Page 457 - Offshore Electrical Engineering Manual

444 CHAPTER 2 Preparation and Use of Performance Standards

Parameter Example of Equipment/Systems Appropriate to Parameter
Equipment Performance Generators
Standard of Equipment TEMPSC communications, Standby Vessel communications
Suitability of equipment for Electrical equipment in potentially hazardous areas, Ingress protection
operating environment of equipment
Adequately/correctly Sized Switchboards, cables, motors, UPS batteries
Initiate other actions Executive actions initiated by fire/gas detection system or by detection
of process deviation
Closure Time Valves, fire dampers (by actuators)
Failure Mode Valve position on loss of power or pressure in actuating medium
Response Time Detectors, equipment trip, blowdown
Duration For emergency lighting, survivability of RESDVs and TR
Location/orientation Emergency control points, HVAC inlets relative to hazardous areas,
emergency lighting.
Position/Status Valves locked open/closed
Status Indication F&G system, ESD valve status, fire damper status, alarm status
Reliability (or PFD) ESD/PSD system, Fire & Gas system and components
Availability ESD/PSD system, Fire & Gas system and components
Distribution/Coverage Detectors, firewater, emergency lighting, PA system and beacons
Redundancy Separate PA systems, UPS, voted sensors, valve actuation
Segregation Dual UPS supply cabling, dual PA system cabling and PA amplifier
racks, Emergency generator (from main generation), subsidiary control
and communication room (from CCR)
Accessibility and operability Safety equipment, escape routes, triage areas (including adequate
emergency lighting)
Resistance to Fire ESD valves, Temporary Refuge, fire dampers, cables
Resistance to Explosion See Segregation
Resistance to Vibration Fire & Gas Detectors, process instrumentation, navaid lighting
Resistance to Dropped Objects See Segregation
Resistance to Impact Ballast control system on MODUs and FPSOs (to preserve stability)
Resistance to Mechanical Damage Protection of cables, valve hydraulic/pneumatic vent lines, cable
armouring.
Protection against Upset Conditions Provision and set-points of piping system instrumentation
Compatibility Electromagnetic Compatibility
Corrosion Protection Impressed current cathodic protection
Prevent potentially unsafe mode of Ballast control system, power management system, process monitoring
operation and control system(s)

FIGURE 9.2.2
Checklist of Parameters to be considered for performance standards relating to electrical
equipment and instrumentation. ESD, emergency shutdown; FPSO, floating production,
storage and offloading; HVAC, heating, ventilation and air conditioning; MODU, mobile
offshore drilling unit; PA, public address; PFD, probability of failure on demand; PSD,
process shutdown; UPS, uninterruptible power supply.