Schweitzer Engineering Laboratories SEL-421-4 - Page 647

11.31
Date Code 20171021 Instruction Manual SEL-421 Relay
Relay Word Bits
Alphabetical List
VB113–VB120 Virtual Bit 113–120 249
VB121–VB128 Virtual Bit 121–128 248
VB129–VB136 Virtual Bit 129–136 247
VB137–VB144 Virtual Bit 137–144 246
VB145–VB152 Virtual Bit 145–152 245
VB153–VB160 Virtual Bit 153–160 244
VB161–VB168 Virtual Bit 161–168 243
VB169–VB176 Virtual Bit 169–176 242
VB177–VB184 Virtual Bit 177–184 241
VB185–VB192 Virtual Bit 185–192 240
VB193–VB200 Virtual Bit 193–200 239
VB201–VB208 Virtual Bit 201–208 238
VB209–VB216 Virtual Bit 209–216 237
VB217–VB224 Virtual Bit 217–224 236
VB225–VB232 Virtual Bit 225–232 235
VB233–VB240 Virtual Bit 233–240 234
VB241–VB248 Virtual Bit 241–248 233
VB249–VB256 Virtual Bit 249–256 232
VMEMC Polarizing memory voltage control 3
VPOLV Polarizing voltage valid 18
WFC Weak infeed condition detected 59
X6ABC Impedance inside Zone 6 out-of-step 21
X6T Positive-sequence reactance within Zone 6 reactance blinder 24
X7ABC Impedance inside Zone 7 out-of-step 21
X7T Positive-sequence reactance within Zone 7 reactance blinder 24
XAB1 Zone 1 quad A-B phase element 10
XAB1F Zone 1 quad A-B phase element 274
XAB1H High-speed Zone 1 high-speed quad A-B phase element 283
XAB2 Zone 2 quad A-B phase element 11
XAB2F Zone 2 quad A-B phase element 275
XAB2H High-speed Zone 2 high-speed quad A-B phase element 283
XAB3 Zone 3 quad A-B phase element 11
XAB3F Zone 3 quad A-B phase element 275
XAB3H High-speed Zone 3 high-speed quad A-B phase element 283
XAB4 Zone 4 quad A-B phase element 12
XAB4F Zone 4 quad A-B phase element 276
XAB5 Zone 5 quad A-B phase element 12
XAB5F Zone 5 quad A-B phase element 277
XAG1 Zone 1 quad A-Phase-to-ground element 16
XAG1F Zone 1 quad A-Phase-to-ground element 270
XAG1H High-speed Zone 1 quad A-G ground element 279
Table 11.1 Alphabetic List of Relay Word Bits (Sheet 31 of 34)
Name Description Row