Transformer DC resistance tester

Transformer DC resistance testerThe introduction of angle in line voltage acquisition, rather than the traditional multiplication of fixed coefficients, can truly reflect the true voltage of transformer samples. At the same time, the instrument measurement introduces necessary corrections (such as voltage correction, current correction, temperature correction, frequency correction). Thus, its performance *, function *, small size, light weight, simple and convenient operation, accurate and reliable data can replace traditional instrument testing methods, 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 use of this instrument can greatly improve work efficiency and reduce labor intensity.

Transformer DC resistance testerMain technical indicators
1. Basic measurement accuracy: Voltage and current at level 0.5
Power (0.1 ≤ cos π≤ 1) 1.0 level
2. Voltage measurement range: AC 50V~500V (phase voltage)
3. Current measurement range: AC 1A~50A
4. Working temperature: -10 ℃~50 ℃
5. Environmental humidity: 10% to 85%
6. Storage temperature: -20 ℃~50 ℃
7. Working voltage: AC 220V ± 20%

Main functions and features
1. 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 distribution transformer core.
2. Measurement of load loss:
Display three-phase voltage, three-phase current, and three-phase power, automatically calculate the impedance voltage percentage of the transformer, convert it to the load loss at rated temperature and rated current, and automatically determine the coil model of the distribution transformer.
3. Measurement of single-phase in three-phase transformers:
Can be used to inspect single-phase defects in transformers or for situations where there is no three-phase power on site. The instrument can record data from three single-phase measurements and calculate the no-load current, no-load loss, impedance voltage, and load loss of the transformer based on its different connections.
4. Measurement of zero sequence impedance:
The measurement of zero sequence impedance is applicable to transformers with neutral points in star shaped connections on the high voltage side. The instrument can record zero sequence impedance, zero sequence reactance, zero sequence inductance, impedance angle, and zero sequence resistance.
5. Consumption query function:
The instrument contains the percentage of no-load current, no-load loss, impedance voltage, and load loss of 30KVA-2500KVA amorphous alloy (SH15), S11, S9, S7 specified by the national standard, which can be queried according to the type and capacity of the transformer.
6. Within the allowed measurement range of the instrument, direct measurement is possible. If it exceeds the measurement range, external voltage and current transformers can be connected. The instrument can set the transformation ratio of the external voltage and current transformers and directly display the values of the applied voltage and current.
7. The instrument has a large screen LCD display that 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. The instrument adopts a Chinese menu, Chinese prompts, and simple operation.
8. Built in memory, not lost in case of power failure, the instrument can store 400 sets of data.
9. The instrument comes with a printer that can print test data and also print memory browsing data.
10. Calendar and clock functions, capable of time calibration.