Dual frequency conversion dielectric loss measuring instrument

Dual frequency conversion dielectric loss measuring instrumentUsed for on-site anti-interference dielectric loss measurement or laboratory precision dielectric loss measurement. The instrument is an integrated structure with built-in dielectric bridge, variable frequency power supply, test transformer, and standard capacitor. Adopting frequency conversion anti-interference and Fourier transform digital filtering technology, the measurement is fully automated and intelligent, and the measurement data is very stable under strong interference. The measurement results are displayed on a large LCD screen and come with a built-in micro printer for printing and output.

Main technical indicators

Measurement of dielectric loss and capacitance

Accuracy: Cx: ± (reading x 1%+1pF)

TG δ: ± (reading x 1%+0.00040)

Anti interference index: Frequency conversion anti-interference, can still achieve the above accuracy under 200% interference

Capacity range: Internal applied high voltage: 3pF~60000pF/10kV 60pF~1.2 μ F/0.5kV

External high voltage: 3pF~1.5 μ F/10kV 60pF~30 μ F/0.5kV

Resolution: up to 0.001pF, 4 significant digits

Range of TG δ: unlimited, resolution 0.001%, automatic identification of three types of samples: capacitance, inductance, and resistance.

Test current range: 10 μ A~5A

Internal high voltage: Set voltage range: 0.5~10kV

Maximum output current: 200mA

Pressure rise and fall method: continuous smooth adjustment

Voltage accuracy: ± (1.5% x reading+10V)

Voltage resolution: 1V

Test frequency: 45~65Hz integer frequency

49/51Hz, 45/55Hz, 47.5/52.5Hz automatic frequency conversion

Frequency accuracy: ± 0.01Hz

External high voltage: maximum test current 1A/40~70Hz when connected positively

The maximum test current during reverse wiring is 10kV/1A/40~70Hz

Measurement time: about 30 seconds, depending on the measurement method

Other indicators

Input power supply: 180V~270VAC, 50Hz/60Hz ± 1%, powered by mains or generator

Computer interface: Standard RS232 interface

Printer: Comes with a miniature thermal printer

Environmental temperature: -10 ℃~50 ℃

Relative humidity:<90%, no condensation

Dual frequency conversion dielectric loss measuring instrumentMain technical indicators

Main functional characteristics of capacitance and dielectric loss measurement

Variable frequency anti-interference

Adopting frequency conversion anti-interference technology, it can accurately measure even under 200% interference, with stable test data, suitable for conducting anti-interference dielectric loss tests on site.

high-precision measurement

By using techniques such as frequency fluctuation, digital waveform analysis, and bridge self calibration, combined with high-precision three terminal standard capacitors, high-precision dielectric loss measurement is achieved, and the accuracy and stability of positive/negative wiring measurement are consistent.

The input resistance of all ranges of the instrument is below 2 Ω, eliminating the influence of additional capacitance on the test line.

It can be connected to an external oil cup for precision insulation oil dielectric loss testing, and can be connected to a solid material measuring electrode for precision insulation material dielectric loss testing.

Good compatibility

Automatically identify 50Hz/60Hz system power supply, support generator power supply, and can measure normally even with large frequency fluctuations.

Built in series and parallel dielectric loss measurement models, which can be used with calibration tables and dielectric loss standardsCompatible and convenient for instrument calibration.

Multi level security protection ensures personal and equipment safety

High voltage protection: The test sample can cut off the output at high speed by short circuit, breakdown or high voltage current fluctuation.

Low voltage protection: In case of accidental connection to 380V, power fluctuation or sudden power outage, the protection will be activated without causing overvoltage.

Grounding protection: When the instrument is poorly grounded and the casing carries dangerous voltage, the grounding protection is activated.

Anti misoperation: two-stage power switch; Real time monitoring of voltage and current; Multiple button confirmations; The high/low voltage of the wiring terminal is clearly defined; Slow boost, can quickly reduce pressure, sound and light alarm.

Preventing 'capacitance rise': When measuring large capacity samples, there may be a 'capacitance rise' effect of voltage rise, and the instrument can automatically track the output voltage to maintain a constant test voltage.

Seismic performance: The instrument adoptsSeismic design that can withstand strong long-distance transportation vibrations and bumps without damage.

High voltage cable: It is a high-voltage insulated wire that can be dragged to the ground.

Technological breakthrough, powerful functionality

(1) It has positive/reverse wiring, internal/external standard capacitors, multiple working modes of internal/external high voltage, integrated structure, and can perform various conventional dielectric loss tests without the need for any external auxiliary equipment.

(2) Equipped with an external standard capacitor interface, it automatically tracks the frequency of the external test power supply from 40Hz to 70Hz, and supports high-capacity and high-voltage dielectric loss tests for power frequency and series resonant power supplies.

(3) It has a discharge warning function for poor circuit contact to facilitate the judgment of whether the wiring is reliable.

(4) Chinese graphic menu with large backlit LCD display.

(5) Configure a thermal printer to print data clearly, quickly, and without noise.

(6) Equipped with a calendar clock, it can store 100 sets of measurement data.

(7) Equipped with computer interface (optional). Through this interface, measurement, data processing, and report output can be achieved, as well as upgrading the internal measurement software of the instrument. One computer can control 32 instruments and integrate them into a comprehensive high-voltage test vehicle.