Electrical Characteristics
Common ones include ratedvoltage,current, active power, reactive power, resistance, capacitance, inductance,conductance.
Semiconductors cover a broader range, such as DC current gain,AC current gain, rectified current, reverse breakdown voltage, forward voltage drop, junction capacitance,noise figure, characteristic frequency, cutoff frequency, power dissipation, etc.
ICs also have many, such as maximum operating voltage, slewrate of op-amps,bandwidth, distortion factor, conversion rate of ADCs, conversion accuracy, resolution, etc.
The main electrical properties of electrical performance connectors include contact resistance, insulation resistance, and dielectric strength. ① Contact resistance: High-quality electrical connectors should have low and stable contact resistance. The contact resistance of connectors ranges from a few milliohms to tens of milliohms. ② Insulation resistance: An index measuring the insulation performance between contacts and between contacts and the shell of a connector, ranging from hundreds of megohms to thousands of megohms. ③ Dielectric strength, also known as voltage withstand or dielectric withstand voltage, characterizes the ability of a connector to withstand the rated test voltage between contacts or between contacts and the shell.
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Electrical Performance
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electric property -
Hardware
To study the influencing factors of charge accumulation process in epoxy insulating materials and reduce the surface charge accumulation effect, a high resistance meter was used to measure key electrical properties such as volume resistivity and surface resistivity of epoxy insulating materials at different time points under DC voltage. A DC test device was also used to measure surface charge under high DC voltage using the capacitive probe method. Through relevant theoretical research, the relationship between resistivity of epoxy insulating materials and the duration of DC voltage application was obtained, the relationship between electrical properties and charge accumulation of epoxy insulating materials was established, and improvement measures for the electrical properties of epoxy insulating materials were clarified. This has practical significance for reducing surface charge accumulation on epoxy insulating materials under DC voltage and improving the operational reliability of DC insulators in power transmission and transformation equipment.
Theory of charge accumulation process
Charge must migrate from the interior to the surface to dissipate, which will lead to a further decrease in the freely movable charges inside the epoxy insulating material. At this time, the migrated
