Anti-interference dielectric loss tester  | Detailed introduction of technical principles

A tanδ test kit is used to measure the dielectric loss factor (tanδ) of high-voltage equipment (such as transformer bushings, instrument transformers, and cables) in the field. Its core principle is to calculate the ratio of active power loss to reactive current (tanδ) by accurately measuring the amplitude and phase of the current flowing through the insulating medium under AC high voltage.

During testing, the kit typically includes a high-voltage power supply, a standard capacitor, and a precision measuring unit. In the positive connection method, a high-voltage power supply at power frequency is applied to the equipment insulation, and the vector difference between the current in the test object and the current in the standard capacitor is measured and compared. In the reverse connection method (for equipment with one end grounded), the total current flowing through the test object and its phase are directly measured. Using bridge balancing or digital vector analysis techniques, the active component (reflecting insulation loss) and capacitive component of the current are accurately separated, and the tanδ value and capacitance are finally calculated. An increase in the tanδ value can sensitively reflect overall insulation dampness, aging, or deterioration, and is a key parameter for insulation condition diagnosis. Anti-interference dielectric loss tester, dielectric loss (tan δ) tester, automatic anti-interference dielectric loss tester 10kV dielectric loss

1. Features self-excited method testing of CVTs, with single wiring, simultaneously measuring the capacitance and tan δ of C1 and C2.

2. Features low-voltage and high-voltage shielding for reverse wiring; with the CVT bus grounded, 10kV reverse wiring dielectric loss measurement of C11 can be performed without disconnection.

3. Features measurement functions for externally applied voltage and externally applied CN.

4. Features CVT turns ratio measurement function, meeting the turns ratio measurement requirements of CVT devices ranging from 35 to 500kV.

5. Features multi-channel simultaneous measurement function, capable of simultaneously testing the dielectric loss values of four test objects.

6. Features insulation resistance testing function, capable of testing polarization index, absorption ratio, and insulation resistance.

7. Features automatic LCR measurement, capable of measuring inductance, capacitance, and resistance.

8. Employs frequency conversion technology to eliminate 50Hz power frequency interference in the field.

Reliable data can be obtained even in environments with strong electromagnetic interference.

9. Overcurrent protection function; the instrument will not be damaged in the event of a short circuit or breakdown of the test sample.

10. Includes a standard capacitor and high-voltage power supply; facilitates on-site testing and reduces on-site wiring.

11. The instrument features a large LCD screen; operation is simple; the testing process is guided by Chinese character menus.

12. The instrument's function interface includes corresponding wiring diagrams, greatly simplifying wiring for the operator.

13. Features Chinese/English language switching functionality.

1. Operating Conditions: -15℃-40℃, RH＜80%

2. Anti-interference Principle: Frequency Conversion Method

3. Power Supply: AC 220V±10%, Generator Allowed

4. High Voltage Output: 0.5KV -12KV, in 0.1kV increments

5. Accuracy: 2%

6. Maximum Current: 200mA

7. Capacity: 2000VA

8. Self-Excited Power Supply: AC 0V-50V 15A

9. Single Frequency: 45.0Hz-65.0Hz, Adjustable

10. Dual Frequency:
45.0HZ 55.0HZ 47.5HZ 52.5HZ
55.0HZ 65.0HZ 57.5HZ 62.5HZ

11. Resolution: tgδ: 0.1% Cx: 0.1pF

12. Accuracy △tgδ: ±(reading * 1.0% + 0.040%). △Cx: ±(reading * 1.0% + 1pF)

13. Measurement range: tgδ has no limit.

Cx 15pF < Cx < 300nF

10kV Cx = (Cx1 + Cx2 + Cx3 + Cx4) < 60 nF

5kV Cx = (Cx1 + Cx2 + Cx3 + Cx4) < 150 nF

1kV Cx = (Cx1 + Cx2 + Cx3 + Cx4) < 300 nF

CVT test Cx = (Cx1 + Cx2 + Cx3 + Cx4) < 300 nF

14. Insulation resistance: DC high voltage 0.5-10kV Accuracy: ±(reading × 2% + 10V)

15. Measurement range: 0.1MΩ-1000GΩ Measurement error: 5% x reading + 0.1MΩ

16. LCR measurement range: Inductance L>20H (2kV), Resistance R>10KΩ (2kV)

17. LCR measurement accuracy: 1%, angular resolution 0.01

18. CVT ratio range: 10-10000

19. CVT ratio accuracy: 1%, CVT ratio resolution 0.01

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MS-101G3 (CVT ratio + LCR + insulation resistance function) anti-interference dielectric loss tester, dielectric loss (tanδ) tester, automatic anti-interference dielectric loss tester