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ATA QB-H Series Medium Voltage Motor Solid State Soft Starter

The ATA QB-H series medium voltage soft starter device combines computer control technology with power electronics technology, using high voltage high power thyristors as the main switching components in the circuit. By changing the conduction angle of the thyristors, it controls the smooth rise and fall of the motor voltage and achieves contactless on-off, enabling smooth start and stop of the motor. It starts the motor with an ideal current, effectively reducing the impact on the power grid, lowering equipment vibration, noise, and starting mechanical stress, thereby extending the service life of the motor and related equipment.

Classification：

Medium Voltage Soft Starter

Key words：

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Product Details

Specifications

Application areas

◆ Using high-voltage thyristors as the main circuit components, with voltage equalization protection and over-voltage protection systems:

◆ Advanced fiber optic and magnetic ring transmission technology to achieve isolation between the triggering detection of high-voltage thyristors and the low-voltage control circuit;

◆ Dual CPU structure, using advanced digital signal processor DSP for core control, and microcontroller for data and communication management, making device control real-time and efficient, with intuitive display, high reliability, and good stability;

◆ Multi-level signal processing and isolation technology, providing strong anti-interference capability for the system;

◆ Chinese/English display, membrane keys, simple operation, and user-friendly interface;

◆ Equipped with RS-485 or Profibus communication interfaces, allowing communication with host computers or centralized control centers.

Technical Parameters

Working Conditions
Voltage Range	2~15kV AC
Power Range	110kW~50000kW
Working Frequency	50Hz/60Hz ±1Hz
Phase Sequence Requirements	Allowed to operate under any phase sequence
Load Requirements	Three-phase squirrel-cage asynchronous motor, synchronous motor, wound rotor motor
Control Power Supply	User provides 220V AC
Cooling Method	Natural Cooling
Installation Location	Indoor installation (places without conductive dust and severe vibration)
Environmental Conditions	Ambient Temperature: -20℃~+50℃
	Relative Humidity: 5%~95% without condensation
	Altitude less than 1500 meters (can derate for use above 1500 meters)
Set Parameters
Soft Start Time	0~120 seconds adjustable
Soft Stop Time	0~60 seconds adjustable
Initial Voltage	20~80% adjustable
Rated Current	Adjustable
Protection Parameters	Adjustable
Jump Time	90% voltage 0.0~3.0 seconds, adjustable
Control Method	Adjustable (ramp voltage control, current limit control, ramp current control)
Starting Method	Adjustable (local, button, remote, combination)
Protection Functions
Phase loss, undervoltage protection	Undervoltage value adjustable
Power supply overvoltage protection	Overvoltage value adjustable
Running overcurrent protection	Automatic inverse time limit protection, CPU controlled
Thyristor component protection	Dynamic and static equalization
Instantaneous overvoltage protection	dv/df absorption network
Starting interval time protection	Starting interval time adjustable
Starting timeout protection	Protection exceeding soft start time setting
Interlock control protection	Mechanical and electrical interlock
Detection Functions
Current Detection	Phase Current
Voltage Detection	Power supply input voltage and motor operating voltage
Communication Interface
Communication Interface	RS-485 interface and Profibus interface optional
Communication Protocol	Modbus RTU and Profibus-DP protocol optional
Operating Interface
LCD Display	Chinese/English display, showing various statuses and set parameters
Keyboard	Membrane Keypad
Status Indicator Lights	Includes: Power, Soft Start, Running, Fault
Memory Function
Operation Memory	Can automatically download control parameters from EEPROM
Event Logging	Can record historical events

The ATA QB-H series medium and high voltage soft starter is suitable for soft starting of medium and large AC motors with a rated voltage of 2 to 15KV. The product is widely used in industrial fields such as iron and steel, petroleum, chemical, aluminum, fire protection, mining, sewage treatment, and power generation. It can be well matched with motor-driven equipment, such as: water pumps, fans, compressors, crushers, mixers, belt conveyors, and other electromechanical equipment.

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ATA QB-S Series Medium Voltage Motor Solid State Soft Starter

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ATA QB-S Series Medium Voltage Motor Solid State Soft Starter

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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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