Installing a corona ring at the high voltage test site can be difficult
especially if it is your first time to do or you are green hand in corona rings operation.
As you know, the corona ring raw material is aluminum. Ring body must be handled carefully otherwise it could suffer external damages that can result in the failure of high voltage test.
This definitive guide can be used for corona ring installation of both single and phase to earth ones.
It is important that you know which details need to be carried out.
All required details should follow local high voltage test standards.
Without further ado, let’s jump straight into the topic.
What Is A Corona Ring Used For?
Energy is the foundation for human life and development, which is the lifeblood of the national economy.
With the development of the efficient UHVDC transmission and distribution of electricity technology, the high voltage centers and laboratories could do huge test of design and research each year.
A corona ring, it is called anti corona ring or corona shield ring, which has become the basic and core corona component in power and high voltage industry.
So they are mainly used for high voltage industry to suppress corona effectively.
How Does Corona Ring Work?
When we operate the high voltage test, the electric field at the conductor is greatest.
And corona discharge occurs on the part of the sharp points. The aluminum round ring is installed at this point to suppress corona.
The function of the corona ring is to prevent sideflash.
It is suitable for AC voltage, which can evenly distribute the high voltage around the object to ensure that there is no potential difference between the various parts of the ring, so as to achieve the effect of voltage equalization.
How To Make The Corona Ring Installation Successfully?
From common raw materials to manufacturing the corona rings, there are complete solutions that you can do with your project.
High quality rings are easily for different devices and systems installation.
In this part of the content, you are going to learn more about installation details that help your high voltage test to be more successfully and efficiently.
Corona Ring Installation For 1000kV Power Transformer (The Picture Originates From Tianwei Baobian Electric)
# 1. Installation location is the first main factor which should be considered by us.
You need to think of electrical safety when standing the site of the installation center.
You should have the environment evaluated beforehand.
Likewise, the structural analysis of the load needs to be analyzed for the integrity of the structural design.
Such as gantry crane size configuration, lift platform stability, lift wire safety confirmation, measuring device and equipment function, etc.
# 2. Ground wire can help improve electrical safety.
So grounding wire should be checked that your equipment is properly grounded to remove any static charges that have gathered in it.
Especially for the power transformer and bushing test measurement.
# 3. During the corona ring installation process, all engineers should notice the around safety when operating the lift equipment.
Generally the ring needs to be polished bright to achieve more smooth and no burr surface finish to ensure better corona control effect.
Let’s why we should check the corona rings body and surface if it is damaged or not.
Knocking the ring body with sharp hard objects and tools is not allowed. Because this dangerous way of doing will harm the ring body.
So the corona effect will have big influence. For making sure the personnel’s safety, pedal action can not be done during installation process.
# 4. The dimension and size should be clear.
As you know, the drawing of design ring is the basic part before production process of rings.
So all installation such as holes position, diameter, bracket measurement, flanges size, etc should be marked clearly in each drawing design on power transformer and bushing.
The tolerance is allowed in real manufacturing process. But it does not influence the final installation on test equipment.
When we install the corona rings and shield in one high voltage testing hall, this installation dimensions should be confirmed clearly.
# 5. Final debugging inspection before starting the new high voltage test.
We should finish the final inspection before all unit becoming energized. We should arrange all staff and study the details of the safety protocol before every experiment.
Conclusion
There are also some other details that we should consider for corona ring installation for your high voltage project, but the above-given aspect is the most important parts of operation.
It will help you to know more about products themselves and installation details.