Page 409 - Practical Power System and Protective Relays Commissioning

Index 397

differential protection of high-voltage commissioning tests
transmission lines, 262 263 electrical commissioning tests, 26
Unsymmetrical components, 163 165 visual checks, 26
Unsymmetrical phase-to-phase fault connection components, 130f
analyses, 171 CVT, operation principle of, 126
to earth analyses, 171 double-pole, 125f
Unsymmetrical phasors, symmetrical electromagnetic VT, operation principle of,
components of, 165 123 125
Unsymmetrical single-phase equivalent circuit, 125f
fault analyses, 170 inductive, 124f, 126f
open-circuit fault analyses, 172 inductive GIS, 148f
medium-voltage dual-bushing, 124f
OCT and OVT, 128 129
V supervision, 228 229
testing
VA. See Volt-Amperes (VA)
insulation resistance test, 130
Vacuum CB, 88 90, 90f
loop resistance burden test, 131 132,
Ventilation, 91
132f
Vertically-mounted disconnect switch, 133,
polarity test, 130 131, 130f
134f
visual check, 129 130
Very inverse (VI), 202
VT ratio test, 131, 131f
Vibration test, 44
winding resistance test, 131
Visual checks
types and three-phase connections, 128,
AC distribution panel commissioning tests,
128f
29
Voltage-controlled overcurrent protection,
battery charger commissioning tests, 30
242, 243f
battery commissioning tests, 30
Voltage-restrained overcurrent protection,
in CT, 118
242, 244f
current transformer commissioning tests, 25
Voltmeter, 61 62, 159
DC distribution panels commissioning tests,
VT. See Voltage transformers (VT)
29
gas insulated switchgear commissioning
test, 26 27 W
high voltage cables commissioning tests, 27 Way-connected CTs, 115, 115f
power transformer commissioning, 24 Weak infeed in permissive overreach scheme,
protection and control panels 220, 221f
commissioning tests, 28 Wind(ing). See also Three-winding
voltage transformer commissioning tests, 26 transformers
in VT, 129 130 energy, 33 34
Volt-Amperes (VA), 109 farm, 33, 33f
Voltage, 367 insulation resistance measurement, 59 60,
balance test, 44 59f
coil, 210 211 resistance test, 61 62, 119, 131
protection, 247 248 turbine power system protection zones, 34
ratings, 85 Wound primary type CT, 112
ratio test measurement, 60, 61f
waveform, 86f,87
Voltage transformers (VT), 123, 143, 147, X
190, 326. See also Current transformer XCBR logical node, 182
(CT) XLPE. See Cross-linked polyethylene (XLPE)
burdens and accuracy classes, 126 127 XLPE cables, 72
capacitive GIS, 148f XML. See eXtensible Markup Language
capacitive, 124f (XML)