li\u003e\n\u003cli\u003ePrepare 3~12V DC power supply. Connect DC positive pole to terminal X, connect negative pole to XX with current limiting resistor, keep power-on within 3 seconds.\u003c\/li\u003e\n\u003cli\u003eDisconnect DC power on SX440, restart generator at rated speed and test residual voltage of generator output.\u003c\/li\u003e\n\u003cli\u003eIf residual voltage exceeds 3.2V AC, stop unit and recover original SX440 wiring; repeat magnetizing operation if voltage is still insufficient.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eImportant Warning\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003eOver-magnetizing will burn AVR and generator field coils; low-voltage, low-current DC power supply is recommended.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch2\u003e4. Factory Supply Advantage\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003eLIXiSE is professional generator AVR manufacturer. SX440-Red undergoes full electrical aging test before shipment, stable global stock, support bulk wholesale, customized labeling and packaging for genset maintenance merchants and equipment manufacturers.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"LIXISE","offers":[{"title":"Default Title","offer_id":48874123985128,"sku":null,"price":25.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0791\/4265\/0088\/files\/SX440-Red-1_d8c8bbbc-c792-476d-90ae-bee5750c207d.jpg?v=1786324922","url":"https:\/\/shop.lixise.com.cn\/zh\/products\/lixise-sx440-red-generator-avr-multi-protection-excitation-voltage-controller-manufacturer","provider":"LIXISE","version":"1.0","type":"link"}