Handbook of Electrical Engineering

624 INDEX

Voltage (Continued)
Standard 191
Transformer 83
To frequency ratio 399
Unbalanced 339
Voltage source, constant 269

Water table, burial of cables 186
Windings
Connections 136
Delta 136
Letters and numbers 136
Primary of machines 496
Primary of a transformer 131
Secondary of machines 496
Secondary of a transformer 131
Star 136
Zig-zag 136
Work done on the generator 32

Worst case situation

For DC off-set of fault current 287, 503

For design of earth loop impedance 366

For fault making current 149, 492

For generator parameters 73

Fully asymmetrical current 174

Maximum fault making duty 277

Overall derating of cables 206

Slip 122

Still air conditions 252

X-to-R ratio 108, 151, 174, 271, 274, 291,

293, 294, 320, 393

Zenor diodes 347

Zero reference potential 351

Zone 0 hazardous area 254

Zone 1 hazardous area 253

Zone 2 hazardous area 253