CHAPTER 6: SETPOINTS
S3 PROTECTION
350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
6–101
AUX UV FUNCTION
Range: Disabled, Alarm, Latched Alarm, Trip
Default: Disabled
The selection of the Latched Alarm, Alarm, or Trip setting enables the Auxiliary UV
function. The output relay #1 “Trip” will operate if the function is selected as a Trip, and
the auxiliary voltage is below the AUX UV PKP setting for a time greater than the selected
AUX UV DELAY time. The “ALARM" LED will not turn on if the auxiliary UV function is set to
Trip. The “ALARM" LED will flash upon UV operation, with the aux. UV function selected as
Alarm, and will self-reset when UV operation clears. If Latched Alarm is selected as a
aux. UV function, the “ALARM" LED will flash during the UV condition, and will stay “ON”
after the condition clears, until the reset command is initiated. The output relay #1 “Trip”
will not operate if the Latched Alarm or Alarm setting is selected. Any or all of the output
relays 3 to 6 can be selected to operate when the auxiliary UV function is selected as
Latched Alarm, Alarm, or Trip.
AUX UV PKP
Range: 0.00 to 1.25 x VT in steps of 0,01
Default: 0.75 x VT
This setting defines the auxiliary UV pickup level.
AUX UV CURVE
Range: Definite Time, Inverse Time
Default: Inverse Time
This setting selects the type of timing-inverse time/definite time, to define the time of
aux. undervoltage operation based on selected UV time delay, and the actual
undervoltage condition with respect to the selected UV pickup.
AUX UV DELAY
Range: 0.1 to 600.0 sec in steps of 0.1 sec
Default: 2.0 s
This setting specifies a time delay used by the selected “AUX UV CURVE” type of timing to
calculate the time before UV operation.
AUX UV MIN VOLTAGE
Range: 0.00 to 1.25 x VT in steps of 0,01
Default: 0.30 x VT
The minimum operating voltage level is programmable to prevent undesired UV
operation before voltage becomes available.
OUTUT RELAY 3 to 6
Range: Do not operate, Operate
Default: Do not operate
Any or all of the output relays 3 to 6 can be selected to operate upon an Auxiliary UV
condition. The selection of relay outputs operation is available no matter whether
Latched Alarm, Alarm, or Trip function is selected.
BLOCK 1/2/3
Range: Off, Contact Input 1 to 10[8], Virtual Input 1 to 32, Remote Input 1 to 32, Logic
Element 1 to 16
Default: Off
Three blocking inputs are provided in the Auxiliary UV menu. One blocking input “high” is
enough to block the function. The available selections for each block include Contact
input, Virtual Input, Remote Input, or Logic Element.
