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ATA QB-7 Series Motor Soft Starter

Diversified start and stop modes

Multiple user interfaces

Perfect protection function

Powerful memory function

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.

Classification：

Low Voltage Soft Starter

Key words：

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Product Details

Specifications

Application areas

◆ Diversified Start-Stop Modes

The ATA QB-7 series products have four starting modes: voltage ramp start, current ramp start, current-limited start, and heavy load (inrush) start.

◆ Superior Structural Design

Dual CPU structure with mutually redundant reliability design, unique compact internal structure design, facilitating user integration into existing systems. The built-in bypass type lowers the cost of external accessories and reduces the equipment's footprint.

◆ Rich User Interfaces

Standard 485 communication, optional PROFIBUS communication, 1 fault output (passive), 2 programmable relay outputs (passive), 2 programmable logic inputs (active), 1 programmable logic output (active), users can configure according to their needs.

◆ Comprehensive Protection Functions

Protection functions include overcurrent, motor overload, three-phase current imbalance, over/under voltage, phase loss, overheating, underload, PTC, and thyristor short circuit.

◆ Strong Expandability

Expandable functions: Internet real-time monitoring module or leakage detection module can be selected for expansion based on needs. (Both are optional accessories but cannot be used simultaneously; only one module can be selected for expansion).

◆ Complete Display Functions

The LCD screen display meets various working conditions, supports language switching between Chinese and English, and supports expandable display screens, facilitating the use of complete cabinets.

◆ Powerful Memory Function

Dynamic fault memory of over 80 entries, allowing users to easily find the cause of faults at any time, regularly updated, saving storage space.

◆ Rich System Communication Functions

Built-in communication port, this function allows direct communication with the upper PC to achieve remote control and remote signaling functions. (Standard RS-485 interface, optional PROFIBUS interface).

◆ Diversified Wiring Methods

Applicable to both internal and external wiring methods for motors.

Standard Type

ATA QB-7 Series Standard Soft Starter		System Voltage	Installation Dimensions		External Dimensions			Mounting Holes
Appearance	Power (kw)	(V)	H1 (mm)	W1 (mm)	H (mm)	W (mm)	D (mm)	K (mm)
A	8-55	380	381	200	453	242	190	10
B	75-110	380	399.5	230	499	270	208.5	10
C	132-200	380	429.5	260	531	300	208.5	10
D	250-320	380	459.5	270	559	315	208.5	10
E	400	380	450	446	631	470	288	10
F	500	380	537	644	734	668	355.5	11
G	600-800	380	483	893.5	1045	915.5	500	11
B	132-200	690	399.5	230	499	270	208.5	10
C	250-400	690	429.5	260	531	300	208.5	10
D	500-600	690	459.5	270	559	315	208.5	10

Built-in Bypass Type

ATA QB-7 Series Built-in Bypass Soft Starter		System Voltage	Installation Dimensions		External Dimensions			Mounting Holes
Appearance	Power (kw)	(V)	H1 (mm)	W1 (mm)	H (mm)	W (mm)	D (mm)	K (mm)
A	8-55	380	381	200	442	242	190	9
B	75-110	380	399.5	230	496	270	246.5	9
C	132-200	380	430.5	260	543	300	270	9
D	250-320	380	459.5	270	582	315	267	9
B	132-200	690	399.5	230	496	270	246.5	9
C	250-400	690	430.5	260	543	300	270	9
D	500-600	690	459.5	270	582	315	267	9

Item		Technical Specifications
Main Circuit	Power Device	Thyristor Module/Standard Thyristor
	Main Circuit Power Supply	Three-phase 380V +10%-15%, 50/60Hz
	Main Circuit Power Consumption	<2W per phase per ampere
	Power Device Voltage	≥1400V
	dv/dt Protection	RC Filter Circuit, Varistor
Control Circuit	Control Circuit Voltage	AC 220V (+10%, -15%), 50/60Hz
	Control Circuit Power Consumption	5W
	Start Command	Passive Contacts, Keyboard, Computer Commands
Starting Parameters	Starting Method	Current Ramp, Current Limiting Start, Voltage Ramp
	Starting Voltage	30%~90% (System Voltage)
	Starting Time	5~120s
	Jump Time	0~3s
Stop	Free Stop
Stop	Soft Stop	0~30s
Fault Protection	Power Supply Fault Protection	Phase Loss, Undervoltage, Overvoltage
Fault Protection	Equipment Fault Protection	Overheating, Motor Overload, Motor Phase Loss, Start Timeout, PTC Protection, Underload, Three-phase Imbalance, Thyristor Short Circuit, Overcurrent, Ground Leakage Protection, etc.
Online Monitoring	Display	Starting, Running Status and Starting, Running Current and Voltage, Active Power (optional) and Power Factor (optional)
Auxiliary Output	Relay Output 1	Normally Open Relay Contact, AC250V/2A
	Relay Output 2	Normally Open Relay Contact, AC250V/2A
	Fault Relay Output	Relay Contact, AC250V/2A
	Logic Output 1	Open Collector Output (+12V, +24V), 50mA
	Logic Output 2	Open Collector Output (+12V, +24V), 50mA
	Analog Output	4~20mA or 0~20mA Standard Signal
Digital Communication	Communication Interface	Standard 485, PROFIBUS Optional
Environmental Conditions	Operating Temperature	-5~+40℃
	Storage Temperature	-25~+55℃
	Relative Humidity	20~90%, Non-condensing
	Altitude	<2000m, Rated Value Unchanged
	Altitude	>2000m, Rated Value -5%/100m
	Product Technical Standards	GB 14048.6-2016

The ATA QB-7 series soft starter for AC motors is widely used in fields such as power, chemical industry, petrochemical, mining, airports and ports, construction, and papermaking, to control motors, reduce grid impact, extend equipment life, and lower maintenance costs.

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ATA QB-7 Series Motor Soft Starter

Diversified start and stop modes

Multiple user interfaces

Perfect protection function

Powerful memory function

Product Consulting

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