IEC 61811-54 pdf download

IEC 61811-54 pdf download

IEC 61811-54 pdf download.Electromechanical all-or-nothing relays
(1) The name of the national standards organization under whose authority the detail specifi- cation is published and, if applicable, the organization from whom 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, number and types of contacts. (6) Construction: sizes, for example dual-in-line, base and overall height, type of relay, based upon environmental protection (RT I to RT IV), 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. (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. (11) Component climatic category according to clause 8 and annex A of IEC 60068-1, and temperature range.
The coding of the monostable or bistable relay type shall be combined with the rated power of the coil, if applicable. The reference to the number and types of contacts shall be given on the front page of the specification. Use code 0 as the last digit if no special attributes apply. If one of the attributes in the example for a detail specification shall not be considered, the corresponding code number or letter shall be deleted; there shall be no special marks or open space for non-applicable attributes. The manufacturer may use his own numbering system, provided that a conversion list with the IECQ type designations and the manufacturer’s part numbers is given in an annex to the detail specification.
2.4 Contact data
2.4.1 Electrical endurance and switching frequency Contact failure: contact-circuit resistance of a closed contact higher than the value stated in 2.4.2, or resistance of an open contact circuit lower than 100 kΩ, both more than once per 10 5 cycles or for the minimum number of switching cycles stated, calculated for each single contact; or a contact fault due to non-opening with a short circuit between break and make contact (resistance value lower than 100 Ω), i.e. one contact fault is permissible for 100 000 switching cycles and seven contact faults are permissible for 700 000 switching cycles. Example: at a given endurance of 10 6 operations the total number of faults, as described above, shall not exceed 10.
4 Quality conformance inspection
Quality conformance inspection contains the tests stated in table 4: – groups A and B: lot-by-lot tests; – group C: periodic tests. Unless otherwise stated in this blank detail specification, all tests of table 4 are mandatory. Where a subgroup contains cumulative tests, the order of the tests is mandatory. Specimens subjected to tests denoted as destructive (D) shall not be released for delivery. NOTE If a special level of AQL is required, the AQL value regarding subgroups A4, B1 and B2 in table 4 should be provided between the manufacturer and user of a relay. 4.1 Formation of inspection lots According to 3.2.3 of QC 001002-3, the basis for determination of sample size for the quality conformance inspection is the relay quantity produced during one week. 4.2 Intervals between tests – Subgroups A4, B1 and B2: minimum once a week. – Subgroups C1 and C2: at least once a year. – Subgroups C4 to C6: at least once every two years.

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