Do the symbols for overhead lines differ for different voltage levels?

2025-08-13

Yes, while the basic symbol of a straight line often remains the same, additional information is included to specify the line's characteristics, including its voltage, number of conductors, and type. For example:

  • Voltage: The nominal voltage (e.g., 66 kV, 110 kV, 400 kV) is written adjacent to the line symbol.

  • Conductor Count: The number of conductors in a bundle (e.g., a "bundle of four") may be indicated by adding a number or a series of parallel lines.

  • Material and Type: The symbol may be annotated with letters or a code to specify the conductor type, such as AAC, ACSR, or OPGW.

Our comprehensive range of Overhead Transmission line equipment is designed to work with all these different line configurations, from standard conductors to specialized OPGW cables, which are also often designated with a unique symbol to indicate their fiber optic core.

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