The large diameter, smooth spherical shapes of corona rings/toroids/balls helps to control the local E-Field, thereby suppressing the generation of corona. As the output voltage increases the diameter of the required corona ring/toroid/ball must also increase to obtain effective corona suppression.

What Is A Corona Ring Used For?
The aluminum corona rings are mainly used for high voltage industry to suppress corona effectively. At sharp point (like bushing head) the electric field is high which results in corona. Aluminum corona ring ( shielding ring) should be installed at this point. The ring is suitable for the voltage form of alternating current (AC), which can distribute the high voltage evenly around the object to ensure that there is no potential difference (PD) between the various parts of the ring.

The larger outside diameter, smooth polishing surface finish of aluminum corona rings/shielding rings can help control the local electric field. So electric field gradient reduces and suppresses the corona. As the testing voltage increases the outside diameter of the required corona ring/shielding ring must also increase to obtain better corona control effect. Highv has rich decades of experience in corona rings design and shielding solutions technology, uses advanced manufacturing equipments and high efficient drawing software, which can make sure user’s every project to run more smoothly, safely and efficiently.​

Aluminum Corona rings are also known as corona shielding rings, which are widely used in high voltage test equipments and power systems (substations, high voltage transmission line, AC voltage system, etc.) and are mainly made of aluminum alloy. The aluminum corona ring can be divided into single ring and phase to earth one. Meanwhile, in a lot of supporting AC/DC measurement of electrical equipments, often used aluminum corona rings.

1. Corona Rings and Aluminum Flanges for Outdoor Terminations, Power Cable Accessories 110kv.

Outdoor terminations MKB 72,5 / MKB 126 / МКВ 145 / MKB 170

Dry type terminations MKBC 126 / MKBC 145

Joints MCB 72,5 / MCB 126 / MCB 145 / MCB 170

GIS terminations MBB 126 / MBB 145 / MBB 170

The power cables assembly is used for transmission of electrical power and numerous types of electrical testing.

2. Grading Rings (arcing horns/arcing rings) for Insulators in High Voltage Transmission Line.

(66kv, 110kv,220kv,360kv,500kv....1000kv).
High voltage transmission lines are used for long distances electricity delivery.

3. Corona rings for High Voltage Capacitor Banks and Dividers.

Corona rings/ corona toroids/corona balls/Grading rings/Corona Shields manufacturing.
High voltage capacitor banks and dividers are widely used in electrical power industry, such as standard capacitors, high voltage compensation capacitors, starting capacitors, phase changers, etc. Depending on the specific type, high voltage dividers are used to measure alternating voltage (AC), direct voltage (DC), lightning impulse voltage (LI), and switching impulse voltage (SI) systems.

4. GIS (Gas Insulated Switchgear), Aluminum Corona Shields supplying.
A gas insulated Switchgear (GIS) is a kind of high voltage equipment in which the major structures are contained in a sealed environment with sulfur hexafluoride gas as the insulating medium.

5. Power Transformer&AC Voltage Test Transformer Corona rings/ corona toroids/corona balls/Grading rings/Corona Shields factory.
Power transformer is a device which is used to transfer electricity from one circuit to another by electromagnetic induction. The energy transmission is followed by no change in frequency. AC voltage test transformer is used to be the electrical test performed on the component (such as, transformer bushings, surge arresters, insulating materials) and high voltage testing systems to determine the insulation effect.

6. Corona Ring For High Voltage Bushing.

Corona rings/ corona toroids/corona balls/Grading rings/Corona Shields manufacturing

A high voltage bushing is a type of insulator that allows an electrical conductor to pass safely through through an earthed barrier such as a wall or a metal tank.

7. Aluminum Gradient rings for Impulse Voltage Generator&Current Generator Testing System.
Impulse voltage generator and current generator testing systems are used for impulse voltage testing of power transformers, power cables, gas insulated switchgears (GIS), surge arresters, and other high voltage devices.

8. Corona Rings For High Voltage Laboratory (HV Electric testing Equipments）
The high voltage laboratory can provide a wide range of possibilities in the field of high voltage testing and research. Many components and measuring systems are used in the high voltage laboratory, such as power transformer, voltage or current generator, high voltage divider, bushings, power cables, corona rings and shields, etc.

9. Potential Rings for Surge Arrester(HV lightning Arresters)
A surge arrester device is used to protect the electrical power system from surges caused by lightning.