Page 550 - Offshore Electrical Engineering Manual

Index 537

RCD, 134 Routine maintenance, 164
Reactances, 233–235 ROV. See Remotely operated vehicles (ROV)
Reactive power, 41 RTDs. See Resistance temperature devices (RTDs)
Real and reactive power, 265–269 % Running Load indication, 217
Real power available from prime mover, 37 Ruston ‘Rustronic’ governor, 51
Reciprocating
engines S
diesel, 53 Sacrificial cathodic protection anodes, 344
fuel gas pressure, 54 Sacrificial metal, 295
gas-ignition, 53 Safe and hazardous area ventilation, 17–18
pumps, 124–125, 126f Safeguards, 448
Recombination cells, 115 Safety, 383
Reduced voltage starting, 101 critical systems, 336
Redundancy, 178–179, 387–388 function, 445
Regulation, 41–42 instrumented control function, 445
Reinforced glass fibre (grp), 286 issues, 178–179
Relay box, 284 of offshore electrical environment, 13
Reliability, 53 safety-critical systems, 170–171
analysis, 387 safety-related system, 167–168
block diagrams, 394, 398–400, 399f, 402f Safety and Environmentally Critical Elements
circuit breaker illustration, 388–393 (SECEs), 415, 417, 420f–421f, 431
confidence limits, 400–401, 402t Safety Case Regulations (SCR), 15, 165, 169, 287,
duplication and redundancy, 387–388 341, 414–415
examples, 403–406, 405f–406f, 405t Safety Critical Elements (SCEs), 16
fault trees, 393–398 Safety instrumented function (SIF), 445–446
FMECA, 388, 389f–390f protection function, 445
reliability-centred maintenance scheduling Safety instrumented system (SIS), 446
system, 409 Safety integrity levels (SILs), 170–171, 445
Remotely operated vehicles (ROV), 134 assessment for electrical engineers, 445
Removal/abandonment phases, 286 assessment process, 446–447
Reporting activities, 429–430 calculation, 450t
Residual earth fault relays, 370, 371f instrumentation, 448
Resistance PFD avg , availability of safety system, risk
resistance/time characteristics, 379–380 reduction and SIL values, 447t
temperature rise measurement method by, 30 process, 447
Resistance temperature devices (RTDs), 208, 375 safeguards, 448
Resonance effects, 274 safety function, 445
Respiratory gas heaters, 133–134 SIF, 445–446
Restoration, 362, 365 SIS, 446
Restricted earth fault and test interval for tested loop, 449t
protection, 212 Salt spray, 295
relays, 370–371, 372f Salt-laden air, 295
Retention of verification records, 430 SART. See Search and Rescue Transponder (SART)
Reverse power, 220 Saturation diving, diving chambers for, 136–137
rms. See Root mean square (rms) Scaffolding, 408–409
Rogowski coils, motor fault detection on large SCEs. See Safety Critical Elements (SCEs)
motors with, 220 Scheme activity list, 424–426
Room index, 151 SCR. See Safety Case Regulations (SCR); Silicon
Root mean square (rms), 119, 274, 378 controlled rectifier (SCR)
Rotary table, 457 Sealed cells, 116–117
Rotor Sealed silicon-filled type, 82, 173
faults, 209 Search and Rescue Transponder (SART), 179
field windings, 350 Season cracking, 295