Precision 1500kV AC Test Transformer for High-Voltage Applications

Introduction
The LQ Series 1500kV/1500kVA AC Test Transformer delivers uncompromising performance for high-voltage testing laboratories, power utilities, and electrical equipment manufacturers. Engineered for precision waveform control and robust operation under extreme conditions, this transformer sets the standard for reliability in IEC-compliant dielectric testing.

Key Specifications

• Rated Capacity: 1500 kVA

• Output Voltage: 1500 kV (LV Parallel Input) / 750 kV (LV Series Input)

• Output Current: 1 A

• Frequency: 50 Hz

• Cooling: ONAN (Oil Natural Air Natural)

• Phase: Single

• Impedance Voltage: ≤13% (3-stage serial connection)

• Waveform Distortion: <3% (10-100% rated voltage)

• Dielectric Loss: tanδ < 0.4%

Critical Performance Features

1. Dual-Voltage Operation

• 1500 kV Output: Achieved via parallel input connection (2x 10kV, 2x 75A)

• 750 kV Output: Configured through series input connection

2. Unmatched Waveform Integrity

• Voltage unevenness <10% under rated load

• Resonant waveform harmonics <5% of fundamental frequency

• Industry-leading distortion: Maintains <3% THD across 10-100% voltage range

3. Robust Overload Capability

• Current: 130% rated current (1.3A) for 2 minutes (no damage)

• Voltage: 110% rated voltage (1650kV/825kV) for 1 minute

• Waveform distortion ≤5% during overvoltage test

• Continuous operation:

• 60 mins at 100% rated parameters

• Unlimited duration at 66.7% rated voltage (1000kV/500kV)

4. Thermal Management

• Winding Temperature Rise: ≤60K (100% load)

• Oil Temperature Rise: ≤55K (100% load)

• Cooling: Efficient ONAN system for stable thermal performance

Safety & Construction

• Grounding: Dedicated shields between LV, measuring, and HV windings

• Surge Protection: Integrated 6kV MOA between exciter windings

• Insulation: Withstands 110% overvoltage without degradation

• Core Design: Cylindrical construction optimized for ultra-high voltage stability

Physical Specifications

• Height: 15,000 mm (15 meters)

• Weight: 70,000 kg

• Compliance: Engineered to meet IEC dielectric test requirements