Product Overview

The LQDZ-750KVA contact-type voltage regulator delivers precision voltage control for high-power testing environments. Engineered with motor-driven operation and ONAN cooling, this single-phase regulator meets rigorous industrial standards for waveform stability (±3%) and short-circuit resilience.

Core Specifications

Key Performance Features

Motor-Driven Regulation

Electrical drive system enables precise voltage adjustment with starting voltage ≤1.5% of rated value

Robust Short-Circuit Protection

Withstands 2× rated current for 8 cycles without winding damage or mechanical distortion

Thermal Management

ONAN cooling maintains safe operating temperatures: ≤65K winding rise, ≤55K oil surface rise

Structural Design

• Integrated voltage raising/regulating units

• Position limit switches

• Oil level indicator & drain valve

Operational Parameters

• Frequency: 50Hz ±2%

• Duty Cycle: 30 min continuous operation at 100% load

• Cooling Method: Oil Natural Air Natural (ONAN)

• Impedance Linearity: Maintained between 50-100% load range

Industrial Applications

High-Voltage Testing Laboratories

Ideal for dielectric strength tests on transformers, cables, and switchgear per IEC 60298 standards

Power Equipment Manufacturing

Provides stable voltage for quality verification of insulators, bushings, and protective devices

Research & Development

Enables precision voltage ramping for material breakdown testing and insulation research

Safety Compliance

Designed in accordance with:

• IEC 61010-1 (Electrical Safety)

• IEC 60076 (Power Transformers)

• ISO 9001 (Quality Management)

Note: All units include overcurrent protection and thermal cutoffs