Page 540 - Offshore Electrical Engineering Manual

Index 527

Event failure rates, evaluation using, Fault tree(s), 393–398
397–398, 397f common mode failure identification, 395
Event probabilities, evaluation using, construction, 393–395
395–397, 396f fault model, 394f
EX ‘d’ equipment, 305 qualitative analysis, 395
EX ‘e’ equipment, increasing safety, 306 quantitative analysis, 395–398
EX ‘i’a equipment, 309 Ferromagnetic core, 173
EX ‘i’b equipment, 309 Ferromagnetic steel laminations, 173
EX ‘N’ Ff. See FOUNDATION fieldbus (Ff)
equipment, 308 Field
motor, 307 faults, 210
EX ‘nA’ non-sparking, 307–308 heating limit, 37
EX ‘P’ equipment, 308 Filters, 274
Examination, 417 Financing, 463, 464t
Excitation systems, alternators and, 62 Fire
Exciter, 237, 350 and flammable gas detection, 339
field windings, 350 and gas
Explosion-proof considerations, 168–170
equipment groups, 306, 306t monitoring, 16–18
EX ‘d’ equipment, 305 panels, 112
Explosive pump diesel engine starting requirements, 130
atmosphere, 303 pumps, 8
mixture, 304 systems and ventilation control on
External telecommunications, 178–179 rigs, 338
Fixed installation, 338
F Fixed platforms, 455–456
Factory acceptance tests, 359 Flamepath dimension, 306
Failure mode, effects and criticality analysis Flameproof
(FMECA), 63, 270, 388, 389f–390f barrier glands, 97
Failure mode effect, 393 certification, 305
Failure modes, effects and diagnostic analysis Flammable gases, 303
(FMEDA), 448 Flashpoint temperature, 304
Failure rates, 400 Flat compounding, 84
Fan and airflow noise, 301 Floating installations, 89
Fault breaking Floating production, storage and offloading units
capability, 67 (FPSO units), 327, 330, 335
currents, 69 inert gas system, 335–336
Fault calculation, 231–235, 237 safety critical systems, 336
cable sizing spreadsheet, 233f Floodlighting, 158, 158t
equivalent voltage source method, 238f Floor cavity index (CI(F)), 153
generator reactance values, 233t Fluorescent
main generator fault currents, 232–234 lighting, 37
proving software, 250 luminaires, 160–161
small generator fault current maintenance circuit, FMECA. See Failure mode, effects and criticality
238f analysis (FMECA)
switchboard fault currents, 234–235 FMEDA. See Failure modes, effects and diagnostic
Fault current(s), 90, 237, 238f, 251, 256 analysis (FMEDA)
IEC 61363 individual phase, 242f FOUNDATION fieldbus (Ff), 166–167
maintenance kit, 208 FPSO units. See Floating production, storage and
in phase/sequence for any fault types, 245f offloading units (FPSO units)
Fault making Frame earth protection, 223–224, 223f
capability, 67 Frequency, 102–103, 114
currents, 69 Friction and windage losses, 349