Hi, colleagues in the power industry! Today, let's talk about a technical topic that everyone may have encountered or will definitely encounter in the future - the voltage resistance of series resonant cables. Does it sound a bit professional? Don't worry, I will try my best to explain it clearly to everyone in plain language, and I guarantee that after listening, you will feel, "Oh, so that's what happened

What is series resonance? Why is it closely connected to cable withstand voltage?

Let's first give a brief science popularization. Series resonance, as the name suggests, is the process of connecting an inductor (such as a cable itself) and a capacitor (used to provide excitation inductance) in series, and then adding a power source. By adjusting the frequency of the power source, they reach a special "resonance" state. In this state, the voltage on the cable will be amplified many times, far exceeding the actual input voltage. This is simply too convenient for cable withstand voltage testing!

Why is it so difficult to do a withstand voltage test? It's simple, the insulation performance of cables directly affects the safe and stable operation of the entire power system. Before leaving the factory, after installation, and at specific stages of operation, it is necessary to conduct voltage withstand tests on cables to verify their insulation strength, ensure that they can withstand voltage fluctuations and potential overloads during operation, and avoid insulation breakdown and other accidents.

The 'behind the scenes' mastermind affecting the voltage resistance of series resonant cables

There are many factors that affect the effectiveness of the series resonance test. Let's take a look:

The capacitance and inductance of the cable are the two core parameters that determine the required excitation inductance and test voltage.

The frequency and voltage range of the power supply: The performance of the test power supply directly determines whether it can stably achieve the required resonant frequency and voltage.

Experimental environment: Environmental factors such as temperature and humidity can also affect the performance of insulation materials.

Test wiring and grounding: Standardized operation and good grounding are prerequisites for ensuring test safety and accurate data.

What "artifacts" can make series resonance testing easier?

When it comes to tools, Wuhan UHV Power Technology Co., Ltd.'s equipment is definitely among the best in the industry! Their series resonant voltage withstand device adopts advanced variable frequency series resonant technology, which can flexibly adjust the frequency, accurately control the voltage, and make cable insulation testing efficient and reliable. Moreover, their device has a user-friendly interface and an automated testing process, greatly reducing operational difficulty and minimizing human error.

How to "play" with series resonant cable withstand voltage?

Simply put, the process is as follows:

Connecting equipment: Connect the series resonant device of Wuhan UHV Power Technology Co., Ltd. to the cable under test.

Set parameters: Based on the specifications of the cable, set the required test voltage and frequency range on the equipment.

Step up test: The equipment will automatically adjust the frequency, gradually increase the voltage, and monitor the partial discharge of the cable in real time.

Maintain voltage resistance: After reaching the preset test voltage, it will be maintained for a period of time to observe whether the cable is stable.

Data recording and analysis: After the experiment is completed, the equipment will generate a detailed test report, which facilitates our power equipment testing and analysis.

Through this method, we can more intuitively and accurately evaluate the insulation health status of cables, providing important basis for the selection and maintenance of power cables.

EEAT principle, making your profession more recognized

When conducting specialized work such as cable withstand voltage testing, it is particularly important to follow the EEAT (Experience, Expertise, Authoritarianism, Trustworthiness) principle. We, Wuhan UHV Power Technology Co., Ltd., have been deeply involved in the field of high-voltage testing equipment for many years, with rich practical experience in power systems and solid professional knowledge. The solutions we provide are not only technologically advanced, but also focus on the accuracy and safety of experiments, striving to provide users with trustworthy products and services.