Page 234 - Power Quality in Electrical Systems

216 Index

Compensators, dynamic voltage (see Correction methods (Cont.):
Dynamic voltage compensators) electric power supply design,
Component parts (subsystem), of E/G 117–119
sets, 196–197 energy storage as, 170
Computer Business Equipment load equipment design, 114–117
Manufacturers Association (CBEMA) for personal computers, 162
curves, 18–20, 151, 156 for power quality events, 9
Computer shutdown, 1 power-harmonic filters, 119
Computers: for relays, AC, 169–170
digital, 163 for reliability, 113
personal (see Personal computers) standby power systems, 122–126
Conducted EMI: transformers, 120–122
improving, 107 UPSs, 119–121, 164
noise from, 100 voltage disturbances, 111–114
testing for, 106–107 Costs:
Conducted emissions, 21 of poor power quality, 2
Constant voltage transformers (see of standby power system, 190
Ferroresonant transformers) Coupling (see Point of common
Contactor(s): coupling)
AC (see AC contactors and relays) Crest factor, 53–61
DC, 170 Current(s):
Contactor ride-through devices, 10 harmonic, 63–74
Control: neutral, 55–56
detecting, 152–153 Current commutation, 8
dynamic voltage compensators for, Current distortion, 17, 79
152–153 Current probes, 203–204
for E/G set, 197 Current transformer analysis, 205,
Controllers, 162–165 207–213
correction measures for, 164–165 Curves:
data links for, 163 B/H, 72
defined, 162 CBEMA, 18–20
design of, 163, 164 flicker, 39
disturbances to, 163, 164 ITIC, 18–20
inputs to, 163 SEMI F47 curve, 18, 20, 156
power quality events affecting, 162–165 CV transformers (see Ferroresonant
Converter-battery charger, 129 transformers)
Converters: CVT (see Ferroresonant transformers)
boost, 101–104, 186
DC/DC, 104–106 Data links for controllers, 163
flyback, 100, 101 Data processing, automatic, 156
full-bridge, 49 Data sets, UPSs and, 124, 125
half-bridge, 49 DC contactors and relays, 170
power, 49 DC current, 48, 49
push-pull forward, 103 DC waveforms, 50
shunt, 149 DC/DC converters, 104–106
twelve-pulse, 115 boost converters, 101–104
Coolant, for E/G set, 196 flyback converters, 100, 101
Correction methods, 109–126 interharmonics and, 104–106
for AC contactors and relays, 169–170 push-pull forward converters, 103
for contactors, AC, 169–170 (See also Switch mode power supplies)
for controllers, 164–165 Delta battery-inverters, 134
CVTs as, 164, 170 Delta (line-interactive) UPSs, 130–131,
dynamic voltage compensators, 119 191