BS IEC 61892-2:2019
$215.11
Mobile and fixed offshore units. Electrical installations – System design
Published By | Publication Date | Number of Pages |
BSI | 2019 | 114 |
This part of IEC 61892 is applicable to system design of electrical installations and equipment in mobile and fixed offshore units including pipeline, pumping or “pigging” stations, compressor stations and single buoy moorings, used in the offshore petroleum industry 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 voltage level limitation. Referenced equipment standards may give voltage level limitations.
This document specifies requirements such as those concerning
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sources of electrical power for manned and unmanned units,
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system earthing, both for low-voltage and high-voltage installations,
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interface for electric transmission systems with power supplied from shore, between interconnected offshore units, and with power supplied by offshore units to subsea installations,
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distribution systems,
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cables and wiring systems,
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system studies and calculations,
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protection against electrical faults,
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lighting,
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energy control, monitoring and alarm systems, and
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turret/swivel.
This document gives information and guidance on topics such as
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applicable examples of HVDC VSC technology, and
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guidelines for illumination level.
This document does not apply to
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fixed equipment for medical purposes,
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electrical installations of tankers, and
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control of ignition sources other than those created by electrical equipment.
NOTE 1 For medical rooms, IEC 60364-7-710 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.
PDF Catalog
PDF Pages | PDF Title |
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2 | undefined |
4 | English CONTENTS |
10 | FOREWORD |
12 | INTRODUCTION |
13 | 1 Scope |
14 | 2 Normative references |
15 | 3 Terms, definitions and abbreviated terms 3.1 Terms and definitions |
17 | Figures Figure 1 – Continuity of supply/continuity of service |
22 | 3.2 Abbreviated terms 4 Sources of electrical power for manned units 4.1 General |
23 | 4.2 Main sources of electrical power 4.2.1 Common requirements Figure 2 – Power system hierarchy in an offshore unit |
24 | 4.2.2 Capacity of main and essential power source 4.2.3 Load shedding arrangement |
25 | 4.3 Essential source of electrical power 4.4 Emergency source of electrical power |
28 | 4.5 Starting arrangements for emergency generators |
29 | 4.6 Additional requirements for periodically unattended machinery spaces 4.7 Uninterruptible power system (UPS) source of power 4.7.1 General |
30 | 4.7.2 UPS functionality – Uninterruptible source of power for critical/sensitive loads 4.7.3 UPS – Design planning issues |
32 | 4.8 Transmission systems including main power from shore |
33 | 4.9 Alternative sources of power |
34 | 5 Sources of electrical power for unmanned units 5.1 General 5.2 Power sources 5.2.1 Sources to be evaluated 5.2.2 Cable from other unit or from shore 5.2.3 Local generator (gas or diesel) 5.2.4 Alternative sources of power |
35 | 5.2.5 UPS 5.3 Factors affecting power supply requirements 6 System earthing 6.1 General requirements |
36 | 6.2 Neutral earthing for systems up to and including 1 000 V AC 6.3 Neutral earthing for systems above 1 000 V AC |
37 | 6.4 Parallel operated power sources 6.5 Earthing resistors, connection to hull/structure |
38 | 7 Distribution systems 7.1 DC distribution systems 7.1.1 Types of distribution systems Tables Table 1 – Summary of principal features of the neutral earthing methods |
