NBN EN 60077-4 : 2003

INTRODUCTION
1 Scope
2 Normative references
3 Definitions
  3.1 Components
  3.2 Component parts
  3.3 Operational features
  3.4 Making and breaking characteristics - See Annex B
4 Classification
5 Characteristics
  5.1 Summary of characteristics
  5.2 Type of circuit-breaker
  5.3 Rated values and limiting values for the main
      circuit
  5.4 Operational frequencies
  5.5 Electric and pneumatic control circuits
  5.6 Electric and pneumatic auxiliary circuits
  5.7 Over-current release
  5.8 Recovery voltages
6 Product information
  6.1 Component documentation
  6.2 Marking
7 Normal service conditions
8 Constructional and performance requirements
  8.1 Constructional requirements
  8.2 Performance requirements
9 Tests
  9.1 Kind of tests
  9.2 Tests for verification of constructional
      requirements
  9.3 Type tests for verification of performance
      requirements
  9.4 Routine tests for verification of performance
      requirements
Annex A (informative) - Test circuit to verify the
        making and breaking capacities
Annex B (informative) - Determination of short-circuit
        making and breaking currents, and of percentage
        DC component
Annex ZA (normative) Normative references to international
         publications with their corresponding European
         publications

Provides rules for AC circuit-breakers, the main contacts of which are to be connected to AC overhead contact lines; the nominal voltage of these circuits being in accordance with IEC 60850.