9.21
Date Code 20170927 Instruction Manual SEL-751 Relay
Bay Control
Bay Control Application Example
Application With Handheld Local Remote Breaker Control Switch
Assume that the handheld local remote breaker control switch status is wired
to IN308 of the relay. In this particular application, when IN308 is asserted, it
implies that the breaker control is in LOCAL mode (or SCADA is cut off).
Enter the following Global, Control Configuration setting:
Application Without Handheld Local Remote Breaker Control Switch
Assume that no handheld local remote breaker control switch is available. In
such case you can program one of the programmable pushbuttons (e.g., PB05)
in conjunction with SEL
OGIC to switch the breaker control between local and
remote. Enter the following settings:
Trip and Close Settings
To be able to perform breaker control from the touchscreen or two-line
display, program the OC and CC bits in the trip and close SEL
OGIC control
equations, respectively.
Enter the following Group settings:
Setting Example Setting Comment
EN_LRC Y Enable local/remote control
Setting Example Setting Comment
LOCAL IN308 Local/remote control selection
Setting Example Setting Comment
Group 1 > Logic 1 > SELOGIC Variables and Timers
ELAT 1
SET01 PB05_PUL AND NOT LT01 Local when LT01 is asserted
RST01 PB05_PUL AND LT01 Remote when LT01 is deasserted
Front Panel
a
a
Use configurable labels to assign PB5A LED to LOCAL and PB5B LED to REMOTE.
PB5ALEDC GO
PB5A_LED LT01
PB5BLEDC GO
PB5B_LED NOT LT01
Global > Control Configuration
LOCAL LT01
Setting Example Setting Comment
TR ORED50T OR ORED51T OR ORED81T
OR REMTRIP OR OC OR SV04T
Trip logic
CL SV03T AND LT02 OR CC Close logic
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