Isolation Transformer
LQHIT 15KVA Double Shield Isolation Transformer: 380V Input to 380V/220V Output
Advanced Noise Suppression Technology
This oil-immersed isolation transformer features dual electrostatic shields between HV/LV windings and coil assemblies, providing 60dB+ common-mode noise rejection. Specifically engineered to eliminate ground loops and suppress high-frequency interference that causes partial discharge measurement errors in sensitive test systems.
Technical Specifications
| Parameter | Specification |
|---|---|
| Rated Capacity | 15 kVA |
| Input Voltage | 380V AC (50Hz) |
| Output Voltages | 380V AC + 220V AC (Dual Output) |
| Input Current | 39.4A |
| Output Currents | 26.3A (380V) / 22.7A (220V) |
| Cooling System | ONAN (Oil Natural Air Natural) |
| Weight | 150kg |
| Dimensions (WxDxH) | 490mm × 660mm × 590mm |
Dual Shield Design Advantages
1. Primary Electrostatic Shield (HV-LV)
Blocks capacitive coupling between windings, reducing transverse-mode noise by 85% compared to standard isolation transformers.
2. Secondary Shield (LV-Coil)
Prevents core-induced interference, maintaining signal integrity for precision instruments operating below 1mV resolution.
ONAN Cooling Efficiency
Mineral oil circulation enables continuous 100% load operation with maximum 65°C temperature rise, exceeding IEC 60076 thermal requirements.
Industrial Applications
High-Voltage Test Stations: Isolate partial discharge detectors from grid harmonics
Industrial Automation: Clean power for PLCs and servo drives in manufacturing
Renewable Energy Systems: Stabilize output in solar/wind converter stations
Laboratory Equipment: Noise-free supply for precision measurement devices
Installation & Safety Features
Compact Footprint: 0.32m² base area for space-constrained facilities
Oil Containment: Sealed tank with pressure-relief valve meets IEC 60296 safety standards
Terminal Configuration: Color-coded bushings with IP54 protection for humid environments
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