High-precision measurement of anti-jamming dielectric loss tester

The anti-interference dielectric loss tester is used for on-site anti-interference dielectric loss measurement, or laboratory precision dielectric loss measurement. The instrument is an integrated structure, built-in dielectric loss bridge, variable frequency power supply, test transformer and standard capacitors. The use of variable frequency anti-interference and Fourier transform digital filtering technology, automatic intelligent measurement, measurement data under strong interference is very stable. The measurement results are displayed on a large-screen liquid crystal display with a printable output from a mini-printer.

1.1; main technical indicators

Accuracy: Cx: ± (reading × 1% + 1 pF)

Tgδ: ± (reading × 1% + 0.00040)

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

Capacitance range: Internal pressure: 3pF to 60000pF/10kV60pF to 1μF/0.5kV

Application of high pressure: 3pF ~ 1.5μF/10kV60pF ~ 30μF/0.5kV

Resolution: 0.001pF, 4 significant digits

Tgδ range: unlimited, resolution 0.001%, capacitance, inductance, resistance three kinds of test products automatically identify.

Test current range: 10μA～5A

Internal pressure: set voltage range: 0.5 ~ 10kV

Output current: 200mA

Lift pressure mode: continuous smooth adjustment

Voltage Accuracy: ± (1.5% × reading + 10V)

Voltage Resolution: 1V

Test frequency: 45, 50, 55 single frequency

Frequency accuracy: ±0.01Hz

External high voltage: test current 1A at positive connection, power frequency or frequency conversion 40-70Hz

Test current 10kV/1A for reverse wiring, power frequency or frequency conversion 40-70Hz

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

Measurement time: about 40s, related to the measurement method

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

Computer Interface: Standard RS232 Interface

Printer: Wei Huang A7 Thermal Micro Printer

Ambient temperature: -10°C～50°C

Relative humidity: <90%

1.2; main features

1.2.1; Frequency conversion anti-interference

The frequency conversion anti-interference dielectric loss tester adopts frequency conversion anti-jamming technology and can still measure accurately under 200% interference. The test data is stable and suitable for anti-interference dielectric loss test at the site.

1.2.2 High-precision measurement

The frequency conversion anti-interference dielectric loss tester adopts digital waveform analysis and bridge self-calibration technology, and cooperates with high-precision three-terminal standard capacitors to achieve high-precision dielectric loss measurement.

The variable-frequency anti-interference dielectric loss tester has all range input resistances less than 2Ω, eliminating the effect of measuring the additional capacitance of the cable.

1.2.3 Multi-level security protection to ensure personal and equipment safety

High-voltage protection: Short-circuit, breakdown or high-voltage current fluctuations of the test sample can cut off the output at a high speed in a short-circuit manner.

Low-voltage protection: misconnected 380V, power supply fluctuations or sudden power failure, start protection, will not cause over-voltage.

Grounding protection: When the instrument is badly grounded and the enclosure is carrying dangerous voltage, start the grounding protection.

C;;V;;T: Four protection limits for high-voltage voltage and current, low-voltage voltage and current, will not damage the device; misselection menu will not output the excitation voltage. CVT measurement without 10kV high voltage output.

Anti-misoperation: Two-stage power switch; voltage and current monitoring in real time; multiple key confirmation; terminal high / low pressure distinct; speed boost, can quickly step down, sound and light alarm.

Anti-"capacity rise": When measuring large-capacity samples, there will be a voltage rise "capacity rise" effect, the instrument can automatically track the output voltage, keep the test voltage constant.

Anti-seismic performance: The instrument uses a unique seismic design, can withstand strong long-distance transportation shocks, bumps and will not be damaged.

High-voltage cable: It is a high-voltage resistant insulated wire that can be used by mopping.

1.2.4 powerful, product serialization

(1) Anti-interference dielectric loss tester | Oil dielectric loss tester/dielectric loss tester With positive/negative wiring, internal/external standard capacitance, internal/external high voltage multiple working modes, integrated structure, can be used for various routines Dielectric loss test, no external auxiliary equipment.

(2) Liquid crystal display, menu operation, rich test data, auto-resolving capacitance, inductance, resistance type test products, with a micro-printer can print out.

(3) With an external standard capacitor interface, an external oil cup can be used for precision dielectric dielectric loss test, external solid material measuring electrodes can be used for precision dielectric material dielectric loss test, and high voltage standard capacitors can also be used for high voltage dielectric loss test.

(4) Automatically identify 50Hz;/;60Hz system power supply, and support generator power supply, even if the frequency fluctuates greatly,

Can also be measured normally.

(5) Built-in series and parallel two dielectric loss measurement models facilitate instrument verification.

(6) 255 sets of measurement data can be stored.

(7) Anti-jamming dielectric loss tester | Oil dielectric loss tester/dielectric loss tester When CVT self-excited method is used, C1/C2 can be measured at the same time by one-time wiring, and automatically compensate the busbar grounding and the partial pressure effect of the standard capacitor. Change lines and attach any accessories.

(8) Chinese graphic menu, large-screen backlight LCD display is more clear, current and voltage are monitored in real time.

(9) The optimized circuit design ensures the accuracy and stability of the positive/negative wiring.

(10) Automatic identification of external high-voltage test power supply frequency 40Hz ~ 70Hz, support power frequency power supply, variable frequency power supply and series resonant power supply for large-capacity high-voltage dielectric loss test.

(11) It has anti-wiring and low-voltage shielding function. Under 220kVCVT bus grounding condition, the C11 can be used to measure the dielectric loss of the 10kV anti-wiring without rewiring.

(12) with a computer interface. Through this interface, measurement, data processing, and report output can be achieved, as well as internal measurement software upgrades. Can be integrated into an integrated high-voltage test car.