IEC 61811-55 pdf download.Electromechanical all-or-nothing relays
This part of IEC 61811 is a blank detail specification applicable to electromechanical all-or- nothing telecom relays of assessed quality. Relays according to this standard are provided for the operation in telecommunication applications. However, as electromechanical all-or- nothing relays, they are also suitable for particular industrial and other applications. This standard selects from IEC 61810-7 and other sources the appropriate methods of test to be used in detail specifications derived from this specification, and contains basic test schedules to be used in the preparation of such specifications in accordance with IEC 61811-1. Detailed test schedules are contained in the detail specifications supplementary to this specification.
1.2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60068-1:1988, Environmental testing – Part 1: General and guidance Amendment 1 (1992) IEC 60068-2-17:1994, Environmental testing – Part 2: Tests: Test Q: Sealing IEC 60068-2-20:1979, Environmental testing – Part 2: Tests: Test T: Soldering Amendment 2 (1987) IEC 60068-2-47:1999, Environmental testing – Part 2-47: Test methods – Mounting of components, equipment and other articles for vibration, impact and similar dynamic tests IEC 60255-14:1981, Electrical relays – Part 14: Endurance test for electrical relay contacts – Preferred values for contact loads IEC 60695-2-2:1991, Fire hazard testing – Part 2: Test methods – Section 2: Needle-flame test IEC 61709:1996, Electronic components – Reliability – Reference conditions for failure rates and stress models for conversion IEC 61810-7:1997, Electromechanical all-or-nothing relays – Part 7: Test and measurement procedures IEC 61811-1:1999, Electromechanical non-specified time all-or-nothing relays of assessed quality – Part 1: Generic specification IEC 61811-50:2002, Electromechanical all-or-nothing relays – Part 50: Sectional specification – Electromechanical all-or-nothing telecom relays of assessed quality QC 001002-2, Rules of Procedure of the IEC Quality Assessment System for Electronic Components (IECQ) – Part 2: Documentation QC 001002-3, Rules of Procedure of the IEC Quality Assessment System for Electronic Components (IECQ) – Part 3: Approval procedures QC 001005, Register of Firms, Products and Services approved under the IECQ System, including ISO 9000 CECC 00802:1990, Guidance document: CECC Standard Method for the Specification of Surface Mounting Components (SMDs) of Assessed Quality (National authorized institutions will complete this clause by making reference to any documents or specifications directly referred to in their national equivalent of this standard.)
1) The name of the national standards organization under whose authority the detail specification is published and, if applicable, the organization from which the detail specification is available. (2) The IECQ symbol and the number allotted to the completed detail specification by the IECQ secretariat. (3) The number and the year of availability of the IEC standard concerning test and measurement procedures for electromechanical all-or-nothing relays and/or sectional specification; also national reference, if different. (4) If different from the IECQ number, the national number of the detail specification, date of issue and any further information required by the national system, together with any amendment numbers.(5) Type: monostable or bistable, non-polarized or polarized, two change-over contacts. (6) Construction: sizes, for example dual-in-line, base and overall height, type of relay, based upon environmental protection (RT III), mounting variants and other typical construction details. (7) An outline drawing with main dimensions which are of importance for interchangeability, and/or reference to the appropriate national or international document for outlines. Alternatively, this drawing may be given in an annex to the detail specification, but (7) should always contain an illustration of the general outer appearance of the component. Location and dimensions of stand-offs (maximum relay height shall include stand- offs), position of terminal No. 1 relative to the outside shape, acceptable offset of the tip of a terminal relative to the nominal grid position, indication of the area on the top of the relay housing to enable automatic mounting using aspirators, suitable hole diameter for assembling on printed circuit board. (8) Typical field of applications. (9) Available rated coil voltages and rated power. (10) Available contact arrangements, defined special contact materials and contact voltage, current and power. The respective code digit for contact materials shall be listed in an annex, if applicable.