BE1-951
Protection and Control
4-11
SP-GROUP Command
Purpose:
Read/change automatic control settings for setting group.
Syntax:
SP-GROUP<x>[=<sw_time>,<sw_level>,<ret_time>,<ret_level>,<prot_ele>]
Comments: x = 0, 1, 2, or 3 for the appropriate setting group.
SP-GROUP Command Example
1.
Read the setting group automatic operation settings.
>SP-GROUP
SP-GROUP1= 30, 0, 15, 75,51P; SP-GROUP2= 5, 70, 5, 50,51N
SP-GROUP3= 0, 0, 0, 0,793
A transfer to cold load pickup settings (SG1) occurs when the current monitored by the SG0 51P element
is at zero for 30 minutes. A return to SG0 settings happens when the monitored current increases to 75
percent of the SG0 51P pickup setting for 15 minutes.
A transfer to unbalance overload settings (SG2) occurs when the monitored current increases above 75
percent of the SG0 51N pickup setting for 5 minutes. Control will return to SG0 when the current decreases
below 70 percent of the SG0 51N pickup setting for 5 minutes.
SG3 settings are activated whenever the recloser reaches shot 3 in a reclosing sequence. Note that the
sw_time, sw_level, ret_time, and ret_level settings are reported as 0 when 791, 792, 793, or 794 is entered
for the prot_ele parameter, as discussed below.
Logic Override of the Setting Group Control Function
Setting group selection can be overridden to allow manual setting group selection. Manual setting group
control and selection is achieved through HMI screen 2.3.1 or by using the CS/CO-GROUP command. The
CS/CO-GROUP command uses select-before-operate logic. A setting group must be selected using the CS-
GROUP command before the setting group is activated using the CO-GROUP command. The process of
selecting and then placing a setting group in operation is summarized in the following two paragraphs.
Use the CS-GROUP command to select the desired setting group. After the CS-GROUP command is issued,
there is a 30 second window during which the setting group can be activated using the CO-GROUP
command.
Use the CO-GROUP command to activate the setting group already selected. The setting group activated
with the CO-GROUP command must match the setting group selected with the CS-GROUP command. If
the setting group specified in each command doesn’t match or the CO-GROUP command isn’t entered
during the 30 second window, the CO-GROUP command is blocked and an error message is returned.
CS/CO-GROUP commands are executed without having to use the EXIT command to save setting changes.
When a setting group change is made, any subsequent setting change is blocked for two times the duration
of the SGC alarm output time setting. Refer to the SGC Alarm subsection for more information about SGC
Alarm settings.
CS/CO-GROUP Command
Purpose:
Read or change logic override settings for setting group selection.
Syntax:
CS-GROUP[=<mode>]
Comments:
mode =setting group 0, 1, 2, 3 or L. L returns group control to the automatic setting
group logic. <mode> entry of CS-GROUP command and CO-GROUP command must
match or setting group selection will be rejected. If more than 30 seconds elapse after
issuing a CS-GROUP command, the CO-GROUP command will be rejected.
CS/CO-GROUP Command Examples
1.
Read the current status of setting group override.
>CO-GROUP
L