39 | 7.1.2 TN DC systems |
40 | Figure 3 – TN-S DC system |
41 | Figure 4 – TN-C DC system |
42 | 7.1.3 IT DC systems Figure 5 – TN-C-S DC system |
43 | 7.1.4 DC voltages Figure 6 – IT DC system Table 2 – Voltages for DC systems |
44 | 7.2 AC distribution systems 7.2.1 Primary AC distribution systems 7.2.2 Secondary AC distribution systems 7.2.3 TN AC systems |
45 | Figure 7 – TN-S AC system Figure 8 – TN-C-S AC system |
46 | 7.2.4 IT AC systems 7.2.5 AC voltages and frequencies Figure 9 – TN-C AC system Figure 10 – IT AC system |
47 | Table 3 – AC systems having a nominal voltage between 100 V and 1 000 V inclusive and related equipment |
48 | 7.2.6 Earthing systems 8 Distribution system requirements 8.1 Methods of distribution Table 4 – AC three-phase systems having a nominal voltage above 1 kV and not exceeding 35 kV and related equipment a |
49 | 8.2 Balance of loads 8.2.1 Balance of load on three-wire DC systems 8.2.2 Balance of loads in three- or four-wire AC systems 8.3 Final circuits 8.3.1 General 8.3.2 Final circuits for lighting 8.3.3 Final circuits for heating 8.3.4 Final circuits for sockets |
50 | 8.4 Control circuits 8.4.1 Supply systems and nominal voltages 8.4.2 Circuit design 8.4.3 Protection |
51 | 8.4.4 Arrangement of circuits 8.5 Motor circuits 8.5.1 Starting of motors |
52 | 8.5.2 Means of disconnection 8.5.3 Starters remote from motors 8.6 Isolation of supply to galley 9 Cables and wiring systems 9.1 Cables |
53 | 9.2 Voltage drop 9.3 Demand factors 9.3.1 Final circuits 9.3.2 Circuits other than final circuits 9.3.3 Application of diversity and demand factors 9.4 Motor circuits |
54 | 9.5 Cross-sectional areas of conductors 9.6 Correction factors for cable grouping 9.7 Separation of circuits |
55 | 10 System study and calculations 10.1 Electrical studies – General |
56 | 10.2 Electrical load study |
57 | 10.3 Load flow calculations |
58 | 10.4 Short-circuit calculations |
60 | 10.5 Protection and discrimination study |
61 | 10.6 Power system dynamic calculations |
63 | 10.7 Calculation of harmonic currents and voltages 11 Protection 11.1 General |
64 | 11.2 Characteristics and choice of protective devices with reference to short-circuit rating 11.2.1 General 11.2.2 Protective devices |
65 | 11.2.3 Backup protection 11.2.4 Rated short-circuit breaking capacity |
66 | 11.2.5 Rated short-circuit making capacity Figure 11 – Use of FCL in emergency switchboard |
67 | 11.2.6 Co-ordinated choice of protective devices with regard to discrimination requirements 11.3 Choice of protective devices with reference to overload 11.3.1 Protective devices 11.3.2 Fuses for overload protection 11.4 Choice of protective devices with regard to their application 11.4.1 General 11.4.2 Generator protection |
68 | 11.4.3 Protection of UPS |
69 | 11.4.4 Protection of transformers 11.4.5 Transformers – Isolation of windings 11.4.6 Circuit protection 11.4.7 Motor protection |
70 | 11.4.8 Protection of lighting circuits 11.4.9 Protection of power from external sources 11.4.10 Secondary cells and battery protection 11.4.11 Protection of static or solid-state devices |
71 | 11.4.12 Protection for heat tracing systems 11.5 Undervoltage protection 11.5.1 Generators 11.5.2 AC and DC motors 11.6 Overvoltage protection 11.6.1 General 11.6.2 AC machines 11.6.3 DC networks |
72 | 12 Lighting 12.1 General 12.2 General lighting system 12.3 Emergency lighting system |
73 | 12.4 Escape lighting system 12.5 Lighting circuits in machinery spaces, accommodation spaces, open deck spaces, etc. 12.6 Navigation and obstruction signals and lights |
74 | 13 Energy control, monitoring and alarm system 13.1 General 13.2 Alarm system 13.3 Network topology 13.4 Router communication 13.5 Communication protocols |
75 | 13.6 Monitoring and fault diagnosis 13.7 Cybersecurity 13.8 Energy management and control systems (EMCS) 13.8.1 General 13.8.2 EMCS architecture |
76 | 13.8.3 Interaction with protection system 13.8.4 Performance 13.9 Electromagnetic compatibility |
