Normy

Obsah

ČSN EN IEC 61784-5-19 ed. 2 This part of IEC 61784-5 specifies the installation profile for CPF 19 (MECHATROLINK). The installation profiles are specified in the annexes. These annexes are read in conjunction with IEC 61918:2018, IEC 61918:2018/AMD1:2022 and IEC 61918:2018/AMD2:2024.

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ČSN EN 15328+A1 Tento dokument stanoví požadavky na brzdové destičky pro kotoučové brzdy železničních vozidel. Definuje požadavky a obecné programy zkoušek brzdových destiček na dynamometru. Nepokrývá povinné zkoušky ověření brzdných drah nad rámec zkoušek v laboratoři, na zkušebním stavu a za provozu. S cílem ohodnotit výkonnost brzdových destiček podle klasifikace norma udává pevné hod-noty parametrů jako kategorie definované v klasifikačním schématu. Dokument nelze využít pro vozi-dla městské kolejové dopravy

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ČSN EN 12665 (36 0001) This document defines basic terms and definitions for use in all lighting applications. This document also sets out a framework for the specification of lighting requirements, giving details of aspects that are to be considered when setting those requirements.

Obsah

ČSN ETSI EN 301 908-3 V15.1.1 The present document specifies technical characteristics and methods of measurements for types of radio equipment: - Base Stations for IMT 2000 CDMA Direct Spread (UTRA FDD). These radio equipment types are capable of operating in whole or any part of the operating band(s) given in table 1-1. The present document covers conducted requirements for UTRA Base Stations for 3GPP Release 15. Additionally, it includes requirements for selected operating bands from 3GPP Releases 16 and 17. NOTE - The relationship between the present document and essential requirements of article 3.2 of Directive 2014/53/EU [i.2] is given in annex A.

Obsah

ČSN EN 17952 This document presents Function Analysis (FA) and specifies requirements for Function Analysis and its deliverables. It presents the two distinct areas of application, namely, Functional Need Analysis (FNA) relating to understanding the need, setting goals and Technical Function Analysis (TFA) relating to selecting and developing a solution. It specifies requirements for the basic characteristics of the deliverables within FNA and TFA and expands requirements, guidance and recommendations about FA expressed in the Functional Performance Specification Standard (EN 16271) and in the Value Management Standard (EN 12973). This document provides an essential reference and support for any person wishing to improve the efficiency, effectiveness and overall performance of their organization. It aims to support sustainable development in an organization. FA offers an opportunity to enhance skills of people involved. In order to present the conditions for implementation and development of FA deliverables, this document: - introduces the interests and fields of application and presents a variety of situations in which FA is used in support of projects of all types and sizes; - specifies essential conditions for successful FA, including roles and responsibilities of the people involved, monitoring the performance of the FA team, processes for validation and verification and supply of valid and verified deliverables; and - specifies requirements for FA and the basic characteristics of FA deliverables whilst outlining methods, and tools for the realization of the deliverables. FA is progressed using the following: - FNA: support for the process of identifying and understanding the need, defining objectives, and setting the goal to be achieved; - TFA: support for design or research processes and evaluation of solutions; and - Iteratively focusing on the FNA and TFA by revisiting the identified need, balancing capabilities of available technologies, resources and constraints, achieving the most desirable outcome.

Obsah

ČSN EN ISO 14823-1 Tato norma popisuje slovník grafických dat (GDD), respektive systém normalizovaných kódů pro existující dopravní značky a piktogramy používané pro poskytování cestovních a dopravních informací (TTI). Daný systém značení lze využít pro tvorbu zpráv v systémech inteligentních dopravních systémů.

Obsah

ČSN EN 12309-3 Appliances covered by this document include one or a combination of the following: - gas-fired sorption chiller; - gas-fired sorption chiller/heater; - gas-fired sorption heat pump; - hybrids based on gas sorption appliances. This document applies to appliances designed to be used for space heating or cooling or refrigeration with or without heat recovery. This document applies to appliances having flue gas systems of Type B and Type C (according to EN 1749:2020) and to appliances designed for outdoor installations, including Type A. EN 12309 does not apply to air conditioners, it only applies to appliances having: - integral burners under the control of fully automatic burner control systems; - closed system refrigerant circuits in which the refrigerant does not come into direct contact with the water or air to be cooled or heated; - mechanical means to assist transportation of the combustion air and/or the flue gas. The above appliances can have one or more primary or secondary functions (i.e. heat recovery - see definitions in EN 12309-1:2023). In the case of packaged units (consisting of several parts), this document applies only to those designed and supplied as a complete package. The appliances having their condenser cooled by air and by the evaporation of external additional water are not covered by EN 12309. Installations used for heating and/or cooling of industrial processes are not within the scope of EN 12309. All the symbols given in this text are to be used regardless of the language used. This part of EN 12309 specifies the requirements, test methods and conditions for gas-fired sorption appliances for heating and/or cooling with a net heat input not exceeding 70 kW. This part of EN 12309 deals particularly with test protocols and tools to calculate the capacity, the gas utilization efficiency and the electrical power input of the appliance. This data can be used in particular to calculate the seasonal efficiency of the appliance.

