KE300B Series Single Tube Converter

KE300B series singe tube type inverter positioned as using the high performance of small power market; product using the leading international vector control algorithm, with excellent product features, compatible with wall and rail installation, and the product volume is smaller.

Features of KE300B Series Single Tube Converter

Small size and single tube machine

Voltage rating 220/380V,

Power rating range 0.4KW-2.2KW

Strong overload capability and good heat dissipation

Technical Specifications of KE300B Series Single Tube Converter


Input voltage

1AC/3AC 220V±15%, 3AC 380V±15%

Input frequency



Output voltage

0~rated input voltage

Output frequency

KE300X: V/f control: 0~3000Hz

Sensorless vector control: 0~300Hz

KE300B: 0~400Hz

Control Features

Control mode

V/f control(KE300X & KE300B-S2)

Sensorless vector control (KE300X & KE300B-T4)

Torque control (KE300X)

Operation command mode

Keypad control

Terminal control

Serial communication control

Frequency setting mode

Digital setting, analog setting, pulse frequency setting, serial communication setting, multi-step speed setting & simple PLC, PID setting, etc. These frequency settings can be combined & switched in various modes.

Overload capacity

150% 60s, 180% 10s, 200% 3s

Starting torque

Speed adjustment range

1:100 (SVC), 1:50 (V/f)

Speed control precision

±0.5% (SVC)

Carrier frequency

Frequency accuracy

Digital setting: 0.01Hz

Analog setting: maximum frequency * 0.05%

Torque boost

Automatically torque boost; manually torque boost: 0.1%~30.0%

V/f curve

Three types: linear, multiple point and square type (1.2 power, 1.4 power, 1.6 power, 1.8 power, square)

Acceleration/deceleration mode

Straight line/S curve; four kinds of acceleration/deceleration time, range: 0.1s~3600.0s

DC braking

DC braking when starting and stopping

DC braking frequency: 0.0Hz~maximum frequency, braking time: 0.0s~100.0s

Jog operation

Jog operation frequency: 0.0Hz~maximum frequency

Jog acceleration/deceleration time: 0.1s~3600.0s

Simple PLC & multi-step speed operation

It can realize a maximum of 16 segments speed running via the built-in PLC or control terminal.

Built-in PID

Built-in PID control to easily realize the close loop control of the process parameters (such as pressure, temperature, flow, etc.)

Automatic voltage regulation

Keep output voltage constant automatically when input voltage fluctuating

Control Function

Common DC bus

Common DC bus for several inverters, energy balanced automatically

Torque control

Torque control without PG

Torque limit

“Rooter” characteristics, limit the torque automatically and prevent frequent over-current tripping during the running process

Wobble frequency control

Multiple triangular-wave frequency control, special for textile


counting control

Timing/length/counting control function

Over-voltage & over-current stall control

Limit current & voltage automatically during the running process, prevent frequent over-current & over-voltage tripping

Fault protection function

Up to 30 fault protections including over-current, over-voltage, under-voltage, overheating, default phase, overload, shortcut, etc., can record the detailed running status during failure & has fault automatic reset function


output terminals

Input terminals

Programmable DI: 5 on-off inputs (KE300B: 4), 1 high-speed pulse input

1 programmable AI1: 0~10V or 0/4~20mA

Output terminals

1 programmable open collector output: 1 analog output (KE300X: open collector output or high-speed pulse output)

1 relay output

1 analog output: 0/4~20mA or 0~10V

Communication terminals

Offer RS485 communication interface, support MODBUS-RTU communication protocol

Human machine interface

LED display

Display frequency setting, output frequency,

output voltage, output current, etc.

Multifunction key

QUICK/JOG key, can be used as multifunction key


Ambient temperature

-10℃~40℃, derated 4% when the temperature rise by every 1℃ (40℃~50℃).


90%RH or less (non-condensing)


≤1000M: output rated power, >1000M: output derated

Storage temperature


Shenzhen MICNO Electric Co., Ltd.provides pv power booster,converter 220v to 380v, 220v to 380v three phase inverter, 380v to 220v converter, 220v to 380v inverter,

220v to 380v converter, solar voltage booster, micno inverter, etc. Contact us to knowmore.

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