EN 60255-5:2001

INTRODUCTION
1 Scope and object
2 Normative references
3 Definitions
4 Insulation coordination
   4.1 Basic principles
   4.2 Voltages and voltage ratings
   4.3 Time under voltage stress
   4.4 Pollution
   4.5 Information to be found on the relay or in the
       operating structures
   4.6 Insulation material
5 Dimensioning requirements and rules
   5.1 Dimensioning of clearances
   5.2 Dimensioning of creepage distances
   5.3 Requirements for design of solid insulation
6 Tests and measurements
   6.1 Tests
   6.2 Measurements
Annex A (informative) Nominal voltages of supply systems
Annex B (informative) Altitude correction factors
Annex C (informative) Guidance for impulse voltage tests
Annex D (informative) Measurement of creepage distances and
         clearances
Annex ZA (normative) Normative references to international
         publications with their corresponding European
         publications

Lays down general requirements for the insulation coordination of measuring relays and protection equipment. Gives guidance for the selection of clearances and creepage distances and other aspects related to the insulation of measuring relays and protection equipment; specifies requirements for voltage tests and insulation resistance measurement.