Transformer Capacity Characteristic Tester
China's power system implements a two-part electricity tariff: in addition to the charges measured 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, leading to various fraudulent practices (mainly altering or replacing transformer nameplates) by individuals aiming to pay less and use more electricity; some users evade hundreds of thousands of yuan in electricity fees annually, and power departments lack effective control measures. The Transformer Characteristics-Capacity Comprehensive Tester is a high-precision instrument specially developed and manufactured by this company to address this issue, specifically for measuring transformer capacity and loss parameters.
Usage Features
Transformer Capacity Characteristic Tester comes with a high-efficiency rechargeable battery, allowing operation without an external power supply; a single charge can support continuous measurement of dozens to hundreds of transformers. Additionally, it internally generates a three-phase standard sine wave signal (not a simple inverter AC output, ensuring accuracy of test data under non-rated conditions), and through a power amplifier, it provides a three-phase precision AC test source. When measuring transformer capacity and short-circuit losses, there is no need for external three-phase test power supplies, voltage regulators, current boosters, or other auxiliary equipment, simplifying wiring and greatly improving work efficiency. The capacity test result accuracy reaches 100%. This device is equivalent to two devices: an active transformer capacity tester and a transformer loss parameter tester. It can precisely measure a series of power frequency parameters of various transformers, including capacity, no-load current, no-load loss, short-circuit loss, and impedance voltage. The Transformer Capacity Characteristic Tester has advantages such as small size, light weight, high measurement accuracy, good stability, and easy operation, fully replacing previous multi-meter methods for measuring transformer losses and capacity. It features 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, providing a user-friendly interface that is simple and quick to use, making it the preferred product for power users at all levels.
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. Automatically performs waveform distortion correction, temperature correction, voltage correction, and current correction (for short-circuit tests under non-rated current conditions). The operator only needs to input the correction index based on the transformer type, and the instrument automatically calculates the corrected results, making it very suitable for units that do not have conditions for short-circuit tests on larger capacity transformers.
5. Wide voltage measurement range: voltage can be measured up to 750V without switching gears to ensure accuracy. No damage to the instrument due to incorrect voltage 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 friendly human-machine interaction, touch buttons for easier operation, wide-temperature LCD with brightness adjustment, adaptable to winter and summer seasons.
7. Users can print test data at any time through the micro printer.
8. Test result storage function, can store 200 sets of capacity test data.
Technical Specifications
1. 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, all internal automatic range switching.
2. Accuracy
Voltage, current, frequency: ±0.2%
Power: ±0.5% (CosΦ>0.1), ±1.0% (0.02
4. Charging power supply: AC 160V~260V
5. Insulation: ⑴. Insulation resistance between voltage and current input terminals and the casing ≥100MΩ.
⑵. The working power input terminal withstands a power frequency of 2KV (effective value) for 1 minute test against the casing.
6. Dimensions: 32cm×24cm×13cm
7. Weight: 3Kg
Usage Instructions
Since the instrument has a built-in high-capacity lithium battery, to extend the battery's service life, if the instrument is not used for a long time, it is recommended to discharge it once every two months and then fully charge it.
No display on startup: First turn off the power, check if the fuse is blown, and replace the fuse if necessary.
Sudden black screen: Press the reset button to restart measurement.
Incorrect measurement and calculation results: Check external wiring, whether operating according to the manual, whether there is poor contact or wrong wiring; check if relevant parameter settings are incorrect.
If the no-load test results fluctuate significantly, please note that the test power supply should be separated from the power supply used by large power impact equipment such as workshop cranes.
