W
washer sizes, 1043
waste water treatment, 476-77
water ingress protection, 23, 307-08
water temperature, induction motors, 16
water-cooled motors, 24
watertightness tests, 1097-98
weatherproofing, 21-23, 500
wet test, windings, 264
whisker formation, 444-45
wind-power, 214-17
windings:
ageing, 258
insulation, 255, 257-65
material properties, 257
systems, 258-59
wet test, 264
material properties, 257
moisture condensation, 351
temperatures, 278, 349-51
windmills, see wind-power
wiring methods, 784
withdrawable, see drawout |
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X
XLPE three-core cables, 622, see also cables
Z
zero period acceleration (ZPA), 514-15
ZnO surge arresters, 684-87, 718
Zone 0 specification, 199-200
Zone 1 specification, 199-202
Zone 2 specification, 199, 202
zone faults, 557
ZPA, see zero period acceleration |
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