Insulating Oil Tester with Three-electrode Structure

XHYS101

The  Insulating Oil Dielectric Loss Tester is primarily designed for measuring the dielectric loss value, permittivity, and volume resistivity of insulating liquids used in electrical power equipment. Adopting single-chip microcomputer technology, this instrument automatically executes a full sequence of operations, including temperature elevation, temperature control, data sampling, calculation, display, printing, and data storage.

Performance Characteristics:

(1) The oil cup adopts a three-electrode structure conforming to the national standard GB/T5654-2007, with an electrode spacing of 2mm, which eliminates the influence of stray capacitance and leakage on the dielectric loss test results.

(2) The instrument uses medium-frequency induction heating and a PID temperature control algorithm. This heating method has the advantages of non-contact between the oil cup and the heating element, uniform heating, fast speed, and convenient control, ensuring that the temperature is strictly controlled within the preset temperature error range.

(3) The internal standard capacitor is an SF6 gas-filled three-electrode capacitor. The dielectric loss and capacitance of this capacitor are not affected by ambient temperature and humidity, ensuring the accuracy of the instrument even after long-term use.

(4) Comprehensive protection functions. In case of overvoltage, overcurrent, or high-voltage short circuit, the instrument can quickly cut off the high voltage and issue a warning message. A warning message is also issued if the temperature sensor fails or is not connected.

A temperature limiting relay is installed in the medium-frequency induction heating furnace. When the temperature exceeds 120 degrees Celsius, the relay releases, and heating stops.

(5) Convenient test parameter settings. Temperature setting range: 40~120℃, AC voltage setting range:

200~2200V, DC voltage setting range: 0~500V.

(6)  Uses a large-screen TFT full-color LCD touch display for clear display. With simple settings, the instrument can automatically perform tests and automatically store and print test results.

(7) Built-in real-time clock; test date and time can be saved, displayed, and printed along with the test results.

(8) Empty electrode cup calibration function. Measures the capacitance and dielectric loss factor of the empty electrode cup to determine the cleaning and assembly status of the empty electrode cup. Calibration data is automatically saved to facilitate accurate calculation of relative permittivity and DC resistivity.

(9) The instrument is based on the RAM9 platform, providing high test accuracy and speed.

Technical Specifications

☆ Power Supply Voltage: AC 220V±10%

☆ Power Supply Frequency: 50Hz/60Hz ±1%

☆ Measurement Range: Capacitance: 5pF～200pF

Relative Permittivity: 1.000～30.000

Dielectric Loss Factor: 0.00001～100

DC Resistivity: 2.5 MΩm～20 TΩm

Measurement Accuracy: Relative Permittivity: ±(1～10)% of reading

Dielectric Loss Factor: ±(5% of reading ± 0.0002)

DC Resistivity: ±10% of reading

Resolution: Capacitance: 0.01pF

Relative Permittivity: 0.001

Dielectric Loss Factor: 0.00001

Temperature Measurement Range: 40～120℃

Temperature Measurement Error: ±0.5℃

AC Test Voltage: 200～2200V, continuously adjustable, frequency 50Hz

DC Test Voltage: 0～500V, continuously adjustable

Power Consumption: 500W

Ambient Temperature: 0℃～40℃

Relative Humidity: <75%