Considering structural and scenario differences, it is recommended to prioritize 55-2 pin insulators in the following situations:
Straight-line tower sections of medium-voltage distribution lines, where both insulation and compact installation are required.
Angle towers with limited space, where the steel leg structure saves more longitudinal space than suspension insulators.
Sections requiring frequent live-line maintenance, where pin structures are easier to operate than rod insulators.
If the line exhibits these characteristics, it is recommended to use other types of insulators:
Sections where voltage fluctuations frequently exceed the rated value of 55-2.
Tower locations requiring the ability to withstand large-angle turning tension.
Industrial sections with heavy pollution and where regular maintenance is not possible.
When making the final decision, it is necessary to consider both current line parameters and the possibility of capacity expansion in the next 5-10 years. Replacing insulators often requires simultaneous adjustments to hardware and support structures, and the cost of later modifications may far exceed the initial selection price difference.
