Infoteenus
Uued standardid
This document requires the assessment of hazard level at each accessible location of the OFCS as a replacement for product classification according to IEC 60825-1. It applies to the installed OFCS as an engineered, end-to-end assembly for the generation, transfer and receipt of optical radiation arising from lasers, light-emitting diodes (LEDs) or optical amplifiers, in which the transference is by means of optical fibre for communication and/or control purposes.
NOTE 1 Throughout this document, a reference to 'laser' is taken to include LEDs and optical amplifiers.
Individual components and subassemblies that fall under the definition of a laser product are subject to the applicable subclause(s) of IEC 60825-1. This document is applicable to individual components and subassemblies intended to be installed within OFCSs.
This document does not apply to optical fibre systems primarily designed to transmit optical power for applications such as material processing or medical treatment.
In addition to the hazards resulting from laser radiation, OFCSs possibly give rise to other hazards, such as fire.
This document does not address safety issues associated with explosion or fire with respect to OFCSs deployed in explosive atmospheres.
NOTE 2 The hazard presented by optical radiation emerging from a fibre is determined by the wavelength and power emerging from the fibre and also by the optical characteristics of the fibre itself (see Annex A).
If tests are performed on the connectors terminated as pigtails or patchcords for category OP+HP, and the product pass, the product will be automatically qualified or categorized as meeting the IEC standard for categories OP+, OP, OPHD, C and CHD.
IEC 61000-6-3 applies only if no relevant dedicated product or product family EMC emission standard has been published. This part of IEC 61000 for emission requirements applies to electrical and electronic equipment intended for use at residential locations. It also applies to electrical and electronic equipment intended for use at other locations that do not fall within the scope of IEC 61000-6-8 or IEC 61000-6-4.
The intention is that all equipment used in the residential, commercial and light-industrial locations are covered by IEC 61000-6-3 or IEC 61000-6-8. If there is any doubt the requirements in IEC 61000-6-3 apply. Equipment that has a radio function are also included in the scope of this standard. However, the emission requirements are not intended to be applied to the intentional transmissions from these radio transmitters, their harmonics and their out of band emissions. Not all disturbance phenomena have been included for testing purposes but only those considered relevant for the equipment intended to operate within the locations included within IEC 61000-6-3.
The objectives of IEC 61000-6-3 are:
— to establish requirements that provide an adequate level of protection of radio reception in the frequency range 9 kHz to 400 GHz,
— to establish requirements that provide an adequate level of protection against conducted and radiated electromagnetic disturbances emitted by equipment in the scope of this document,
— to support the reproducibility of measurement and the repeatability of results.
This edition includes some significant technical changes:
a) the addition of magnetic field emission requirements, including the measurement of WPT function,
b) the extension of low-voltage AC mains power requirements to cover the range 9 kHz to 150 kHz,
c) products with a radio function have been added to the scope,
d) limits in a FAR for rack mounted equipment have been added.
a) addition of provisions for rectangular ferrule connectors;
b) additions of terms and definitions;
c) update of the fibre naming conventions in accordance with IEC 60793-2-10;
d) update of test severities in accordance with IEC 61753‑1;
e) addition of the torsion test;
f) reduction of the duration of the fibre/cable retention test on reinforced cables from 120 s to 60 s minimum;
g) deletion of the static side load test;
h) update of the flexing of the strain relief test to use the change in attenuation instead of the transient loss;
i) reduction of the number of mating durability cycles for cylindrical ferrule connectors from 500 cycles to 200 cycles;
j) addition of the mating durability for rectangular ferrule connectors with 50 cycles;
k) addition of Annex B for visual examination of the outer cable sheath movement of reinforced cables as an additional requirement for change of temperature, cable retention and flexing of the strain relief tests.
The test procedures described in this document simulate conditions that the component can encounter during its service lifetime to check the following performance characteristics:
- capability of an optical mechanical splice to be reinstalled after being disassembled;
- capability to reintroduce fibre management systems and protective housings, accessing fibres and optical components and making reconfigurations without disturbing transmission in adjacent fibre circuits;
- sealing performance of the protective housing after frequent opening and closing operations;
- sealing performance of the hardened connector after frequent mating and demating operations.
This fourth edition cancels and replaces the third edition published in 2012. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) update of the terms and definitions according to IEC 61753-1:2018 and IEC 61756‑1:2019;
b) update of the test severities according to the new edition of IEC 61753-1:2018;
c) addition of procedure D to verify the sealing performance after frequent mating and demating of a hardened connector.
transmitter network planning, known as the Single Frequency Network (SFN) and the gap-filling technique. The DAB system meets the required sharing criteria with other radiocommunication services.
The present document defines the DAB transmission signal. It includes the coding algorithms for multiplexing of audio and video programmes and data services, channel coding and modulation. Provision is also made for transmission of additional data services which may be programme related or not, within the limit of the total system capacity. The present document provides information on the system configuration which includes information about the ensembles,
services, service components and linking of them.
The present document describes the nominal characteristics of the emitted DAB signal. The aspects related to the
receiver design are outside the scope of the present document.
Asendatud standardid
Standardi IEC 61000 see, emissiooni nõudeid käsitlev osa kehtib elektri- ja elektroonikaseadmete kohta, mis on ette nähtud kasutamiseks elamupiirkonnas (vt 3.1.14). Standardi IEC 61000 see osa kehtib ka elektri- ja elektroonikaseadmete kohta, mida kasutatakse muudes, standardi IEC 61000-6-8 või IEC 61000-6-4 käsitlusalasse mittekuuluvates asukohtades.
Eesmärk on see, et kõik elamupiirkonnas, kaubandus- ja väiketööstuskeskkondades kasutatavad seadmed oleksid hõlmatud standardiga IEC 61000-6-3 või IEC 61000-6-8. Mis tahes kahtluse korral kehtivad standardi
IEC 61000-6-3 nõuded.
Kiirgusemissiooni ja juhtivusliku kiirguse nõudeid sagedusalas kuni 400 GHz peetakse oluliseks ning need on välja valitud, et tagada raadiovastuvõtu piisav kaitse sätestatud elektromagnetilises keskkonnas. Selles standardis esitatud katsetamisnõuetes pole arvestatud mitte kõiki häiringunähtusi, vaid ainult neid, mida peetakse oluliseks seadmetele, mis on mõeldud töötama selles dokumendis loetletud kohtades.
Selles dokumendis käsitletavad emissiooni nõuded pole ette nähtud kohaldamiseks tahtlike edastuste ja nende harmooniliste suhtes raadiosaatjalt, nagu on määratlenud ITU.
MÄRKUS 1 Dokument ei hõlma ohutuskaalutlusi.
MÄRKUS 2 Erijuhtumeil võivad tekkida olukorrad, mil dokumendis sätestatud emissioonipiirangud ei taga adekvaatset kaitset, nt tundliku vastuvõtja kasutamisel mingi seadme lähedal. Neil juhtudel on võimalik kasutada spetsiaalseid häiringuvähendusvõtteid.
MÄRKUS 3 See dokument ei hõlma seadmete rikketingimustes tekkinud häiringuid.
MÄRKUS 4 Kuna dokumendi nõuded on rangemad või samaväärsed kui standardites IEC 61000-6-4 ja
IEC 61000-6-8 sätestatud nõuded, täidavad seadmed, mis vastavad standardi nõuetele, ühtlasi standardite
IEC 61000-6-4 ja IEC 61000-6-8 nõudeid.