>400kV Range
LQTT Series 500kV/750kVA Multi-Frequency Test Transformer
Precision Power for Advanced Dielectric Testing Across Frequencies
Core Specifications
| Parameter | Value | Industry Advantage |
|---|---|---|
| Rated Capacity | 750 kVA | 25% power density increase |
| Output Voltage | 500 kV | Highest commercial test class |
| Output Current | 1.5 A | Enhanced load capability |
| Frequency Range | 50/60/100/120 Hz | Unprecedented flexibility |
| Configuration | Single Phase, Cylindrical Tank | Optimized field deployment |
Electrical Performance
Input/Output Configuration
| Winding | Voltage Rating | Current Rating | Configuration Flexibility |
|---|---|---|---|
| LV Input (2x) | 3 kV | 125 A | Series/parallel selectable |
| HV Output | 500 kV | 1.5 A | Fixed precision output |
Measurement & Monitoring
Precision Measurement Winding: 2000:1 ratio (±0.05% accuracy)
Waveform Integrity: ≤3% THD across all frequencies
Performance Excellence
| Parameter | Specification | Test Standard |
|---|---|---|
| Partial Discharge (PD) | <5pC @ 500kV, <3pC @ 400kV | IEC 60270 |
| Dielectric Loss (tan δ) | <0.4% | IEC 60894 |
| No-Load Current | <10% | IEEE C57.12.00 |
| Impedance Voltage | ≤12% | IEC 60076-5 |
| Noise Level | ≤60 dB @ 1m | ISO 3744 |
Robust Safety Engineering
Overload Protection
✅ **Over-Current:**
→ 120% (1.8A) for 300 seconds - zero damage guarantee
✅ **Over-Voltage:**
→ 110% (550kV) for 60 seconds - ≤5% waveform distortion
✅ **Surge Protection:**
→ 3kV MOA between LV windings
Thermal Management
| Operating Mode | Duration | Temperature Rise Limits |
|---|---|---|
| 100% Load | 60 min continuous | Winding: ≤65K, Oil: ≤55K |
| 80% Load | Unlimited | Maintains safety margins |
Multi-Frequency Superiority
Industry-Unique Capability
50/60 Hz: Standard power frequency testing
100/120 Hz: Specialized applications:
Accelerated aging tests (IEC 61294)
Aviation component validation
Submarine cable diagnostics
Technical Advantages
Frequency-Adaptive Core Design
Maintains ≤3% THD across 50-120Hz range - 5× better than conventional transformersResonance Testing Optimized
Enables sweep-frequency response analysis (SFRA) without auxiliary equipmentHarmonic Analysis Ready
Pure waveform output for IEEE 519-compliant testing
Physical Specifications
Cooling: ONAN (Oil-Natural Air-Natural)
Insulation Class: 550kV transient withstand
Safety Systems: Dual-redundant MOA protection
Environmental Rating: IP54 (standard)
Target Applications
Aerospace:
Component testing at 400Hz equivalent (120Hz operation)Offshore Wind:
Subsea cable commissioning at 100HzHVDC Converters:
Harmonic performance validationResearch Megalabs:
Dielectric spectroscopy at multiple frequencies
Compliance Statement
*"Engineered to exceed IEC 60060-1 and IEEE C57.12.90 standards. With revolutionary 50-120Hz frequency flexibility and industry-leading <3pC PD performance, this transformer delivers unprecedented versatility for next-generation high-voltage testing."*
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