I.Working Principle of GWS-4C Anti-Interference Dielectric Loss Tester
Under AC voltage, the dielectric consumes part of the electrical energy, which is converted into heat energy causing loss. This energy loss is called dielectric loss. When AC voltage is applied to the dielectric, there is a phase angle difference ψ between the voltage and current in the dielectric. The complementary angle δ of ψ is called the dielectric loss angle, and the tangent of δ, tgδ, is called the dielectric loss tangent. The tgδ value is a parameter used to measure 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 the measurement circuit, while the test circuit consists of the test object and the measurement circuit. The measurement circuit is composed of a sampling resistor, a preamplifier, and an A/D converter.
Through the measurement circuit, the amplitudes and phase differences of the standard circuit current and the test circuit current are measured respectively. Then, using a microcontroller with digital real-time acquisition methods and vector operations, the capacitance value and dielectric loss tangent of the test object can be obtained. The instrument has built-in anti-interference measures to ensure accurate measurement under external electric field interference.
II. Main Technical Parameters of GWS-4C Anti-Interference Dielectric Loss Tester
1. Operating Conditions 5℃—40℃ RH＜80%
2. High Voltage Output 2KV 5KV 10KV Three Gears
Capacity 1000VA
3. Accuracy
tgδ Range Accuracy (Positive and Reverse Connection Methods)
tgδ＜10% △ tgδ:±(Reading*2.0%+0.05%)
△ C x :±(Reading*1.0%+1.0PF)
10%＜tgδ＜50% △ tgδ:±(Reading*2.0%+0.05%)
△ C x :±(Reading*1.0%+1.5PF)
4. Resolution tgδ: 0.01% Cx: 0.1pF
5. Measurement Range tgδ<50% 30P＜Cx＜60000P
10KV Cx＜20000P
5KV Cx＜30000P
2KV Cx＜60000P
6. Power Supply AC 220V±10% 50±1HZ
7. Power Harmonic Adaptability ≤ 3%
Power Pulse Interference Adaptability ≤ 5%
8. Dimensions 470（L）×320（W）×390（H）
9. Weight 30 Kg
Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.
