This tester is an instrument used for measuring the capacity of distribution power transformers, measuring transformer no-load and short-circuit losses, and has harmonic analysis function, which facilitates the analysis of on-site power grid quality. The circuit design of the instrument is exquisite and the idea is unique. The instrument adopts six synchronous AC sampling and digital signal processing technologies internally, successfully solving the problems of low power factor measurement and synchronous measurement and calculation of multiple signals under mains conditions. At the same time, the instrument measurement introduces calibration (such as voltage calibration, current calibration, temperature calibration, frequency calibration), making it superior in performance, powerful in function, small in size, light in weight, easy to operate, accurate and reliable in data, and can completely replace traditional instrument testing methods. It can display and record all measurement data that users are concerned about, and can be used as a high-precision communication indicator instrument on site. The instrument is powered by a large capacity lithium battery to ensure an extended usage time, greatly improving work efficiency and reducing labor intensity.

▶ Capacity measurement: The instrument is equipped with a rechargeable lithium battery and can output a three-phase sine wave inverter power supply. The output voltage is automatically adjusted and has soft start and soft stop functions. It does not require any external power supply to measure the capacity and determine the model of the distribution transformer. At the same time, it displays the impedance voltage of the transformer and the load loss converted to rated temperature and rated current.

▶ Measurement of load loss: displays three-phase voltage, three-phase current, and three-phase power, automatically calculates the impedance voltage percentage of the transformer, converts it to the load loss at rated temperature and rated current, automatically determines the iron core model of oil immersed or dry-type distribution transformers, and has an alarm adaptive prompt function during the testing process, which is convenient for on-site users to use.

▶ Measurement of no-load loss: The instrument displays three-phase voltage, three-phase current, and three-phase power. The instrument displays the distortion rate of the applied power waveform, automatically calculates the no-load loss of the transformer converted to rated voltage and corrected for waveform distortion, and displays the model of the iron core of the oil immersed or dry-type distribution transformer.

▶ The instrument adopts a large screen LCD display, which can display three-phase voltage, three-phase current, three-phase power, three-phase average voltage, average current, three-phase total power and related data on the same screen. Display a Chinese menu with Chinese prompts and simple operation.

▶ Dual use of AC and DC: lithium battery power supply or 220V AC charger power supply adaptive.

▶ Non power-off clock and date display; The data storage methods are divided into local storage and USB storage. Local storage can store 200 pieces of test data, and local storage can be converted to USB storage; The USB flash drive stores data in Word format, which can be directly edited and printed on a computer.

▶ Thermal printer printing function, fast and silent.

▶ Basic measurement accuracy: Voltage, current ± (reading x 0.2%+2 words)

Power (0.2 ≤ cos π≤ 1) ± (reading x 1.0%+2 words)

Capacity ± (reading x 10%+2 words)

▶ Capacity measurement range: 30kVA to 65000kVA

▶ Voltage measurement range: AC 50V~850V

▶ Current measurement range: AC 0.5A~100A

▶ Working temperature: -10 ℃ to 40 ℃

▶ Environmental humidity: 10% to 85%

▶ Storage temperature: -20 ℃ to 50 ℃

▶ Dimensions: 320mm × 270mm × 145mm

▶ Weight: 5kg (excluding test line)