Page 551 - Offshore Electrical Engineering Manual

538 Index

Seawater, 297, 462 Simple apparatus and components, 312–313
lift pumps, 127–128, 128f–129f Single-core cables, 95
SECEs. See Safety and Environmentally Critical Single-line diagram, 185, 186f
Elements (SECEs) SIS. See Safety instrumented system (SIS)
Secondary injection, 365 Size for load profiles, 57
tests, 366–369, 367f–368f Sizing of conductors, 229–231
Secure alternating current and direct current busbar sizing, 230
power supplies, 9 cable sizing, 230–231
Secure power supplies, 111–112 load flow, 229–230
Secure power supply systems, 111–112, 283 ‘Slack’ or ‘swing’ bus, 230
batteries, 283 Slip rings, 37
chargers and invertors, 283 excitation systems, 35
Self-elevating platforms, 455 Slot tooth vibration noise, 301
Self-elevating rigs Slugs of condensate, 50–51, 55
duties, 339 Small generator fault current maintenance circuit,
facilities, 339 237, 238f
Semaphore effect, 268 Small input/output module (I/O module), 108
Semiconductor devices, 355 Small power, 282
Semiconductor equipment. See Power electronics Small-generator fault current maintenance circuit,
Semisubmersibles, 455 231–232, 232f
ballast control systems, 332–333 Sockets, 137
cement kill pumps and controls, 338 Sodium chloride, 295
drilling mud facilities, 338 ‘Soft’ starters, 109–110
electrical drilling direct current and alternating Solid-state controllers, 116–117
current semiconductor drives, 338 Solid-state devices, 111
fire and gas and ventilation control on rigs, 338 Space limitations, 3
pontoon and leg equipment installation, 337 Space requirements for circuit breaker handling
power generation, 337 trucks, 76
UK Offshore Safety Case Legislation, 338 Spacing-to-height ratio (SHR), 153
watertight door monitoring and ballast control Spares rationalisation, 407
systems, 337 Spark duration and voltage, 54
7 Nm impact test, 307 Speed, 36, 122
Shaft speed, 102, 122 motors, 102
Shale shaker, 458 speed/torque characteristics, 103, 123
Shielded system, 53 Squirrel-cage motors, 101
Shims, 281 Stabilising resistor, 208–209
Ships, 291 Stability voltage, 224
Shock, 299 Stainless steel, 295
Short cable feeder protection, 227–228 Stairways, 163
Short circuit, 237–240 Stalling protection, 217
current interruption mechanism, 68–69, 68f Standard methods of calculation, 238–239, 239t
test, 349 Star delta starters, 107
Short shunt, 84f, 85 Start buttons, 265
SHR. See Spacing-to-height ratio (SHR) Starting
Shunt field, 85 motors, 101
windings, 83 process drives and starting requirements,
Shutdown, 383 121–122
SIF. See Safety instrumented function (SIF) Static and microprocessor-based relay
Signal lamp, 284 types, 218, 219t
Silicon controlled rectifier (SCR), 9–11, 119, 127 Static relay, 218, 219t
cubicle schematic diagram, 79f–80f Stator
equipment, 78 critical motors, 216–217
SILs. See Safety integrity levels (SILs) and rotor heating limits, 39