100kV ~ 400kV Range
LQTT Series 270kV/54kVA High-Voltage Test Transformer
(Cylinder Type | Single Phase | Precision PD Testing)
Key Performance Advantages
✅ Enhanced Voltage Output: 270kV Rating (7%↑ vs. industry-standard 250kV units)
✅ Advanced PD Sensitivity:
<5pC @ 100% Uₕ (270kV)
<3pC @ 80% Uₕ (216kV) - Best-in-class for diagnostic testing
✅ Optimized Power Density: 54kVA Capacity at <1500kg (35% lighter than comparable units)
✅ Robust Thermal Management: ONAN cooling with validated thermal limits
Technical Specifications
| Parameter | Value | Standard |
|---|---|---|
| Electrical | ||
| Frequency | 50 Hz | IEC 60076 |
| Input Voltage | 0.4 kV | |
| Input Current | 135 A | |
| Output Voltage | 270 kV | *(Calculated: 54kVA/0.2A)* |
| Output Current | 0.2 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 @ 270kV/0.2A | |
| Continuous Operation | Unlimited @ 216kV/0.16A | |
| Mechanical | ||
| Dimensions | Ø1200 × 2300 mm | (Corrected notation) |
| Weight | <1500 kg | ISO 9001 |
Engineering Innovations
Voltage-Scaled PD Performance
100% Uₕ (270kV): <5pC → Production-line testing
80% Uₕ (216kV): <3pC → Critical defect identificationExceeds IEC 60270 Class II requirements for switchgear validation
Compact High-Voltage Design
Ø1200mm cylinder tank with optimized core geometry
2300mm height enables standard lab installation
Power-to-weight ratio: 36 VA/kg (industry average: 25 VA/kg)
Stable Power Delivery
Continuous 80% load (43.2kVA):
- Winding ΔT ≤65K
- Oil ΔT ≤55K≤10% impedance ensures <2% voltage drop at full load
ONAN cooling maintains thermal safety margins:
Target Applications
GIS Partial Discharge Mapping (IEC 62271-203)
270kV Cable Qualification Testing (IEC 60840/62067)
Transformer Impulse Testing with cascaded units
HVDC Component Validation
Competitive Advantages
► Diagnostic Precision: <3pC sensitivity at 216kV enables micro-defect detection
► Future-Proof Voltage: 270kV headroom for next-gen 245kV equipment testing
► Portability: Forklift pockets & lifting lugs for field deployment
► Compliance: Meets CE (EN 50588), UKCA (BS EN 60076), and CNAS (GB/T 16927)
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