100kV ~ 400kV Range
LQTT Series 300kV/30kVA High-Voltage Test Transformer
(Cylinder Type | Single Phase | Ultra-High Voltage Specialist)
Key Performance Highlights
⚡️ Industry-Leading Voltage: 300kV Output (20%↑ vs. standard 250kV units)
🎯 Precision Diagnostics: <5pC Partial Discharge at full 300kV (IEC 60270 Class II)
❄️ Optimized Thermal Design: ONAN cooling with strict ≤65K/55K temperature limits
⏱️ Robust Duty Cycle: 60 min @ 300kV continuous / Unlimited @ 240kV
Technical Specifications
| Parameter | Value | Standard |
|---|---|---|
| Electrical | ||
| Frequency | 50 Hz | IEC 60076 |
| Input Voltage | 0.4 kV | |
| Output Voltage | 300 kV | |
| Input Current | 75 A | |
| Output Current | 0.1 A | |
| No-Load Current | ≤10% | IEEE C57.12.00 |
| Waveform Distortion | ≤5% | IEC 60060-1 |
| Impedance Voltage | ≤10% | IEC 60076-1 |
| Thermal | ||
| Winding Temp Rise | ≤65 K (80% continuous) | IEC 60076-14 |
| Oil Surface Temp Rise | ≤55 K (80% continuous) | IEC 60076-14 |
| Duty Cycle | ||
| Peak Operation | 60 min @ 300kV/0.1A | |
| Continuous Operation | Unlimited @ 240kV/0.08A |
Engineering Superiority
300kV Precision Architecture
Specialized core design minimizes flux leakage at extreme voltages
Cylindrical tank with graded insulation rings (per IEC 61378-1)
Critical PD Performance
<5pC at 300kV ensures reliable detection of:
• Micro-voids in XLPE cables
• Contamination in bushings
• Delamination in transformer insulationThermal Resilience
Continuous 24kVA (80% load):
• Winding ΔT ≤65K
• Oil ΔT ≤55KValidated per IEEE C57.91 thermal aging model
ONAN cooling maintains safety margins:
Target Applications
300kV Cable Type Tests (IEC 60840/62067)
EHV Transformer Commissioning
Gas Insulated Switchgear (GIS) Diagnostics
High-Voltage Lab Research (lightning impulse testing)
Competitive Advantages
► Voltage Advantage: Tests 245kV-class equipment with 22% safety margin
► Future-Ready: Supports 600kV+ via cascading configuration
► Safety Compliance: Meets IEC 61010-1 (lab safety) and EN 50191 (test stations)
► Portability: Compact cylinder design vs. conventional EHV transformers
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