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    25 hp (18.5 kW) VFD, 3 Phase 240V, 420V, 480V

    $992.18
    Favorable price 25 hp (18.5 kW) VFD, three phase 240V, 420V, 480V variable frequency drive, IP20, RS485 enabled, brand new direct sale by Chinese manufacturer with wholesale price.
    SKU: GK3000-4T0185G
    Free shipping
    Delivery date: 6-12 days

    25 hp (18.5 kW) high performance variable frequency drive, three phase 240V, 420V, 480V for selection, IP20 enclosure.

    Specification:

    Basics Model GK3000-4T0185G
    Capacity 25 hp (18.5 kW)
    Shipping weight 18 kg
    Dimension 423*258*230 mm
    I/O Feature Rated current 39 A
    Input voltage 3 phase 240V /420V /480V AC ±15% (Optional)
    Input frequency 50Hz/ 60Hz
    Output voltage 3 phase AC 0~input voltage
    Output frequency 0.00~400.00Hz
    Over load capacity 150% of rated current for 1 minute, 180% of rated current for 3 seconds
    Control Feature Control mode V/F control;
    Sensorless vector control;
    Communication RS485
    Speed regulation 1:100
    Start torque 150% of rating torque at 1 Hz
    Speed control accuracy ≤±0.5% of rating synchronous speed
    Frequency precision Digital setting: max frequency x± 0.01%;
    Analog setting: max frequency x± 0.2%
    Frequency resolution Analog setting: 0.1% of max frequency;
    Digital setting: 0.01Hz
    Torque boost Automatic torque boost, manual torque boost 0.1%~30.0%
    Interior PID controller Be convenient to make closed-loop system
    Automatic energy save running Optimize V/F curve automatically based on the load to realize power save running
    Automatic voltage regulation (AVR) Can keep constant output voltage when power source voltage varies.
    Automatic current limiting Limit running current automatically to avoid frequent over-current which will cause trip
    Environment Enclosure rating IP 20
    Temperature –10℃~ +40℃; VFD will be derated if ambient temperature exceed 40℃; each rise 1℃, the derate will be 5%
    Humidity 5%-95%, without condensation
    Altitude ≤1000m; VFD will be derated if above 1000m
    Impingement and oscillation Normal running:<5.9m/s2 (0.6g); Transportation:<15m/s2 (1.5g)
    Store environment –20℃~ +60℃; no dust, no corrosive gas, no direct sunlight

    Tips: Variable frequency drive undervoltage
    The undervoltage is a problem that we often encounter in using VFD. It is mainly because of the main circuit voltage is too low (220V series below 200V, 380V series below 400V). The main reason: One circuit of rectifier bridge damage or one circuit of SCR does not work correctly, all these can lead to undervoltage. Moreover, the main circuit contactor damage resulting DC bus has voltage loss in the charge resistance may lead to undervoltage. And the voltage detection circuit failure may also cause undervoltage problem.
    For example, a 25hp VFD displays "Uu" after power on. Check the rectifier bridge charge resistance and find no problem, but haven't heard a sound of the contact action after power on. Because this VFD charging circuit doesn't use SCR but depend on the contactor attracting to complete the charging process, so that the failure may be caused by the contactor, control circuit or power supply. Remove the contactor, and individually connect 24V DC, the contactor is working properly. And then check the 24V DC power supply and find the voltage regulator tube is damaged. After replacing it, VFD is working properly.

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