Schweitzer Engineering Laboratories SEL-351 - Page 485

Date Code 20001006 Standard Event Reports, Sag/Swell/Interruption Report, and SER
SEL-351 Instruction Manual
12-19
Column Heading
Corresponding
Elements (Relay
Word Bits) Symbol Definition
KEY KEY * Key permissive trip signal start KEY
asserted.
EKEY EKEY * Echo key EKEY asserted.
ECTT ECTT * Echo conversion to trip condition ECTT
asserted.
WFC WFC * Weak infeed condition WFC asserted.
UBB UBB1, UBB2 1 Unblocking block 1 from DCUB logic
UBB1 asserted.
2 Unblocking block 2 from DCUB logic
UBB2 asserted.
b both UBB1 and UBB2 asserted.
Z3XT Z3XT * Logic output from zone (level) 3
extension timer Z3XT asserted.
DSTR DSTRT * Directional carrier start DSTRT
asserted.
NSTR NSTRT * Nondirectional carrier start NSTRT
asserted.
STOP STOP * Carrier stop STOP asserted.
BTX BTX * Block trip input extension BTX asserted.
TMB A 12 TMB1A, TMB2A 1 MIRRORED BITS™ channel A transmit
bit 1 TMB1A asserted.
2 MIRRORED BITS channel A transmit bit
2 TMB2A asserted.
b both TMB1A and TMB2A asserted.
TMB A 34 TMB3A, TMB4A 3 MIRRORED BITS channel A transmit bit
3 TMB3A asserted.
4 MIRRORED BITS channel A transmit bit
4 TMB4A asserted.
b both TMB3A and TMB4A asserted.
TMB A 56 TMB5A, TMB6A 5 MIRRORED BITS channel A transmit bit
5 TMB5A asserted.
6 MIRRORED BITS channel A transmit bit
6 TMB6A asserted.
b both TMB5A and TMB6A asserted.
Courtesy of NationalSwitchgear.com