Insulating media are categorized into three main types: gaseous, solid, and liquid, dissipation factor (or Tan Delta) refers to the energy loss caused by the active power dissipation within the insulating medium of electrical equipment under an electric field. Dissipation is usually represented by the loss factor (tan δ), which reflects the phase difference between the leakage current and the capacitive current flowing through the dielectric, in particular, the higher the dissipation factor, the poorer the insulating properties of the material, leading to more energy being converted into heat during operation, over time, this affects the equipment’s lifespan and safety.
The primary purpose of conducting Dissipation Factor (tan δ) tests is to evaluate the insulation condition of the equipment, in order to prevent electrical accidents caused by insulation aging or failure. In practical operations, various types of power equipment used in substations require Tan δ testing, examples include transformers, windings, current transformers (CT), voltage transformers (PT), transformer bushings, cables, and generators, tan δ testing is an indispensable part of maintenance and servicing operations for these devices.
Functions and Features
1. The GTD-61A Automatic Transformer insulating Oil Tan Delta(OTD) & Oil dielectric loss tester,oil Dielectric Dissipation Factor (DDF) tester is highly automated, allowing for the measurement of temperature rise, dielectric loss, and volume resistivity in one go.
2. The test kit adopts medium-frequency induction heating and a PID temperature control algorithm. This heating method has several advantages, including non-contact heating between the oil cup and the heating body, uniform heating, high speed, and convenient control. As a result, the temperature is strictly controlled within the preset temperature error range.
3. The GTD-61A test kit uses advanced DSP and FFT technology to ensure data stability, accuracy, and reliability.
4. The internal standard capacitor is an SF6 inflatable three-point capacitor. The dielectric loss of this capacitor is not affected by ambient temperature and humidity, so the accuracy of the instrument is still guaranteed after long-term use.
5. The large color touch screen and English operation menu make the GTD-61A test kit easy to operate.
6. The GTD-61A test kit provides tips on opening the cover after shutting off the high voltage, short-circuiting the high and low voltage electrodes of the oil cup to eliminate any hidden safety hazards, and ensuring the safety of the operator and normal operation of the equipment.
7. The test kit has a real-time clock, allowing the test date and time to be saved, displayed, and printed with the test results. The device can also display real-time monitoring of the environment.
8. The GTD-61A Automatic Transformer insulating Oil Tan Delta(OTD) & Oil dielectric loss tester,oil Dielectric Dissipation Factor (DDF) tester can automatically store and store up to 100 sets of test data.
9. The test kit has the function of calibrating the empty electrode cup. The capacitance and dielectric loss factor of the empty electrode cup are measured to judge the conditions of the empty electrode cup. The calibration data is automatically saved to facilitate accurate calculation of relative permittivity and DC resistivity.
10. The GTD-61A has a wireless transmission function, making it easy to connect with a computer for data transmission and counter charge functions.
11. The oil can be drained off automatically without being taken out, making it convenient to clean.
GTD-61A Tester Specification:
|
Items |
Specification |
|
Capacitance Measurement Range |
5 pF～200pF |
|
Accuracy |
0.001 ± (1% reading+0.5pF) |
|
Relative Permittivity |
1.000～30.000 ±1% |
|
Dissipation Factor (tan δ) |
0.00001～100 ± (1% reading +0.0001) |
|
DC Resistivity |
2.5MΩm～20TΩm ±10% reading 0.001MΩm |
|
Measured Temp. Range |
0～125℃ |
|
Temp.Measurement Accuracy |
±0.5℃ |
|
AC Test Voltage (RMS) |
500～2000V Continuously adjustable, 50Hz |
|
DC Test Voltage |
0～500V Continuously adjustable |
|
Power Supply |
AC 220V±10%. 50Hz/60Hz ±1% |
|
Operating Temperature |
0℃～40℃ |
|
Relative humidity(RH) |
< 80% RH no condensation |
|
Power consumption |
100W |
|
Dimensions (W×D×H) |
420*380*385mm |
|
Weight |
21kg |
1. Dielectric breakdown (BDV) (ASTM D877 & ASTM D1816, IEC 60156)
2. Tan Delta (Dielectric Dissipation Factor (DDF)/ Power factor) (ASTM D924, IEC 60247, IEC 61620, BS 5737, JIS C2101, VDE 0380-2, IS 6262)
3. Resistivity (ASTM D1169, IEC 60247, BS 5737, JIS C2101, VDE 0380-2, IS 6103)
Kingrun Transformer Instrument Co.,Ltd.
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