Page 537 - Offshore Electrical Engineering Manual

524 Index

Corrosion monitoring system, 165–166 Design and Construction Regulations (DCR), 418
Corten A, 285 Design drawings, 279, 284
Countable fault, 310 Design project organisation and documentation
Coupling bolts, 281 erection procedure, 202–204
Cranes, 409 material and equipment handling and storage, 202
Critical severity, 392 technical organisation of design programme,
Criticality matrix, 391–392, 392f 183–202
Crude oil and condensates, 4 Deviated drilling, 459–460
CTs. See Current transformers (CTs) DeviceNet, 109
Cubicles, 283 DF. See Degrees of freedom (DF)
Cullen Report, 317–318 Diesel
Current harmonics, 276 diesel–electric fire pumps, 128–130, 130f
Current ratio check, 362–364 engines, 53
method 1, 362–364, 363f Differential Absolute and Relative Positioning
method 2, 364, 364f Sensor (DARPS), 335
Current total harmonic distortion, 276 Differential protection, 212–213, 224
Current transformers (CTs), 31, 208, 212, 217, 221, Digital computer programs, 240
353, 359, 363f Digital methods of fault calculation, 240
current ratio check, 362–364 Digital overload relays, 108
magnetisation curve tests, 364–365 Digital simulation of system disturbances, 240–241
restoration, 365 Direct current (DC), 9, 112, 126, 269, 353, 360, 375,
saturation, 258–260 376t, 457. See also Alternating current (AC)
Current-operated relays, 369 adjustment of compounding, 85
CVT drives. See Continuously variable transmission circuit breaker, 91f
drives (CVT drives) compound-wound generators, 83–84, 84f
DC-secure power supplies, 89
D drilling motors, 126–127
Damper winding protection, 220 flameproof motor, 60
DARPS. See Differential Absolute and Relative generators, 83
Positioning Sensor (DARPS) loads, 90
Data requirements, 252–254 output current, 83
base values, 252 overvoltage test, 354
operating conditions, 254 parallel operation, 85–87, 87f
synchronous machine parameters, 254t secure alternating current and direct current
system data, 252 power supplies, 9
system diagram, 253f supplies, 112–113
Databases and schedules, 194–202 switchgear, 89
Davy lamp, 305 specification, 90
DC. See Direct current (DC) switching direct currents, 89–90
DCR. See Design and Construction Regulations variable-speed drives, 119
(DCR) Direct on line starting, 109
Dead bus relays, 43 Direct-on-line low-starting-current machines, 101
Deck water seals, 335–336 Directional overcurrent protection, 221–222
Decommissioning, 286 Distorted signal, 275
Decrement factors, 240 Distributed processing units (DPUs), 330
Definite time, 222–223 Distribution
overcurrent protection, 231–232 characteristic, 401f
relays, 229 configuration, 18–21, 19f
Degree of protection, 297 transformers, 280
Degrees of freedom (DF), 401 Diver’s life support equipment, 133–134
DeltaV system, 166–167 Diversity, 178–179
Demand profile, 55 Diving chambers for saturation diving, 136–137
Depressurisation, 14 physiological effects of electricity on humans, 136t