The KNS series intelligent motor type soft starter is a new type of starting equipment that adopts power electronics technology, microprocessor technology, and modern control theory technology and is currently internationally advanced. This product can effectively limit the starting voltage of asynchronous motors during startup, and can be widely used in heavy-duty equipment such as fans, water pumps, conveyors, and compressors. It is an ideal replacement product for star/delta conversion, self coupling voltage reduction, magnetic control voltage reduction, and other voltage reduction starting equipment.

Technical Features

Three startup parameters are optional, making it convenient for one motor soft starter to start different motor loads of different powers

Dynamic applause memory function, easy to find the cause of faults

Comprehensive motor protection functions such as overcurrent, three-phase current imbalance, overheating, phase loss, and motor overload

Powerful software functions and rich hardware configurations easily meet the constantly changing needs of various industry occasions

Profibus/Modbus communication protocols available for selection

Compact mechanism design, easy to install and use

Humanized operation mode with flexible selection of LED or LCD display on the display interface, making operation easy and convenient

Menu tree grouped by function for easy operation

operational principle

The main circuit of the KNS series intelligent motor soft starter adopts a thyristor reverse parallel connection and is connected in series to the stator circuit of the AC motor. By utilizing the electronic switch function of thyristors, the conduction angle of thyristors is changed through the trigger angle change of the microprocessor controller, thereby changing the input voltage of the motor to achieve the goal of controlling the soft start of the motor. After the startup is completed, the output of the soft starter reaches the rated voltage, which controls the three-phase bypass contactor KM to close and put the motor into operation in the power grid.

Usage conditions

Protection level: Ip00

Vibration resistance: in accordance with IEC 68-2-6: 1.5mm peak value for 2 to 13Hz/1gn for 13 to 200Hz

Impact resistance: in accordance with IEC 68-2-27: 15g, 11ms

Maximum environmental pollution level: Level 3, in accordance with IEC 947-4-2

Maximum relative humidity: 93% non condensing or dripping, in accordance with IEC 68-2-3

Environmental temperature: Storage: -25 ℃ to+70 ℃ Operation: 10 ℃ to+40 ℃ No capacity reduction: Maximum+60 ℃, current decreases by 2% for every 1 ℃ increase above 40 ℃

Maximum operating height: 2000m without capacity reduction (above 2000m, for every 100m increase, the current decreases by 0.5%)

Operating position: vertical position, within ± 10 ° (above 2000m, with an increase of 100m, the current decreases by 0.5%)

Technical parameters:

Main circuit working voltage: AC380/500V (+10% -25%)

Main circuit working current: 11A~1500A

Main circuit frequency: 50/60Hz

Main circuit power supply: 110V -220V ± 15% (0.5A) AC/DC

Soft start rise time: 1~120S

Soft parking time: 0~60s

Current limiting multiple: 1.5~5.0Ie

Initial voltage: 25%~80% Ue

Cooling method: natural cooling

Communication method: RS485 serial communication

Start times ≤ 10 times/hour

Application occasions

The KNS series intelligent motor soft starter is widely used in various industries such as power, metallurgy, petroleum, truthfulness, mining, chemical, construction, building materials, municipal, military, light industry, textile printing and dyeing, papermaking and pharmaceutical.

Model parameters