Page 393 - Practical Power System and Protective Relays Commissioning

Index

Note: Page numbers followed by “f” and “t” refer to figures and tables, respectively.

A protection systems, 83
schematic elementary diagram, 9
Abstract communication services interface
transmission, 69
(ACSI), 183
lines, 69 70
Acceleration scheme, 224 225, 225f
Ammeter, 61 62
Access control, 184
AN. See Air natural (AN)
Accuracy classes
Analog channels, 142
current transformer (CT), 109 111
ANCI/IEEE curves overcurrent relay
voltage transformer (VT), 126 127, 127t
characteristic, 209, 209t
Accuracy limit factor (ALF), 109
Acid concentration, 158 Antipumping circuit, 92 93
specific gravity and, 158 Antislamming circuit, 93
ACSI. See Abstract communication services Arc interruption principle,
interface (ACSI) 86 87
Actual power system testing breakdowns in current zero window, 87f
GIS tests, 363 recovery condition in current zero window,
high-voltage transmission line impedance 88f
values, 363 Arcing time, 231
low voltage panels, 363 Arresters, 103
power transformer test, 361 363 Authentication, 184
Advanced adaptive protection functions, Auto-transformers, 53, 54f
197 198 differential protection, 274 275, 275f
with tertiary winding sequence networks,
Air CB, 88, 89f
166, 168f
Air insulated substation (AIS), 9, 99
Automatic voltage regulator, 39
air insulated switchgear line construction,
Autoreclose scheme tests, 338
100f
Autoreclosing
horizontally-upright mounted disconnect
distribution networks with radial reeders,
switch, 100f
235
tank bulk oil circuit breaker, 102f
and equipment, 235
vertical break disconnect switch, 101f
function in distance relay, 231 236
vertically-mounted disconnect switch, 101f
relay cycle
Air natural (AN), 52t
for permanent faults, 224f
Air-gapped CT, 112
for transient faults, 233f
AIS. See Air insulated substation (AIS)
in strong high-voltage networks, 235 236
ALF. See Accuracy limit factor (ALF)
system, 231
Alkaline battery, 159
for transmission lines, 232 234
Alternative current (AC). See also Direct
Autosynchronizing, 356
current (DC)
distribution panel commissioning tests Auxiliary, 35
electrical tests, 29 relays, 189
visual checks, 29 systems, 99
381