Schweitzer Engineering Laboratories SEL-787-2 - Page 27

Schweitzer Engineering Laboratories, Inc. SEL-787-2, -3, -4 Data Sheet
27
Relay Panel Diagrams
SEL-787-4X Front Panel
Figure 38 Front Panel With Default Configurable Labels
SEL-787-4X Rear and Side Panels
(A) Rear-Panel Layout (B) Side-Panel Layout
Figure 39 SEL-787-4X With Single Copper Ethernet, 8 DI, and RTD Option
BRKR4
CLOSED/OPEN
SELECTED
LOCK
DISABLED
ENABLED
CLOSE
BREAKER CLOSING
TRIP
BREAKER OPENING
AUX 1
BRKR3
CLOSED/OPEN
SELECTED
BRKR2
CLOSED/OPEN
SELECTED
BRKR1
CLOSED/OPEN
SELECTED
SEL-787
TRANSFORMER PROTECTION RELAY
ENABLED
TRIP
DIFFERENTIAL
INST OC
TOC
87-1
87-2
87-3
Relay Powered Properly/Self-Tests are Okay
Trip Occurred
Differential Trip
Instantaneous/Definite Time-Overcurrent Trip
Inverse Time-Overcurrent Trip
Differential Element 1 Trip
Differential Element 2 Trip
Differential Element 3 Trip