Page 552 - Offshore Electrical Engineering Manual

Index 539

Stator windings, 207 drilling supplies, 78
cold resistance of, 350 general requirements, 67
Steel jacket structures, 455 living quarters supplies, 81
Steelwork, 285 mechanism of short circuit current interruption,
Step-up transformers, 344 68–69, 68f
Stop buttons, 265 oil, 356
Stress corrosion, 295 process area distribution, 81
Submain generators, 5 rating for voltages above 1000 V, 354–356
Submerged pipelines, 141 sulphur hexafluoride, 356–357
Submersible electric, 127 switchboard construction, 75–78
Submersible hydraulic, 127 tripping supplies, 112
Subsea cable, 21–22 types of interrupter, 71–75
Subsea completions, 459 vacuum circuit breakers, 356
modules, 134, 135f Switching direct currents, 89–90
Subsea power supplies, 133 Switchrooms, 18
Subsea supplies Synchronising equipment, 267–268
diver’s life support equipment, 133–134 Synchronising indicators, 268
diving chambers for saturation diving, 136–137 Synchronous motor, 103
inductive couplers, 137 protection for, 220
subsea completion modules, 134 Synchroscope, 268
subsea power supplies, 133 System
subsea umbilicals and power cables, 137–139 data, 252
Subsea umbilicals and power cables, 137–139 fault currents, 234
Subtransient reactance, 36 frequency, 102, 122
Sulphur hexafluoride (SF6) impressed current systems, 140–141
circuit breakers, 75 on submerged pipelines, 141
switchgear, 356–357
Superstructure, 456 T
Supply circuits, 280 TD/PM. See Touchdown/Positioning (TD/PM)
Supply parameters, 4 Technical organisation of design programme
Supply system, abnormalities in, 216 databases and schedules, 194–202
Surface temperature, 26–27 drawing representation, 185–194
Survivability, 178 office environment and procedures, 184–185
Switch mode power supplies, 274 office procedures, 185
Switchboard, 18, 19f–20f, 20, 237, 280 project procedures, 183–184
construction TEFC. See Totally enclosed fan cooled (TEFC)
emergency switchboards, 77–78 Telecom systems, 178
general, 75–76 Telecommunications. See also Communications
large drive switchboards 3.3–6.6 KV, 77 external telecommunications, 178–179
main switchboards 6.6–13.8 KV, 76–77, 76t internal communications, 177–178
utility services and production redundancy, diversity, survivability and safety
switchboards, 77 issues, 178
emergency or basic services switchboard, 8 redundancy, diversity and safety issues, 179
fault currents, 234–235 Telecoms-based shutdown systems, 180
metering, 353 Telephones, 284
Switchgear, 57, 184, 237, 241, 279–280, 370. communications, 408
See also Direct current switchgear Temperature
(DC switchgear) gradient, 26–27
air break switching devices and fuses rise, 27–28, 29t
rating, 353–354 measurement method by resistance, 30
air circuit breakers for voltages above Temporary Safe Refuge, 17
1000 V, 354–356 TEMPSC. See Totally enclosed motor propelled
breaking current, 69–71 survival craft (TEMPSC)