Product Introduction

       NDRTL-Ⅲ Transformer Characteristics and Capacity Tester is a high-precision instrument specifically developed by our company for measuring transformer capacity and loss parameters. It features a built-in high-performance rechargeable battery, allowing operation without an external power supply. A single charge supports continuous testing of up to 500 units. Additionally, it generates an internal digitally synthesized three-phase standard sine wave signal (not merely inverted AC output, ensuring accurate test data under non-rated conditions). Through a power amplifier, it provides a three-phase precision AC test source. When measuring transformer capacity and short-circuit loss, it eliminates the need for external three-phase test power sources, voltage regulators, current boosters, and other auxiliary equipment, simplifying wiring and significantly improving work efficiency.

       It delivers highly accurate capacity test results. This single device integrates the functionality of four instruments: Active Transformer Capacity Tester + Transformer Loss Parameter Tester + Harmonic Analyzer + Oscilloscope. It can precisely measure a series of power frequency parameters such as capacity, no-load current, no-load loss, short-circuit loss, and impedance voltage for various transformers. It also measures voltage and current distortion and harmonic content during no-load and load tests, and supports vector analysis.

       The instrument offers advantages such as compact size, light weight, high measurement accuracy, excellent stability, and user-friendly operation. It fully replaces traditional multi-meter methods for measuring transformer loss and capacity, with simple wiring and convenient testing and recording, greatly enhancing work efficiency. It features a large color LCD display, menu-driven operation with Chinese prompts, and a multi-parameter display interface. The user-friendly interface ensures ease of use, making it the preferred choice for power users at all levels.

Product Features

☆ Accurately measures the capacity of various distribution transformers with passive measurement, offering convenience and precision.

☆ Built-in power supply, automatically generates three-phase high-power test source.

☆ Measures no-load current, no-load loss, short-circuit voltage, and short-circuit loss for various types of transformers.

☆ Automatically performs waveform distortion correction, temperature correction (providing simple temperature correction and additional loss correction), voltage correction (no-load test under non-rated voltage), and current correction (short-circuit test under non-rated current conditions). Ideal for facilities lacking conditions for short-circuit tests on larger capacity transformers.

☆ Measures harmonic content and total harmonic distortion of voltage and current.

☆ Conducts simple vector analysis and draws vector diagrams.

☆ Displays waveform diagrams of various electrical parameters, functioning as an oscilloscope.

☆ Wide voltage measurement range: up to 750V without range switching, ensuring accuracy. Prevents instrument damage due to incorrect voltage range selection.

☆ Capacity measurement range: 20KVA to 100000KVA.

☆ Battery remaining power percentage indicator, not just a simple low-power alarm.

☆ Large, high-brightness color LCD display, full Chinese menu and operation prompts for user-friendly interaction. Conductive silicone touch keys ensure easier operation and longer key life.

☆ Users can print test results at any time via a mini printer.

☆ Test result storage function, capable of storing 200 sets of capacity test data.

Technical Parameters

☆ Input Characteristics

Active Part:

Voltage measurement range: 0～10V

Current measurement range: 0～10A

Passive Part:

Voltage measurement range: 0～750V wide range.

Current measurement range: 0～100A, fully automatic internal range switching.

☆ Accuracy

Voltage: ±0.5%

Current: ±0.5%

Power: ±0.5%（CosΦ>0.2），±1.0%（0.02

☆ Operating temperature: －10℃ ～ +40℃

☆ Charging power supply: AC 160V～260V

☆ Insulation: Insulation resistance between voltage/current input terminals and chassis ≥100M?.

Withstands 2KV (RMS) power frequency voltage between the working power input terminal and chassis for 1 minute.

☆ Host dimensions: 320mm × 240mm × 13mm

☆ Weight: 3Kg