Post Insulators

INDOOR POST INSULATORS

Application

Epoxy cast resin indoor post insulators can be used for all indoor
applications.
For tropical conditions same types (with special fixing parts) are
available.
They are suitable for temperatures from -25 °C up to +90 °C

Construction

Epoxy cast resin indoor post insulators are cylindrical solid insulators,
with proper creepage and number of ripples.
The main dimensions are in accordance with IEC 60273 - 1990.
Auxiliary inserts are connected with main insert electrically.

Tests
The following tests, according to IEC 60660 - 1990 are performed:

Routine tests

• Visual inspection
• Testing of conductive connection of fixing inserts for post insulators type B (IEC 60660 1999)
• Power-frequency withstand voltage (dry)
• Partial discharge measurement

Sample tests

• Testing of minimum failing load for bending

Additional tests

• Lightning impulse withstand voltage test (on request)
• Testing of minimum failing loads (nominal loads) for bending