Rechercher

IEC 62488-1:2012 applies to the planning of analogue and digital power line carrier systems operating over EHV/HV/MV electricity grids. The object of this standard is to establish the planning of the services and performance parameters for the operational requirements to transmit and receive data efficiently over power networks. The transmission media used by the different electricity supply…

1 Scope This clause of Part 1 is replaced by the following. This International Standard deals with the safety of electric HEAT PUMPS, including SANITARY HOT WATER HEAT PUMPS, AIR-CONDITIONERS, and DEHUMIDIFIERS incorporating motor-compressors and hydronic room FAN COILS, their maximum RATED VOLTAGES being not more than 250 V for single phase appliances and 600 V for all other appliances.…

Scope 1.1 This standard applies to newly produced automatic valves (Section 3, Definitions) constructed entirely of new, unused parts and materials. These valves may be individual automatic valves or valves utilized as parts of automatic gas ignition systems. This standard also applies to commercial/industrial safety shutoff valves (Section 3, Definitions), herein after referred to as C/I…

1 Scope 1.1 This International Standard is applicable to: - flow-metering devices that are connected, either directly or by means of flexible connecting assemblies, and disconnected by the operator at terminal units of a medical gas pipeline system for flow adjustment, measurement and delivery of medical gases; - flow-metering devices that are connected and disconnected by the operator at gas-…

Scope 1.1 This Standard is intended to be read together with Annex A, Ref. No. 1. The requirements of Annex A, Ref. No. 1 apply unless modified by this Standard.

Scope 1.1 These requirements cover devices and systems intended for use in accordance with Annex A, Ref. No. 1, to reduce the risk of electric shock to the user from accessible parts, in grounded or isolated circuits for charging electric vehicles. These circuits are external to or on board the vehicle. 1.2 The devices and systems covered by these requirements are compatible with the designs of…

Scope 1.1 This standard applies to: a) Automatic transfer switches; b) Manual or non-automatic transfer switches; c) Closed transition transfer switches; d) Hybrid transfer switches; e) Transfer switches for fire pumps; f) Bypass/isolating switches; g) Softload transfer switches; and h) Transfer switches intended for use as service equipment; that have a maximum rating of 600 volts for…

This International Standard specifies requirements for principles for the qualification and certification of personnel who perform industrial non-destructive testing (NDT). The system specified in this International Standard can also apply to other NDT methods or to new techniques within an established NDT method, provided a comprehensive scheme of certification exists and the method or technique…

ISO 16486-6:2012 specifies a code of practice dealing with unplasticized polyamide (PA-U) piping systems intended to be buried outside buildings and used for the supply of gaseous fuels. It addresses the common basic principles for gas supply systems. ISO 16486-6:2012 is intended to be applied in association with national standards or codes of practice related to the above-mentioned basic…

1.1 Scope This standard specifies uniform methods for testing and evaluating the performance of fittings for use with compressed hydrogen gas and hydrogen rich gas mixtures. It does not address special requirements for liquid and slush hydrogen. This standard applies to hydrogen systems applications to meet current market needs. In this standard, the term “fittings” includes fittings,…