Page 406 - Practical Power System and Protective Relays Commissioning

394 Index

Secondary injection tests (Continued) Stabilizing resistance, 260
transformer differential protection, Stabilizing resistor, 256, 257f
344 347 Stalling protection, 250
Secondary voltage, 54 55 Standard inverse (SI), 195, 202
Secondary winding, 105 Star/delta connection, 53, 53f
Security, 191 Static protection relay, 196 197
of IEC-61850, 184 static analog relays, 197f
Selectivity, 191, 191f static digital relays, 197f
Self-blast circuit breakers, 145, 146f Static relays, 194
Sensitivity Station level substation, 181
factor, 282 Stator, 35
test, 353 earth fault protection, 236 239, 239f
Sequence impedance networks, 165 170, Steady-state stability
166f limit, 40
power transformer sequence networks, of synchronous generators, 40
166 170 Steady-state value of SC current, 215
Sequence of event recorder, 141 Stubs protection, 230 231, 231f
Sheath voltage limit test (SVL test), 77, 78f Subcontractors, 379
Short circuit (SC), 215, 330 Substation automation system (SAS), 179,
characteristic test, 44 184, 185f, 201
impedance voltage, 62 Substation configuration description (SCD),
load losses, 62 183 184
secondary winding, 63 Substation configuration language (SCL),
Short-circuit ratio (SCR), 40 183 184
Shunt reactors and capacitors, 2 security of IEC-61850, 184
Shunt resistor, 303, 306 setting up protocols using IEC 61850, 184
SI. See Standard inverse (SI) Substation(s), 2, 9
Silica gel, transformer, 58 and busbar layouts, 10 17
Simple balanced beam relay, 210, 211f commissioning
Simplicity, 191 schedule and resources, 19
Single busbar arrangement, 11, 15f work, 369
Single line diagrams (SLD), 9, 10f, 192 components, 141
Single phase to earth fault, 170 171, 171f, control system, 200f, 201
175, 176f electrical diagrams, 9 10
Single shot autoreclosing, 232 connection or wiring diagram, 9 10
Single-phase open-circuit fault, 172, 172f interconnection diagram, 10
SIR. See System impedance ratio (SIR) schematic/elementary diagram, 9
Site acceptance test (SAT), 180t, 325 SLD, 9
Site inspections, 58 energization of substation test, 366 368
Site installation manager, 379 fault recorders in, 141
SLD. See Single line diagrams (SLD) load break switches, 17
Snags list, 24 switchgear in generating stations, 17 21
Solar energy, 32 33 Subtransient and transient SC, 215
Solid earthing, 277 279 Sulfur hexafluoride (SF 6 ), 90
SOTF. See Switch to fault (SOTF) cables, 71
Specific gravity and acid concentration, 158 CB, 90 91
Speed, 191 contaminants, 90
SSD. See System specification description precautions, 91
(SSD) properties of sulfur hexafluoride gas, 90
Stability related standards, 90 91
load test, 341 testing for contamination, 91
loss of stability state, 40 CB, 144 145