Page 1015 - Industrial Power Engineering and Applications Handbook

960 Index
bus systems (conrd) multicore skin effects, 547 protection, 82743
insulator suitability, 898-9 optical fibre, 739 rating, 760-3, 818-21
interleaving phases, 888-9 paper insulated, 534. 539-41 regulation improvement, 779
isolated phase systems, 861 proximity effects, 547 restrike voltage, 730
joints, 903-12 rating factors, 545-6 routine tests, 838-9
LT systems, 860 selection, 314-17, 53149 safety, 829-37
metal enclosed, 857-902 service conditions, 544 selection, 818-21
nomograms, 866-8 short-time rating, 547-8 self-healing type, 8 1 1, 8 I4
non-segregated, 859 skin effects, 547 series reactor compensation, 747-8
overhead, 862 standards , 548-9 single-capacitors switching, 75 1-2
phases, 888-90 technical details, 544 single-phase motors, 27-8, 30-1
power frequencies, 955, 956 temperatures, 545 special purpose units, 818
proximity effectq, 878-90, 886-90 termination, 548 standards, 773, 824-5. 842
reactance, 879-82, 957-8 three-core armoured, 538-9 star banks, 816-18
reactors, 884-5 trenches, 3867 starting motors, 27-8, 30-1
resistance measurement, 957-8 voltage drop, 544-7 surges, 729-32
rising mains, 861-2 XLPE three-core, 534 switching, 725-75, 768-9
saturated reactors, 884-5 cage induction motors see squirrel cage inrush, 750-4
segregated, 85940 induction motors overvoltages, 729-32
seismic effects, 872 capacitative currents, 569-7 1 sequences, 768-9
service conditions, 370-1, 869-72 capacitor voltage transformers (CVTs), system voltage regulation
short-circuit effects, 864-9 4644 improvement, 779
skin effects, 873-8 capacitors, 723-854 test requirements, 83841
spacing, 888 ampere meter method, 833-4 testing, 82743, 842, 843
standards, 901-2 application, 727 thermal stability. 839-40
thermal effects, 864-8 automatic control panels, 767 type tests, 83941
transmission, 857-902 banks, 835 ungrounded units, 730-1
transposition, 889-90 HT systems. 780 unit manufacture, 814-15
types, 859-62 manufacture, 8 15-1 8 unit standards, 824-5
vertical, 861-2 behaviour, 725-75 voltage regulation improvement, 779
vibration, 872 charging currents, 750-4 voltage unbalance, 83 1-2
voltage drop, 872-3 charts, 761,762 voltage variation, 834
voltage unbalance, 8824 component rating/selection, 8 18-2 1 see also power capacitors
see also isolated phase bus systems; control panels, 767 captive power generation, 331-551
metal enclosed bus systems current unbalance, 833 diesel generators, 499-500
busbars: dielectrics, 8 13 driving torque, 516, 520
aluminium properties, 922-3 direct switching induction motors, 76 I2 field systems, 502-3
bending, 91 I discharge devices, 8 19-24 load sharing, 526, 527-8
channel properties, 924 double star arrangement, 749 load types, 505-6
configuration, 890 element manufacture, 81 1-12 operating parameters, 500-3
enclosures, 890 excessive charging currents, 750-4 operation procedures, 521-6
fittings, 877 field operating conditions, 841 operation theory, 503-4
metal enclosed switchgear assemblies formulae, 774-5, 825-6, 843 parallel operation, 5 15-26
testing, 425-9 frequency variation, 834 programmable logic controllers, 528-
mounting precautions, 905 grounded star units, 729 30
mounting systems, 368-9 harmonic effects, 732-40 standards, 530
mountings, 897 HT maintenance, 837-8 synchronizing schemes, 526-7
proximity effects, 879-82 HT systems, 780 card motors, 167, 168
reactance, 879-84 induction motors, 760-3 carrier equipment, 738
rectangular, 922 inductive interference, 73240 cascade failure, 8 12
sections, 877 inrush current limitation, 754-9 cast iron grid resistance, 86
shrouds, 378, 379 installation, 837-8 CBCT see core-balanced current
supports, 934 insulation levels, 840 transformers
switchgear assemblies testing, 425-9 internally protected units, 812-14 central processing units. 339
temperature testing, 427 location, 763-5 certification:
tubular properties, 923 low PF effect, 727-8 locations, 266-9
LT maintenance, 837-8 machines, 266-9
maintenance, 82743 certifying authorities, 183
cables: manufacture, 809-26 channcl busbar properties, 924
armoured, 534, 541-3 metallized polypropylene, 8 1 1 charging currents. capacitors, 750-4
HT, 538 mixed dielectric, 81 1-12 chemical oxygen demand (COD), 417
LT, 535-6 operation, 72840 chemical resistance starting, 78
three-core, 538-9 panel design parameters, 759-60 chemical vapour classification, 179
copper, 537 parallel switching, 73 1, 7524 chokes see saturated reactors
derating factors, 544 partial discharge tests, 841 circle diagrams, 18-20, 157
HT, 538 PCB-filled, 838 circuit breakers, 317
insulation, 53142 performance, 7334 air blast, 635-7
comparison, 532-3 PF improvement, 761,762 air type, 634-5
LT, 310,5354 power factor improvement, 725-75 bulk oil, 632
motors, 310 precautions, 838 ground leakage. 679-8 1