Page 631 - Handbook of Electrical Engineering

624 INDEX

Voltage (Continued) Worst case situation
Standard 191 For DC off-set of fault current 287, 503
Transformer 83 For design of earth loop impedance 366
To frequency ratio 399 For fault making current 149, 492
Unbalanced 339 For generator parameters 73
Voltage source, constant 269 Fully asymmetrical current 174
Maximum fault making duty 277
Water table, burial of cables 186 Overall derating of cables 206
Windings Slip 122
Connections 136 Still air conditions 252
Delta 136
Letters and numbers 136 X-to-R ratio 108, 151, 174, 271, 274, 291,
Primary of machines 496 293, 294, 320, 393
Primary of a transformer 131
Secondary of machines 496 Zenor diodes 347
Secondary of a transformer 131 Zero reference potential 351
Star 136 Zone 0 hazardous area 254
Zig-zag 136 Zone 1 hazardous area 253
Work done on the generator 32 Zone 2 hazardous area 253