Page 630 - Handbook of Electrical Engineering

INDEX 623

Voltage 83 Variable pumping capability for
Zig-zag connected for earthing 358 submersible pumps 396
Transformer construction Variable speed motors and drivers 471, 385,
Conservator type 139 495
Dry-type 137 Variable torque control for submersible pumps
Liquid immersed type 137 396
Oil 138 Ventricular fibrillation of the human heart
Resin insulated 138 351
Sealed tank type 140 Vertical rods 355
Synthetic liquids 138 Virtual time 178
Transformer induced 482 Vital load 3
Transient stability studies 70, 300 Volt drop 64, 79
Transmission link 70 At main switchboard busbars 79
Transmission network 332 Calculation 559
Transmission power, long distance 422 Compensation in motor cables 399
Transmission system 72 Effect of generator impedance 577
Capacitance charging current 72 Full-load running current of motors
Trending of 220
Active power 448 Graphical estimation 125, 580
Engine parameters 448 Harmonic 406
Generator parameters 448 In a transformer 131, 135
Reactive power 448 In cables 209
Turbine In long cables 213
High pressure 22 In long motor feeder cables 159
Low pressure 22 In motor feeder cables 220
Typical data 73 In short cables 209
For switchgear busbars 145 Maximum route length of a motor feeder
Impedances of a transformer 133 cable 220, 223
Nomographical method 125, 584
Per-unit 571
Unbalanced loads 145
Reactive 295
Unbalanced stator currents 322
Resistive 484, 490
Unearthed systems 329
Starting current of motors 220
Uninterruptible power supplies, AC 449
Voltage
Uninterruptible power supplies, DC 451
Control of the rectifier 399
Uninterruptible power supplies, UPS 3
Depressions 210
Upper explosive limit 352
Dip at generator terminals 318
Upstream
Driving earth fault current 366
Coordination of contactor with its fuses
Feedback 399
343, 344
Magnitude error 447
Devices 348
Phase angle error 447
Inverter 450
Phase-to-neutral 235, 339, 499, 502
Source protection characteristics 332
Phase-to-neutral, for lighting circuits 460
Upsteam, fuses 330
Phase-to-phase 339
Upstream switchgear 157, 163 Receiving end 303
Utility grid 72 Recovery of system 307
Utility, large public 306 Reference for AVR 84
Regulation 89
Vacuum 147 Restrained relay 324
Variables Restraining element 326
Receiving-end 68 Restraint of overcurrent relays 316
Sending-end 68 Sending end 303