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What are the factors to consider when selecting high-voltage glass insulators?
It is important to consider several factors to ensure their suitability and optimal performance in a specific electrical system.
These factors include the required mechanical strength, the line voltage level, local environmental conditions, expected electrical load, and maintenance requirements.
Additionally, compatibility with other system components and adherence to safety and quality standards are also important considerations during the selection process.
- Mechanical strength
- Line voltage
- Local environmental conditions
- Maintenance requirements
What are the main parameters that define each model of glass insulator?
Each insulator model is defined by a series of parameters defined by the manufacturer and can be seen in the catalogue or on the drawings of every insulator, which must comply with at least the minimum or maximum values required by the different applicable standards.
The main parameters include:
- The Mechanical → Mechanical breaking load
- The Dimensional → Coupling standard, diameter, creepage distance, and pitch
- The Geometric → Shape of the insulator profile
- The Electrical → Electric withstand voltages for puncture, dry and wet power frequency, and lightning impulse withstand voltages
For each power line project, the required chain parameters must be properly calculated, and the most appropriate insulators must be chosen for each case.
