Parameters of Variable Frequency Dielectric Loss Tester

Parameters of Variable Frequency Dielectric Loss Tester

Usage characteristics:

Dielectric loss measurementtryThe instrument is used for on-site anti-interference dielectric loss measurement or laboratory precision dielectric loss measurement. The instrument is an integrated structure with built-in dielectric bridge, variable frequency power supply, test transformer, and standard capacitor. Adopting frequency conversion anti-interference and Fourier transform digital filtering technology, the measurement is fully automated and intelligent, and the measurement data is very stable under strong interference. The measurement results are displayed on a large LCD screen and come with a built-in micro printer for printing and output.

Working Principle:

Under the action of AC voltage, the dielectric consumes some electrical energy, which will be converted into thermal energy and result in losses. This type of energy loss is called dielectric loss. When an AC voltage is applied to a dielectric, there exists a phase angle difference between the voltage and current in the dielectric. The residual angle δ of PSI is called the dielectric loss angle, and the tangent tg δ of δ is called the dielectric loss angle tangent. The TG δ value is a parameter used to measure the dielectric loss. The instrument measurement circuit includes a standard circuit (Cn) and a test circuit (Cx), as shown in Figure 1. The standard circuit consists of a built-in high stability standard capacitor and a measurement circuit, while the test circuit consists of the test sample and the measurement circuit. The measurement line consists of a sampling resistor, a preamplifier, and an A/D converter. By measuring the standard circuit current and the amplitude and phase of the tested circuit current separately, the capacitance value and dielectric loss tangent value of the test sample can be obtained through vector operation using a digital real-time acquisition method by a microcontroller. The instrument has adopted anti-interference measures internally to ensure accurate measurement under external electric field interference.

Technical Specifications:

1. High voltage output: 0.5-10kV, with an increase of 500V for each level, for a total of 20 levels

High voltage output cable, suitable for mopping use
Three frequencies: 45Hz, 50Hz, and 55Hz
2. Capacity: 1500VA
3. Accuracy: tg δ: ± (reading * 1.0%+0.08%)
Cx: ± (reading * 1.5%+5PF)
4. Resolution: tg δ: 0.01% Cx: 1pF
5. Measurement range: 0.1%<tg δ<50%
3PF< Cx < 60000PF
At 10KV, Cx ≤30000PF
At 5KV, Cx ≤60000PF
6. Power supply: AC 220V ± 10% 50 ± 1Hz
7. Harmonic adaptation: ≤ 3%
8. Usage conditions: -15 ℃ -50 ℃ Relative humidity<80%
9. Dimensions: 460 (L) × 335 (W) × 340 (H)
10. Weight: 30 kg

Parameters of Variable Frequency Dielectric Loss Tester