77 | 13.10 Time identification and event logs 13.11 Remote controls 13.11.1 Continuous status information 13.11.2 Independent control 13.11.3 Exclusive control 13.11.4 Interlocks in operative command 13.12 Human-machine interface 13.13 Emergency stop 13.14 Automatic control of electrical power sources 13.14.1 Initiation of starting commands |
78 | 13.14.2 Pre-starting conditions 13.14.3 Standby indication 13.15 Automatic connecting onto a dead busbar 13.15.1 Connection at blackout 13.15.2 Short-circuit 13.16 Delayed disconnection 13.17 Automatic starting arrangements for electrical motor-driven auxiliaries 13.17.1 Prevention of overload via sequential restart 13.17.2 Start inhibit 13.18 General alarm systems 13.18.1 Audibility |
79 | 13.18.2 Minimum sound level 13.18.3 Fault tolerance 13.18.4 Power supplies 13.19 System integration 13.19.1 Alarm functions 13.19.2 Essential and emergency control functions |
80 | 13.20 Software 13.20.1 Version control of software 13.20.2 Configuration – Support functions 13.20.3 Documentation |
81 | 13.21 Tests 13.21.1 General 13.21.2 Hardware 13.21.3 Software 13.21.4 System testing |
82 | 14 Special facilities – Swivel/turret 14.1 Standards, codes and regulations 14.2 Bonding and protective earthing of power swivel |
83 | Annexes Annex A (informative) Essential source of electrical power |
84 | Annex B (informative) Emergency source of electrical power |
85 | Annex C (informative) Applicable examples of HVDC VSC technologies |
86 | Figure C.1 – Typical HVDC VSC transmission between onshore grid and offshore petroleum unit; symmetric monopole Figure C.2 – Typical symmetric and asymmetric monopole andbipole HVDC VSC arrangement |
88 | Figure C.3 – Principle drawings of possible topology arrangements for two-level (left) and multi-level (right) types with indication of corresponding filtered (blue) and non�filtered (green) output voltage wave forms |
89 | Annex D (informative) Swivel/turret D.1 General D.2 Swivel design and service location |
90 | D.3 Fault exposure of high-voltage electrical swivels D.4 Enclosure and purging system D.5 Ingress protection |
91 | D.6 Anti-condensation D.7 Inspection and functional testing of swivel unit |
92 | Annex E (informative) Guidelines for design of unmanned units E.1 Factors affecting power supply requirements E.2 Guideline for defining power sources requirement E.2.1 One main power supply and UPS |
93 | E.2.2 One emergency power supply and UPS E.2.3 One main power supply, one emergency power supply and UPS E.2.4 Renewable sources of energy |
94 | E.3 Layout E.4 Switchboard arrangements |
95 | Figure E.1 – Example of electrical arrangement for an unmanned unit |
96 | E.5 High-voltage equipment Figure E.2 – Example of electrical arrangement for an unmanned unit Figure E.3 – Example of electrical arrangement for an unmanned unit |
97 | E.6 Lighting system |
98 | Annex F (informative) Alternative sources of electrical power F.1 General F.2 Photovoltaic system |
99 | F.3 Wind turbine system Figure F.1 – PV Power generating system – Major functional elements, subsystems and power flow diagram |
100 | Figure F.2 – Typical diagram for the island function of a wind generation system – Unmanned unit |
101 | Figure F.3 – Typical diagram for the island function of a wind generation system – Manned unit |
102 | F.4 Microturbines Figure F.4 – Microturbine typical block diagram |
103 | F.5 Closed cycle vapour turbines (CCVT) Figure F.5 – CCVT operating principle block diagram |
104 | F.6 Thermoelectric generators (TEG) Figure F.6 – Typical diagram for the thermoelectric generation system (TEG) |
106 | Annex G (informative) Illumination level G.1 General illumination level G.2 Emergency lighting G.3 Escape lighting Table G.1 – General lighting illumination levels |
107 | G.4 Verification of lighting level Table G.2 – Recommended measuring points for measuring illumination in an area |
108 | Annex H (informative) Enhanced software simulation H.1 General H.2 Scope of HiL testing H.3 Schedule and work process H.4 Requirements relating to the control system vendor or system integrator |
109 | H.5 Documentation and approval |
110 | Annex I (informative) Architecture for energy control, monitoring and alarm system – Level reference and segmentation architecture Figure I.1 – IEC 62443 reference architecture |
111 | Bibliography |