Transformer Capacity Characteristic Tester
China's power system implements a two-part electricity tariff: in addition to the charges metered by the metering device, 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 evade 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 specifically developed and designed by the company to address this issue, used for measuring transformer capacity and loss parameters.
Features
Transformer Capacity Characteristic Tester comes with a high-efficiency rechargeable battery, allowing operation without external power supply. A single charge can support continuous measurement of dozens to hundreds of transformers; simultaneously, the internal digital synthesis of three-phase standard sine wave signals (not a simple inverter AC output, ensuring 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 losses, no external three-phase test power supply or auxiliary equipment such as voltage regulators and current boosters is needed, simplifying wiring and greatly improving work efficiency; the capacity test result accuracy reaches 100%. It serves as two devices in one: an active transformer capacity tester + a transformer loss parameter tester. It can precisely measure a series of power frequency parameters for 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, completely replacing the previous multi-meter method for measuring transformer losses and capacity. With simple wiring and convenient testing and recording, it greatly improves work efficiency. The Transformer Capacity Characteristic Tester features a large-screen graphical LCD as the display window, graphical menu operation with Chinese prompts, and a multi-parameter display interface, offering a user-friendly interface that is simple and quick to use, making it the preferred product for power users at all levels.
Characteristics
1. Can accurately measure the capacity of various distribution transformers, 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 (short-circuit test 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 lack conditions for short-circuit tests on larger capacity transformers.
5. Wide voltage range: voltage measurement up to 750V without switching gears, ensuring accuracy. No damage to the instrument due to incorrect gear selection.
6. Battery remaining capacity percentage indication, not just a simple low battery alarm.
6. Large screen, high-brightness LCD display, full Chinese menu and operation prompts for user-friendly interaction, touch buttons for easier operation, wide-temperature LCD with brightness adjustment, adaptable to winter and summer seasons.
7. Users can print test results at any time via 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
Instructions
Since the instrument has a built-in high-capacity lithium battery, to extend its 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: 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, if there is poor contact or wrong wiring; incorrect parameter settings.
If the no-load test results fluctuate significantly, note that the test power supply should be separated from the power supply used by large power impact equipment such as workshop cranes.
