Electrical Characteristics

Performance Metrics

Dielectric Strength

• Partial Discharge: <20pC at 100kV

• Overvoltage: 110kV for 60s

• Waveform Distortion: ≤1% THD

Thermal Limits

• Winding ΔT: ≤65K (IEC 60076-2)

• Oil ΔT: ≤55K (25# mineral oil)

• Duty Cycle: 1h ON/1h OFF (8 cycles/day)

Mechanical Design

Core Components

• Adjustment Mechanism: Motorized air gap control with 1Ni18Cr9Ti guide rails

• Noise Control: Double lead screw system (≤65dB at 1m)

• Cooling: ONAN (Oil Natural Air Natural)

Enclosure Specifications

• Pressure Test: 20kPa leak-proof (GB/T 7354)

• Seals: Aviation acrylate (MIL-R-25988)

• Coating: Sky blue epoxy (ISO 12944 C4)

Testing Capabilities

Compatible Test Objects

• Power cable withstand testing (up to 35kV class)

• GIS busbar partial discharge detection

• Transformer turn-to-turn insulation verification

Protection Systems

• Automatic over-current trip at 110% I_H

• Real-time PD monitoring interface

• Air gap position interlock

Technical Highlights

Precision Engineering

• Linearity: ±1% reactance error (10-100% range)

• Q Factor: ≥10 at rated frequency

• Eddy Current Loss: <0.5% via stainless steel construction

Reliability Features

• Thermal expansion compensation design

• Magnetic field-optimized pedestal

• Epoxy-glass reinforced winding tubes