Schweitzer Engineering Laboratories SEL-787-2 - Page 28

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