Schweitzer Engineering SEL-351P - Page 145

Date Code 990215 Factory-Set Logic 1-49
SEL-351P Manual Técnico
Other Operator Controls
The following figures:
•
Figure SECTION 1: .38 (RELIGAMENTO HABILITADO)
•
Figure SECTION 1: .39 (REMOTO HABILITADO)
•
Figure SECTION 1: .41 (SEF HABILITADO)
•
Figure SECTION 1: .42 (PROTEÇÃO BLOQUEADA)
operate similarly to
Figure SECTION 1: .37. Note that the BLOQUEIO operator control logic
supervises the operator controls in these figures, too.
RELIGAMENTO HABILITADO Operator Control
Figure SECTION 1: .38 (RELIGAMENTO HABILITADO) has additional logic that resets latch
LT2 (LT2 = logical 0) if the reclosing relay is defeated. If the reclosing relay is defeated, the
RELIGAMENTO HABILITADO operator control is effectively disabled – the corresponding
LED (LED2 = LT2) is always extinguished. Make setting Reclose interval 1 = 0 to defeat
reclosing and all three reclosing relay-state Relay Word bits (79RS, 79CY, and 79LO) deassert to
logical 0.
SEL OGIC settings
SET2
(set)
(reset)
Relay
Word
Bits
PB2
Relay
Word
Bit
LT2
DWG: MP351P028
RELIGAMENTO
HABILITADO
operator control
LED setting
LED2 = LT2
RELIGAMENTO
HABILITADO
operator control
pushbutton
(pulsed output - see
Figure 1.33)
BLOQUEIO operator
control OFF (see
Figure 1.44)
RELIGAMENTO
HABILITADO
operator control ON
(LT2 = logical 1)
LT4
Reset state
Reclose cycle state
Lockout state
79RS
79CY
79LO
Reclosing relay defeated
RST2
LT2 is used in the
79DTL (drive-to-lockou
t
SEL OGIC setting (See
Figure 1.25)
Figure SECTION 1: .38: RELIGAMENTO HABILITADO Operator Control LED
and Logic Application
REMOTO HABILITADO Operator Control
As stated in
Figure SECTION 1: .39 (REMOTO HABILITADO), latch LT3 is not used in any of
the factory-set logic. Each press of the REMOTO HABILITADO operator control pushbutton
toggles latch LT3 from LT3 = logical 0 to LT3 = logical 1 and vice versa, but LT3 is not used in
any of the factory-set logic. Thus the REMOTO HABILITADO operator control is not
functional from the factory (corresponding LED is extinguished all the time, too; SEL
OGIC
setting LED3 = 0, see
Figure SECTION 1: .31).