Knox Xentra VFD 5.5K-22K Heavy-Duty Water Pump Inverter AC Drive

Product Overview

The Knox Xentra VFD 5.5K–22K series variable frequency drive is built for demanding medium-to-large agricultural deep tube wells, industrial booster pumping stations, and commercial water treatment facilities. High-capacity pumps (7.5 HP to 30 HP) subject electrical distribution boards to severe current inrush during startup and generate violent hydraulic water hammer waves when stopping abruptly. The Xentra 5.5K–22K series solves both issues by providing smooth closed-loop and sensorless vector speed modulation directly from three-phase 380V to 480V industrial supplies. Engineered for heavy daily duty cycles in severe operational conditions, this drive integrates both Open-Loop Vector Control (SVC) and Closed-Loop Vector Control (FVC), yielding 180% torque at 0Hz and speed control accuracy within ±0.02%. Its wide voltage tolerance (380V -15% to 480V +10%), factory conformal PCB coating, integrated dynamic braking unit, and standard detachable parameter-copy keypad make it an exceptionally durable and serviceable solution for commercial plant engineers and irrigation contractors. ## Key Engineering Advantages: - Dual Vector Control with 180% Torque at 0Hz: Supports Closed-Loop Vector Control (FVC) alongside Sensorless Vector Control (SVC), delivering 180% starting torque at 0Hz and an adjustable speed ratio of 1:1000 for effortless deep-well head buildup. - Detachable Keypad with Parameter Copy Function: Features an included detachable front keypad that stores and clones parameter profiles, allowing technicians to program multiple pump control panels in seconds without manual entry. - Extreme Overload Resilience (220% for 1 Second): Heavy-duty IGBT output stage withstands 150% rated current for 60 seconds and up to 220% for 1 second, powering through sudden gravel stalls or temporary pipe blockages without tripping. - Coated Harsh-Environment Electronics: High-grade conformal coating on all internal circuit boards resists high ambient humidity (<90% RH), conductive dust, and airborne moisture common in Bangladeshi pump houses. ## Compatibility & Application: Specifically designed for 5.5 kW (7.5 HP) up to 22 kW (30 HP) heavy-duty three-phase AC induction motors and permanent magnet synchronous motors. Operates on 3-phase 380V–480V AC (50/60 Hz) grids, captive diesel generators, and large three-phase solar pump systems powering agricultural irrigation schemes, municipal water works, cooling towers, and industrial boiler feed pumps. ## Package Contents: - 1 x Knox Xentra VFD 5.5K–22K Heavy-Duty Water Pump Inverter Unit - 1 x Detachable LED Control Keypad with Parameter Copying Capability - 1 x Keypad Extension Connection Cable - 1 x Engineering Programming Manual & Terminal Wiring Guide - 1 x Heavy-Duty Wall / Cabinet Mounting Kit Designed specifically for demanding rural and semi-urban operating environments, the Xentra drive provides sensor-less vector control (SVC) and V/F regulation with an output frequency range of 0.1Hz to 500Hz. It maintains 150% rated torque down to 0.5Hz, preventing pump stall during deep well draw-down or varying pipe head levels. The unit protects pump motors against voltage sags, supply phase loss, and sudden power failure through controlled kinetic deceleration. ## Key Engineering Advantages: - 150% Starting Torque at 0.5Hz: Delivers high initial mechanical breakaway torque via sensor-less vector control (SVC) and auto torque boost (up to 30%), preventing impeller lockup in sand-bearing or high-head submersible pumps. - Controlled Deceleration During Power Cut: Senses sudden electrical supply dropouts and decelerates the motor down a controlled ramp rather than cutting power instantly, preventing destructive water hammer and reverse pipe pressure shock. - Conformal-Coated Circuit Boards: Factory-coated PCB assemblies protect internal gate drives, microcontrollers, and switching components against tropical humidity (>90% RH), dust ingress, and corrosive agricultural airborne compounds. - Built-in Dynamic Braking Unit & Modbus: Integrates an onboard braking chopper for fast stops without external braking modules, paired with native RS-485 Modbus RTU for automated PLC/SCADA water system integration. ## Compatibility & Application: Pairs with 0.75 kW (1 HP) to 3.7 kW (5 HP) three-phase asynchronous induction motors used in agricultural borehole pumps, surface centrifugal pumps, domestic booster pumps, and industrial cooling circulating pumps. Compatible with 1-phase 220V–240V AC inputs (converting to 3-phase output) or direct 3-phase 380V–440V AC utility grids and diesel generators. ## Package Contents: - 1 x Knox Xentra VFD 0.75K–3.7K Water Pump Inverter Unit - 1 x Integrated Front Keypad with Speed Potentiometer - 1 x User & Engineering Parameter Manual - 1 x Mounting Hardware & Terminal Screws Kit

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