■ Product Overview

The measuring instrument is developed according to the "five connections" of power grid and the "detailed rules for short circuit impedance test". The automatic transformer low-voltage short-circuit impedance tester is equipped with two test power modes: 1 Internal power supply: the three-phase transformer test can be completed without external voltage regulator and one-time wiring. The test is simple and suitable for on-site test. 2. External power supply: apply test power supply through voltage regulator, which is suitable for indoor test.

■ functional features

Display three-phase voltage, three-phase current, three-phase power, three-phase short-circuit impedance (zk), three-phase short-circuit reactance (XK), three-phase short-circuit inductance (LK) and three-phase short-circuit impedance voltage (zke), and automatically calculate the percentage of impedance voltage converted to rated temperature and rated current and the error percentage with nameplate impedance. It can be used to check the single-phase defects of three-phase transformer. The instrument can record the data of three single-phase measurements, and calculate the impedance voltage and percentage error of impedance voltage of transformer according to different connections of transformer. After three single-phase tests, the calculation results of three-phase short-circuit impedance can be displayed. Automatic conversion of test results, including frequency correction, temperature conversion and current conversion, so as to improve the comparability of test data. Vs-6309b has the function of no-load and load test.

■ technical parameters

▲ voltage range: 15V ~ 500V; Measurement error: ± (reading) × 0.2% ± 0.05% (range))

▲ current range: 0.5A ~ 50A; Measurement error: ± (reading) × 0.2% ± 0.05% (range))

▲ power: 0.10 ＜ cos Φ ＜ 1.0；                Measurement error: ± (reading) × 0.5% ± 0.05% (range))

▲ 0.02 ＜ cos Φ ＜ 0.1；                Measurement error: ± (reading) × 1.0% ± 0.05% (range))

▲ frequency (power frequency): 45 ~ 65 (Hz); Frequency error ≤± 0.003hz

▲ short circuit impedance: 0 ~ 99%; Measurement error: ± 0.5%

▲ repeatability stability: ratio difference ＜ 0.2%, angle difference ＜ 0.2 °

▲ instrument display: 5 digits

▲ range expansion: the voltage can be expanded to any required value through the voltage transformer (PT), and other parameters can be automatically adjusted according to the magnification of the transformer.