UNE-EN IEC 60383-1:2024

This part of IEC 60383 applies to insulators of ceramic material or glass for use on a.c. overhead

power lines and overhead traction lines with a nominal voltage greater than 1 000 V and a

frequency not greater than 100 Hz. It also applies to insulators for use on d.c. overhead electric

traction lines.

This part applies to string insulator units, rigid overhead line insulators and to insulators of

similar design when used in substations.

lt does not apply to insulators forming parts of electrical apparatus or to parts used in their

construction or to post insulators which are covered by IEC 60168: Tests on indoor and outdoor

post insulators of ceramic material or glass for systems with nominal voltages greater than 1 000 V.

Tests on insulator strings and insulator sets (for example, wet switching impulse voltage) are

dealt with in part 2 of IEC 60383.

The object of this part is:

to define the terms used

to define insulator characteristics and to prescribe the conditions under which the specified

values of these characteristics shall be verified

to prescribe test methods

to prescribe acceptance criteria.

This part does not include requirements dealing with the choice of insulators for specific operating conditions.

Specific requirements on the use of coatings on ceramic or glass insulators are described in

the informative Annex C.

NOTE A guide for the choice of insulators under polluted conditions has been published, see IEC 60815-1 and -2.

Numerical values for insulator characteristics are specified in IEC 60305, IEC 60433 and IEC 60720.