Normy

Obsah

ČSN EN ISO 636 Norma ČSN EN ISO 636 stanoví požadavky na klasifikaci tyčí, drátů a návarů ve stavu po svařování nebo ve stavu po tepelném zpracování po svařování pro obloukové svařování nelegovaných a jemnozrnných ocelí wolframovou elektrodou v inertním plynu s minimální mezí kluzu až do 500 MPa nebo minimální pevností v tahu až do 570 MPa. Norma je kombinovaný předpis poskytující klasifikaci buď podle systému založeného na mezi kluzu a průměrné nárazové práci 47 J čistého svarového kovu (Systém A) nebo podle systému založeného na pevnosti v tahu a průměrné nárazové práci 27 J čistého svarového kovu (Systém B).

Obsah

ČSN EN 1434-3 This document specifies the general requirements of data exchange and interfaces for thermal energy meters. This document is applicable to unidirectionally and bidirectionally transmitting thermal energy meters. This document applies also to networks with up to 250 meters, for which a master unit with AC mains supply is necessary to control the M-Bus. In these cases, the document is only applicable in conjunction with EN 13757-2 (physical and link layer) and EN 13757-3 (application layer). For wireless thermal energy meter communications, this document is only applicable in conjunction with EN 13757-4, which describes several alternatives of walk/drive-by readout via a mobile station or by using stationary receivers or a network. NOTE - Thermal energy meters are instruments intended for measuring the energy which in a heat-exchange circuit is absorbed (cooling) or given up (heating) by a liquid called the heat-conveying liquid. The meter indicates thermal energy in legal units.

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ČSN EN ISO 505 This document specifies a method of test for the measurement of the propagation resistance of an initial tear in textile conveyor belts, either in full thickness or of the carcass only. This document is applicable to textile belts in installations where there is a risk of longitudinal tearing.

Obsah

ČSN EN 4073 This document specifies the characteristics of screws, pan head, six lobe recess, coarse tolerance shank, medium length thread, in alloy steel, cadmium plated. Classification: 1 100 MPa /235 °C.

Obsah

ČSN EN IEC 60034-11 ed. 2 Norma stanovuje požadavky týkající se používání tepelných chráničů a tepelných čidel vestavěných do statorových vinutí nebo umístěných na jiných vhodných místech v asynchronních strojích kvůli jejich ochraně před závažným poškozením v důsledku tepelných přetížení. Platí pro jednootáčkové trojfázové asynchronní motory 50 Hz nebo 60 Hz v souladu s IEC 60034-1 a IEC 60034-12, které mají jmenovité napětí do 1 000 V, jsou určeny pro přímé připojení na síť nebo pro spouštění hvězda-trojúhelník. Dokument nezahrnuje přímou ochranu rotorového vinutí, ochranu ložisek a jiných mecha-nických částí a způsoby ochrany, který mají být použity pro konkrétní aplikace.

Obsah

ČSN EN IEC 63522-14 This part of IEC 63522 is used for testing along with the appropriate severities and conditions for measurements and tests designed to assess the ability of DUTs to perform under expected conditions of transportation, storage and all aspects of operational use. This document defines a test for determining the extent to which electrical relays support mould growth and how any mould growth can affect the performance and other relevant properties/functions of a relay.

Obsah

ČSN EN IEC 63522-25 This part of IEC 63522 is used for testing along with the appropriate severities and conditions for measurements and tests designed to assess the ability of DUTs to perform under expected conditions of transportation, storage and all aspects of operational use. This document defines a standard test method to check the magnetic interference between relays under operating conditions and their influence on other relays in the neighbourhood.

Obsah

ČSN EN IEC 63522-35 This document is used for testing all kind of relays within the scope of technical committee 94 and evaluates their ability to perform under expected conditions of transportation, storage and all aspects of operational use. This document defines a standard test method for resistance to cleaning solvents.

Obsah

ČSN EN IEC 63522-12 This document is used for testing electromechanical elementary relays (electromechanical relays, reed relays, reed contacts, reed switches and technology combinations of these) and evaluates their ability to perform under expected conditions of transportation, storage, and all aspects of operational use. This document defines a standard test method to provoke internal moisture inside relays by different methods. The device under test (DUT) is tested at its specified energization values throughout the defined temperature range. The test methods in this document are applicable to RT III, RT IV and RT V products only, i.e., wash-tight, sealed, and hermetically sealed DUTs.

Obsah

ČSN EN IEC 63522-39 This part of IEC 63522 is used for testing electromechanical elementary relays (electromechanical relays, reed relays, reed contacts, reed switches and technology combination of these) and shall evaluate their ability to perform under expected conditions of transportation, storage and all aspects of operational use. This document defines standard test methods for: 1) measuring the insertion and withdrawal forces of the mating relay and socket; 2) measuring the insertion and withdrawal forces on relays with flat quickconnect terminations; 3) verifying the correct connection of flat terminals with eye lug connectors.

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ČSN EN IEC 63522-36 This part of lEC 63522 is used for testing all kinds of electrical relays and for evaluating their ability to perform under expected conditions of transportation, storage, and all aspects of operational use. NOTE - Examples for electrical relays in the sense of this document include electromechanical relays, reed relays, reed contacts, reed switches, solid state relays, time relays and technology combinations of these. This document defines a standard test method to measure fire hazards of all materials susceptible to fire hazards.

Obsah

ČSN EN IEC 62868-2-4 This part of IEC 62868 specifies the safety requirements for rigid organic light emitting diode (OLED) tiles and panels for use on supplies up to 120 V ripple free DC for indoor and similar general lighting purposes.