Advanced Voltage Regulation for Critical Applications

The LQDZ-80kVA contact-type voltage regulator delivers precision voltage control from 0-420V with ±1.5% starting voltage accuracy. Engineered for industrial environments requiring stable power supply, this single-phase solution features motor-driven adjustment and symmetrical compensation technology that maintains linear output characteristics under fluctuating loads.

Technical Specifications

Core Technology Highlights

Precision Drive System

Single-phase DC servo motor enables smooth voltage adjustment with programmable regulation speed. Integrated position indicator with terminal contacts ensures accurate tap positioning.

Symmetrical Compensation Circuit

Proprietary reversed polarity voltage regulation maintains linear output characteristics, eliminating waveform distortion even at 100% load cycles.

Robust Protection System

• Magnetic oil level indicator with auto-shutdown

• Multi-stage protection contacts

• Interlock system with control table/secondary switch

• Over-temperature cutoff (65K winding limit)

Thermal Performance Data

Verified under continuous full-load operation (IEC 60076-7):

• Winding temperature rise: ≤65K (100% U_H/I_H for 60min)

• Oil temperature rise: ≤55K at surface

• External surface rise: ≤30K ambient

ONAN cooling system ensures thermal stability in ambient temperatures up to 40°C.

Safety & Compliance Features

Fault Protection

Withstands 5-cycle short-circuit discharges without regulator winding damage, exceeding IEC 61000-4-11 surge requirements.

Industrial Safety

• IP54 enclosure rating (dust/water resistant)

• Double-insulated bushings

• Ground fault monitoring contacts

• Dielectric strength: 3kV RMS (50Hz/1min)

Typical Applications

• High-current laboratory test benches

• Semiconductor manufacturing equipment

• Industrial motor calibration systems

• Power transformer testing facilities

• Critical process voltage stabilization