Solcon-IGEL is a developer and manufacturer of soft starters, heat control systems, and motor control and protection solutions for heavy industry. Our power electronic technologies are engineered for reliable operation across a wide range of industrial motor applications worldwide.
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Soft Starters for Compressors in HVAC Industry - Singapore
Motor Ratings:
6600 140A/230/230
This project involved the supply and implementation of six medium voltage soft starters for a newly constructed district cooling plant in Singapore. The system supports centralized cooling infrastructure, where reliable compressor operation is critical for continuous service delivery.
Application Overview
District cooling plants operate large-scale compressor systems located close to end users. These installations are typically subject to:
- Limited grid connection capacity
- Strict utility regulations on starting current
- High operational continuity requirements
The application required controlled starting of multiple medium voltage compressor motors to ensure stable integration with the local electrical network.
Engineering Challenges
Grid Constraints
Due to proximity to consumers, the electrical infrastructure imposed strict limits on allowable voltage fluctuations during motor startup.
High Starting Currents
Direct-on-line starting of large compressor motors would result in significant inrush current, potentially causing voltage dips and impacting other connected loads.
Mechanical Stress
Uncontrolled motor acceleration increases stress on the compressor drivetrain, affecting long-term reliability and maintenance intervals.
Solution
Six medium voltage soft starters were deployed to manage the startup of the cooling compressors.
The solution provided:
- Reduced starting current to comply with utility limitations
- Controlled acceleration profiles to minimize voltage disturbances
- Torque management to protect mechanical components
Soft starter technology was selected due to its proven performance in compressor applications, particularly in environments where grid stability and equipment longevity are critical.
Results and Performance
The implementation delivered the following benefits:
- Stable network operation
Starting currents were significantly reduced, preventing voltage drops and ensuring compliance with grid requirements - Improved mechanical reliability
Reduced torque transients minimized wear on compressor components - Extended maintenance intervals
Lower mechanical stress contributed to longer service life - Consistent system performance
Reliable startup behavior supported continuous plant operation
Engineering Significance
This project demonstrates the importance of controlled motor starting in district energy systems, where electrical constraints and operational continuity must be balanced.
Medium voltage soft starters provide an effective solution for managing large compressor loads while maintaining both grid stability and mechanical integrity.
Positioning Statement
Solcon-IGEL delivers medium voltage motor control solutions for critical infrastructure applications, including district cooling systems, where reliability, compliance, and long-term performance are essential.
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