Page 1021 - Industrial Power Engineering and Applications Handbook

966 Index

limits of error, current transformers, 475 material constants, 7 12 grounding conductors, 702-3
lines: maximum continuous operating voltage, metering, diesel generators, 507-14
characteristics, 787 593 microprocessor-based relays, 296-9, 77 1-
coupling devices, 738 MCCs see motor control centres 2
lengths, 79C2, 796 measurement: mid-point compensation, 791
system voltage regulation, 785-9, 790- electrical machines, 25 I mine motors, 182
2 ground resistance, 701-2 minimum oil circuit breakers, 6334, 651-
telephone, 734 power factors, 257 5
transmission, 785-9, 790-2 measuring current transformers, 475-6 mixed dielectric capacitors, 81 1-12
liquid rotor starters, 95 measuring voltage transformers, 458 moisture, 307-8, 710
load angles, reactive control, 794-802 mechanical: moment of inertia formula, 324
loads: braking, 15 1-3 momentary peaks:
bearings, 195-217, 214-15 HT & LT operation verification, 435 current, 488-90
effects, 17-1 8 interlocks, 378-80 metal enclosed assemblies, 4324
power factors, 18 properties of conductors, 915-17 testing, 957
sharing, 526, 527-8 mesh voltage, 705 monitoring:
tests, 256-63 metal enclosed bus systems, 857-902 insulation, 227-8
torque, 35 continuous current capacity, 954 operating conditions, 305-8
transfers, 796 design, 862-4, 872-3 surge arresters, 618
transmission, 195-217 dynamic current testing, 957 MOS controlled thyristors, 114
types, 505-6 field tests, 954, 958 MOSFETs control, 1 13
locked rotors, 2634, 291 frequency voltages, 955, 956 motor control centres (MCCs):
loom motors, 167, 168 impulse voltage withstand, 955, 956 assembly types, 336
loss factors, 260 insulation levels, 955, 956 draw-out chassis, 376-7
LT motors, 308 leakage current measurement, 954 short-circuit tests, 433
cables, 287, 310 minimum sizes, 866 shrouding, 374-5
fuses, 310 momentary peaks, 957 space heaters, 374-5
insulation systems, 222 power frequency voltages, 955, 956 switchgear assemblies, 376-7
relays, 310 protection, 957 motors:
squirrel cage type, 75 rated continuous current capacity, 954 accelerating torque, 47, 48
switches, 310 reactance measurement, 957-8 actuator motors, 176-7
LT systems: recommended tests, 9534 agriculture, 175-6
air circuit breakers, 635 resistance measurement, 957-8 bearings, 195-217
bus systems, 860 routine tests, 953-4, 958 braking, 97, I1 1, 147-56
cables, 535-6 seismic disturbances, 954 cable selection, 314-17
current release protection, 681-4 service conditions, 862-4, R69-72 card motors, 167, 168
fault levels, 350-6 short-circuit effects, 864-9 centrifuges, 169-70
ground faults, 6814 solar radiation effects, 957 collieries, 182
grounding, 668-9 standards, 958 commissioning checks, 234
HRC fuse protection, 681-4 temperatures, 954, 956 components, 312-17, 318
switching surges, 571 testing, 95 1-8 control, 1-240
see also LT motors thermal effects, 864-8 d.c. link smoothing, 128-9
trunking system endurance, 958 bipolar junction transistors, 1 12
type tests, 953, 954-8 constant d.c. voltage source, 129
machines: types, 859-62 current sources, 129
quality systems, 245-72 see also bus systems cyclo converters. 127
ratings, 575-6 . metal enclosed switchgear assemblies: Darlington transistors, 112-13
testing, 245, 25C69 busbar testing, 425-9 direct torque, 108-1 1
voltage surges, 575-6 dynamic current, 4324 energy conservation, 134-8
see also electrical machines earthquake engineering, 436-52 feedback dcvices, 11 1
magnetic characteristics, reactors, 847 field tests, 435-6 frequency converters, 127
magnetic couplings, 202 heat losses, 425-6 gate turn-off switches, 115, 125
magnetic fields, enclosures, 935 heat run tests, 427 induction motors, 81-96
magnetic particle braking, 152-3 impulse voltage withstand test, 424 insulated gate bipolar transistors,
maintenance: insulation, 423 113-14
bearings, 235-9 momentary peaks, 432-4 inverter units, 119-25
capacitor units, 82743 quality systems philosophy, 421 MOSFETs, 113
checks on motors, 234-5 recommended test, 421-2 panels, 337-9,507-9,75940,767
controlgear assemblies, 384-7 routine tests, 421, 435 rectifier unit configurations, 120-1
electric motors, 231-9 seismic effects, 436-9 regenerative schemes, 127-8
grounding stations, 704 short-circuit strength, 429-32 silicon rectifiers, 115-16
HT capacitor units, 837-8 standards, 452-3 slip recovery systems, 140-2
insulation, 224-7 temperature rise limits, 424-9 slip-ring induction motors, 81-96
LT capacitor units, 837-8 testing, 41 9-54 soft starting, 13840
switchgear assemblies, 384-7 type tests procedure, 422-35 solid-state technology, 1 11-16
winding insulation, 219-29 see also switchgear assemblies speed variation, 145
manufacture: metal properties, 712, 915 static, 97- 164
capacitors, 809-26 metallized polypropylene capacitors, 8 I 1 static drives, 13845
practices, 372-6 metals: stopping, 140
switchgear assemblies, 372-6 constants, 712 thyristors, 114-16