IEC 61811-50:2002

FOREWORD
1 General
   1.1 Scope
   1.2 Normative references
   1.3 Terms and definitions
   1.4 Preferred values
   1.5 Marking and documentation
2 Quality assessment procedures
   2.1 Primary stage of manufacture
   2.2 Structurally similar relays
   2.3 Subcontracting
   2.4 Qualification approval procedures
   2.5 Quality conformance inspection
   2.6 Test schedule
   2.7 Order of tests
3 Preparation of blank detail and detail specifications
4 Test schedule
   4.1 Test sequence
   4.2 Types of relays, based upon environmental protection
   4.3 Categories of application of contacts
   4.4 Notes relative to table 1
5 Relay reliability - Failure rate data
Annex A (informative) Data base for failure rates

IEC 61811-50:2002 Is a sectional 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.