4 HP (3.7 kW) Single Phase to Three Phase Converter

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SKU: PH-SP3PC-3KW

$3,145.99

● 3kW rated output converts single-phase AC power to stable three-phase power for compatible industrial equipment and motor-driven loads. ● Pure sine wave output with ≤2% THD, 120°±1° phase angle, and ≥94% efficiency provides stable three-phase power. ● Multiple input and output voltage options, including common 220V, 380V, 400V, 415V, 440V and 480V three-phase equipment. ● LCD monitoring and selectable startup modes allow users to view voltage, current, frequency, output power and fault information.

Input Voltage (Single phase) *
Output Voltage (Three phase) *
Input Frequency *
Output Frequency *
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Overview
Specs
Application
FAQ
Reviews

Overview

It provides a rated 3kW three-phase pure sine wave output and can be configured for different input/output voltages and 50Hz or 60Hz operation.It can be used with compatible machine tools, pumps, woodworking equipment, agricultural machinery and other three-phase loads. Motor applications must be sized according to the motor starting method, starting current and load characteristics rather than motor running power alone.

Recommended Converter Capacity

Load Configuration	Recommended Converter Capacity	Approx. Motor Power for a 3kW Converter
Direct-start motor	Motor rated power × 5–7	0.43–0.6 kW
Soft starter + motor	Motor rated power × 3 or more	Up to 1 kW
VFD + motor	Motor rated power × 1.5–2	1.5–2 kW

The motor power values above are approximate and are based on the recommended sizing ratios. Actual converter sizing depends on motor starting current, starting method, load torque, and operating conditions.

Not sure which size you need?

Motor loads should not be sized by rated kW alone. Check the motor nameplate, starting method and load type before ordering.

Feature

Customizable Power Parameters: Input voltage, output voltage, and frequency can be customized to meet different power supply requirements.
Pure Sine Wave Output: Phase converter provides stable pure sine wave output with low waveform distortion and fast transient response.
High Conversion Efficiency: Uses SVPWM control technology with conversion efficiency up to 94% and low no-load loss.
Isolation Transformer Design: Built-in low-frequency isolation transformer ensures electrical isolation and reduces interference.
Dual Startup Modes: Supports step-down start and variable frequency start, selectable via LCD according to load type.
Stable and Clean Power: Filters grid interference and delivers stable voltage and frequency for sensitive equipment.
Comprehensive Protection: Includes overvoltage, overload, short circuit, and overheating protection for reliable operation.

Details

Status Display LCD: Displays voltage, current, frequency, power, and fault codes for real-time monitoring.
SPD: Built-in surge protection device protects equipment from voltage spikes.
Circuit Breaker: Provides overload and short circuit protection for safe operation.
Wiring Hole: Designed for easy cable routing and installation.
Input / Output Terminal: Clearly marked terminals ensure secure single-phase input and three-phase output connections.

Single phase to three phase converter detail

Dimension

3kw single phase to three phase converter size

Wiring Instructions

Single Phase

Split Phase

Specs

Rated Output Power	3 kW (4 hp)
Weight	85kg
Output Waveform	Standard pure sine wave
Wide Voltage Input	110-480V AC (can customization)
Input Voltage	Optional: 110V/ 120V/ 220V/ 230V/ 240V/ 380V/ 415V/ 440V/ 480V single phase 2 wire
Input Current	Refer to selected input voltage and rated load; contact us for exact current specifications.
Output Voltage	Optional: 220V/ 380V/ 400V/ 415V/ 440V/ 480V 3 phase 4 wire+PE
Output Current	4.3A at 400V
Input Frequency	50Hz/ 60Hz
Output Frequency	50Hz/ 60Hz
Startup Mode Selection	Stable frequency step-down start or frequency start, can be selected on the LCD screen settings
Frequency Stability	≤0.01%
Load Regulation	≤3%
THD	≤2% (Linear load)
Phase Angle	120^°±1^°
Crest Factor Ratio	3:1
Circuit Mode	IPM module, SVPWM modulation
LCD Display	Output voltage, output current, output frequency, output power, fault code, time temperature, startup mode selection, setting parameters
Protection	Input under voltage, overvoltage, output over-current, short circuit, overheating etc.
Protective Reaction Time	≤2ms
Machine Efficiency	≥94%
Insulation Properties	1800V AC/ 10mA/1 min
Insulation Impedance	500V DC/ 50MΩ
Cooling Method	Forced air cooling
Noise	1m> 60dB
Ambient Temperature	-25℃~+55℃
Humidity	0~95% (No condensation)
Size	450mm(L) * 550mm(W) * 760mm(H)

Single Phase to Three Phase Converter.PDF

Application

CNC Machines

Air Compressors

Woodworking Machinery

Agricultural Equipment

FAQ

Q1: Can I use this converter with a 3kW three-phase motor?

Not necessarily. Converter rating and motor rated power should not be matched 1:1 for motor applications. Starting current, starting method and load type must be considered.

Q2: Can this phase converter run an air compressor?

Yes, provided the converter is sized for the compressor's starting current. Compressors are typically hard-starting loads and may require a larger converter than their running kW alone suggests.

Q3: Can 3kW phase converter power a CNC machine?

It may be used with compatible CNC equipment, but the complete machine load must be checked, including spindle motor, servo drives, control electronics, internal VFDs and required input voltage. Can I use 240V single phase input and get 400V or 480V three phase output?

Q4: What information should I provide before ordering?

Please provide the available single-phase input voltage and frequency, required three-phase output voltage and frequency, equipment rated power, motor HP/kW and nameplate current, starting method, and whether multiple loads will operate simultaneously.

1 review(s)

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From: Jennifer | Date: 5/27/2026 7:34 AM

Finally Got My Old Shop Machines Running

"I've got a workshop at home but only single-phase power coming in. Been wanting to run some old industrial gear I picked up for cheap – all three-phase stuff that would've cost a fortune to actually get wired up. This thing solved that problem overnight. Hooked it up, and my lathe and compressor are running smooth as butter. The screen on the front lets you see what's going on, so you're never guessing if everything's happy. Also nice that it's basically plug-and-play once you get the wiring sorted. Frees you up to buy used three-phase equipment without having to pay for a whole electrical service upgrade. Solid buy.

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