Isolation Transformer
LQHIT 150KVA/440V-380V Three-Phase Isolation Transformer with Dual Electrostatic Shielding
Precision Voltage Conversion for Industrial Power Systems
Engineered for North American industrial facilities, this transformer provides stable 440V to 380V conversion with exceptional accuracy (+0.3% voltage ratio). Dual electrostatic shields reduce electromagnetic interference by up to 85dB while maintaining ≤55dB operational noise - critical for sensitive measurement systems in manufacturing environments.
Technical Specifications
| Parameter | Specification |
|---|---|
| Rated Capacity | 150 kVA |
| Phase Configuration | Three Phase |
| Input Voltage | 440V AC |
| Output Voltage | 380V AC |
| Frequency | 60Hz |
| Impedance Voltage | <5% |
| Voltage Ratio Accuracy | +0.3% |
| Noise Level | ≤55dB(A) at 1m distance |
| Cooling System | NOAN (Oil Natural Air Natural) |
| Dielectric Medium | 25# Transformer Oil (IEC 60296) |
Advanced Engineering Features
Dual Electrostatic Shielding
Copper-foil barriers between HV-LV and LV-coil assemblies provide 360° EMI protection, attenuating common-mode noise >80dB in the 10kHz-2MHz spectrum - reducing partial discharge interference by >95%.
Ultra-Low Impedance Design
Precision-engineered <5% impedance delivers superior voltage regulation (±1.2%) with 98.5% efficiency at full load - outperforming standard industrial transformers by 18%.
Silent NOAN Cooling
Optimized radiator fins and vibration-damping mounts achieve ≤55dB noise levels - 40% quieter than comparable units - ideal for noise-sensitive facilities.
Performance Comparison
| Metric | Standard Transformers | LQHIT 150KVA |
|---|---|---|
| Voltage Ratio Accuracy | ±2% | +0.3% |
| Impedance Voltage | 6-8% | <5% |
| Operational Noise | 65-75dB | ≤55dB |
| Partial Discharge Reduction | 50-60% | >97% |
| Efficiency at Full Load | 94-96% | 98.5% |
Industrial Applications
Manufacturing Plants: Voltage conversion for 480V to 380V equipment in automotive production
Industrial Automation: Clean power for 60Hz PLCs and servo drives
Data Centers: Precision power conditioning for server racks
Water Treatment Facilities: Reliable operation for high-torque pump systems
HVAC Systems: Stable power for large commercial chillers
Installation & Safety Features
Phase Balancing Technology: Maintains <1% voltage imbalance across phases
Thermal Management: NOAN cooling maintains ≤50°C temperature rise at full load
Overload Protection: Dual-stage thermal cutoffs (IEC 60076 compliant)
Vibration Control: Multi-axis damping mounts reduce noise transmission
Environmental Protection: IP55-rated enclosure for harsh conditions
Corrosion Resistance: Epoxy-coated core and tank for humid environments
Technical Compliance
Manufactured to international standards:
IEC 60076 for power transformers
IEEE C57.12.00 for general requirements
CSA C22.2 No. 66 for North American markets
ISO 9001 quality management system
RoHS compliance for environmental safety
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