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Motor Starters
4 Series · 55 Models
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Motor Starters Overview
Motor starters control three-phase motor energization with reduced-voltage methods that limit inrush current and mechanical stress. QDTB cabinets offer star-delta (Y-delta), auto-transformer, and electronic soft starting for motors from 2.2 kW to hundreds of kilowatts at 380 V/440 V/660 V. Series QX4 (star-delta), JJ01 (auto-transformer), and RS/RC (soft start) reduce starting current 3-5 times with overload, phase-loss, and short-circuit protection for pumps, fans, compressors, conveyors, and crushers.
Available Series
QX4 Series
The QX4 series motor starting control cabinets provide complete motor starting solutions including direct-on-line, star-delta, and auto-transformer starting methods.
JJ01 Series
The JJ01 series liquid resistance motor starters provide smooth, stepless starting for large slip-ring induction motors using liquid rheostat technology.
RS Series
The RS series electronic soft starters use thyristor technology for smooth, controlled acceleration of three-phase induction motors with reduced mechanical stress.
RC Series
The RC series motor running control cabinets provide complete motor control and protection solutions including speed control, reversing, and multi-motor coordination.
Instant Selection & Quote Calculator
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| Base price (interpolation) | $248 |
| × Product factor | ×1.0000 |
| × Country factor | ×1.0000 |
| × Copper-linked factor | ×1.0000 |
| + Options / accessories | $0 |
Complete equipment — no winding copper linkage
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Application Scenarios
Pumps & Water Systems
Reduced-voltage starting protects pumps from mechanical and electrical shock.
Large Fans & Blowers
Soft starting for HVAC and industrial fans with high inertia.
Air Compressors
Cuts starting current and mechanical stress on compressor motors.
Conveyors & Material Handling
Smooth starts for conveyors, avoiding belt slip and load shock.
Crushers & Mills
Handles high-inertia, heavy-starting loads in mining and aggregates.
HVAC Systems
Reduced inrush for chillers, compressors and pumps in buildings.
Technical Advantages
Multiple Starting Methods
Star-delta, auto-transformer and electronic soft-start from one supplier.
Reduced Starting Current
Cuts starting current 3-5x, protecting the motor and supply network.
Comprehensive Protection
Overload, phase-loss, short-circuit and under-voltage protection.
Wide Power Range
From 2.2 kW to hundreds of kW across the product families.
FAQ - Motor Starters
What is the difference between star-delta and soft start?
When should I use a soft starter?
Can it start heavy loads?
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