{"id":238835,"date":"2024-10-19T15:36:41","date_gmt":"2024-10-19T15:36:41","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-61810-22011\/"},"modified":"2024-10-25T10:18:09","modified_gmt":"2024-10-25T10:18:09","slug":"bs-en-61810-22011","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-61810-22011\/","title":{"rendered":"BS EN 61810-2:2011"},"content":{"rendered":"

This part of IEC 61810 covers test conditions and provisions for the evaluation of endurance tests using appropriate statistical methods to obtain reliability characteristics for relays. It should be used in conjunction with IEC 61649.<\/p>\n

This International Standard applies to electromechanical elementary relays considered as non-repaired items (i.e. items which are not repaired after failure), whenever a random sample of items is subjected to a test of cycles to failure (CTF).<\/p>\n

The lifetime of a relay is usually expressed in number of cycles. Therefore, whenever the terms \u201ctime\u201d or \u201cduration\u201d are used in IEC 61649, this term should be understood to mean \u201ccycles\u201d. However, with a given frequency of operation, the number of cycles can be transformed into respective times (e.g. times to failure (TTF)).<\/p>\n

The failure criteria and the resulting characteristics of elementary relays describing their reliability in normal use are specified in this standard. A relay failure occurs when the specified failure criteria are met.<\/p>\n

As the failure rate for elementary relays cannot be considered as constant, particularly due to wear-out mechanisms, the times to failure of tested items typically show a Weibull distribution. This standard provides both numerical and graphical methods to calculate approximate values for the two-parameter Weibull distribution, as well as lower confidence limits.<\/p>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
6<\/td>\nEnglish
\n
CONTENTS <\/td>\n<\/tr>\n
7<\/td>\nINTRODUCTION <\/td>\n<\/tr>\n
8<\/td>\n1 Scope
2 Normative references <\/td>\n<\/tr>\n
9<\/td>\n3 Terms and definitions <\/td>\n<\/tr>\n
11<\/td>\n4 General considerations <\/td>\n<\/tr>\n
12<\/td>\n5 Test conditions
5.1 Test items
5.2 Environmental conditions
5.3 Operating conditions <\/td>\n<\/tr>\n
13<\/td>\n5.4 Test equipment
6 Failure criteria
7 Output data
8 Analysis of output data <\/td>\n<\/tr>\n
14<\/td>\n9 Presentation of reliability measures <\/td>\n<\/tr>\n
15<\/td>\nAnnex\u00a0A (normative)Data analysis <\/td>\n<\/tr>\n
18<\/td>\nFigures
\n
Figure A.1 \u2013 An example of Weibull probability paper <\/td>\n<\/tr>\n
20<\/td>\nFigure A.2 \u2013 An example of cumulative hazard plotting paper
Figure A.3 \u2013 Plotting of data points and drawing of a straight line <\/td>\n<\/tr>\n
21<\/td>\nFigure A.4 \u2013 Estimation of distribution parameters <\/td>\n<\/tr>\n
24<\/td>\nAnnex\u00a0B (informative)Example of numerical and graphical Weibull analysis <\/td>\n<\/tr>\n
25<\/td>\nTables
\n
Table B.1 \u2013 Ranked failure data <\/td>\n<\/tr>\n
26<\/td>\nFigure B.1 \u2013 Weibull probability chart for the example <\/td>\n<\/tr>\n
28<\/td>\nAnnex\u00a0C (informative)Example of cumulative hazard plot
Table C.1 \u2013 Work sheet for cumulative hazard analysis <\/td>\n<\/tr>\n
30<\/td>\nFigure C.1 \u2013 Estimation of distribution parameters <\/td>\n<\/tr>\n
31<\/td>\nTable C.2 \u2013 Example work sheet <\/td>\n<\/tr>\n
32<\/td>\nFigure C.2 \u2013 Cumulative hazard plots <\/td>\n<\/tr>\n
34<\/td>\nAnnex\u00a0D (informative)Gamma function
Table D.1 \u2013 Values of the gamma function <\/td>\n<\/tr>\n
35<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Electromechanical elementary relays – Reliability<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2011<\/td>\n38<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":238840,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[512,2641],"product_tag":[],"class_list":{"0":"post-238835","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-29-120-70","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/238835","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/238840"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=238835"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=238835"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=238835"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}