Based on their primary functions and applications, power fittings can be categorized as follows:
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Suspension Fittings
Also known as support fittings or suspension clamps, these are primarily used to hang conductor insulator strings (commonly on straight-line towers) and suspend jumpers on insulator strings.
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Anchoring Fittings
Also referred to as tension clamps or dead-end clamps, these are mainly used to secure the ends of conductors, fixing them to strain insulator strings. They are also employed for anchoring overhead ground wires and stay wires. Anchoring fittings bear the full tension of conductors or ground wires, and some also function as conductive elements.
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Connection Fittings
Also known as linking components, these are used to connect insulators into strings or join fittings to other fittings. They withstand mechanical loads.
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Splicing Fittings
These are specifically designed for splicing bare conductors and overhead ground wires. They carry the same electrical load as the conductors, and most splicing fittings bear the full tension of the conductors or ground wires.
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Protective Fittings
These are used to protect conductors, insulators, etc. Examples include grading rings for insulators, counterweights to prevent insulator uplift, vibration dampers to mitigate conductor oscillation, and armor rods.
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Contact Fittings
These are used to connect rigid or flexible busbars to the terminals of electrical equipment, for T-joints of conductors, and for non-tension parallel connections. These junctions involve electrical contact, requiring high conductivity and contact stability.
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Fixation Fittings
Also known as power plant fittings or high-current busbar fittings, these are used to secure and connect rigid or flexible busbars to support insulators in distribution installations. Most fixation fittings do not conduct electricity and only serve anchoring, supporting, or suspending purposes. However, as they are used in high-current environments, all components must exhibit no hysteresis loss.
