Product Overview
The ASHAN ES Series 22kW Smart Online Soft Starter is a advanced solid-state motor controller engineered to reduce mechanical stress and electrical line disturbances during the startup and shutdown of 3-phase AC motors. Operating at 380V, this unit provides smooth acceleration and deceleration, eliminating the severe current spikes associated with Direct-On-Line (DOL) and Star-Delta starting methods.
Featuring a built-in bypass contactor, the ES Series transitions seamlessly to line power once full operational speed is reached. This "online" bypass design eliminates the need for an external contactor, drastically reducing heat generation, saving valuable panel space, and cutting overall installation costs. It is the definitive starting solution for heavy-duty induction motors powering industrial fans, centrifugal pumps, air compressors, and crushers.
Key Technical Advantages
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Integrated Bypass Contactor: Once the motor completes the soft-start ramp, internal bypass contacts close automatically. This eliminates thyristor heat losses during steady-state operation and extends the life of the unit.
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Specialized Starting Algorithms: Pre-programmed ramp profiles optimized for Pumps and Fans. Reduces water hammer in piping systems and prevents belt slippage in high-inertia fan applications.
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Inrush Current Reduction: Limits peak starting current to 1.5–4.5 times the rated motor current, protecting upstream transformers and preventing voltage drops in the facility's power grid.
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Comprehensive Motor Protection: Equipped with real-time diagnostic protections including overcurrent, phase loss, phase imbalance, overload, underload, and thyristor over-temperature protection.
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Compact & Easy Panel Integration: Small physical footprint designed for DIN-rail or wall mounting inside standard electrical enclosures, simplifying retrofits for older Star-Delta starters.
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Digital Operator Interface: Features an intuitive LED display and keypad for precise parameter adjustments, real-time operating current monitoring, and fault code diagnosis.
Technical Specifications
| Feature |
Detailed Specifications |
| Model |
ASHAN ES-022 (ES Series) |
| Rated Power (kW) |
22kW (30 HP) |
| Rated Current (A) |
45A |
| Input Voltage |
3-Phase 380V AC (± 15%) |
| Frequency |
50Hz / 60Hz (Auto-sensing) |
| Start/Stop Ramp Time |
1 to 60 seconds (Adjustable) |
| Starting Current Limit |
50% – 400% of Rated Current |
| Control Mode |
Voltage Ramp / Current Limit Ramp |
| Bypass Type |
Built-in Internal Bypass |
| Communication |
RS485 Modbus RTU (Optional) |
| Standard Compliance |
IEC 60947-4-2, CE |
Primary Application Scenarios
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Water Supply & Wastewater: Eliminates water hammer in high-pressure water delivery, booster stations, and sewage pumps.
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HVAC & Industrial Ventilation: Smooth torque ramp-up for large centrifugal exhaust fans, cooling tower fans, and air handling units (AHUs).
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Industrial Machinery: Soft starting for heavy-inertia loads like air compressors, ball mills, conveyors, and stone crushers.
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Irrigation Systems: Prevents pipe bursts and pressure surges in agricultural pumping networks.
Why Choose ASHAN ES Series Soft Starters?
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Cost-Effective Alternative to VFDs: If continuous speed control isn't required, soft starters offer a far more economical, compact, and energy-efficient solution than Variable Frequency Drives.
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Plug-and-Play Setup: Factory pre-set parameters allow for quick installation out of the box, requiring minimal adjustments for standard fan and pump applications.
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Rugged Conformal Coating: PCBA boards are treated with anti-corrosive coating to resist dust, humidity, and chemical vapors in demanding industrial environments.
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Direct Factory Support: Gain manufacturer pricing, complete technical manuals, and direct engineering support for custom panel integration.
FAQ
Q: Does this 22kW soft starter require an external bypass contactor?
A: No. The ASHAN ES Series features an integrated internal bypass contactor, meaning no additional external contactor is needed for continuous operation.
Q: What is the difference between a Soft Starter and a VFD?
A: A Soft Starter controls the motor's voltage during startup and shutdown to limit current and mechanical shock. A VFD controls both voltage and frequency to continually adjust motor speed throughout operation. For constant-speed pumps and fans, a soft starter is significantly less expensive and more efficient.
Q: Can this unit handle high-starting-torque loads?
A: Yes. You can adjust the starting voltage boost and current limitation parameters to accommodate heavier loads like loaded crushers or high-static pressure fans.
