IEC 61892-1:2019 pdf download
IEC 61892-1:2019 pdf download.Mobile and fixed offshore units – Electrical installations – Part 1: General requirements and conditions
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: • IEC Electropedia: available at http://www.electropedia.org/ • ISO Online browsing platform: available at http://www.iso.org/obp NOTE The terms and definitions included in this document are those that have general application in the IEC 61 892 series. Terms and definitions applying to particular apparatus or equipment are included in the other parts of the IEC 61 892 series. 3.1 offshore unit construction, buoyant or non-buoyant, designed and built for installation or operation at an offshore location Note 1 to entry: Topside interface of subsea installed equipment which is an integral part of production and transport systems assigned to fixed and floating offshore units, as well as a temporary interface to mobile offshore units, are also considered as part of the offshore unit. 3.2 unmanned offshore unit offshore unit normally unmanned, remote controlled without need of human presence for operability and without living quarter facilities Note 1 to entry: An unmanned offshore unit may also contain a survival shelter to support occasional site maintenance.3.3 fixed offshore unit buoyant or non-buoyant construction engaged in offshore operations including drilling, production, storage or support functions, and which is designed and built for installation at a particular offshore location Note 1 to entry: LNG production units and LNG storage and regasification unit terminals are also considered to be fixed offshore units. FPSO/FSO on location is also considered as a fixed offshore unit. Floating LNG terminals and FPSOs with detachable arrangements are also considered to be fixed offshore units. 3.4 mobile offshore unit buoyant construction engaged in offshore operations including drilling, production, storage, accommodation or support functions, not intended for service at one particular offshore site and which can be relocated without major dismantling or modification, for example barges, semisubmersible or jack-up unit and drill-ships 3.5 manned unit offshore unit with need of human presence for operation and maintenance, and provided with living quarter facility 3.6 satellite unit small offshore unit, normally unmanned, connected to a larger unit by means of a pipeline, power cable and/or umbilical 3.7 appropriate authority governmental body and/or classification society with whose rules a unit is required to comply 3.8 equipment single apparatus or set of devices or apparatuses, or the set of main devices of an installation, or all devices necessary to perform a specific task EXAMPLE Power transformer, measuring equipment. [SOURCE: IEC 60050-1 51 :2001 , 1 51 -1 1 -25, modified – The words “the equipment of a substation” have been removed from the example.]3.1 1 primary distribution system system which is galvanically connected to the generator or, in offshore units with power supply from another unit or shore via cable, connected to the switchboard where the voltage regulation takes place 3.1 2 secondary distribution system system without galvanic connection to the generator or to the switchboard where the voltage regulation takes place 3.1 3 distribution board assembly containing different types of switchgear and controlgear associated with one or more outgoing electric circuits fed from one or more incoming electric circuits, together with terminals for the neutral and protective conductors, if required [SOURCE: IEC 60050-826:2004, 826-1 6-08, modified – The words “if required” have been added.] 3.1 4 earth ground, US, CA general mass of the metal structure or hull of the unit 3.1 5 earthed connected to the general mass of the metal structure or hull of the unit in such a manner as to ensure at all times an immediate discharge of electrical energy without danger 3.1 6 emergency service services required to allow safe shutdown of the unit and provide safety oriented services for the personnel on the unit during an emergency situation for a defined time EXAMPLE Emergency shutdown system, emergency lighting, firefighting, alarm and telecommunication systems are examples of emergency services.
