Product Introduction

       NDY-103B Secondary Voltage Drop Tester, also known as the Transformer Secondary Voltage Drop and CT/PT Secondary Voltage Drop Tester or Wireless Secondary Voltage Drop Tester, is designed for secondary voltage drop measurement tests on voltage transformers and current transformers. It can also be used for electric energy metering, electricity consumption inspection, power inspection, substation maintenance, differential protection testing, and commissioning tests.

Product Features

☆、Distributed wireless synchronous measurement of voltage, current, and phase electrical parameters; wireless synchronous measurement of six channels of voltage amplitude and phase; capable of single-phase or three-phase secondary voltage drop measurement; automatically calculates ratio error and phase angle error.
☆、Can be used alone as a three-phase volt-ampere phase meter.
☆、No GPS required, avoiding long satellite search times due to weather or tall buildings.
☆、No need to lay temporary cables between the energy meter side and the PT terminal, preventing PT secondary short circuits caused by cable insulation or operational issues.
☆、Uses wireless communication, avoiding pollution of the secondary measurement circuit by carrier communication methods, which could affect the accuracy of energy metering.
☆、Capable of both single-phase and three-phase measurements.
☆、Optional wireless repeater available to solve wireless communication issues in basements and well-isolated indoor environments.
☆、Current amplitude and phase measurement as low as 1mA, making it highly suitable for main transformer load tests in substations and current measurements in new or low-load stations.
☆、Automatic range switching.
☆、Fully isolated voltage and current sampling.
☆、Application upgradeable via SD card; measurement data can be exported to SD card.
☆、Equipped with a 3.5-inch color LCD screen.
☆、Built-in high-capacity lithium battery; after a full charge, it can operate continuously for 6 hours with the screen backlight on (backlight-off function extends standby time).
☆、Industrial-grade operating stability range: -20~50℃

Technical Parameters

☆、Test Purpose:
      CT/PT Secondary Voltage Drop Measurement
☆、Power Supply: 185V ～250V, 50Hz/60Hz
      Power: 40VA
☆、Ratio Error
      Measurement Range: 0.001~99.9%
      Measurement Error: X=±（X×1%+Y×1%±0.02%）
      Resolution: 0.001%
☆、Phase Angle Error:
      Measurement Range: 0.001~999.9′
      Measurement Error: X=±（X×1%+Y×1%±0.5′）
      Resolution: 0.01′
☆、Frequency:
      Measurement Range: 45~65Hz
      Measurement Error: ±0.02Hz
      Resolution: 0.01Hz
☆、Phase:
      Measurement Range: 0~360°
      Measurement Error: ±0.1°
      Resolution: 0.1°
☆、Environmental Conditions:
      Operating Temperature: -20℃～+50℃
      Storage Temperature: -20℃～+50℃
      Relative Humidity: 5%～95%, non-condensing
☆、Dimensions: Handheld Terminal ×2: 135mm × 240mm × 55mm
      Outer Packaging Box ×2: 390mm × 290mm × 105mm
☆、Weight: Handheld Terminal ×2: 1kg (excluding accessories)
      Total Weight ×2: 2.5kg (including accessories)