LQTT Series 250kV/20kVA High-Precision Test Transformer

(Cylinder Type | Single Phase | Ultra-Low PD)

Key Innovations

✅ Industry-Leading Precision:

• <2pC Partial Discharge at rated voltage (IEC 60270 Class II)

• <3% Waveform Distortion (vs. industry-standard ≤5%)

• Dielectric Loss <0.5% (Tan δ)
  ✅ High-Efficiency Design:

• 20kVA Output (33%↑ vs. 15kVA models)

• ONAN Cooling with optimized thermal profile
  ✅ Rugged Duty Cycle:

• 60 min @ 100% load (250kV/80mA)

• Continuous @ 80% load (200kV/64mA)

Technical Specifications

Engineering Superiority

1. Unmatched Accuracy

• <3% THD waveform ensures precise dielectric tests (IEC 60060-1)

• 100V measuring winding enables real-time calibration (±0.2% accuracy)

2. Dielectric Integrity

• <0.5% dielectric loss (critical for cable/bushing diagnostics)

• 5kV/1min LV withstand exceeds ANSI C57.12.90 safety requirements

3. Thermal Efficiency

• Compact cylinder design (Ø700mm) with 25%↑ power density vs. conventional units

• Validated thermal stability:

            Continuous Operation: 16kVA (80% load) @ ΔT≤65K  

            Peak Load: 20kVA (60 min) @ ΔT≤55K oil rise  

Target Applications

• Precision PD Mapping (cables, GIS, transformers)

• Type Acceptance Tests per IEC 60840/62067

• HV Component Certification (bushings, insulators)

• Research Lab Applications (dielectric response analysis)

Competitive Advantages

► Higher Voltage Stability: ≤8% impedance ensures minimal droop during load steps
► Reduced Footprint: 1580mm height fits standard lab ceilings
► Calibration-Ready: 100V output simplifies reference measurements
► Global Compliance: Meets EU (EN 50588), UK (BS 923), and APAC electrical codes