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150kVA ~ 350kVA Range

LQDZ 350kVA |400V Input | 0-420V Adjustable Output |Manual Contact Voltage Regulator| Industrial Voltage Stabilizer

Explore the LQDZ-350kVA contact type voltage regulator with 0~0.42kV output, servo motor drive, and short-circuit protection. Ideal for precision industrial voltage stabilization.


  • US$ 21,311.00
  • Lead time: 60 days

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Product Details

Product Tags

LQDZ 350kVA |400V Input | 0-420V Adjustable Output |Manual Contact Voltage Regulator|   Industrial Voltage Stabilizer

Core Specifications

ParameterValue
Rated Capacity350kVA
Input Voltage0.4kV
Output Voltage Range0~0.42kV
Frequency50Hz
Input Current875A
Output Current833.3A
Waveform Aberration≤3%
Starting Voltage≤1.5%

Advanced Operational Features

  • Electrical Drive Adjustment - DC servo motor enables precise voltage tuning with position feedback.

  • Short-Circuit Resilience - Withstands continuous discharge for 5 cycles without winding damage.

  • Symmetrical Compensation Circuit - Ensures linear output voltage stability under load fluctuations.

  • ONAN Cooling - Oil-Natural Air-Natural cooling for 1-hour continuous operation cycles.

LQDZ-350kVA regulator internal circuit with servo drive

Control & Safety Systems

Integrated Monitoring

  • Magnetism oil surface indicator

  • Position indicator with terminal contacts

  • Protection contacts for overload safety

Interlock Mechanism

Synchronized control between voltage regulator, control panel, and secondary switches prevents operational conflicts.

"Reversed polarity voltage regulation enables ±0.1% output stability even at 833A loads."

Industrial Applications

Critical Use Cases

  • Manufacturing Plants - Stabilize voltage for CNC machinery and assembly lines

  • Data Centers - Protect sensitive servers from voltage sags

  • Renewable Energy Stations - Regulate inconsistent solar/wind inputs

  • Laboratory Testing - Precision voltage supply for R&D equipment

Technical Advantages Over Competing Models

FeatureLQDZ-350kVAStandard Regulators
Voltage Linearity±0.2% (Symmetrical Compensation)±1.5%
Short-Circuit Tolerance5 discharge cycles1-2 cycles
Adjustment MechanismServo Motor with Position FeedbackManual Knobs

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