Elektrotechnika

Oblast zaměření: Světelné zdroje a svítidla
Komise : IEC/SC 34A (Lamps)
Původce: ISO\IEC\CEN\CENELEC
K připomínkám do: 6.06.2018
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This document establishes specification sheet requirements for light emitting diode (LED) packages designed for the emission of white light for general lighting applications.

This document does not contain compliance criteria.

Komise : IEC/SC 61C (Safety of refrigeration appliances for household and commercial use)
Původce: ISO\IEC\CEN\CENELEC
K připomínkám do: 13.06.2018
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This clause of Part 1 is replaced by the following.

This International Standard specifies safety requirements for electrically operated commercial refrigerating appliances that have an incorporated motor-compressor or that are supplied in two units for assembly as a single appliance in accordance with the manufacturer’s instructions (split system).

NOTE 101 Examples of appliances that are within the scope of this standard are

refrigerated display and storage cabinets;

refrigerated trolley cabinets;

service counters and self-service counters;

blast chillers and blast freezers;

< >.NOTE 102 Attention is drawn to the fact that

 

for appliances intended to be used in vehicles or on board ships or aircraft, additional requirements may be necessary;

in many countries, additional requirements are specified by national health authorities, the national authorities responsible for the protection of labour, the national water supply authorities and similar authorities.

NOTE 103 This standard does not apply to

domestic refrigerating appliances (IEC 60335-2-24)

industrial refrigerating systems;

motor-compressors (IEC 60335-2-34);

commercial dispensing appliances and vending machines (IEC 60335-2-75);

commercial ice-cream appliances;

cold temperature rooms;

multiple refrigerated chambers with a remote motor-compressor;

Oblast zaměření: Světelné zdroje a svítidla
Komise : IEC/SC 34B (Lamp caps and holders)
Původce: ISO\IEC\CEN\CENELEC
K připomínkám do: 13.06.2018
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Amendment 56 - Lamp caps and holders together with gauges for the control of interchangeability and safety - Part 3: Gauges

Oblast zaměření: Světelné zdroje a svítidla
Komise : IEC/SC 34B (Lamp caps and holders)
Původce: ISO\IEC\CEN\CENELEC
K připomínkám do: 13.06.2018
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Amendment 59 - Lamp caps and holders together with gauges for the control of interchangeability and safety - Part 1: Lamps Caps

Komise : IEC/SC 17A (High-voltage switchgear and controlgear)
Původce: ISO\IEC\CEN\CENELEC
K připomínkám do: 13.06.2018
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This part of IEC 62271 applies to three-pole-operated fused circuit-switchers designed with rated voltages above 1 kV up to and including 52 kV for use on three-phase alternating current systems of either 50 Hz or 60 Hz.

They may be designed either as stand-alone devices, or be embedded in some switchgear and controlgear assembly.

They are intended to be used for circuits or applications requiring only a normal mechanical and electrical endurance capability. Such applications cover protection of HV/LV transformers for instance, but exclude distribution lines or cables, as well as motor circuits and capacitor bank circuits.

Short-circuit conditions with low currents, up to the fused circuit-switcher rated take-over current, are dealt with by supplementary devices (strikers, relays, etc.), properly arranged, tripping the circuit-switcher. Current-limiting fuses are incorporated in order to ensure that the short-circuit breaking capacity of the device is above that of the circuit-switcher alone.

NOTE 1 In this standard the term "fuse" is used to designate either the fuse or the fuse-link where the general meaning of the text does not result in ambiguity.

 NOTE 2 Other circuit-switchers exist; see reference [1][1].

Devices that require a dependent manual operation are not covered by this standard.

 

[1]   Numbers between square brackets refer to Bibliography.

Oblast zaměření: Elektrická trakční zařízení
Komise : IEC/TC 9 (Electrical equipment and systems for railways)
Původce: ISO\IEC\CEN\CENELEC
K připomínkám do: 13.06.2018
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The scope of this document is limited to apparatus, systems and fixed installations which are intended for use in the railway environment. The frequency range covered is 0 Hz to 300 GHz.

 

Technical considerations and measurements are specified for frequencies up to 20 kHz because no relevant field strengths are expected above due to the physical nature of
EMF-sources in the railway environment.

 

The object of this document is to provide measurement and calculation procedures of electric and magnetic field levels generated by electronic and electrical apparatus in the railway environment with respect to human exposure.

 

The regulations regarding the protection of human being during exposure to non-ionizing electromagnetic fields in the railway environment are different within the countries worldwide. This document offers a procedure regarding measurement, simulation and evaluation.

 

The measurement procedures and points of measurement cover also the aspect of persons bearing active implantable medical devices.

 

NOTE 1   Not covered is the risk assessment for persons bearing active implants in magnetic field generated by electronic and electrical apparatus in the railway environment.

 

Not covered are personal electronic devices (e.g. mobile phones, laptop computers, wireless communication systems etc.) of passengers and workers.

 

Not covered are intentional transmitters with frequencies higher than 20 kHz.