polymer insulator

polymer insulator  can be divided into pin insulators, pin post insulators, railway insulators and crossarm insulator in accordance with insulator application.

Dry power-frequency flashover voltage is one main of 25kv insulator technical data. Insulator manufacturers do Dry power-frequency flashover voltage tests of 25kv insulator including
◆ Dry power-frequency flashover voltage test
◆ Sudden load release test
◆ Temperature-mechanical test
◆ Verification tests
◆ Water-immersion test
◆ Dry power-frequency voltage tests

25kv insulators shall be suitably packed in cardboard boxes to prevent damage during handling and transport. Each box shall contain 24 Nos. of 25kv insulators. The following information shall be clearly marked on each box.
◆ Manufacturer's Name
◆ Quantity
◆ Country of Origin
◆ Gross Weight
◆ Name of the item & catalogue No

25kv insulator made from porcelain and polymer. The mechanical strength of 25kv insulators have 4KN, 6KN, 8KN, 10KN, 12.5KN, 16KN, 70KN, 80KN, 100KN, 120KN, 210KN, 300KN and 530KN.