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High Frequency Single Phase Inverters For Solar System , variable frequency drives

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Address: 5/F, Building 15&16, Widsomland Business Park, Road 2 Nantou port, Nanshan District, Shenzhen, China

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High Frequency Single Phase Inverters For Solar System , variable frequency drives

Country/Region china
City & Province shenzhen guangdong
Categories Socks & Stockings

Product Details

220v Single Phase Inverters V / F control drive VC Frequency Inverter 3.7KW UT512-3R7G1-1XA0


1) Quick description :


  1. No encoder vector control, torque response speed≤20ms,
  2. No encoder vector control, torque control accuracy ±1%,
  3. No encoder vector control, 150% rated torque at 1Hz,
  4. Widely voltage range, allowable voltage swing range is ±15%,
  5. High overload capacity, 150% rated currency 60 seconds, 180% rated currency 2 seconds, 200% instantaneous trip


2) Detail description : 


Tech. Specification



Power Input

Voltage, frequency 

single phase 220V, 3 phase, 

220V,380V, 660V and 11140V

Allowable fluctuations

Voltage:<±15%; frequency±5%
Distortion of voltage to confirm to IEC61800-2

Closing striking current 

less than rated current

Power Factor

≥0.94( integrated DC reactor)



Power Output

Output Voltage

3 Phase, 0~Input voltage, tolerance less than 

5% in standard rating condition

Frequency Control Range

G type: 0 to 400Hz, P type: 0-400Hz,

 Z type: 0-400Hz, L type: 0-400Hz,

H type: 0-3000Hz.

Output frequency accuracy

±5% of maximum frequency 

Overload Tolerance

Z type: 150% rated current for 60 sec, 

180% rated current for 30 sec, 250% rated 

current for instantaneous 

G, H, L type model: 150% of rated output 

current for 60 sec,180% of rated current for 10s, 

2 00% of rated current for instantaneous

P type: 120% rated current 60 sec, 150% rated 

current for instantaneous

Key Control performance

Motor Control Mode

Open loop sensorless vector control without PG, 

V/F control 

Control system

Optimized Space Vector PWM Modulation

Carrier frequency 

0.6~ 15kHz, Randomly-modulated carrier

Speed control range

OLV without PG with rated load: 1:100,

Stable speed control accuracy

OLV without PG: less than 1% rated synchronous 


Torque response

OLV without PG control mode: ≤20ms

Frequency Accuracy
(Temperature Fluctuation)

Digital inputs: maximum × ±0.01%
Analog inputs: maximum × ± 0.2%

Frequency Setting Resolution

Digital inputs: 0.01 Hz
Analog inputs: 0.5% of maximum output

Standard Function

DC Braking

Starting Frequency: 0.00 to 50.00Hz,
Braking Time: 0.0 to 60.0s
Braking current: 0.0 to 150% rated current

Torque boost

Auto torque boost:0.0% to 100%
Manual torque boost: 0.0% to 25%

V/F curve

5 kinds curve programmable setting:

1 user setting, 1 of linear characteristic torque 

curve setting. 3 kinds derating torque setting

( 1.5 power, 1.7 power, 2.0 Power curve )

Accel / Decel. curve

Two kinds curve: line Accel/Decel, 

S curve Accel/Decel.
4 Accel/Decel time unit is 0.1s, 

maximum time 6500.0s

Rated output voltage

Power voltage compensation is available, 

setting range from 50 to 100%( rated voltage), 

the output voltage can't over than input

AVR Auto Voltage Regulation

automatic voltage regulation for 

keeping output voltage stable when 

fluctuation of grid

Auto energy saving running

Optimized the output voltage according 

the load to achieve energy saving

Auto current limit

Auto current limit during running mode to 

avoid trip occurs frequently

Momentary Power Loss with

no stop running function

To achieve continuous running with 

regenerative energy and DC bus voltage 

regulation when momentary power loss

Standard Function

PID control, Carrier frequency adjustable, 

current limiter, Speed Search, Momentary 

Power Loss restart,8 Step Speed (max), 

3-wire Sequence, Slip Compensation, 

Frequency Jump, Upper/lower Limits for 

Frequency Reference, DC Injection Braking 

at Start and Stop, Energy Saving Control, 

Modbus Comm RS485, Fault Restart, 

job function, Cooling Fan on/off Switch, 

timing stop, high pulse output, programmable 

auto running, swing frequency, counter,

frequency arriving detect and frequency 

lever detect.

Frequency Setting Methods

Keypad digital setting, potentiometer of keypad, 

analog voltage terminal VS1, analog voltage 

terminal VS2, analog current terminal AS, 

RS485 communication and multiple terminal, 

main and auxiliary composition setting.

Feedback Input Channel

voltage terminal VS1, VS2, current terminal AS, 

communication , and pulse input PUL

Running command channel

keypad given, external terminal given, 

communication given

Input command signal

Start, Stop, FEW/Reverse, Job, Multiple speed, 

free stop, Reset, Accel/Decel time, Frequency 

set point channel, External fault

Output signal 

2 Photo coupler relays: 2 (24 V, up to 50 mA)
1 Contact relays: 1 (250 Vac/up to 1 A, 30 Vdc/up 

to 1 A)
0-10V output, 4 to 20mA output
Frequency pulse output

Protection function

Overvoltage, under voltage, current limit, o

ver current, overload, electric thermal relay, 

overheat, Stall prevention, parameter lock

keypad Display

LED Display

One line digit-segments LED display to monitor 

1 running status

Double line digit-segment display to monitor 

1 running status

Parameters copy

upload and download parameter code to 

achieve easy copy

Monitor Function

Output frequency, Frequency set point, 

Out current, Output voltage, motor speed, 

PID feedback value, PID given setting, 

IGBT module temperature, I/O terminal status.


Overvoltage, under voltage, over current, 

short circuit, phase loss, over load, over heat, 

stall prevention, current limit, parameter lock 

damage, running status at present alarm, 

past trip alarm


Installation Site

Indoor, Altitude should less than 1000m, 

Free corrosive gases and direct sunlight

Running Temperature, humidity

-10~+40°C ( wall mounting), 
20% to 95% RH (No condensation)


Less than 0.5g when frequency less than 20Hz

Storage Temperature


Installation mode

Wall-mounted mode, floor stand cabinet install

Protection Degree


Cooling Method

Forced air-cooling


3) Product Packing

4) Certificate
5) Installation
The whole series use DC Fan, easily replacement, longer life. Penetrable installation has strong adaptability.  

Cabinet uses up and down design, standard reactors are installed in the base, to ensure better cooling, 

improve the application life and good wiring.

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