Page 544 - Offshore Electrical Engineering Manual

Index 531

Large marine renewable energy projects, 343 Low voltages (LVs), 211–212. See also High-
Large motors voltage (HV); Medium-voltage (MV)
motor commissioning tests, 375–380 distribution systems, 7–8, 227
precommissioning, 375 motors, 13–14
Laydown areas, 161, 202 switchboards, 222–223, 289, 290f
Lead–acid switchgear, 107–108
batteries, 115–116 system fault currents, 235
recombination cells, 115 Low-frequency magnetic noise, 301
Leg lighting, 162 Lube oil systems, 60–61
Leprack, 285 Lubricating oil, 60
Level Zero, 43 Luminaires with integral emergency batteries, 112
Lifeboat, 177 Luminous
Lighting, 282 flux, 145
calculations intensity, 145–146
linear sources, 146–149 LVs. See Low voltages (LVs)
point sources, 145–146
utilisation factors for interiors and average M
illuminance, 151–153 Machine
protection, 294 ratings basis, 28–30
strikes, 294 shafts, 281
LIM. See Line insulation monitor (LIM) Machinery drives, 101, 121
Limited oil volume circuit breakers, 73 Magnetic noise, 301
Line insulation monitor (LIM), 134 Magnetising/magnetisation
Linear sources, 146–149, 148f, 150f current, 365
Living quarters supplies, 81 curve tests, 364–365, 365f
Load, 255–256 inrush, 212
bus, 230 MAHs. See Major Accident Hazards (MAHs)
flow, 229–230 Main generator fault currents, 232–234
load–voltage characteristics, 41–42 Main hydraulic supply pump, 60
profiles, 55–58 Main lube oil pump, 60
choice of fuel, 56 Main oil line (MOL), 131
heat balance values, 59t Main switchboards 6.6–13.8 KV, 76–77, 76t
location, 57–58 Maintenance
low loading problems, 56 accessibility and communications, 407–408
main generation, 56 intervals and equipment specification, 408
number, 57 and logistics, 407
projected demand, 55 rationalisation of spares, 407
size, 57 scaffolding and abseiling, 408–409
variability of demand, 55 scheduling software, 409–410
sharing transport, accommodation and people onboard
of generators, 41 problems, 409
systems, 269 Maintenance factor (MF), 153
% Load to Trip contact, 217 Major accident, 416
Location Major Accident Hazards (MAHs), 414, 417
of engine intakes and exhausts, 299 Making current, 71
load profiles, 57–58 Management and Administration Regulations
Logic of area classification, 319, 320f–323f (MAR), 418
Logic simulators, 383 Manganese bronze, 296
Long shunt, 84f, 85 Manned installation, 43
Loop calculations for galvanic barriers, Manual calculations, 250
313–314, 314f MAR. See Management and Administration
Low loading problems, 56 Regulations (MAR)
LOW OIL LEVEL annunciator, 268–269 Marginal severity, 392