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Line Fittings | XGF Corona-proof (Anti-corona) Suspension Clamp for HV Transmission Lines

Line Fittings | XGF Corona-proof Suspension Clamp is an overhead line fitting used to support bare conductors at the suspension towers and poles of power distribution and transmission lines. It is a corona-proof suspension clamp whose aluminium alloy body, keeper and shielding caps are shaped with large radii and no exposed sharp edges or protruding hardware, so that the electric field at the clamp surface stays below the corona inception level. The XGF series is designed for 220 kV and higher voltage transmission lines where corona discharge, audible noise and radio interference from line hardware must be limited. The clamp body is cast from high-strength aluminium alloy with a long curved trough, smooth bell-mouth ends and rounded contours; the U-bolt nuts and keeper are enclosed by smooth aluminium shield caps. Aluminium-to-aluminium contact with the conductor also avoids galvanic corrosion. The hanger connects to the insulator string through ball-eye or socket-clevis fittings. YAOGU supplies it together with cable clamps, cable lugs, terminal blocks and the complete range of high and low voltage switchgear as a one-stop power equipment solution.

Industry Approvals：
GB/T 2314
IEC 61284


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Model:
XGF

Parameter	Line Fittings
Common Models	XGF
Construction	High-strength cast aluminium alloy clamp body with long curved trough, smooth bell-mouth ends and fully rounded contours; aluminium alloy keeper plate; smooth shield caps covering the U-bolt nuts. Hot-dip galvanized steel U-bolts, nuts and washers; twin hanger ears with pivot pin and cotter pin; hanger connection by ball-eye or socket-clevis to the insulator string.
Core Function & Performance	Supports the conductor at the suspension tower and transfers its loads to the insulator string in the same way as a standard clamp, while the rounded corona-proof shape limits surface field strength so that corona loss, audible noise and radio interference are kept within the limits specified for high voltage lines.
Technical Specs & Ratings	• Applicable line voltage: 10 kV to 500 kV overhead lines (by clamp type) • Standards: GB/T 2314, IEC 61284 • Main components: Aluminium alloy clamp body, aluminium alloy keeper plate, shield caps, galvanized U-bolts, nuts, washers, hanger ears, pivot pin, cotter pin • Applicable conductor diameter range, rated failure load, slip load, corona inception voltage and dimensions: configured according to the line voltage and conductor specification, please contact us.
Typical Application Scenarios	Suspension points of 220 kV, 330 kV, 500 kV and higher voltage AC transmission lines and HVDC lines, large-section ACSR and bundled conductors, lines passing near residential areas where noise and radio interference limits apply.

*Data provided on this page is subject to change based on different manufacturers' variances.

Customization Service

We provide flexible customization services, including conductor diameter range and rated load, single or bundled conductor arrangement, with or without armour rods, hanger type, shielding configuration, packaging. Custom marking options include nameplates, logos and project-specific identification to meet traceability and branding requirements.

Q	What is the XGF suspension clamp?
A	XGF Corona-proof Suspension Clamp is an overhead line fitting that supports bare conductors at suspension towers and poles. It is a corona-proof suspension clamp whose aluminium alloy body, keeper and shielding caps are shaped with large radii and no exposed sharp edges or protruding hardware, so that the electric field at the clamp surface stays below the corona inception level. The XGF series is designed for 220 kV and higher voltage transmission lines where corona discharge, audible noise and radio interference from line hardware must be limited. The clamp body is cast from high-strength aluminium alloy with a long curved trough, smooth bell-mouth ends and rounded contours; the U-bolt nuts and keeper are enclosed by smooth aluminium shield caps. Aluminium-to-aluminium contact with the conductor also avoids galvanic corrosion. The hanger connects to the insulator string through ball-eye or socket-clevis fittings.
Q	Which standards does this suspension clamp comply with?
A	The clamp is designed and tested to GB/T 2314 (general technical specifications for electric power fittings) and IEC 61284 (overhead lines - requirements and tests for fittings), including mechanical failure load, slip load and hot-dip galvanizing requirements. Type test reports can be provided on request.
Q	What is the difference between XGU, XGF and CGU suspension clamps?
A	XGU is the standard fixed type suspension clamp for distribution and transmission lines. XGF is the corona-proof type with a smooth, fully rounded aluminium alloy body and shielded hardware for high voltage lines where corona discharge and radio interference must be limited. CGU is the reinforced type with a longer, deeper trough, additional U-bolts and a stronger hanger for large-section or heavy conductors, long spans and heavy ice or wind loads.
Q	Why is an aluminium alloy body used for the XGF clamp?
A	Aluminium alloy can be cast with the large radii and smooth surfaces required for corona-proof design, it is light, and it is the same material as the conductor so that galvanic corrosion at the contact surface is avoided. The load-bearing bolts and hanger hardware remain hot-dip galvanized steel for strength.
Q	How do I select the correct clamp size?
A	The clamp is selected by the conductor type and outer diameter (for example ACSR 240/30), the required rated failure load and whether armour rods are used. Please send the conductor specification and line voltage; we will recommend the matching clamp grade and hanger fittings.
Q	Where is this suspension clamp typically used?
A	Suspension points of 220 kV, 330 kV, 500 kV and higher voltage AC transmission lines and HVDC lines, large-section ACSR and bundled conductors, lines passing near residential areas where noise and radio interference limits apply.
Q	What information do you need for a quotation?
A	Please provide the conductor type and diameter, line voltage, required rated load, hanger connection type (ball-eye, socket-clevis or U-clevis), quantity and delivery destination. We will confirm the clamp grade and quote accordingly.
Q	Do you supply complementary products?
A	Yes. In addition to high and low voltage switchgear, we supply power cables, cable accessories, electric power fittings and transformers for complete project packages.

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Line Fittings | XGF Corona-proof (Anti-corona) Suspension Clamp for HV Transmission Lines

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