LQTT Series 70kV/35kVA High-Voltage Test Transformer | Industrial Dielectric Testing

Engineered for demanding electrical testing applications, the LQTT 70kV/35kVA Test Transformer delivers precision performance with robust overload capabilities. Featuring ultra-low partial discharge levels and dual-frequency operation, this cylinder-type unit is ideal for cable, transformer, and switchgear testing in compliance with international standards.

Core Technical Specifications

Premium Performance Metrics

• Partial Discharge Level: <3 pC at 100% U_H (complete test system)

• Waveform Distortion: ≤5% (IEC 60060-1 compliant)

• No-load Current: <10%

• Insulation Strength: 3kV/1min withstand (LV terminals to ground)

Advanced Operational Capabilities

• Overcurrent Withstand: 150% rated current (0.75A) for 300s – no damage to windings or insulation

• Overvoltage Capability: 110% rated voltage (77kV) for 60s – no insulation failure

• Thermal Management:

• 60 minutes continuous operation at 100% rating

• Unlimited operation at 80% rated voltage/current

• Winding temperature rise ≤65K

• Oil surface temperature rise ≤55K

Design & Construction

• Cooling System: ONAN (Oil Natural Air Natural)

• Configuration: Cylinder-type tank, single phase

• Safety Standards: Designed for industrial testing environments