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150kVA ~ 350kVA Range

LQDZ 250kVA |380V Input | 0-650V Adjustable Output |Manual Contact Voltage Regulator| Industrial Voltage Stabilizer

Technical specifications for LQDZ-250kVA contact regulator: 0-650V output, DC motor control, ONAN cooling, 5-cycle short-circuit protection. Industrial-grade voltage stabilization solution.


  • US$ 16,071.00
  • Lead time: 60 days

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Product Details

Product Tags

LQDZ 250kVA |380V Input | 0-650V Adjustable Output |Manual Contact Voltage Regulator|   Industrial Voltage Stabilizer

Technical Specifications

ParameterSpecification
ModelLQDZ-250kVA
Phase & FrequencySingle Phase, 50Hz
Rated Capacity250kVA
Input Voltage0.38kV
Output Voltage Range0~0.65kV (650V)
Rated Input Current657.9A
Rated Output Current384.6A
Waveform Distortion≤3%
Starting Voltage≤1.5%
Dimensions (L×W×H)1450 × 1050 × 1680 mm
Weight<1200 kg

Advanced Engineering Features

Precision Voltage Control

DC servo motor drive with symmetrical compensation and reversed polarity circuitry ensures linear output from 0-650V (±0.2% accuracy).

Robust Protection Systems

  • 5-cycle short-circuit resistance: Continuous discharge protection without winding damage

  • Triple interlock system: Voltage regulator, control table, and secondary switch integration

Monitoring Systems

  • Magnetic oil surface indicator

  • Position indicator with terminal contacts

  • Programmable regulation speed control

Fig 1: Industrial voltage regulation mechanism with servo control

Performance & Thermal Management

Operational Endurance

  • 100% load: 60 minutes continuous operation

  • 66.7% load: Unlimited operation at 2/3 rated voltage/current

Thermal Specifications

  • Reactor winding: ≤65K temperature rise

  • Oil surface: ≤55K temperature rise

  • External surface: ≤30K temperature rise

Cooling System

ONAN (Oil Natural Air Natural) cooling ensures optimal thermal management in industrial environments.

Industrial Applications

IndustryApplicationPerformance Benefit
Industrial ManufacturingHeavy machinery power supply0-650V range covers diverse equipment needs
Energy SectorSubstation voltage stabilizationWithstands 5-cycle short circuits
Laboratory TestingHigh-voltage equipment validation≤3% waveform distortion for precision
Renewable EnergySolar farm voltage regulationDC motor control adapts to fluctuating inputs

Technical Advantages

  1. Wide voltage range: 0-650V output covers specialized industrial requirements

  2. Compact footprint: 1.45×1.05×1.68m design saves installation space

  3. Low maintenance: Robust construction with <1200kg weight for easy installation

  4. Instant response: ≤1.5% starting voltage enables rapid system initiation

"The reversed polarity voltage circuit eliminates transition dead zones, making the LQDZ series ideal for sensitive industrial processes requiring smooth voltage transitions."– Power Systems Engineering Review

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