Technical Specifications

• **Rated Capacity:** 66kVA (70kVA peak)  
• **Input:** 380V AC ±10% | 50Hz  
• **Output:** 0-420V AC stepless adjustment  
• **Waveform Distortion:** ≤3% THD  
• **Linearity Error:** ≤1.5% (starting voltage)  
• **Impedance Voltage:** ≤7.5% (linear 50-100% range)  
• **Cooling System:** ONAN (Oil Natural Air Natural)  
• **Duty Cycle:** 60 minutes continuous

Engineering Features

1. Precision Control System

• DC Servo Motor Drive: Micrometer-level voltage tuning

• Position Feedback: Optical encoder with terminal/protection contacts

• Symmetrical Compensation: Maintains output linearity (<±0.8% deviation)

• Reversed Polarity Circuit: Eliminates waveform distortion

2. Protection & Safety

• Magnetic Oil Level Indicator (API 650)  
• Triple Interlock System:  
  - Regulator ↔ Control Table  
  - Regulator ↔ Secondary Switches  
  - Over-travel protection contacts  
• Class H Insulation (180°C rating)

3. Mechanical Construction

Dimensions: 1300(L) × 780(W) × 1850(H) mm  
Shipping Weight: 570 kg  
Core Construction: Grain-oriented silicon steel  
Terminals: 120×10mm copper busbars  
Enclosure: IP23 (indoor/outdoor)

Performance Data

Industrial Applications

• Power Electronics Testing: IGBT/thyristor burn-in

• Laboratory Use: Calibration power sources

• Manufacturing: Precision welding equipment

• Research: Material dielectric testing