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eLibrary >
BS IEC 61892-2:2019 Mobile and fixed offshore units. Electrical installations - System design >
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BS IEC 61892-2:2019 Mobile and fixed offshore units. Electrical installations - System design, 2019
- undefined
- English [Go to Page]
- CONTENTS
- FOREWORD
- INTRODUCTION
- 1 Scope
- 2 Normative references
- 3 Terms, definitions and abbreviated terms [Go to Page]
- 3.1 Terms and definitions
- Figures [Go to Page]
- Figure 1 – Continuity of supply/continuity of service
- 3.2 Abbreviated terms
- 4 Sources of electrical power for manned units [Go to Page]
- 4.1 General
- 4.2 Main sources of electrical power [Go to Page]
- 4.2.1 Common requirements
- Figure 2 – Power system hierarchy in an offshore unit [Go to Page]
- 4.2.2 Capacity of main and essential power source
- 4.2.3 Load shedding arrangement
- 4.3 Essential source of electrical power
- 4.4 Emergency source of electrical power
- 4.5 Starting arrangements for emergency generators
- 4.6 Additional requirements for periodically unattended machinery spaces
- 4.7 Uninterruptible power system (UPS) source of power [Go to Page]
- 4.7.1 General
- 4.7.2 UPS functionality – Uninterruptible source of power for critical/sensitive loads
- 4.7.3 UPS – Design planning issues
- 4.8 Transmission systems including main power from shore
- 4.9 Alternative sources of power
- 5 Sources of electrical power for unmanned units [Go to Page]
- 5.1 General
- 5.2 Power sources [Go to Page]
- 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
- 5.2.5 UPS
- 5.3 Factors affecting power supply requirements
- 6 System earthing [Go to Page]
- 6.1 General requirements
- 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
- 6.4 Parallel operated power sources
- 6.5 Earthing resistors, connection to hull/structure
- 7 Distribution systems [Go to Page]
- 7.1 DC distribution systems [Go to Page]
- 7.1.1 Types of distribution systems
- Tables [Go to Page]
- Table 1 – Summary of principal features of the neutral earthing methods [Go to Page]
- 7.1.2 TN DC systems
- Figure 3 – TN-S DC system
- Figure 4 – TN-C DC system [Go to Page]
- 7.1.3 IT DC systems
- Figure 5 – TN-C-S DC system [Go to Page]
- 7.1.4 DC voltages
- Figure 6 – IT DC system
- Table 2 – Voltages for DC systems
- 7.2 AC distribution systems [Go to Page]
- 7.2.1 Primary AC distribution systems
- 7.2.2 Secondary AC distribution systems
- 7.2.3 TN AC systems
- Figure 7 – TN-S AC system
- Figure 8 – TN-C-S AC system [Go to Page]
- 7.2.4 IT AC systems
- 7.2.5 AC voltages and frequencies
- Figure 9 – TN-C AC system
- Figure 10 – IT AC system
- Table 3 – AC systems having a nominal voltage between 100 V and 1 000 V inclusive and related equipment [Go to Page]
- 7.2.6 Earthing systems
- 8 Distribution system requirements [Go to Page]
- 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
- 8.2 Balance of loads [Go to Page]
- 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 [Go to Page]
- 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
- 8.4 Control circuits [Go to Page]
- 8.4.1 Supply systems and nominal voltages
- 8.4.2 Circuit design
- 8.4.3 Protection
- 8.4.4 Arrangement of circuits
- 8.5 Motor circuits [Go to Page]
- 8.5.1 Starting of motors
- 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 [Go to Page]
- 9.1 Cables
- 9.2 Voltage drop
- 9.3 Demand factors [Go to Page]
- 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
- 9.5 Cross-sectional areas of conductors
- 9.6 Correction factors for cable grouping
- 9.7 Separation of circuits
- 10 System study and calculations [Go to Page]
- 10.1 Electrical studies – General
- 10.2 Electrical load study
- 10.3 Load flow calculations
- 10.4 Short-circuit calculations
- 10.5 Protection and discrimination study
- 10.6 Power system dynamic calculations
- 10.7 Calculation of harmonic currents and voltages
- 11 Protection [Go to Page]
- 11.1 General
- 11.2 Characteristics and choice of protective devices with reference to short-circuit rating [Go to Page]
- 11.2.1 General
- 11.2.2 Protective devices
- 11.2.3 Backup protection
- 11.2.4 Rated short-circuit breaking capacity
- 11.2.5 Rated short-circuit making capacity
- Figure 11 – Use of FCL in emergency switchboard [Go to Page]
- 11.2.6 Co-ordinated choice of protective devices with regard to discrimination requirements
- 11.3 Choice of protective devices with reference to overload [Go to Page]
- 11.3.1 Protective devices
- 11.3.2 Fuses for overload protection
- 11.4 Choice of protective devices with regard to their application [Go to Page]
- 11.4.1 General
- 11.4.2 Generator protection
- 11.4.3 Protection of UPS
- 11.4.4 Protection of transformers
