Variable Frequency Anti-Interference Dielectric Loss Tester - Yangzhou Darui

Variable Frequency Anti-Interference Dielectric Loss Tester - Yangzhou Darui

Published: 2024-07-01 12:29:59

Category: Dielectric Loss Tester

Product Description

Variable Frequency Anti-Interference Dielectric Loss Tester

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The Variable Frequency Anti-Interference Dielectric Loss Tester is a high-precision instrument for on-site automatic measurement of dielectric loss tangent and capacitance of various high-voltage power equipment in power plants, substations, and other locations..The main power is generated by the internal inverter, which is boosted by a transformer for testing the test object.

Working Principle

Under the action of AC voltage, the dielectric consumes part of the electrical energy, which is converted into heat energy and causes 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's 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 digital signal processing with real-time digital acquisition methods, the capacitance value and dielectric loss tangent of the test object are obtained through vector operations.

Main Technical Parameters

Operating Conditions: -5℃∽40℃ RH<80%

Power Supply: AC 220V±10%, frequency unlimited

High Voltage Output: 1KV∽10KV, in 1kV increments

Accuracy: 5%

Maximum Current: 140mA

Capacity: 1000VA

Self-Exciting Power Supply: AC 0V∽30V, 45HZ/55HZ

Maximum Current: 15A

Resolution: tgδ: 0.001% Cx: 0.1pF

Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.

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