Project Type: Commercial Building Electrical Infrastructure – Dedicated Power Supply for HVAC Systems
Delivery Date: January 2025
Location: Riyadh, Saudi Arabia
End Client: Large Commercial Complex Developer
Application: Providing stable, isolated power for rooftop/modular HVAC package units.
TSTYNICE supplied a series of three-phase step-down dry-type transformers, specifically engineered for commercial HVAC systems in the Saudi market. This solution ensures efficient and reliable operation of air conditioning units under high-temperature and high-dust conditions.
Product Series & Supply Scope
Model: DT3-HVAC-380/230-60Hz
Ratings: 75 kVA, 100 kVA, 300 kVA (configured per zone requirements)
Total Quantity: 42 units (75 kVA: 18 units, 100 kVA: 15 units, 300 kVA: 9 units)
Type: Indoor epoxy resin cast dry-type transformer, Air Natural (AN) cooling
Mounting: Base-plate fixed, supplied with anti-vibration pads and cable connection compartments
Core Design & Performance Features
Precise Voltage Matching: Input 380-400V (with ±5% adjustable taps), output stable 220-230V, perfectly matching motor requirements of both imported and local HVAC units.
High Overload Capacity: Designed to withstand high inrush currents (up to 6x FLA) of HVAC compressors and periodic load fluctuations. Insulation system thermal class H (withstands 180°C).
Extreme Environment Adaptability:
Large thermal design margin ensures continuous full-load operation in Saudi ambient temperatures up to 55°C.
Standard IP23 enclosure or optional IP54, providing protection against dust, moisture, and dripping water.
Windings feature special anti-fungal and anti-corrosion treatment for coastal or highly polluted air environments.
High Efficiency & Energy Saving: Utilizes high-grade silicon steel and low-loss design, meeting IE2 or higher efficiency class (IEC 60076-11), reducing overall HVAC system energy consumption.
Safe & Quiet: Totally enclosed, oil-free, flame-retardant construction. Low-noise design (<65 dB) suitable for commercial building environments.
Easy Maintenance: Built-in PT100 temperature sensors enable remote temperature monitoring and alarms. Side cable exit design simplifies on-site wiring and maintenance.
Rapid Response: Initial delivery completed within 8 weeks from technical confirmation, meeting the client's tight schedule.
Customized Service: Provided capacity allocation and layout recommendations based on the client's HVAC unit distribution plans and load schedules.
Local Support: Supplied bilingual product documentation (English & Arabic), wiring diagrams, and installation guides. Coordinated with local partners for technical clarifications.
Testing & Certification: All units underwent full pre-delivery tests including ratio, impedance, dielectric strength, no-load/load losses, and partial discharge (<10 pC). Test reports complied with Saudi SASO requirements.
Improved Power Quality: Provides electrical isolation for HVAC units, effectively suppressing grid-side harmonics and voltage fluctuations that could affect sensitive AC controllers.
Enhanced System Reliability: Zero transformer failures since commissioning, ensuring continuous and stable operation of the commercial complex's HVAC system.
Energy Efficiency Optimization: High-efficiency transformers, combined with VFD-driven HVAC systems, contribute to the building's overall energy management goals.
