Product Introduction

       Excessive comprehensive error in electric energy metering is a common and critical issue in power measurement. Voltage transformers and current transformers are essential components of metering devices, and their operating status and errors directly affect the accuracy of the entire metering system. Transformers have specified operating and load ranges; only within these ranges can they achieve the designed accuracy. To ensure measurement accuracy, it is necessary to conduct secondary circuit load measurements for transformers.

       Secondary Load Tester is an intelligent, fully automated instrument developed by our company by incorporating the advantages of similar domestic and international products for testing voltage transformer secondary loads.
       This instrument features a compact size, light weight, high measurement accuracy, excellent stability, and user-friendly operation. With simple wiring and convenient testing and recording, it significantly improves work efficiency. It uses a large-screen true-color graphical LCD as the display window, with graphical menu operations and Chinese character prompts. The multi-parameter display interface integrates various measurements on one screen, offering a friendly human-machine interaction that is simple and efficient, making it the preferred product for power users at all levels.

Product Features

☆ Automatically completes the measurement of voltage transformer and current transformer on-site secondary loads.
☆ Specially designed software calibration function allows accuracy adjustment without hardware modifications, enabling on-site verification by power test and research departments at all levels.
☆ Simultaneous display of various electrical parameters: voltage, current, phase angle, power factor, active power, reactive power, and apparent power can all be measured; waveform diagrams of each phase parameter can be displayed.
☆ Equipped with harmonic measurement function, capable of measuring harmonic content of voltage and current up to the 32nd order.
☆ Built-in high-capacity rechargeable battery pack allows operation without 220V AC power outdoors; includes a fast automatic charger for quick battery charging.
☆ Battery remaining power percentage indicator function, not just a simple low-power alarm.
☆ Large-screen, high-brightness true-color LCD display, full Chinese graphical menu, and operation prompts for friendly human-machine interaction. Conductive silicone keys make operation easier, and the wide-temperature LCD features automatic contrast and brightness adjustment to adapt to both winter and summer seasons.
☆ Users can print test results at any time via a mini printer.
☆ Test result storage function, capable of storing up to 200 sets of test data.
☆ Equipped with backend management software for uploading stored records to a computer for unified management.

Technical Parameters

☆ Operating Environment

       ⑴ Ambient temperature: -10℃ to 40℃
       ⑵ Relative humidity: ≤80% 
☆ Measurement Accuracy
       The instrument's measurement accuracy is Class 1. 
       Conductance: G=± (1%×G±1%×δ±2 digits) mS
       Susceptance: B=± (1%×δ±1%×G±2 digits) mS
       Load: S=± (1%×S±0.1) VA
       Resistance: R=± (1%×R±1%×X±0.1) Ω
       Reactance: X=± (1%×X±1%×R±0.1) Ω
☆ Charging Power Supply: AC 176V~264V, frequency 45-55Hz
☆ Instrument Measurement Range and Resolution

☆ Insulation: ⑴ Insulation resistance between voltage/current input terminals and chassis ≥100 M?.
                ⑵ Withstand power frequency 2KV (RMS) between power input terminal and chassis for 1 minute.
☆ Battery Operating Time: More than 6 hours of operation after full charge.
☆ Dimensions:
       Main Unit: 32cm×24cm×13cm
       Extension Unit: 32cm×24cm×13cm
☆ Weight: 2.5 Kg