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

5 out of 5 based on 2 reviews | Write a review

$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.

Input Voltage (Three Phase) ±15%

SKU: GK3000-4T0185G

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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/ GK3000-2T0185G
	Capacity	25 hp (18.5 kW)
	Shipping weight	8 kg
	Dimension	330200200 mm for GK3000-4T0185G/ 530320235 for GK3000-2T0185G
I/O Feature	Rated current	37A at 380V ~ 480V, 75A at 220V ~ 240V
	Input voltage	3 phase 240V /420V /480V AC ±15% (Optional)
	Input frequency	50Hz/ 60Hz
	Output voltage	3 phase AC 0~input voltage
	Output frequency	0Hz~1000Hz
	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

Note: ATO VFD Cannot be used as a power source, it Can only be directly connected to an induction motor to control the motor speed.

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.

How to Measure Circuits with a Digital Multimeter?

This video will show you how to measure electrical circuit using a digital multimeter.

VFD Two-Wire Control Wiring with Push Button for Forward Motor

In this video we've guided you through how to do VFD control wiring with a self-lock push button switch to run the motor in forward direction. We've covered everything from wiring to programming and even a test run. So just watch it through and hope you'll find it informative and helpful.

4-20mA speed Control on VFD

4-20mA is as common in analog control systems as 0~10V, and ATO GK3000 series VFDs are also perfectly compatible.

How to Control VFD with 0-10V (CI port)

This is port CI usage method for 0~10V to control the frequency of ATO GK3000 upgrade version. It is suitable for 1-phase, 1-phase to 3-phase, and 3-phase VFD.

VFD Analog Input 0-10V Frequency Control (VI Port)

ATO GK3000 VFD uses external voltage analog to control the frequency so as to achieve the purpose of motor speed regulation.

Control VFD with Potentiometer & Button (VI Port)

ATO GK3000 vector VFD supports control of synchronous motors, and supports external potentiometer and button control.

Forward and Reverse VFD Button Control

This video is for ATO GK3000 upgrade version VFD 1-phase to 3-phase & 3-phase VFD (3-wire control/external terminal control mode).

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

I have some questions

Does the position of the jumpers CI=I or V and / or A0=I or V have any importance?

From: Grinas | Date: 24/02/2025

Was this review helpful? Yes No (0/0)

ATO Responded

If your sensor is an analog current signal, then jumper JP3 needs to be connected to the I side, and the sensor signal line connects to the 24v and CI terminals.
If it is an analog voltage signal, jumper JP3 is connected to the V side, and the sensor signal line connects to the 24v and VI terminals.
Please refer to the video wiring part: https://www.youtube.com/watch?v=OKR4tX4x0qQ

What type of VFD does the motor need?

What type of vfd do I need for a 220 to 3 ph 5 hp motor?

From: Sardra | Date: 06/08/2021

Was this review helpful? Yes No (0/0)

ATO Responded

What is your motor rated current? And what is your supply voltage? Is it 1-phase or 3-phase?

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