Product Description：

The K13 factor three-phase isolation transformer is a three-phase dry-type isolation transformer specifically designed for high-harmonic nonlinear loads. Its core is rated at K=13, enabling it to withstand the additional heating caused by harmonic currents and ensuring stable operation under high-harmonic conditions. Suitable for medium to high harmonic scenarios (THDi ≤ approx. 60%), it accommodates 70%–90% nonlinear loads (e.g., data centers, UPS, variable frequency drives).

Core function: Does not eliminate harmonics, but through special design controls harmonic heating, prevents winding overheating, and extends service life.

Basic Parameters:

Rated capacity: 10kVA ~ 1000kVA
Input voltage: Three-phase 380V-690V (±10%)
Output voltage: Three-phase 380V-690V (±10%)
Frequency: 50/60Hz
Connection group: Dyn11
Cooling method: AN (natural air cooling) / AF (forced air cooling)
Insulation class: Class F (155°C), Class H (180°C)
Protection rating: IP00 / IP20 / IP54
Standards: IEC 60076-11, UL 5085, GB 6450

Key Design Features (Differentiating from Standard Transformers)

Winding design:
Uses wire rated above 180°C to withstand cover effect and harmonic heating
Increased conductor cross-section and optimized winding process to reduce additional harmonic losses
Enlarged neutral conductor capacity (suitable for three-phase imbalance and zero-sequence harmonics)
Core: Low-loss silicon steel sheets to reduce iron loss and lower temperature rise
Isolation & shielding: Primary-secondary electrical isolation + electrostatic shielding to suppress common-mode interference and reduce neutral-to-ground voltage
Temperature rise control: Under K13 harmonic load conditions, winding temperature rise does not exceed the insulation class limit.

Product Features:
High harmonic compatibility: K13 rated, perfectly suited for 70%–90% nonlinear loads (UPS, servers, VFDs, rectifiers)
Dry-type safety: Oil-free, fireproof, explosion-proof, maintenance-free — ideal for indoor use, data centers, hospitals
High efficiency & low noise: Efficiency ≥98%, noise <55dB (AN cooling) Long life & reliability: Class H insulation, optimized heat dissipation, supports 24/7 continuous high load (>95% load factor)
Flexible installation: Compact design, floor-mount or cabinet-mount options, suitable for industrial and building power distribution
Standards compliance: Meets IEC/UL/GB standards, suitable for demanding environments such as data centers, industrial facilities, and medical sites

Typical Applications:
Data centers: Servers, UPS, precision air conditioners, PDU power distribution
Industrial automation: Variable frequency drives (VFDs), servos, DC drives, welding equipment
Medical / Telecom: Medical imaging, operating room equipment, communication base stations, PBX
Commercial buildings: LED lighting, elevators, clusters of office electronic devices