Precision Power Control for Critical Applications

The LQDZ-150kVA contact-type voltage regulator delivers laboratory-grade voltage adjustment (0-3,300V) for high-voltage testing, transformer validation, and industrial power simulation. Engineered for 50Hz single-phase systems, it combines ≤3% waveform distortion with exceptional short-circuit resilience – sustaining 5× overload currents without winding damage. With servo-motor control and comprehensive protection systems, it ensures operational safety in ISO 17025-certified labs and harsh industrial environments.

Technical Specifications

Core Technologies

1. Contact-Type Regulation

• Carbon brush contacts for stepless voltage adjustment

• Zero voltage interruption during transitions

• Reduced arcing vs. tap-changing systems

2. Servo Motor Drive System

• Precision position feedback (0.1% resolution)

• Terminal limit switches for over-travel protection

• Programmable adjustment speed (1-5 V/s)

3. Short-Circuit Resilience

• Withstands 5× rated current (227A) for 100ms

• Reinforced winding insulation (Class H)

• Mechanical stability under fault conditions

Safety & Monitoring Systems

Safety Note: Exceeding 65K winding temperature rise voids warranty.

Operational Guidelines

Duty Cycle Management

• Standard Operation: 60 mins at 100% load (45.45A @ 3.3kV)

• Cooling Required: 30 mins idle after full-load cycle

Startup Protocol

1. Verify oil level in sight glass (min 80% fill)

2. Engage limit switches before energizing

3. Ramp voltage from 0V at ≤500V/s

Industry Applications

High-Potential Testing

Dielectric strength validation per IEC 60270

Cable & Transformer MFG

Partial discharge testing at 2.5-3.3kV

Power System Simulation

Voltage sag/swell testing (IEC 61000-4-11)

Compliance & Standards

• IEC 60076-11 (Dry-type transformers)

• IEEE C57.12.01 (General requirements)

• EN 50588-1 (Medium power transformers)

• ISO 9001:2015 (Manufacturing quality)

Maintenance Schedule