LQHV-5A Transformer DC Winding Resistance Tester

Precision Winding Analysis for Transformers

The LQHV-5A sets new standards in DC resistance testing with advanced four-terminal measurement technology that eliminates lead resistance errors. Ideal for:

• Factory acceptance testing

• Preventive maintenance programs

• Fault diagnosis after short-circuit events

Product Parameters

Technical parameters

Range and accuracy

Advanced Testing Technology

1. Four-Terminal Kelvin Measurement

• Eliminates lead resistance errors

• 0.1μΩ resolution for precise diagnostics

2. Intelligent Current Selection

• Auto-optimizes current for winding size

• Prevents overheating of small windings

3. Complete Protection Systems

• Overvoltage protection circuitry

• Anti-EMI design for substation use

• Automatic discharge after testing

User-Centric Design

1. Intuitive Operation

• 5" color touchscreen with Chinese/English menus

• One-button test initiation

2. Data Management

• 1000-test internal memory

• USB data export (U disk mode)

• Integrated thermal printer

3. Field-Ready Features

• 3-hour continuous operation on battery

• Auto-shutdown after 3 minutes idle

• IP54 protection rating

Typical Applications

• Transformer Manufacturers: Production line testing

• Utility Companies: Periodic maintenance checks

• Repair Workshops: Faulty winding identification

• Installation Teams: Commissioning measurements

Why Choose the LQHV-5A?

• ✅ Laboratory-grade accuracy in field conditions

• ✅ Time savings with auto-test sequences

• ✅ Future-proof with firmware upgrade capability

• ✅ Comprehensive protection for equipment safety