Obsah

ČSN EN 17893 This document specifies requirements for the use of flammable refrigerants class A2L, A2 and A3 as defined in ISO 817 with regard to: - design and construction of the refrigerating system (as far as not specified in EN 378 2); - operation; - in all anticipated operational modes and locations; - including continuous idling during standstill; - service, maintenance and decommissioning; - for the investigation and mitigation of risk for thermally insulated means of transport, including: trucks, trailers, tanks, vans (light commercial vehicles), wagons, containers for land transport, small containers, packaging. This document describes an Operational Mode Risk Assessment (OMRA), which uses methods such as Hazard and Operability Analysis (HAZOP), Failure Mode and Effects and Criticality Analysis (FMECA), or Fault Tree Analysis (FTA) or a combination of these methods. The document specifies requirements: - for the validation of possible safety concepts and protective devices within the OMRA process, including charge release tests, simulation, and function tests of the associated protective equipment; - for tests related to the application; - using methodologies to achieve tolerable risk values. Mobile air conditioning systems in cars are covered in ISO 13043 and refrigerated containers conforming to ISO 20854 are excluded. This document could be used for class "B" refrigerants providing the OMRA is adjusted to account for their specific properties.

Obsah

ČSN EN IEC 61643-332 This part of IEC 61643 describes the theory of operation, principles for the selection and application of MOVs to be connected to power lines or telecommunication or signalling circuits, up to 1 000 V AC or 1 500 V DC. These SPCs are designed to protect apparatus or personnel, or both, from high transient voltages. This document applies to MOVs having two electrodes and voltage dependent elements with or without disconnectors. It does not apply to assemblies that include MOVs and their influence on the MOV's characteristics. This standard specifically discusses the zinc-oxide type of MOVs.

Obsah

ČSN EN 14382+A1 (38 6450) This document specifies constructional, functional, testing marking and sizing requirements and documentation of gas safety shut-off devices: - for inlet pressures up to 100 bar and nominal diameters up to DN 400; - for an operating temperature range from -20 °C to +60 °C; which operate with fuel gases of the 1st and 2nd family as defined in EN 437, used in the pressure regulating stations in accordance with EN 12186 or EN 12279, in transmission and distribution networks and also in commercial and industrial installations. "Gas safety shut-off devices" will hereafter be called "SSDs" except in titles. For standard safety shut-off devices when used in pressure regulating stations complying with EN 12186 or EN 12279, Annex ZA lists all applicable Essential Safety Requirements of Directive 2014/68/EU (PED). This document considers the following temperature classes/types of SSDs: - temperature class 1: operating temperature range from -10 °C to 60 °C; - temperature class 2: operating temperature range from -20 °C to 60 °C; - functional class A: SSDs that close when damage to the pressure detecting element occurs or when external power fails and whose re-opening, is possible only manually; - functional class B: SSDs that do not close when damage to the pressure detecting element occurs but provide suitable and reliable protection and whose re-opening, is possible only manually; - type IS: (integral strength type); - type DS: (differential strength type). SSDs complying with the requirements of this document may be declared as "in conformity with EN 14382" and bear the mark "EN 14382". The material and functional requirements specified in this document may be applied to SSDs which use thermal energy or the effects of electrical energy to trip the operation of the closing member. For these SSDs the operational parameters are not specified in this document. The SSD may incorporate a vent limiter, complying with the requirements in Annex J. This standard for some paragraphs and sub clauses makes full reference to EN 334:2019. This document does not apply to: - SSDs upstream from/on/in domestic gas-consuming appliances which are installed downstream of domestic gas meters; - SSDs designed to be incorporated into pressure-regulating devices used in service lines with volumetric flow rate

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ČSN EN 1991-1-2 The methods given in this Eurocode are applicable to buildings and civil engineering works, with a fire load related to the building and its occupancy. EN 1991-1-2 deals with thermal and mechanical actions on structures exposed to fire. It is intended to be used in conjunction with the fire design Parts of EN 1992 to EN 1996 and EN 1999 which give rules for designing structures for fire resistance. EN 1991-1-2 contains thermal actions either nominal or physically based. More data and models for physically based thermal actions are given in annexes. EN 1991-1-2 does not cover the assessment of the damage of a structure after a fire. EN 1991-1-2 does not cover supplementary requirements concerning, for example: - the possible installation and maintenance of sprinkler systems; - conditions on occupancy of building or fire compartment; - the use of approved insulation and coating materials, including their maintenance. In addition to the general assumptions of EN 1990 the following assumptions apply: - the choice of the relevant design fire scenario is made by appropriate qualified and experienced personnel, or is given by the relevant national regulation; - any fire protection measure taken into account in the design will be adequately maintained.

Obsah

ČSN EN 1993-1-5 This document provides rules for structural design of stiffened and unstiffened nominally flat plates which are subject to in-plane forces. Non-uniform stress distributions due to shear lag, in-plane load introduction and plate buckling are covered. The effects of out-of-plane loading are outside the scope of this document. NOTE 1 - The rules in this part complement the rules for class 1, 2, 3 and 4 sections, see EN 1993-1-1. NOTE 2 - For the design of slender plates which are subject to repeated direct stress and/or shear and also fatigue due to out-of-plane bending of plate elements ("breathing"), see EN 1993-2 and EN 1993-6. NOTE 3 - For the effects of out-of-plane loading and for the combination of in-plane effects and out-of-plane loading effects, see EN 1993-2 and EN 1993-1-7. Unless specifically stated, EN 1990, the EN 1991 series and EN 1993-1-1 apply. The design methods given in EN 1993-1-5 are applicable if - the execution quality is as specified in EN 1090-2 and - the construction materials and products used are as specified in the relevant parts of the EN 1993 series or in the relevant material product specifications.