NDBC-S Transformer Turns Ratio and Vector Group Tester

Product Introduction

       Transformer ratio bridge measurement involves cumbersome operation and a narrow measurement range, which no longer meets the requirements of fast-paced and high-efficiency modern measurement. It is small in size, light in weight, high in accuracy, and excellent in stability. It features a large-screen Chinese character display, menu operation, and a user-friendly interface. The transformation ratio and group can be measured at once. This instrument is an ideal testing device for the power industry.

Product Features

☆、True three-phase testing: Single-phase power input, internally digitally synthesized three-phase standard sine wave signal source, through a high-fidelity power amplifier, generates a three-phase test power supply (distortion less than 0.1%, symmetry better than 0.05%) output. Test results have better equivalence, avoiding misjudgment of groups and other phenomena.

☆、Powerful functionality: Capable of both single-phase measurement and automatic testing of three-phase windings. Both single-phase and three-phase can measure polarity and phase angle, completing parameters such as transformation ratio, phase angle value, error, tap position, and tap value for AB, BC, and CA phases at once, with automatic group number recognition.

☆、Phase angle measurement function: Accurately measures the phase angle between high and low voltage sides, enabling transformation ratio and angle measurement for non-integer transformers.

☆、Hexagon diagram display function: Test results are displayed numerically and with a hexagon vector diagram, intuitively showing the transformer connection group.

☆、Blind test function: No need to select wiring method or connection group. Measuring Y/△, △/Y transformers requires no external short circuit; the wiring method automatically switches based on the selected test content. Fully capable of measuring transformation ratio and group number for transformers without nameplates.

☆、Tap testing: Quickly measures the transformation ratio and ratio error at various tap switch positions. The rated ratio only needs to be input once to calculate the ratio error at each tap position without repeated input.

☆、Simultaneously features both turns ratio measurement and operating voltage ratio measurement. Operating ratio more accurately reflects the actual voltage ratio of the transformer under real operating conditions.

☆、Good vibration resistance: The use of connectors enhances vibration resistance.

☆、Equipped with a 5.6-inch high-definition true-color LCD screen, displaying data and vector diagrams intuitively and delicately.

☆、The test source used in this instrument is a digitally synthesized standard sine digital source, with distortion less than 0.1%, unaffected by the quality of the working power supply.

☆、Portable: Small size, light weight.
☆、Internally equipped with a high-capacity lithium-ion rechargeable battery, allowing testing on-site without any power supply. A full charge enables over 800 consecutive measurements.

Technical Parameters

☆、Transformation ratio measurement range: 0.8~10000.
☆、Fast measurement speed: Completes three-phase testing within 1 minute.
☆、Measurement accuracy: High-voltage side voltage measurement accuracy 0.05%
      Low-voltage side voltage measurement accuracy 0.1%
      Phase angle measurement accuracy: 0.1°
      Transformation ratio measurement accuracy  0.1%（0.8－3000）
      0.2%（3000－10000）
☆、Portable, suitable for field operations.
☆、Weight: 3Kg