Schweitzer Engineering SEL-387-0 - Multiple Setting Groups

4.4
SEL-387-0, -5, -6 Relay Instruction Manual Date Code 20170601
Control Logic
Multiple Setting Groups
If settings are changed for a setting group other than the active setting group,
there is no interruption of the remote bits (the relay is not momentarily
disabled).
Multiple Setting Groups
The relay has six (6) independent setting groups. Each group contains the
following:
➤ Configuration Settings
➤ General Data
➤ Differential Elements
➤ Overcurrent Elements
➤ Miscellaneous Timers
➤ SELOGIC Control Equation Sets 1 through 3
➤ Trip Logic
➤ Close Logic
➤ Event Report Triggering
➤ Output Contact Logic
These settings can be viewed or changed via the SHO n and SET n
commands. The settings for selecting which of the six groups is to be active is
contained in the Global Settings area (SHO G/SET G commands).
Active Setting Group
Indication
Only one setting group can be active at a time. Relay Word bits SG1 through
SG6 indicate the active setting group.
For example, if Setting Group 4 is the active setting group, Relay Word bit
SG4 asserts to logical 1 and the other Relay Word bits SG1, SG2, SG3, SG5,
and SG6 are all deasserted to logical 0.
Selecting the Active
Setting Group
The active setting group is selected with
➤ SELOGIC control equation settings SS1 through SS6,
➤ The serial port GROUP n command (see Section 7: Serial Port
Communications and Commands), or
➤ The front-panel {GROUP} pushbutton (see Section 8: Front-
Panel Interface).
SEL
OGIC control equation settings SS1 through SS6 have priority over the
serial port GROUP n command and the front-panel {GROUP} pushbutton in
selecting the active setting group. Within the SS1 through SS6 settings, the
currently active group setting SSn has priority over the other group SSn
variables.
Operation of SELOGIC
Control Equation
Settings SS1 through
SS6
The Global settings contain the set of SELOGIC control equation settings SS1
through SS6. If the SEL
OGIC control equation for setting SSn (n = 1 to 6) is
TRUE (logical state 1), the relay is instructed to go to, or remain in, Setting
Group n.