Schweitzer Engineering Laboratories SEL-734W, Справочник по полевым условиям эксплуатации

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4.4
SEL-734W and SEL Wireless Current Sensor Field Reference Guide Date Code 20191029
SEL-734W
Front-Panel Operations
Pushbuttons
The following section explains the operation of the local pushbuttons.
RESET Pushbutton
Activate the Manual mode and hold the
RESET
pushbutton for three seconds to
reset the following features:
➤
Hunting latch
➤
Fault latch
➤
Lockout conditions
Press
RESET
to test all of the front-panel LEDs.
CLOSE and OPEN Pushbuttons
These pushbuttons initiate a local capacitor bank switch operation. The controller
delays the operation by the time defined by the Local Close Delay and Local
Open Delay settings. Two LEDs next to each pushbutton indicate the status of the
switch and pending operations. Each pushbutton has two associated LEDs. Both
LEDs indicate the state of the switch. A pending operation is indicated when
either the
OPEN COMMAND LED is flashing and the OPENED LED is off, or the
CLOSED COMMAND
LED is flashing and the
CLOSED
LED is off. Both LEDs flashing
for the
OPEN
or
CLOSE
pushbutton indicates that the controller is operating the
switch and that the OPEN or CLOSE output contact is asserted. A steady OPENED or
CLOSED LED indicates that the switch is open or closed.
To initiate a local close or local open operation, the controller must be in the
Manual mode and the following conditions must be met:
➤
Manual control mode is active
➤
Voltage is greater than the voltage inhibit threshold
➤
The power-up inhibit is not active
Table 4.1 Front-Panel LED Descriptions
LED Label Message Description
CONTROL VOLTAGE
➤
Illuminates when the voltage is within the voltage control band.
➤
Flashes when the voltage is outside of the voltage control band.
➤
Extinguishes when the voltage falls below the voltage inhibit
threshold or rises above the overvoltage trip threshold.
ADAPTED VOLT/VAR
➤
Illuminates when the AVAR processing is active. Refer to
SEL-734W Template Reference Guide for further details.
N/A
➤
Illuminates when the SEL-734W has not received an update
from the SEL-WCS for 5 minutes.
➤
Extinguishes when the SEL-734W starts receiving a current
update from the SEL-WCS.
HUNTING
➤
Illuminates when the hunting or hunting delay inhibits assert.
CAP DISCHARGING
➤
Illuminates while the capacitor bank is discharging.
LOCKOUT
➤
Illuminates when any lockout condition is asserted.
➤
Flashes during the power-up inhibit time.