Date Code 20020129
Front-Panel Interface
8-13
SEL-387E Instruction Manual
Table 8.2: Correspondence Between Local Control Switch Types
and Required Label Settings
Local Switch Type
Label NLBn
Label CLBn
Label SLBn
Label PLBn
ON/OFF
X X X
OFF/MOMENTARY X X X
ON/OFF/MOMENTARY
X X X X
Disable local control switches by “nulling out” all the label settings for that switch. The local bit
associated with this disabled local control switch is then fixed at logical 0.
Factory Settings Examples
Local bits LB3 and LB4 are used in a few of the factory SEL
OGIC
control equation settings for
manual trip and close functions. Their corresponding local control switch position labels are set
to configure the switches as OFF/MOMENTARY switches:
Local Bit Label
Settings Function
LB3
NLB3 = MANUAL TRIP 1
trips breaker and drives reclosing relay to
lockout
CLB3 = RETURN
OFF position (“return” from MOMENTARY
position)
SLB3 =
ON position – not used (left “blank”)
PLB3 = TRIP
MOMENTARY position
LB4
NLB4 = MANUAL CLOSE 1
closes breaker, separate from automatic
reclosing
CLB4 = RETURN
OFF position (“return” from MOMENTARY
position)
SLB4 =
ON position – not used (left “blank”)
PLB3 = CLOSE
MOMENTARY position
View Local Control (With Factory Settings)
Access local control via the CNTRL pushbutton. If local control switches exist (i.e.,
corresponding switch position label settings were made), the following message displays with
the rotating default display messages.
Press CNTRL for
Local Control
Press the CNTRL pushbutton, and the first set local control switch displays (shown here with
factory default settings).
