Page 625 - Handbook of Electrical Engineering
P. 625
618 INDEX
Protection schemes and systems (Continued) Inductive 99, 174
Over-temperature 540 Negative phase sequence 489
Repeated starting of motors 341 Q-axis sub-transient 488
Single-phase for motors 344 Q-axis synchronous 488
Thermal image 343 Quadrature 274
Thermal image for motors 336, 343 Quadrature axis 62
Time delayed overcurrent for static loads Quadrature axis sub-transient 63
346 Quadrature axis synchronous 62
Underfrequency 11, 540 Quadrature axis transient 63
Underfrequency multi-stage 540 Rotor leakage 101
Undervoltage at high voltage busbars 335 Series connected external 481
Pumps 385, 386, 402 Stator winding leakage, armature leakage
Centrifugal 108, 396 67
For transformers 138 Sub-transient 79, 153, 273, 274, 501, 502
Submersible 394 Synchronous 71, 87, 273, 479
Variable speed drives for 433, 495 Transient 273, 274, 479, 502, 573
Purging systems for motors 386 Zero-phase sequence 489
Reactive power 4, 5
Reactors
Radial interconnecting circuits in relation to
Use of 294
earthing 277, 382
Air-cored 299
Radial, stress pattern in the insulation of cables Dry-type 299
373 Liquid immersed 299
Radiator, for transformers 138 Fault current limiting 295
Ratings Iron-cored 299
Motors 13 Zig-zag connected for earthing 358
ISO for gas turbines 37
Receiving end of a cable 333
Ratio
Receiving end of a transmission link 301
Dynamic to static 306
Receiving end of voltage 303
Generator to motor ratings 581
Reciprocating compressors 345
Power to weight 19
Reciprocating machinery 307
Starting to rated current of an induction
Rectifier-inverter system for soft starting
motor 107, 280, 573, 584
motors 127, 397
Three-speed induction motors 391
Reference
Two-speed induction motors 390 Voltage 84
Voltage-to-frequency, control of air gap flux Points in earthing 382
399 Refrigeration, LNG plants 3
Ratio, X-to-R, see X-to-R ratio 108 Regulation 84
Reacceleration of motors 159, 210, 335, 447, Speed 106
540 Feedback 389
Reactance Of speed 325
Commutating 407 Voltage 89
D-axis sub-transient 488 Voltage, of a transformer 135
D-axis synchronous 488 Relative vapour density 252
D-axis transient 488 Relay coordination, see Protection
Derived 62, 491, 492, 495 Relays, under and over frequency protective
Direct axis 62 11
Direct axis sub-transient 63 Reluctance 67
Direct axis synchronous 62 Residual magnetism 88
Direct axis transient 63 Resistances
External 492 Armature or stator winding 480
Field leakage 68 D-axis damper winding 480
