NBN EN 61811-54 : 2002

1 General
  1.1 Scope
  1.2 Normative references
  1.3 Front page of the detail specification
2 Characteristic values of the relay
  2.1 General data
  2.2 Construction of IECQ type designation
  2.3 Coil data
  2.4 Contact data
      2.4.1 Electrical endurance and switching frequency
      2.4.2 Static contact-circuit resistance
      2.4.3 Mechanical endurance
      2.4.4 Timing (without suppression device)
  2.5 Mounting
  2.6 Environmental data
  2.7 Package of relays for automatic handling (if applicable)
3 Qualification approval procedures
4 Quality conformance inspection
  4.1 Formation of inspection tools
  4.2 Intervals between tests
5 Marking and documentation
  5.1 Marking of the relay
  5.2 Marking of the package
  5.3 Documentation
6 Annexes
7 Tests
  7.1 Standard conditions for testing
  7.2 Mounting of test specimens during the test
  7.3 General conditions for testing
8 Ordering information
9 Relay reliability - Failure rate data (optional)
Annex ZA (normative) - Normative references to international
         publications with their corresponding European
         publications

Applies to electromechanical all-or-nothing telecom relays of assessed quality. Provides relays for operation in telecommunication applications.