Page 235 - Power Quality in Electrical Systems

Index 217

Design: Electric power supply systems, 110,
of controllers, 163, 164 117–119
of electric power supply systems, 110, Electrical engineering, 11
117–119 Electric-motor transfers, 199
of load equipment, 110, 114–117 Electromagnetic compatibility (EMC),
of standby power systems, 189–190 2, 99
for UPS equipment, 133 Electromagnetic interference (EMI), 41
Device-under-test (D.U.T.), 107 conducted, 100, 106–107
Digital computers, 163 high-frequencies affecting, 6
Digital semiconductor logic, 163 medical electronics and, 6
Diode rectifiers, voltage-doubler, 148 standards for, 20–23
Diodes, zener, 7 switching frequencies affecting, 99
Dips, voltage (see Sags) Electromechanical transfer switches,
Distortion: automatic, 198
total demand distortion, 78 Electronic devices:
total harmonic distortion, 53 harmonics affecting, 44
voltage (see Voltage distortion) medical, 6
waveform, 42 EMC (see Electromagnetic compatibility)
Distribution: Emergency Off (EMO) Relay,
networks of, 110 165, 166
of voltage sags, 112 Emergency operation, of E/G
Disturbances: set, 197
of AC contactors and relays, EMI (see Electromagnetic interference)
168–169 EMI standards, 20–23
ASDs affected by, 180–181 Emissions, conducted, 21
of contactors, AC, 168–169 EMO Relay (see Emergency Off Relay)
to controllers, 163, 164 EN55022 standard, 23
correction methods vs., 111–114 Energy Star (EPA), 99
detecting, 152–153 Energy storage:
dynamic voltage compensators for, as correction measure, 170
152–153 in flywheels, 139
mitigating voltage disturbances, 10 long-term, 137–138
of relays, AC, 168–169 medium-term, 137
Double (oversize) neutrals, 157 short-term, 137
Double-conversion (online) UPSs, in standby power systems, 137–138
129–130, 133, 191 in UPS equipment, 133
Downtime, 2 UPSs for, 137–138
D.U.T. (device-under-test), 107 (See also specific types, e.g.: Batteries)
Dynamic voltage compensators, 110, 119, Energy storage system (ESS), 137
147–154 Engine, of E/G set, 196
commercial, 153–154 Engineering, electrical, 11
for detecting disturbance and control, Engine-generator (E/G) sets, 110–111,
152–153 194–200
on ITIC curve, 151 component parts of, 196–197
operation of, 147 installation of, 196–197
with PCs, 191 operation of, 197–198
for standby power systems, 190 standards for, 195–196
in standby power systems, 194–200
EC standards (see European Community subsystem of, 196–197
standards) transfer switches in, 198–200
E/G sets (see Engine-generator sets) UPSs and, 110–111, 124, 193, 199
Electric fields, 2 Environmental Protection Agency (EPA),
Electric motors, 5, 173 99