- 11.4.5 Transformers – Isolation of windings
- 11.4.6 Circuit protection
- 11.4.7 Motor protection
- 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
- 11.4.12 Protection for heat tracing systems
- 11.5 Undervoltage protection [Go to Page]
- 11.5.1 Generators
- 11.5.2 AC and DC motors
- 11.6 Overvoltage protection [Go to Page]
- 11.6.1 General
- 11.6.2 AC machines
- 11.6.3 DC networks
- 12 Lighting [Go to Page]
- 12.1 General
- 12.2 General lighting system
- 12.3 Emergency lighting system
- 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
- 13 Energy control, monitoring and alarm system [Go to Page]
- 13.1 General
- 13.2 Alarm system
- 13.3 Network topology
- 13.4 Router communication
- 13.5 Communication protocols
- 13.6 Monitoring and fault diagnosis
- 13.7 Cybersecurity
- 13.8 Energy management and control systems (EMCS) [Go to Page]
- 13.8.1 General
- 13.8.2 EMCS architecture
- 13.8.3 Interaction with protection system
- 13.8.4 Performance
- 13.9 Electromagnetic compatibility
- 13.10 Time identification and event logs
- 13.11 Remote controls [Go to Page]
- 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 [Go to Page]
- 13.14.1 Initiation of starting commands
- 13.14.2 Pre-starting conditions
- 13.14.3 Standby indication
- 13.15 Automatic connecting onto a dead busbar [Go to Page]
- 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 [Go to Page]
- 13.17.1 Prevention of overload via sequential restart
- 13.17.2 Start inhibit
- 13.18 General alarm systems [Go to Page]
- 13.18.1 Audibility
- 13.18.2 Minimum sound level
- 13.18.3 Fault tolerance
- 13.18.4 Power supplies
- 13.19 System integration [Go to Page]
- 13.19.1 Alarm functions
- 13.19.2 Essential and emergency control functions
- 13.20 Software [Go to Page]
- 13.20.1 Version control of software
- 13.20.2 Configuration – Support functions
- 13.20.3 Documentation
- 13.21 Tests [Go to Page]
- 13.21.1 General
- 13.21.2 Hardware
- 13.21.3 Software
- 13.21.4 System testing
- 14 Special facilities – Swivel/turret [Go to Page]
- 14.1 Standards, codes and regulations
- 14.2 Bonding and protective earthing of power swivel
- Annexes [Go to Page]
- Annex A (informative) Essential source of electrical power
- Annex B (informative) Emergency source of electrical power
- Annex C (informative) Applicable examples of HVDC VSC technologies
- 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
- 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
- Annex D (informative) Swivel/turret [Go to Page]
- D.1 General
- D.2 Swivel design and service location
- D.3 Fault exposure of high-voltage electrical swivels
- D.4 Enclosure and purging system
- D.5 Ingress protection
- D.6 Anti-condensation
- D.7 Inspection and functional testing of swivel unit
- Annex E (informative) Guidelines for design of unmanned units [Go to Page]
- E.1 Factors affecting power supply requirements
- E.2 Guideline for defining power sources requirement [Go to Page]
- E.2.1 One main power supply and UPS
- 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
- E.3 Layout
- E.4 Switchboard arrangements
- Figure E.1 – Example of electrical arrangement for an unmanned unit [Go to Page]
- 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 [Go to Page]
- E.6 Lighting system
- Annex F (informative) Alternative sources of electrical power [Go to Page]
- F.1 General
- F.2 Photovoltaic system
- F.3 Wind turbine system
- Figure F.1 – PV Power generating system – Major functional elements, subsystems and power flow diagram
- Figure F.2 – Typical diagram for the island function of a wind generation system – Unmanned unit
- Figure F.3 – Typical diagram for the island function of a wind generation system – Manned unit [Go to Page]
- F.4 Microturbines
- Figure F.4 – Microturbine typical block diagram [Go to Page]
- F.5 Closed cycle vapour turbines (CCVT)
- Figure F.5 – CCVT operating principle block diagram [Go to Page]
- F.6 Thermoelectric generators (TEG)
- Figure F.6 – Typical diagram for the thermoelectric generation system (TEG)
- Annex G (informative) Illumination level [Go to Page]
- G.1 General illumination level
- G.2 Emergency lighting
- G.3 Escape lighting
- Table G.1 – General lighting illumination levels [Go to Page]
- G.4 Verification of lighting level
- Table G.2 – Recommended measuring points for measuring illumination in an area
- Annex H (informative) Enhanced software simulation [Go to Page]
- 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
- H.5 Documentation and approval
- Annex I (informative) Architecture for energy control, monitoring and alarm system – Level reference and segmentation architecture
- Figure I.1 – IEC 62443 reference architecture
- Bibliography [Go to Page]
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