IEC 62420 pdf – Concentric lay stranded overhead electrical conductors containing one or more gap(s)
IEC 62420 pdf – Concentric lay stranded overhead electrical conductors containing one or more gap(s) 1 scope This International Standard specifies the electrical and mechanical characteristics ofconcentric lay stranded overhead electrical conductors，containing one or more self-supporting aluminium or aluminium alloy layer(s) as depicted in Figure 1, made ofcombinations of any of the following metal wires: a) hard-drawn aluminium as per...
IEC 62423 pdf – Type F and type B residual current operated circuit-breakers with and without integral overcurrent protection for household and similar uses
IEC 62423 pdf – Type F and type B residual current operated circuit-breakers with and without integral overcurrent protection for household and similar uses 1 Scope The scope of lEC 61008-1 and lEC 61009-1 applies with the following additions. This standard specifies requirements and tests for Type F and Type B RCDs (ResidualCurrent Devices). Requirements and tests given in this...
IEC 62428 pdf – Electric power engineering – Modal components in three-phase a.c. systems – Quantities and transformations
IEC 62428 pdf – Electric power engineering – Modal components in three-phase a.c. systems – Quantities and transformations This International Standard deals with transformations from original quantities into modalquantities for the widely used three-phase a.c. systems in the field of electric powerengineering. The examination of operating conditions and transient phenomena in three-phase a.c.systems becomes more difficult by the resistive,inductive or...
IEC 62431 pdf – Reflectivity of electromagnetic wave absorbers in millimetre wave frequency – Measurement methods
IEC 62431 pdf – Reflectivity of electromagnetic wave absorbers in millimetre wave frequency – Measurement methods This International Standard specifies the measurement methods for the reflectivity ofelectromagnetic wave absorbers (EMA) for the normal incident, oblique incident and eachpolarized wave in the millimetre-wave range. In addition，these methods are also equallyeffective for the reflectivity measurement of other materials: measurement frequency range: 30...
IEC 62435-3 pdf – Electronic components – Long-term storage of electronic semiconductor devices – Part 3: Data
IEC 62435-3 pdf – Electronic components – Long-term storage of electronic semiconductor devices – Part 3: Data The data archive is generally stored on any medium, which may include non-volatile memory, optical disk or storage in redundant array disk servers. It is important to ensure the environment for media storage is low risk for degradation, and accidental or random events...
IEC 62438 pdf – Radiation protection instrumentation – Mobile instrumentation for the measurement of photon and neutron radiation in the environment
IEC 62438 pdf – Radiation protection instrumentation – Mobile instrumentation for the measurement of photon and neutron radiation in the environment IEC 62534,Radiation protection instrumentation – Highly sensitive hand-held instruments forneutron detection of radioactive material1 Iso 4037 (all parts)，x and gamma reference radiation for calibrating dosemeters anddoserate meters and for determining their response as a function of photon energy Iso...
IEC 62440 pdf – Electric cables with a rated voltage not exceeding 450/750 V – Guide to use
IEC 62440 pdf – Electric cables with a rated voltage not exceeding 450/750 V – Guide to use 1scope This International Standard provides general guidance for the safe use of electric cables with arated voltage not exceeding 450/750 v. lt is applicable to those cables that are specified inIEC 60227 and lEC 60245. The guidance given in this standard can...
IEC 62460 pdf – Temperature – Electromotive force (EMF) tables for pure-element thermocouple combinations
IEC 62460 pdf – Temperature – Electromotive force (EMF) tables for pure-element thermocouple combinations This International Standard specifies the equations and reference tables relating temperatureto EMF(electro-motive force) for Gold versus Platinum and Platinum versus Palladiumthermocouples. For information and convenience of use it also provides the approximateequations for temperature as functions of EMF. The tables and equations in this standard are...
IEC 62491 pdf – Industrial systems, installations and equipment and industrial products – Labelling of cables and cores
IEC 62491 pdf – Industrial systems, installations and equipment and industrial products – Labelling of cables and cores 1 Scope This standard provides rules and guidelines for the labelling of cables and cores/conductorsused in industrial installations,equipment and products，in order to maintain a clear relationbetween the technical documentation and the actual equipment and for other purposes.Thefollowing methods are described and designated:...
IEC 62499 pdf – Railway applications – Current collection systems – Pantographs, testing methods for carbon contact strips
IEC 62499 pdf – Railway applications – Current collection systems – Pantographs, testing methods for carbon contact strips 5.2.4.2.2 Test at specified temperature Test specimens shall be prepared in accordance with 5.2.4.2.1 . Specimens shall be cooled / heated to –40 °C, 1 00 °C, 200 °C, 250 °C and the steady state temperature recorded in test 5.2.1 whether it...