Schweitzer Engineering Laboratories SEL-751 - Page 917

IN.5Index
T–Z
Date Code 20170927 Instruction Manual SEL-751 Relay
Synchrophasors
C37.118 protocol
, I.14
MET PM command
, I.13
Relay Word bits
, I.11
settings, I.4
T
Targets, 8.13
front-panel function
, 8.13
reset targets
, 8.14
view using communications port
, 7.53
Temperature
See Resistance Temperature Detector
(RTD)
Testing
, 11.1–11.17
acceptance testing
, 11.3
commissioning testing
, 11.3–11.7
connection tests, 11.6
maintenance testing
, 11.12
methods
, 11.3, 11.12
relay elements, 11.12
self tests
, 11.13
test connections
, 11.7–11.8
with SER, 11.13
with targets, LEDs
, 11.13
with terminal
, 11.12
Thermal (IEC) element
, 4.91
logic
, 4.94
settings
, 4.94
specifications
, 1.18
Time Code
See IRIG-B Time Synchronization
Touchscreen Display Front Panel
, 8.18
Trip Contact
See also Contact Outputs
fail-safe operation
, 2.26, 4.168
minimum duration time TDURD
,
4.129
wiring diagram
, 2.26–2.27
Trip Reset
front-panel function
, 8.14
Trip Voting
See Resistance Temperature Detector
Trip/Close Logic
, 4.128–4.131
breaker status 52A
, 4.130
factory default, 4.130
logic diagram
, 4.129
minimum trip time TDURD, 4.129
trip equation TR
, 4.129
trip Relay Word bit
, 4.129
trip unlatch ULTRIP, 4.130
Troubleshooting
, 11.16
factory assistance
, 11.17
setting error messages
, 6.6
Two-Line Display Front Panel
, 8.2
Typographic Conventions
, xxviii
U
Undervoltage Elements, 4.97
logic diagram
, 4.99
Upgrade
See Firmware, upgrade instructions
V
Vector shift element, 4.120
Voltages
connections
, 2.28
delta wiring diagram
, 2.29
four-wire wye wiring diagram, 2.29
input settings
, 4.4
example, 4.5
loss of potential
, 4.118
open-delta wiring diagram
, 2.29
phase-to-neutral voltage elements,
4.97
phase-to-phase voltage elements
, 4.97
Z
Z-number, 3.8