PURPOSE AND SCOPE

This specification defines the functional and performance requirements, enabling parameters and additional technical requirements for solid core post insulators rated from 1 kV to 420 kV connected to the National Grid UK Electricity Transmission System.

The specific requirements for solid core post insulators detailed in this document are by reference to IEC 60273, BS EN 60168 and associated documents and support the more general conditions defined in the companion documents TS 1 and TS 2.1.

This specification applies to new build and asset replacement schemes. For new build, post insulators shall be supplied to IEC 60273. For asset replacement and extensions to existing substations, post insulators may be required which are interchangeable with existing equipment, in which case they shall comply with the physical characteristics as given in Appendix A of this specification.