NBN EN 61811-55 : 2002

1 General
  1.1 Scope
  1.2 Normative references
  1.3 Front page of detail specification
2 Characteristic values of the relay
  2.1 General data
  2.2 Construction of IECQ type designation (ordering
      information)
  2.3 Coil data
  2.4 Contact data
  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 lots
  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 international
         publications with their corresponding European
         publications

Applicable to electromechanical all-or-nothing telecom relays of accessed quality. Relays according to this are provided for the operation in telecommunication applications. Along with this, they are also suitable for particular industrial and other applications.