NBN EN 61811-53 : 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
      (ordering information)
  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 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)
Tables
Annex ZA (normative) Normative references to international
         publications with their corresponding European
         publications

Applies to electromechanical all-or-nothing telecom relays of assessed quality.