Product Name: Corona Ring Aluminum Grading Ring End Fitting Accessories for Insulator Model NO.: Half tube/Hollow ring/Bird-proof type Type: Protection Fittings Usage: Line Fittings Technics: Die Casting Material: Die-Casting Aluminum/Hot DIP Galvanized Trademark: MPC Transport Package: Wooden Case Specification: By voltage grade Origin: Guangzhou, China HS Code: 85479090 Product Description Half tube typeHollow ring typeBird-proof typeAlluminum alloy or Steel galvanizing ringCorona ring is classified into closed corona ring of ordinary type, bird-preventing helmet closed ring, semi-ring by structure; die-cast aluminum, aluminum tube and stainless steel tube by material. The abovementioned rings are all of current-leading structure, that is, in the case of pollution flashover or lightening flashover when the composite insulator is operating, the current will be directly led to the terminal of end fittings instead of flowing through the terminal sheath and crimping part, so as to protect the seal part from damage and the crimping part from the impact of thermal expansion thereby resulting in the grip strength reduction of the metal fittings.NO.Outer diameter of grading ring (mm)Remarks1160Used for the high voltage terminal of 750kV product2232Used for the high voltage terminal of 1000kV productUsed for the high voltage terminal of±800kV product3250Used for the product of 110kV-220kV4260Used for the product of 110kV-220kV5300Used for the product of 220kV-330kV6350Used for the product of over 330kV-500kV7370Used for 500 kV product 8400Used for ±500kV product9450Used for the low voltage terminal of750kV product10560Used for the low voltage terminal of±800kV product