Variable Frequency Dielectric Loss Tester is used for on-site anti-interference dielectric loss measurement, or precision dielectric loss measurement in laboratories. The instrument has an integrated structure, built-in dielectric loss bridge, variable frequency power supply, test transformer, and standard capacitor, etc. It adopts variable frequency anti-interference and Fourier transform digital filtering technology, fully automatic intelligent measurement, and the measurement data is very stable under strong interference. The measurement results are displayed on a large screen LCD, and the built-in micro printer can print output.
Product Features:
◆ It has multiple working modes: positive/reverse wiring, internal/external standard capacitor, internal/external high voltage, integrated structure, can do various conventional dielectric loss tests, no need to connect any auxiliary equipment externally.
◆ LCD display, menu operation, rich test data, automatically distinguish capacitance, inductance, resistance type test objects, built-in micro printer can print output.
◆ It has an external standard capacitor interface, can connect an external oil cup for precision insulating oil dielectric loss test, can connect external solid material measuring electrodes for precision insulating material dielectric loss test, and can also connect an external high-voltage standard capacitor for high-voltage dielectric loss test.
◆ Automatically recognizes 50Hz / 60Hz system power supply, and supports generator power supply, even if the frequency fluctuates greatly, it can measure normally.
◆ Built-in series and parallel two dielectric loss measurement models, convenient for instrument calibration.
◆ Can store 255 sets of measurement data.
◆ When measuring with CVT self-excitation method, C1/C2 can be measured at one time with one wiring, automatically compensate the influence of busbar grounding and standard capacitor voltage division, no need to change wires or connect any external accessories.
◆ Chinese graphic menu, large screen backlit LCD display is clearer, real-time monitoring of current and voltage.
◆ Optimized circuit design makes the accuracy and stability of positive/reverse wiring consistent.
◆ Automatically recognizes external high-voltage test power frequency 40Hz～70Hz, supports power frequency power supply, variable frequency power supply and series resonance power supply for large capacity high voltage dielectric loss test.
◆ It has reverse wiring low voltage shielding function, under 220kV CVT busbar grounding condition, can perform 10kV reverse wiring dielectric loss measurement on C11 without disconnecting wires.
◆ With computer interface. Through this interface, measurement, data processing and report output can be realized, and the internal measurement software of the instrument can also be upgraded. It can be integrated into a comprehensive high-voltage test vehicle.
◆ Configured with thermal printer, making printing faster, noiseless and clearer.
◆ Added loop poor contact discharge warning function to facilitate judging whether the wiring is reliable.
◆ Enhanced reverse wiring low voltage shielding function, can measure the capacitance and dielectric loss value of two capacitors at one time with one wiring.
◆ Added CVT ratio function, can measure CVT ratio and phase error.
Product Parameters:
◆ Accuracy: Cx: ±（reading×1%+1pF）
tgδ： ±（reading×1%+0.00040）
◆ Anti-interference index: variable frequency anti-interference, can still achieve the above accuracy under 200% interference
◆ Capacitance range: internal high voltage: 3pF～60000pF/10kV 60pF～1μF/0.5kV
external high voltage: 3pF～1.5μF/10kV 60pF～30μF/0.5kV
resolution: up to 0.001pF, 4 significant digits
◆ tgδ range: unlimited, resolution 0.001%, automatically identify capacitance, inductance, resistance three types of test objects.
◆ Test current range: 10μA～5A
◆ Internal high voltage: set voltage range: 0.5～10kV
maximum output current: 200mA
voltage regulation method: continuous smooth adjustment
voltage accuracy: ±(1.5%×reading+10V)
voltage resolution: 1V
test frequency: 45, 50, 55, 60, 65Hz single frequency
45/55Hz, 55/65Hz, 47.5/52.5Hz automatic dual variable frequency
frequency accuracy: ±0.01Hz
◆ External high voltage: maximum test current 1A for positive wiring, power frequency or variable frequency 40-70Hz
maximum test current 10kV/1A for reverse wiring, power frequency or variable frequency 40-70Hz
◆ CVT self-excitation method low voltage output: output voltage 3～50V, output current 3～30A
◆ Measurement time: about 40s, related to measurement method
◆ Input power: 180V～270VAC, 50Hz/60Hz±1%, mains or generator power supply
◆ Computer interface: standard RS232 interface
◆ Printer: Weihuang A7 thermal micro printer
◆ Ambient temperature: -10℃～50℃
◆ Relative humidity: <90%
Note: The above information and technical parameters are compiled and released by Yangzhou Dary Electric Co., Ltd.
