design, 261-263
electrical auxiliaries systems, 7 high set instantaneous overcurrents
protect urn. 903
UV inverse time overcurrents protection, 903
i mpedance. 262 internal faults
protection, 904 neutral earthing, 565 protection. 902-905 tapchangers, 262
Unioaders
barge
coal, electrical services, 843
continuous
coal, electrical services, 842 User distribution frames
telephone cabling, 663
Valve actuators
fuel oil storage, 858 water treatment plant
electrical services. 842
Valves (see also Air admission valves; Blowclown air admission valves; Draft tube valves; Main inlet valves: Pressure reducing valves; Turbine steam valves; Turbine stop valves)
compressed air systems
generator main connections, testing, 315 diesel generators, 784
fuel oil
diesel generators, 788 power systems
performance analysis, 179 Ventilation
battery rooms, 757 control gear, 861
electrical services, 861-862 VHF radio
cranes
control systems. 678 frequencies
power stations, 670 off-site
nuclear emergencies, 734 VHF radio systems
cf UHF radio systems, 670 Viewing ports
enclosures
isolated phase busbars, 310 Virtual time
fuses
definition, 412 Visual calling units, 721 Voltage
auxiliaries power systems, 326 generator main connections, 304 measurement
enclosures, generator main connections, testing. 319 synchronising, 969
switchgear
generators, 340-352 Voltage feedback
battery chargers control boards, 770
Voltage operating range electrical systems
computer reliability analysis, 137 Voltage recovery
power systems
performance analysis, 177 Voltage regulation
cables, 464,468
uninterruptable power supply systems, 59-60 Voltage source converters, 627
Voltage switchgear
generators, 319-320 Voltage transformers
accuracy synchronising. 976
cubicles
isolated phase busbars, 313 design, 278
interposing synchronising, 976
isolated phase busbars, 309 supplies
synchronising, 975 switchgear, 369 synchronising
supplies, 974 Voltmeters
phase angle synchronising, 965
switchgear
low voltage, 405 synchronising, 965
Waisting
cable pulling, 519 Wall seals
isolated phase busbars, 305 Warning hooters
cranes, 817 Warning notices
hydrogen production, 826 Water
cooling
isolated phase busbar, 298 demineralised
cooling, isolated phase busbar, 298 Water carryover
turbines protection, 883
Water churning pumped-storage plant
protection, 913 Water circulating pumps
heating and ventilation, 862 Water cooling
transformers, 235 Water heating plant
electrical services, 862 Water level gauge
Hydrastep, 875 Water make-up tanks
diesel generators, 786 Water pumps
transformers cooling, 239
Water treatment plant electrical control, 840 electrical services, 834-842 power distribution. 838
Waveform analysis battery chargers, 773
Wearing rings cooling water flow
pumped-storage plant, protection, 914 Weather
isolated phase busbars, 310 Weighing
coal
train deliveries, 843
Windings (see also Damper windings; Foil windings) aluminium foil
transformers, 270 cage induction motors, 624 cage rotors
aluminium, 629 conductors
transformers, construction. 206 transpositions, transformers, construction, 208
