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Automatic anti-interference precision medium loss measuring instrument is used for field anti-interference dielectric loss measurement, or laboratory precision dielectric loss measurement. The instrument is integrated structure, built-in dielectric loss bridge, frequency conversion power supply, test transformer and standard capacitor. Frequency conversion anti-interference and Fourier transform digital filtering technology are used to measure automatically and intelligently. The measured data are very stable under strong interference. The measurement results are displayed by large screen liquid crystal and can be printed out with a micro printer.
Variable frequency anti-interference
Internal HV: 3pF～60000pF/12kV 60pF～1μF/0.5Kv
External HV: 3pF～1.5μF/10kV 60pF～30μF/0.5kV
Resolution: Maximum 0.001pF, 4 valid figures.
tgδ range(Tan delta range)
Unlimited, 0.001% resolution, automatic identification for capacitance, inductance and resistance of three tested articles.
Test current range
Set voltage range: 0.5～12kV
Maximum output current: 200mA
Buck-bust method: continuous stepless regulation
Test frequency: integer frequency of 45~65Hz
49/51Hz,45/55Hz automatic dual variable frequency
Frequency accuracy: ±0.01Hz
External High Voltage
the maximum test current is 5A / 40~70Hz in the forward connection
The maximum test current during reverse wiring is 10kV / 5A / 40~70Hz
CVT self-exciting low voltage output
Output voltage 3～50V,
output current 3～30A
About 30s, depending on measuring method
Input power supply
Standard RS232 interface
mini-type thermal printer
|On-site transformer housing is generally grounded. When testing the tgδ(dielectric loss) of transformer, the reverse connection method is generally selected. Only for fully insulated transformer, the forward connection method is used to test.