Rotating electrical machines - Part 25: AC electrical machines used in power drive systems - Applica...
IEC TS 60034-25:2022 CMV contains both the official standard and its commented version. The commented version provides you with a quick and easy way to compare all the changes between IEC TS 60034-25:2022 edition 4.0 and the previous IEC TS 60034-25:2014 edition 3.0. Furthermore, comments from IEC TC 2 experts are provided to explain the reasons of the most relevant changes, or to clarify any…
Plastics — Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of thermop...
This document specifies two procedures for the determination of the melt mass-flow rate (MFR) and the melt volume-flow rate (MVR) of thermoplastic materials under specified conditions of temperature and load. Procedure A is a mass-measurement method. Procedure B is a displacement-measurement method. Normally, the test conditions for measurement of melt flow rate are specified in the material…
Bamboo structures — Engineered bamboo products — Test methods for determination of physical and mech...
This document specifies test methods suitable for determining the following mechanical properties of engineered bamboo products:
a) modulus of elasticity in bending;
b) shear modulus;
c) bending strength;
d) modulus of elasticity in tension parallel to the fibre;
e) tension strength parallel to the fibre;
f) modulus of elasticity in compression parallel to the fibre;
g) compression strength…
High-voltage switchgear and controlgear - Part 202: AC prefabricated substations for rated voltages ...
IEC 62271-202:2022 specifies the service conditions, rated characteristics, general structural requirements and test methods of enclosed high-voltage prefabricated substations. These prefabricated substations are cable-connected to AC high-voltage networks with an operating voltage up to and including 52 kV and power frequencies up to and including 60 Hz. They can be manually operated from inside…
Metallic materials — High strain rate torsion test at room temperature
This document specifies terms and definitions, symbols and designations, principle, apparatus, test piece, procedure, data processing, evaluation of test result, test report and other contents for the torsion test at high strain rates for metallic materials by using torsional split Hopkinson bar (TSHB).
Electricity metering - Payment systems - Part 31: Particular requirements - Static payment meters fo...
IEC 62055-31:2022 applies to newly manufactured, static watt-hour payment meters of accuracy classes 0,5, 1 and 2 for direct connection, for the measurement of alternating current electrical energy consumption of a frequency in the range 45 Hz to 65 Hz that include a supply control switch for the purpose of interruption or restoration of the electricity supply to the load in accordance with the…
Electricity metering - Payment systems - Part 31: Particular requirements - Static payment meters fo...
IEC 62055-31:2022 CMV contains both the official standard and its commented version. The commented version provides you with a quick and easy way to compare all the changes between IEC 62055-31:2022 edition 2.0 and the previous IEC 62055-31:2005 edition 1.0. Furthermore, comments from IEC TC 13 experts are provided to explain the reasons of the most relevant changes, or to clarify any part of the…
Optical fibres - Part 1-1: Measurement methods and test procedures - General and guidance
IEC 60793-1-1:2022 is available as IEC 60793-1-1:2022 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 60793-1-1:2022 lists and gives guidance on the use of documents giving uniform requirements for measuring and testing optical fibres, thereby assisting in the inspection of fibres and…
Optical fibres - Part 1-1: Measurement methods and test procedures - General and guidance
IEC 60793-1-1:2022 is available as IEC 60793-1-1:2022 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 60793-1-1:2022 lists and gives guidance on the use of documents giving uniform requirements for measuring and testing optical fibres, thereby assisting in the inspection of fibres and…
Rubber compounding ingredients — Carbon black — Determination of sulfur content
This document specifies two methods for the determination of the total sulfur in all types of carbon black for use in the rubber industry:
— Method A, using a combustion furnace;
— Method B, using an automatic analyser.
With respect to safety aspects and test precision, it is preferable to use automatic systems. Method B is therefore the preferred method. Classical chemical analysis (Method…
