Date Code 20011205
Serial Port Communications and Commands
10-33
SEL-311A Instruction Manual
See
Breaker Monitor
in
Section 8: Breaker Monitor and Metering Functions
for further
details on the breaker monitor.
CLO Command (Close Breaker)
The
CLO
command asserts Relay Word bit CC for 1/4 cycle. Relay Word bit CC can then be
programmed into the SEL
OGIC
control equation CL to assert the CLOSE Relay Word bit, which
in turn asserts an output contact (e.g., OUT102 = CLOSE) to close a circuit breaker. See
Figure 6.1.
See the
Set Close
discussion, following Figure 6.1, for more information concerning Relay Word
bit CC and its recommended use, as used in the factory settings.
To issue the
CLO
command, enter the following:
==>CLO <ENTER>
CLO <ENTER>
CLO <ENTER>
CLO <ENTER>
Close Breaker (Y/N) ? Y <ENTER>
Y <ENTER>
Y <ENTER>
Y <ENTER>
Are you sure (Y/N) ? Y <ENTER>
Y <ENTER>
Y <ENTER>
Y <ENTER>
==>
Typing
N
<ENTER>
after either of the above prompts will abort the command.
The
CLO
command is supervised by the main board Breaker jumper (see Table 2.3). If the
Breaker jumper is not in place (Breaker jumper = OFF), the relay does not execute the
CLO
command and responds:
Aborted: No Breaker Jumper
GRO
n
Command (Change Active Setting Group)
The
GRO
n
command changes the active setting group to setting Group
n
. To change to settings
Group 2, enter the following:
==>GRO
GRO
GRO
GRO 2
2
2
2
Change to Group 2
Are you sure (Y/N) ? Y <ENTER>
Y <ENTER>
Y <ENTER>
Y <ENTER>
Changing
Active Group = 2
==>
The relay switches to Group 2 and pulses the ALARM contact. If the serial port AUTO
setting = Y, the relay sends the group switch report:
==>
SEL-311A Date: 03/13/00 Time: 10:12:45.627
EXAMPLE: BUS B, BREAKER 3
Active Group = 2
==>
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