Schweitzer Engineering Laboratories SEL-787-2 Manual page 28

28
SEL-787-3E/S Front Panel
Relay Powered Properly/Self-Tests are Okay
Instantaneous/Definite Time-Overcurrent Trip
Figure 40 Front Panel With Default Configurable Labels
SEL-787-3E Rear and Side Panels
(A) Rear-Panel Layout
Figure 41 SEL-787-3E With Dual-Fiber Ethernet, EIA-232 Communication, 3 DI/4 DO/1 AO Option
SEL-787-2, -3, -4 Data Sheet
Trip Occurred
Differential Trip
Inverse Time-Overcurrent Trip
Over-/Undervoltage Trip
Over-/Underfrequency Trip
Volts/Hertz Trip
TRANSFORMER PROTECTION RELAY
SELECTED
ENABLED
BRKR1
TRIP
CLOSED/OPEN
DIFFERENTIAL
SELECTED
BRKR2
INST OC
CLOSED/OPEN
TOC
SELECTED
BRKR3
O/U VOLT
CLOSED/OPEN
O/U FREQ
AUX 2
V/Hz
(B) Side-Panel Layout
Schweitzer Engineering Laboratories, Inc.
SEL-787
ENABLED
LOCK
DISABLED
BREAKER CLOSING
CLOSE
BREAKER OPENING
TRIP
AUX 1