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2.18
SEL-787 Relay
Instruction Manual
Date Code 20081022
Installation
AC/DC Control Connection Diagrams
Voltage Connections
With the voltage inputs option, the AC voltages may be directly connected,
wye-wye VT connected, open-delta VT connected, or a single-phase VT can
be used.
and
show the methods of connecting single-
phase and three-phase voltages.
Figure 2.16
Single-Phase Voltage Connections
NOTE:
Current limiting fuses in
direct-connected voltage applications
are recommended to limit short circuit
arc flash incident energy.
A
B
C
EO1
EO2
EO3
EO4
Single Phase-to-Neutral VT Connection
Single Phase-to-Phase VT Connection
SEL-787
F1
A
B
C
EO1
EO2
EO3
EO4
SEL-787
F1
Note: The VT secondary circuit must be grounded in the relay cabinet.
Содержание SEL-787
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