Dielectric loss (tan δ) tester | Test precautions?

Dielectric Loss (tanδ) Tester/tanδ Test Kit - Test Precautions and Features? The test precautions and core features of the tanδ test kit (dielectric loss factor tester) are as follows:

I. Test Precautions

1. Safety Grounding and Shielding: Ensure reliable grounding of the instrument casing, the test sample casing (e.g., bushing flange), and the high-voltage source. Correctly using the instrument's shielding ring or shielding wire is crucial to eliminating surface leakage current and electric field interference from surrounding live equipment, ensuring measurement accuracy.

2. Correct Wiring Method Selection: Select the direct connection method, reverse connection method, or cross-connection method based on the test sample type and site conditions. The direct connection method is suitable for test samples with one end grounded and provides the most accurate measurement; the reverse connection method is suitable for test samples with both poles insulated from ground. Always refer to the instruction manual for correct wiring.

3. Anti-interference Measures: In strong electromagnetic field environments such as substations, anti-interference measures are necessary, such as eliminating the influence of interference sources through phase shifting or phase inversion functions, or shutting down nearby operating equipment if the power outage time allows. Measure the background interference level before testing.

4. Environmental Condition Control: Record ambient temperature and humidity. When humidity is high, a shielding ring should be installed on the test sample surface and connected to the instrument's shielding terminal to eliminate the influence of surface leakage. Test results need to be converted to temperature for historical comparison.

II. Core Features

1. High Precision and High Sensitivity: Utilizing a high-precision digital bridge principle, it can accurately measure minute changes in dielectric loss factor (tanδ) and capacitance (Cx), and is extremely sensitive to distributed defects such as insulation dampness and aging.

2. Multi-Frequency Testing and Insulation Diagnosis: In addition to power frequency (50Hz/60Hz), it typically supports testing at multiple frequencies (e.g., 10Hz-300Hz). By analyzing the trend of tanδ changes at different frequencies, the characteristics of insulation materials can be evaluated more deeply.

3. Automatic Calculation and Strong Anti-Interference Capability: It has the functions of automatically applying test voltage, calculating vector values, and separating resistive and capacitive currents. Employing digital filtering and other technologies, it has strong anti-interference capabilities and can obtain stable readings in complex electromagnetic environments.

In summary, tanδ testing is an effective means of diagnosing overall degradation of insulation materials. Its value lies in its ability to sensitively detect distributed defects such as moisture absorption and aging of insulation through high-precision measurement of changes in dielectric loss and capacitance. The core of its operation lies in effectively shielding interference and correctly selecting the wiring method to ensure the accuracy and reliability of the data.

The MS-101G1 tanδ test kit includes: 

1. Self-excited CVT testing, allowing simultaneous measurement of the capacitance and tanδ of C1 and C2 with a single connection.

2. Reverse wiring low-voltage shielding and high-voltage shielding functions, enabling 10kV reverse wiring dielectric loss measurement of C11 without disconnection when the CVT bus is grounded.

3. Measurement functions for external voltage and external CN, and simultaneous forward and reverse measurement. (Keywords: Dielectric loss tester, dielectric loss angle tester, tanδ test kit, dielectric loss test kit, anti-interference dielectric loss tester, dielectric loss (tanδ) tester, automatic anti-interference dielectric loss tester)