Technical Specifications

Core Parameters

• **Rated Capacity:** 75kVA  
• **Input:** 380V AC ±10% | 194.4A  
• **Output:** 0-650V AC | 115.4A  
• **Frequency:** 60Hz  
• **Waveform Distortion:** ≤3% THD  
• **Impedance Voltage:** ≤7.5% (linear 50-100% range)  
• **Adjustment Method:** DC Servo Motor Drive

Engineering Highlights

1. Precision Control System

• Stepless Voltage Adjustment: DC servo motor enables micrometer-level voltage tuning

• Position Feedback: Optical encoder with terminal/protection contacts

• Linearity: <±0.5% deviation via symmetrical compensation circuit

2. Robust Protection Features

Short-Circuit Withstand: 
  2.5×In for 8 cycles (133ms @ 60Hz) 

Overload Capability:
  1.2×In → 60 min
  1.4×In → 30 min
  1.6×In → 5 min

3. Advanced Circuit Design

• Reversed Polarity Voltage Regulation: Eliminates output waveform distortion

• Symmetrical Compensation: Maintains <1.5% starting voltage deviation

• Interlock System: Integrated safety between regulator, control panel & secondary switches

4. Critical Components

• Magnetic oil level indicator (API 650 compliant)

• ONAN cooling (Oil Natural Air Natural)

• Class H insulation system

• Vibration-dampened core construction

Compliance & Certifications

• **Dielectric Test:** 3.5kV/1min (IEC 60270)  
• **Temperature Rise:** ≤65K @ full load (IEEE C57.12.00)  
• **Standards:** IEC 61010-1, GB/T 10228-2015  
• **Safety:** Reinforced insulation between windings

Industrial Applications

• Semiconductor Manufacturing: Wafer test equipment power conditioning

• Military/Aerospace: MIL-STD-704 power simulation

• Research Labs: High-precision material testing

• Renewable Energy: Inverter durability testing