Schweitzer Engineering Laboratories SEL-351-5, Instruction Manual

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11.8
SEL-351-5, -6, -7 Relay Instruction Manual
Date Code 20070117
Front-Panel Interface
Functions Unique to the Front-Panel Interface
If the breaker is closed, the reclosing relay reset timer times out (e.g., 79RSLD
= 300), the relay goes to the reset state (front-panel
LO LED extinguishes and
RS LED illuminates), and the shot counter returns to 0. The reclosing relay
shot counter screen appears as:
Local Control
Use local control to enable/disable schemes, trip/close breakers, etc., via the
front panel.
In more specific terms, local control asserts (sets to logical 1) or deasserts
(sets to logical 0) what are called local bits LB1 through LB16. These local
bits are available as Relay Word bits and are used in SEL
OGIC®
control
equations (see Rows 25 and 26 in Table 9.5 ).
Local control can emulate the following switch types in Figure 11.5 through
Figure 11.7 .
Figure 11.5 Local Control Switch Configured as an ON/OFF Switch
Figure 11.6 Local Control Switch Configured as an OFF/MOMENTARY Switch
Figure 11.7 Local Control Switch Configured as an ON/OFF/MOMENTARY
Switch
Local control switches are created by making corresponding switch position
label settings. These text label settings are set with the
SET T command or
viewed with the SHO T command via the serial port [see Section 9: Setting
the Relay and SHO Command (Show/View Settings) on page 10.26 ]. See Local
Control Switches on page 7.6 for more information on local control.
SET RECLOSURES=2
RECLOSE COUNT =2
SET RECLOSURES=2
RECLOSE COUNT =0
Logical 1
LBn
(n = 1 through 16)
ON Position
OFF Position
(Logical 0)
Relay
Word
Bit
Logical 1
LBn
(n = 1 through 16)
OFF Position
(Logical 0)
MOMENTARY Position
Relay
Word
Bit
Logical 1
LBn
(n = 1 through 16)
ON Position
OFF Position
(Logical 0)
MOMENTARY Position
Relay
Word
Bit