Isolation Transformer
LQHIT 150KVA/440V Two-Phase Isolation Transformer with Dual Electrostatic Shielding
Precision Power Isolation for Industrial Systems
Engineered for specialized industrial applications, this two-phase transformer features dual electrostatic shields that reduce electromagnetic interference (EMI) by up to 85dB. With <6% impedance and oil-immersed cooling, it minimizes partial discharge interference in critical 440V systems while maintaining exceptional voltage stability (±1.0%).
Technical Specifications
| Parameter | Specification |
|---|---|
| Rated Capacity | 150 kVA |
| Phase Configuration | Two Phase |
| Input Voltage | 440V AC |
| Output Voltage | 440V AC (0.44kV) |
| Rated Current | 340.9A |
| Short-Circuit Impedance | <6% |
| Frequency | 60Hz |
| Cooling System | ONAN (Oil Natural Air Natural) |
| Insulation Medium | 25# Transformer Oil (IEC 60296) |
Advanced Engineering Features
Dual Electrostatic Shielding
Copper-mesh 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 >97%.
Ultra-Low Impedance Design
Optimized <6% impedance delivers superior voltage regulation (±1.0%) with 98.8% efficiency at full load - outperforming standard industrial transformers by 20%.
Balanced Two-Phase Operation
Precision-engineered windings maintain <0.8% voltage imbalance between phases, critical for specialized industrial equipment requiring dual-phase power.
Performance Comparison
| Metric | Standard Transformers | LQHIT 150KVA |
|---|---|---|
| Partial Discharge Reduction | 50-60% | >97% |
| Voltage Stability | ±3% | ±1.0% |
| Impedance Voltage | 8-10% | <6% |
| Phase Balance | 2-3% | <0.8% |
| Efficiency at Full Load | 95-96% | 98.8% |
Industrial Applications
Specialized Manufacturing: Power for legacy two-phase machinery in textile and paper industries
Industrial Furnaces: Stable power for resistance heating systems
Water Treatment Plants: Reliable operation for high-torque pump systems
Mining Operations: Power for drilling equipment in harsh environments
Railway Workshops: Maintenance power for traction motor testing
Installation & Safety Features
Phase Balancing Technology: Maintains <0.8% voltage imbalance
Thermal Management: ONAN cooling maintains ≤48°C temperature rise
Overload Protection: Dual-stage thermal cutoffs (IEC 60076 compliant)
Pressure Management: Reinforced tank with pressure-relief diaphragm
Environmental Protection: IP55-rated enclosure for harsh conditions
Corrosion Resistance: Epoxy-coated core and tank
Technical Compliance
Manufactured to international standards:
IEC 60076 for power transformers
IEC 61558-2-4 for isolating transformers
IEEE C57.12.00 for general requirements
ISO 9001 quality management system
RoHS compliance for environmental safety
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