Product Overview

The LQDZ 25kVA Contact-Type Voltage Regulator delivers precision AC voltage adjustment (0–420V) for industrial applications. Utilizing a motor-driven contact mechanism and symmetrical compensation technology, it ensures linear output, stable voltage regulation, and compatibility with sensitive equipment.

Key Specifications

Technical Features

1. Precision Voltage Control

• Symmetrical compensation circuitry ensures linear output (0–420V) with minimal waveform distortion (<3% THD).

• Motor-driven adjustment (DC servo) enables stable, programmable regulation speed.

2. Robust Protection & Safety

• Withstands 5 cycles of short-circuit current without regulator winding damage.

• Integrated protection contacts, position indicators, and interlock systems (compatible with control panels/switches).

3. Thermal Performance

• Winding rise: ≤65 K

• Oil surface rise: ≤55 K

• External surface rise: ≤30 K

• Continuous operation at 67% load (267V, 40A).

• Temperature limits:

4. Monitoring & Control

• Magnetic oil-level indicator

• Position indicator with terminal contacts

• Remote operation support

Applications

• Laboratory testing equipment

• Precision manufacturing machinery

• Voltage-sensitive industrial loads

• Compliance testing (IEC/ANSI standards)

Compliance & Notes

• Waveform purity (<3% THD) meets IEEE/ANSI C57 standards for sensitive instrumentation.

• ONAN cooling uses mineral oil (standard) or synthetic ester (optional).

• Includes terminal lugs for CT/PT integration.

✅ Why Choose This Regulator?
Engineered for zero-interruption voltage control in critical environments. Combines motor-driven accuracy with reinforced short-circuit resilience — ideal for semiconductor, R&D, and high-precision industrial applications.