Page 547 - Offshore Electrical Engineering Manual

534 Index

Offshore installation, 177, 407, 413–414 Overcurrent
drilling essentials, 457–460 induction disc relays, 367
oil company operations, 463–464 protection, 208, 212, 221–222, 227–229, 252
production process essentials, 460–463 relay setting, 255–257
safety legislation, 418 computer-generated coordination chart using
types PTW captor, 264f
fixed platforms, 455–456 voltage controlled, 262–263
jack-up or self-elevating platforms, 455 voltage downstream of transformers during
semisubmersibles, 455 system fault graph, 262f
tension leg platforms, 456 relays, 365, 370, 371f
Offshore lighting Overhead equipment, 300
accommodation lighting, 159–160 Overheating
calculation procedure, 153 of motors, 273
average illuminance, 153 of transformers, 273–274
drilling areas, 160–161 Overload
emergency escape lighting, 163 protection, 216, 208
floodlighting, 158 trip, 217
helidecks, 161–162 Overpotential test voltages, 355–356, 377–378
illuminance at point, 156–158
jacket and leg lighting, 162 P
laydown areas, 161 P&B Golds relay, 217, 369
lighting calculations, 145–153 basic thermal overload element, 218f
navigational lighting, 162–163 P&C. See Predict & Control (P&C)
routine maintenance, 164 PA system. See Public address system
walkways, catwalks and stairways, 163 (PA system)
Offshore Renewable Energy PA/GA. See Public Address/General
Substations, 173 Alarm (PA/GA)
Oil PABX. See Platform private automated branch
company operations exchange (PABX)
division of labour, 463–464 Package control and supervision, 210
financing, 463, 464t PAG. See Protective Relay Application
and gas Guide (PAG)
installations, 173 Panel
oil and gas-operated devices, 213 general arrangement, 190
oil-filled transformers, 174, 176f wiring diagram, 194
separation, 460 Parallel operation, 85–87, 87f
storage and export, 462–463 of generators, 39–40
switchgear, 356 Parallel plane aspect factor, 148
tension leg platforms in oil installations, 341 Parallel transformers
On-board generation, 21–22 and intertripping, 213–214
Onshore momentary paralleling schemes, 213–214
emergency services and support, 113 People onboard (POB), 409
industrial plant, 101 Percentage distortion, 274–276
Open circuit test, 349 Percentage Total Harmonic Distortion
Open-delta secondary windings, 361 (%THD), 241
Operational hazards, 4 Perforation, 459
Optical isolation, 324 Performance standards, 417, 422, 431
Opto-isolators, 309 characteristics, 432
Output signal, 119 checklist of parameters, 444f
Over-/underfrequency protection, 209 conditions, 431
Over-/undervoltage protection, 209 internal communications and fire and gas system
Overcompounding, 84 performance standard, 433f–443f