Model: UB-7.
Type: Parallel Clevis.
Nominal Breaking Load: 30 kN.
Material: Hot-dip galvanized steel, stainless steel closing pin.
Corrosion Protection: Hot-dip galvanizing thickness >= 65 μm, meeting anti-corrosion standards for electrical hardware.
Plate Width: 7 mm.
Connection Aperture: 16 mm (accepts M16 bolts).
Dimensions: 80 mm (length) × 7 mm (width) × 7 mm (thickness).
Applications: Parallel connection of insulator strings in 10kV-35kV transmission lines, securing substation equipment to structures, and supporting and connecting cable terminals.
The Ub-7 Clevis is a right-angle connection fixture commonly used in power equipment. In overhead lines, it's primarily used for connecting insulator strings and securing equipment. Its right-angle structure effectively transmits vertical force. Made from approximately 10mm thick hot-dip galvanized steel sheets, the bracket is bent to create a 90℃ angle, making it suitable for vertically connecting insulator strings to tower crossarms. The Ub-7 Clevis, designated UB-7 or UB-0770, has a breaking load of 70kN and is particularly suitable for medium and low voltage lines. The "7" represents the 70kN load. The hole diameter is 16mm, compatible with M16 bolts. It weighs approximately 0.57kg, the standard weight after galvanizing.
This article provides users with a better understanding of the Ub-7 Clevis through practical application examples. For example:
35kV transmission lines
The first hardware fixture of the ground wire suspension string on a straight tower is often a UB-7 Clevis.
110kV line projects
Connecting overhead conductors to insulator hardware strings, they withstand certain tensile loads.
High-altitude areas
Jumper hardware uses a UB-7 Clevis, with jumper angles spaced 48mm apart, to ensure reliable connection and securement of the jumpers.
The 90℃ right-angle structure plays an irreplaceable role in corner tower fixing, equipment terminal connections, and fiber optic cable systems.
What are the necessary accessories for the UB-7 Clevis use?
M16 hot-dip galvanized bolts
Ø16mm hole diameter, with anti-loosening washers to prevent vibration-induced bolt dislodging.
01
Connects the ball head of the suspension insulator to the bracket hole.
02
Adapters to the insulator bowl head to form a complete suspension chain.
03
Used for copper-aluminum transition connections at transformer terminals.
04
Secures the ground conductor at the corner tower.
05
Detailed installation steps for the Ub-7 Clevis
Confirm the bracket specifications match the environment and inspect the integrity of the supporting hardware, including the quality of the zinc coating.
Mark the mounting point on the tower crossarm or equipment bracket, drill holes to a Φ16mm diameter, and remove any debris from the holes.
Align the right-angle end of the Ub-7 Clevis with the mounting surface, insert M16 hot-dip galvanized bolts, install lock washers, and tighten the bolts in sections to complete the installation.
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