CEI EN 60255-27 : 2014

FOREWORD
INTRODUCTION
1. Scope
2. Normative references
3. Terms and definitions
4. General safety requirements
5. Protection against electric shock
6. Mechanical aspects
7. Flammability and resistance to fire
8. General and fundamental design
    requirements for safety
9. Marking, documentation and packaging
10. Type tests and routine tests
Annex A (normative) - Isolation class
        requirements and example diagrams
Annex B (normative) - Rated impulse voltages
Annex C (normative) - Guidance for the
        determination of clearance, creepage
        distance and withstand voltages
Annex D (informative) - Components
Annex E (normative) - External wiring
        terminations
Annex F (informative) - Examples of battery
        protection
Bibliography
Annex ZA (normative) - Normative references to
         international publications with their
         corresponding European publications

Defines the product safety requirements for measuring relays and protection equipment having a rated a.c. voltage up to 1000 V with a rated frequency up to 65 Hz, or a rated d.c. voltage up to 1500 V.