IEC 61811-51:2002

FOREWORD
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)

IEC 61811-51:2002 Is a blank detail specification applicable to electromechanical all-or-nothing telecom relays of assessed quality. Selects the appropriate methods of test to be used in detail specifications and contains basic test schedules to be used in the preparation of such specifications.