Calculation of load capacity of spur and helical gears — Part 2: Calculation of surface durability (...
This document specifies the fundamental formulae for use in the determination of the surface load capacity of cylindrical gears with involute external or internal teeth. It includes formulae for all influences on surface durability for which quantitative assessments can be made. It applies primarily to oil‑lubricated transmissions, but can also be used to obtain approximate values for (slow‑…
Calculation of load capacity of spur and helical gears — Part 3: Calculation of tooth bending streng...
This document specifies the fundamental formulae for use in tooth bending stress calculations for involute external or internal spur and helical gears with a rim thickness sR > 0,5 ht for external gears and sR > 1,75 mn for internal gears. In service, internal gears can experience failure modes other than tooth bending fatigue, i.e. fractures starting at the root diameter and progressing…
Railway applications - Electric equipment for rolling stock - Part 3: Electrotechnical components - ...
IEC 60077-3:2019 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition.
IEC 60077-3:2019 gives the rules for circuit-breakers, the main contacts of which are connected to DC power and/or…
Railway applications - Electric equipment for rolling stock - Part 4: Electrotechnical components - ...
IEC 60077-4:2019 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition.
IEC 60077-4:2019 gives rules for AC circuit-breakers, the main contacts of which are connected to AC overhead contact…
Installation couplers intended for permanent connection in fixed installations
IEC 61535:2019 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition.
IEC 61535:2019 applies to two-wire, up to five-wire installation couplers, including earth, if provided, with a rated…
Identification cards — Test methods — Part 3: Integrated circuit cards with contacts and related int...
1 Scope
This document defines test methods for characteristics of integrated circuit cards with contacts and related interface devices according to the definition given in ISO/IEC 7816-3. Each test method is cross-referenced to one or more base standards, which can be ISO/IEC 7810 that defines the information storage technologies employed in identification card applications.
NOTE Criteria for…
Identification cards — Recording technique — Part 7: Magnetic stripe: High coercivity, high density
1 Scope
This document is one of a series of standards describing the characteristics for identification cards as defined in the definitions clause and the use of such cards for international interchange.
This document specifies requirements for a high coercivity magnetic stripe (including any protective overlay) on an identification card and encoding technique. It takes into consideration both…
Soil quality — Characterization of soil with respect to human exposure
This document provides guidance on the type and extent of soil characterization necessary for the evaluation of human exposure to substances present in possibly leading to adverse effects.
It does not provide guidance on:
— the design or selection of numerical models that can be used to estimate exposure;
— potential exposure to radioactivity, pathogens or asbestos in soil.
Background…
Systems and software engineering — Requirements for acquirers and suppliers of information for users
1 Scope
This document supports the interest of system users in having consistent, complete, accurate, and usable
information. It addresses both available approaches to standardization: a) process standards, which
specify the way that information products are to be acquired and supplied; and b) information product
standards, which specify the characteristics and functional requirements of the…
Low-voltage switchgear and controlgear - Part 5-4: Control circuit devices and switching elements - ...
IEC 60947-5-4:2002+A1:2019 applies to separable contacts used in the utilization area considered, such as switching elements for control circuits. This standard takes into consideration two rated voltage areas:
a) above (and including) 10 V (typically 24 V) where contacts are used for switching loads with possible electrical erosion, such as programmable controller inputs;
b) below 10 V (…
