Products

Products

KDB-II Automatic Transformer Turns Ratio, Polarity & Vector Group Tester
KDB-II Automatic Transformer Turns Ratio, Polarity & Vector Group Tester

KDB-II Automatic Transformer Turns Ratio, Polarity & Vector Group Tester

Applications:

  • Factory acceptance and on-site commissioning of distribution and power transformers
  • Preventive maintenance and fault diagnosis of single-phase and three-phase transformers
  • Verification of tap changer integrity and connection correctness
  • Quality assurance in transformer repair workshops and electrical testing labs

  • Response within
    24 hours

  • Free warranty
    12 month

  • On-line training
    Support

Profile:

Engineered for speed, accuracy, and ease of use, the KDB-II delivers complete three-phase ratio and vector group results in under 15 seconds. With a wide measurement range (1–10,000), automatic power cutoff, and data storage capability, it meets the needs of both indoor labs and outdoor field environments—ideal for utilities, contractors, and service teams.

Features:

  • Fully automatic three-phase testing: Simultaneously measures AB, BC, and CA phase ratios, errors, and vector group in one go
  • Wide ratio range: 1 – 10,000
  • High accuracy:
    • ±0.2% ±2 digits (for ratios 1–1,000)
    • ±0.5% ±2 digits (for ratios 1,000–10,000)
  • Vector group identification: Supports all standard groups (I–XII / 1–12)
  • Rapid testing: Full three-phase result in <15 seconds
  • User-friendly interface: Chinese menu with clear prompts; simple one-button operation
  • Smart data management: Auto-saves test results; view historical data anytime
  • On-load transformer support: Enter rated ratio once—no need to reconfigure for different taps
  • Auto power-off: Cuts test voltage immediately after measurement for safety
  • Portable design: Compact size (400 × 290 × 170 mm), lightweight—perfect for field use

Parameter:

Parameter Specification
Turns Ratio Range 1 – 10,000
Measurement Accuracy - 1–1,000: ±0.2% ±2 digits
- 1,000–10,000: ±0.5% ±2 digits
Vector Group Range 1 – 12 (I–XII)
Power Supply AC 220V ±10%, 50 Hz
Operating Temperature 0°C – 40°C
Relative Humidity <80% RH (non-condensing)
Dimensions (W×D×H) 400 mm × 290 mm × 170 mm
Test Mode Single-phase or automatic three-phase
Safety Feature Automatic test power cutoff after measurement