The GS213 Transformer Capacity Characteristic Tester can accurately measure the capacity of various distribution transformers with passive measurement. It can also measure no-load current, no-load loss, short-circuit voltage, short-circuit loss, and zero-sequence impedance of various types of transformers. It can automatically perform waveform distortion correction, temperature correction, voltage correction (no-load test under non-rated voltage), and current correction (short-circuit test under non-rated current). The operator only needs to input the correction index according to the transformer type, and the instrument will automatically calculate the corrected results. It allows external voltage and current transformers to expand the measurement range, and can measure test objects with any parameters.

Introduction

The Transformer Capacity Characteristic Tester can accurately measure the capacity of various distribution transformers with passive measurement. It can also measure no-load current, no-load loss, short-circuit voltage, short-circuit loss, and zero-sequence impedance of various types of transformers. It can automatically perform waveform distortion correction, temperature correction, voltage correction (no-load test under non-rated voltage), and current correction (short-circuit test under non-rated current). The operator only needs to input the correction index according to the transformer type, and the instrument will automatically calculate the corrected results. It allows external voltage and current transformers to expand the measurement range, and can measure test objects with any parameters.



The Transformer Capacity Characteristic Tester is an instrument specially designed for testing the capacity of standard distribution power transformers under low voltage and low current conditions. The built-in test power supply can complete capacity tests for 100 units of 2500KVA distribution transformers on a single charge. It adopts advanced A/D synchronous AC sampling technology and digital signal processing technology, with exquisite circuit design, unique ideas, superior performance, powerful functions, small size, light weight, and integrated design, making it easy to carry and suitable for field operations. It can fully meet the requirements for on-site distribution power transformer capacity testing. It features Chinese character display and prints the measurement data that users care about.



2 Design Purpose

China's power system implements a two-part tariff: in addition to the fees charged by metering devices, a basic electricity fee is also charged based on transformer capacity; for larger users, a one-time capacity increase fee is required when putting transformers into operation. With the development of the power industry and the increase in electricity consumption, self-owned transformers and privately contracted transformers have gradually occupied a considerable share of distribution transformers. Consequently, individuals have resorted to various fraudulent means (mainly altering or replacing transformer nameplates) to reduce fees and increase electricity usage; some users steal electricity fees amounting to hundreds of thousands of yuan annually, and the power sector lacks effective control measures. The Transformer Characteristic-Capacity Comprehensive Tester is a high-precision instrument specially developed and researched by the company to address this problem, specifically for measuring transformer capacity and loss parameters.



3 Usage Features

The Transformer Capacity Characteristic Tester comes with a high-efficiency rechargeable battery, allowing it to work without an external power supply. A single charge can support continuous measurements of dozens to hundreds of units; meanwhile, the internal digital synthesis of three-phase standard sine wave signals (not a simple inverter AC output, ensuring the accuracy of test data under non-rated conditions) provides a three-phase precision AC test source through a power amplifier; when measuring transformer capacity and short-circuit loss, there is no need for external three-phase test power supplies, voltage regulators, or current boosters, simplifying wiring and greatly improving work efficiency; the capacity test accuracy rate reaches 100%. It is equivalent to two devices in one: an active transformer capacity tester + a transformer loss parameter tester. 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 of various transformers. The Transformer Capacity Characteristic Tester has the advantages of small size, light weight, high measurement accuracy, good stability, and easy operation, and can completely replace the previous multi-meter method for measuring transformer loss and capacity. It has simple wiring, convenient testing and recording, and greatly improves work efficiency. The Transformer Capacity Characteristic Tester uses a large-screen graphical LCD as the display window, with graphical menu operation and Chinese prompts, integrating multiple parameters on one screen. The human-machine interface is friendly, easy and quick to use, making it the preferred product for power users at all levels.



4 Features

1. Can accurately measure the capacity of various distribution transformers with passive measurement, convenient and accurate.



2. Built-in power supply automatically generates a three-phase high-power test power source.



3. Can measure no-load current, no-load loss, short-circuit voltage, and short-circuit loss of various types of transformers.



4. Can automatically perform waveform distortion correction, temperature correction, voltage correction, and current correction (short-circuit test under non-rated current). The operator only needs to input the correction index according to the transformer type, and the instrument will automatically calculate the corrected results, making it very suitable for units that do not have conditions for short-circuit tests on slightly larger capacity transformers.



5. Wide voltage range: the maximum measurable voltage is 750V, and accuracy is guaranteed without switching gears. It will not damage the instrument due to incorrect gear selection.



6. Battery remaining capacity percentage indication function, not just a simple low battery alarm.



6. Large-screen, high-brightness LCD display, full Chinese menu and operation prompts for a friendly human-machine dialogue, touch buttons for easier operation, and wide-temperature LCD with brightness adjustment to adapt to various seasons.



7. Users can print out test data at any time through the micro printer.



8. Test result storage function, can store 200 sets of capacity test data.