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Station post type insulators

Station post type insulators should be tested before shipping, made of porcelain materials and silicone rubber materials and used in substation systems.

If Station post type insulators are tested in accordance with AS standards, the insulator specifications
◆ AS/NZS 2947: insulators-porcelain and glass for overhead power lines-voltage greater than 1000 V a.c. part1: test methods-insulator units
◆ AS 4398: insulators-ceramic or glass – station post for indoor and outdoor use – voltages greater than 1000V AC part2: tests
◆ AS 4435: insulators – composite for overhead power lines, test methods and acceptance criteria for string insulator units

The tests for Station post type insulators
◆ Electrical testing
◆ Mechanical strength testing
◆ Power frequency dry flashover voltage test
◆ Puncture withstand voltage

The sheds of Station post type insulators are without fracture, the core materials must not be exposed for composite insulators.

 

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