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ATAF-H Series Medium Voltage Variable Frequency Soft Starter

Low power grid capacity requirements

High input power factor > 0.95

Fast response

High integration

The ATAF-H series medium voltage soft starter device is suitable for starting large and medium-sized medium voltage AC asynchronous motors and electrically excited synchronous machines. The soft starter device has characteristics such as low starting current, high starting torque, high input power factor, low demand on grid capacity, and smooth, impact-free starting. It has significant advantages that other voltage-reducing soft starter devices cannot match, especially in applications where the grid capacity is low and the starting current requirement is below the motor's rated current.

Classification：

Medium Voltage Variable Frequency Soft Starter

Key words：

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Product Details

Specifications

Application areas

◆ Adopts wave-by-wave soft start technology, always controlling the starting current below the motor's rated current, significantly reducing the demand for grid capacity during motor startup compared to other step-down soft starter devices.

◆ Input power factor > 0.95 (load > 20%), no auxiliary devices required, providing high-quality sine voltage and current during the motor startup process.

◆ A fast-response and reliable system built on a high-speed ARM, DSP, and FPGA control platform.

◆ Patented structural design, high integration, compact cabinet size, and high power density.

◆ Smooth and stable startup to rated speed, minimizing mechanical impact on the motor and load during startup, extending mechanical lifespan and maintenance cycles, effectively reducing life-cycle costs.

◆ Facilitates reasonable distribution of heat sources through computer simulation technology, optimizing structural design through various extreme condition analyses, strong electrical finite element analysis, and topological structure simulation analysis.

Specification Parameters

Working Conditions
Voltage Range	6~10kV AC
Compatible Motor Power	1500kW~50000kW
System Efficiency	>97%
Power Factor	Grid Side Power Factor ≥0.96
Input Rated Frequency	50Hz, ±5%
Frequency Resolution	0.01HZ
Maximum Output Frequency	120HZ
Output Frequency Accuracy	±0.1% Maximum Frequency
Speed Accuracy	±0.5%
Load Requirements	Three-phase Squirrel Cage Induction Motor, Synchronous Motor, Wound Rotor Motor
Starting Current	When starting at rated load or below, starting current ≤ 1 times the motor rated current
Control Power Supply	User provides 220V AC
Cooling Method	Forced Air Cooling
Installation Location	Indoor installation (no conductive dust, no severe vibration)
Environmental Conditions	Ambient Temperature: -20℃~+50℃
	Relative Humidity: 5%~95% No condensation
	Altitude less than 1500 meters (can derate for use above 1500 meters)
Set Parameters
Acceleration and Deceleration Time	0.1s ~ 3600s adjustable
Protection Parameters	Adjustable
Starting Method	Adjustable (local, button, remote, combination)
Protection Functions
Current Overload Capacity	125% rated current for 1 minute, 150% rated current for 1 second
Input Voltage Unbalance	Default fixed unbalance degree
Output Voltage Unbalance	Default fixed unbalance degree
Detection Function
Current Detection	Phase Current
Voltage Detection	Power Supply Input Voltage and Output Voltage
Communication Interface
Communication Interface	RS-485 interface and Profibus interface optional
Operating Interface
LCD Display	Chinese/English display, showing various statuses and set parameters
Keyboard	Membrane Keypad
Status Indicator Lights	Including: Power, Start, Run, Fault
Memory Function
Event Record	Historical events can be recorded

The ATAF-H series medium voltage variable frequency soft starter devices are widely used in industrial fields, especially in industries such as steel, machinery manufacturing, cement production, metallurgy, mining, oil extraction, chemical, water treatment, and petrochemicals. They are mainly used to start and control large motors, such as pumps, fans, and compressors, significantly reducing current and mechanical shocks during startup, thereby improving production efficiency and safety.

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The ATA QB-7 series motor soft starter is a new type of device that integrates power electronics technology and the latest motor control theories. It can be widely used in loads such as fans, water pumps, compressors, and ball mills, making it an ideal replacement for traditional starting devices like autotransformer reduced voltage starters, star-delta starters, and magnetic control reduced voltage starters.

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