Shielding Sphere

Product Introduction

A corona shielding sphere is also known as corona shielding ball and used in high voltage bushing and power testing equipment, which are mainly made of aluminum alloy.

Generally the corona shielding sphere needs to be polished bright to achieve more smooth and no burr surface finish to ensure better corona shielding effect.

Corona shielding sphere is widely used on the end fittings of high voltage bushings and other high voltage testing equipments. High voltage can result in unwanted noise and corona, so corona shielding spheres are needed.

Corona shielding sphere 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 sphere.

The corona shielding sphere is widely used for high voltage bushing and equipment to suppress corona effectively.

At sharp point (like bushing head) the electric field is high which results in corona. Aluminum corona shielding sphere should be installed at this point.

The larger outside diameter, smooth polishing surface finish of aluminum corona shielding sphere 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 shielding sphere must also increase to obtain better corona control effect.

Product Features

• High moistureproof

• Anti-causticity

• High strengh

• Excellent silvery bright finish

• Good shielding advantage

• Tasteless&non-poisonous

• Competitive price with excellent quality

• Customized sizes and specifications/OEM is available

Application

• Transmission line Insulators Corona Rings/Grading rings/Guard rings Protection

• HV Surge Arresters(lightning Arresters)Aluminum Tube rings

• High Voltage Capacitor Banks Corona Shields/Grading rings

• GIS (Gas Insulated Switchgear) Corona Rings/Grading rings

• Power transformer/High Voltage current transformers Corona shields

• GIS (gas insulated switchgear) Aluminum Conductors

Technical Parameter