IEC 61892-5:2019 pdf download

IEC 61892-5:2019 pdf download.Mobile and fixed offshore units – Electrical installations – Part 5: Mobile units
1 Scope
This part of IEC 61 892 specifies additional characteristics for electrical installations in mobile units. It applies to installations that depend on buoyancy, such as column-stabilized units (semi-submersible units), ship- or barge-type units as well as self-elevating units. It specifies additional characteristics for such units, used during transfer from one location to another and for drilling, production, accommodation, processing, storage and offloading purposes. It applies to all installations, whether permanent, temporary, transportable or hand-held, to AC installations and DC installations without any limitation on voltage level. Referenced equipment standards may give voltage level limitations. This document specifies requirements such as those concerning
– environmental conditions,
– limits of inclination for the unit where the equipment is required to operate,
– bilge pumps,
– navigation and obstruction lights,
– steering gear,
– ballast system,
– jacking systems, and
– anchoring systems.
For electric propulsion, reference is made to IEC 60092-501 .
For dynamic positioning systems, reference is made to relevant IMO requirements.
This document does not apply to
– fixed equipment for medical purposes,
– electrical installations of tankers, and
– control of ignition sources other than those created by electrical equipment.
NOTE 1 For medical rooms, IEC 60364-7-71 0 provides specific requirements. Requirements for tankers are given in IEC 60092-502.
NOTE 2 Guidance on protection of non-electrical equipment can be found in ISO 80079-36, ISO 80079-37 and IMO 2009 MODU Code, 6.7.
NOTE 3 Attention is drawn to further requirements concerning electrical installations on such mobile offshore units contained in the IMO MODU Code.
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 61 892-1 , IEC 61 892-2, IEC 61 892-3, IEC 61 892-6, and the following 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 3.1 auxiliary steering gear equipment, other than any part of the main steering gear, necessary to steer the unit in the event of failure of the main steering gear but not including the tiller, quadrant or components serving the same purpose 3.2 dynamic positioning system DP system equipment necessary to provide means of controlling the position and heading of a mobile unit within predetermined limits by means of resultant vectored thrust Note 1 to entry: This note applies to the French language only.3.3 electric steering gear power operated steering gear where an electric motor applies torque to the rudder stock through mechanical means only 3.4 electrohydraulic steering gear power operated steering gear where a hydraulic pump, driven by an electric motor, applies torque to the rudder stock through hydraulic and mechanical means 3.5 main steering gear machinery, rudder actuators, steering gear power units and ancillary equipment and the means of applying torque to the rudder stock (for example tiller or quadrant) necessary for effecting movement of the rudder for the purpose of steering the unit under normal service conditions 3.6 propulsion machinery rotating machine normally intended to provide propulsive power 3.7 redundancy existence, in an item, of more than one means for performing a required function [SOURCE IEC 60050-351 :201 3, 351 -42-28, modified – The definition has been reformulated and the notes to entry have been deleted.] 3.8 steering gear control system equipment by which orders are transmitted from the navigating bridge to the steering gear power units Note 1 to entry: Steering gear control systems comprise transmitters, receivers, hydraulic control pumps and their associated motors, motor controllers, piping and cables, etc. 3.9 steering gear power unit electric motor and its associated electrical and/or hydraulic equipment used to operate the steering gear