Cart (0)
  • No items in cart.
Total
$0
There is a technical issue about last added item. You can click "Report to us" button to let us know and we resolve the issue and return back to you or you can continue without last item via click to continue button.
Home
Content
Tour
eLibrary
Store
Search book title
Enter keywords for book title search
Search book content
Enter keywords for book content search
Filters:
FORMAT
BOOKS
All Books
PACKAGES
All Packages
EDITION
to
PUBLISHER
AABC
(1)
AAMI
(326)
ACI
(573)
AISC
(44)
ASA
(234)
ASCE
(982)
ASHRAE
(652)
ASME
(2114)
ASSE
(64)
ASTM
(92448)
AWC
(54)
AWWA
(547)
BHMA
(124)
BICSI
(33)
BIFMA
(21)
BOMA
(20)
BSI
(93277)
CHD
(3)
CRSI
(17)
IAHSS
(1)
IAPMO
(351)
ICC
(306)
IEEE
(6217)
IES
(240)
ISEA
(16)
Joint Commission
(177)
Joint Commission Int.
(1)
NETA
(5)
NFPA
(1635)
TCNA
(16)
TMS
(19)
USGBC
(28)
WILEY
(4)
 
AR
(6)
AZ
(7)
CA
(115)
CT
(3)
FL
(57)
ID
(5)
IL
(5)
IN
(1)
KY
(1)
LA
(2)
MI
(25)
MN
(27)
NC
(27)
NJ
(13)
NY
(61)
OH
(24)
OR
(22)
PA
(7)
RI
(8)
SC
(20)
SD
(1)
TX
(3)
VA
(50)
VT
(6)
WA
(31)
CONTENT TYPE
 Act
 Admin Code
 Announcements
 Bill
 Book
 CADD File
 CAN
 CEU
 Charter
 Checklist
 City Code
 Code
 Commentary
 Comprehensive Plan
 Conference Paper
 County Code
 Course
 DHS Documents
 Document
 Errata
 Executive Regulation
 Federal Guideline
 Firm Content
 Guideline
 Handbook
 Interpretation
 Journal
 Land Use and Development
 Law
 Legislative Rule
 Local Amendment
 Local Code
 Local Document
 Local Regulation
 Local Standards
 Manual
 Model Code
 Model Standard
 Notice
 Ordinance
 Other
 Paperback
 PASS
 Periodicals
 PIN
 Plan
 Policy
 Product
 Product - Data Sheet
 Program
 Provisions
 Requirements
 Revisions
 Rules & Regulations
 Standards
 State Amendment
 State Code
 State Manual
 State Plan
 State Standards
 Statute
 Study Guide
 Supplement
 Sustainability
 Technical Bulletin
 All
  • BSI
    BS EN 61810-2:2017 Electromechanical elementary relays - Reliability
    Edition: 2017
    $473.45
    / user per year

Description of BS EN 61810-2:2017 2017

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.

This document applies to electromechanical elementary relays considered as non-repaired items (i.e. items which are not repaired after failure).

The lifetime of a relay is usually expressed in number of cycles (CTF). Therefore, whenever the terms “time” or “duration” are used in IEC 61649 , they carry the meaning “cycles”. However, with a given frequency of operation, the number of cycles can be transformed into respective times (e.g. times to failure (TTF)).

The failure criteria and the resulting characteristics of elementary relays describing their reliability in normal use are specified in this document. A relay failure occurs when the specified failure criteria are met.

As the failure rate for elementary relays cannot be considered as constant, particularly due to wear-out mechanisms, the cycles to failure of tested items typically show a Weibull distribution. This document provides numerical and graphical methods to calculate approximate values for the two-parameter Weibull distribution, as well as lower confidence limits and a method for confirmation of reliability values with the WeiBayes method.

This document does not cover procedures for electromechanical elementary relays where enhanced requirements for the verification of reliability apply.

NOTE 1

Such reliability test procedures are specified in IEC 61810‑2‑1 . In particular, when electromechanical elementary relays are intended to be incorporated in safety-related control systems of machinery in accordance with IEC 62061 and ISO 13849‑1 , IEC 61810‑2‑1 defines procedures for the manufacturer to provide B 10D values.

NOTE 2

Electromechanical elementary relays with forcibly guided (mechanically linked) contacts according to IEC 61810‑3 offer the possibility of a high diagnostic coverage according to 4.5.3 of ISO 13849‑1:2015 .



Standard NumberBS EN 61810-2:2017
TitleElectromechanical elementary relays - Reliability
StatusDefinitive
Publication Date2017-10-24
ReplacesBS EN 61810-2:2011
Identical National Standard OfEN 61810-2:2017, CLC/TR 62258-4:2007, IEC 61810-2:2017
DescriptorsSwitchgear, Performance testing, Relays, Endurance testing, Making capacity, Statistical methods of analysis, All-or-nothing relays, Electrical testing, Testing conditions, Reliability, Circuits, Failure (mechanical), Classification systems, Data processing, Test equipment, Switches, Analysis, Ratings
ICS29.120.70 Relays
CommitteeW/-
ISBN978 0 580 87822 0
PublisherBSI
Pages48

The following editions for this book are also available...

Format Year Publisher Type Title Annual Price
2020
BSI
Standards
 $617.54 Buy

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
GROUPS
X