■ functional features of automatic anti-interference precision dielectric loss tester

▲ full three-phase sinusoidal inverter output, automatic output voltage regulation, soft start and soft stop functions, so the test speed is fast and the precision is high.

▲ transformation ratio, group and polarity test functions of three-phase transformer, single-phase transformer, Pt and Z-type transformer.

▲ it has the function of blind test, that is, the transformation ratio and group test are carried out when the connection mode of high and low voltage is not known.

▲ CT transformation ratio polarity test function, with angle difference test function in single-phase test.

▲ tap gear can be tested up to 197; Wide test range, up to 10000.

▲ output short circuit protection function.

■ functional features

▲ the instrument adopts complex current method to measure capacitance, dielectric loss and other parameters. The test results have high precision and are easy to realize automatic measurement.

▲ the instrument adopts frequency conversion technology to eliminate 50Hz power frequency interference on site, and can measure reliable data even in the environment of strong electromagnetic interference.

▲ the instrument is easy to operate, and the measurement process is controlled by the microprocessor. As long as the appropriate measurement method is selected, the data measurement can be completed automatically under the control of the microprocessor.

▲ CVT test function is set to realize the self excitation test of CVT. There is no need for external accessories. Only one measurement is needed, and the capacitance and dielectric loss of C1 and C2 are measured.

▲ it has the function of reverse wiring low-voltage shielding. When the 220kV CVT bus is grounded, the dielectric loss of 10kV reverse wiring can be measured for C11 without disconnection.

▲ it has the function of measuring high-voltage dielectric loss, and can use high-voltage transformer or series resonance to conduct dielectric loss test with voltage exceeding 10kV.

■ technical parameters

▲ anti interference index: frequency conversion anti-interference can still achieve the above accuracy under 200% interference

▲ capacitance range:

● internally applied high voltage: 3pf ~ 60000pf / 10kV 60pf ~ 1 μ F/0.5kV

● externally applied high voltage: 3pf ~ 1.5 μ F/10kV 60pF ～ 30 μ F/0.5kV

● resolution: up to 0.001pf, 4 significant digits

▲ tg δ Range: unlimited, resolution 0.001%, automatic identification of capacitance, inductance and resistance

▲ accuracy: Cx: ± (reading) × 1%+1pF） ； tg δ: ± (reading) × 1%+0.00040）

▲ test current range: 10 μ A ～ 1A

▲ internally applied high pressure:

● set voltage range: 0.5 ~ 10kV; Output current: 200mA

● test frequency:

45, 50, 55, 60, 65Hz single frequency

45 / 55Hz, 55 / 65Hz, 47.5 / 52.5hz automatic double frequency conversion

● frequency accuracy: ± 0.01Hz

▲ externally applied high voltage:

● when positive wiring, the test current is 1a, power frequency or frequency conversion is 40-70HZ

● during reverse wiring, the test current is 10kV / 1a, power frequency or frequency conversion is 40-70HZ

▲ CVT self excitation low voltage output: output voltage 3 ~ 50V, output current 3 ~ 30A

▲ CVT transformation ratio measurement:

● measurement accuracy of transformation ratio: ± (reading) × 1%)

● measurement range of transformation ratio: 10 ~ 99999

● phase measurement accuracy: ± 0.1 °

● phase measurement range: 0 ～ 359.9 °

■ technical parameters

▲ range: 0.9 ~ 10000

▲ accuracy: ± (reading) × 0.1% + 2 words) (≤ 1000) ± (reading) × 0.2% + 2 words) (> 1000, ≤ 3000) ± (reading) × 0.3% + 2 words) (> 3000)

▲ resolution: 0.9 ~ 9.9999 (0.0001) 100 ~ 999.99 (0.01) 10000 and above (1) 10 ~ 99.999 (0.001) 1000 ~ 9999.9 (0.1)

▲ working power supply: AC220V ± 10%, 50Hz

▲ instrument weight: 3.5kg

▲ instrument volume: 260mm × 200mm × 160mm

▲ service temperature: - 10 ℃ ~ 50 ℃

▲ relative humidity: ＜ 90% RH, no condensation