CHAPTER 6: SETPOINTS S3 PROTECTION
350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–79
NTRL TOC RESET
Range: Instantaneous, Linear
Default: Instantaneous
The “Instantaneous” reset method is intended for applications with other relays, such as
most static relays, which set the energy capacity directly to zero when the current falls
below the reset threshold. The “Timed” reset method can be used where the relay must
coordinate with electromechanical relays.
NTRL TOC DIRECTION
Range: Disabled, Forward, Reverse
Default: Disabled
This setting provides control to the Neutral TOC function in terms of permitting operation
under fault conditions in the selected current flow direction, and blocking it when faults
occur in the opposite direction.
OUTPUT 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 Neutral TOC
operation. 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
There are three blocking inputs provided in the Neutral TOC menu. One blocking input
going “high” is enough to block the function. The selection for each block can include
Contact input, Virtual Input, Remote Input, or Logic Element.
Courtesy of NationalSwitchgear.com
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