CHAPTER 6: SETPOINTS S3 PROTECTION
350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–75
The following path is available using the keypad. For instructions on how to use the
keypad, please refer to Chapter 3 - Working with the Keypad.
PATH:
SETPOINTS > S3 PROTECTION > S3 SETPOINT GROUP 1(2) > NTRL DIR
GND (S.GND) DIR FUNCTION
Range: Disabled, Latched Alarm, Alarm, Control
Default: Disabled
When the Alarm function is selected, the alarm LED will flash upon detection of Reverse
direction, and will drop out when the direction changes to Forward. When Latched
Alarm is selected, the alarm LED will flash upon detection of Reverse direction, and will
stay lit (latched) after the direction changes to Forward. The alarm LED can be reset by
issuing a Reset command. Detection of Reverse direction when the Control function is
selected, does not trigger the alarm LED.
GND (S.GND) DIR MTA
Range: 0° to 359° lead in steps of 1°
Default: 315°
This setting sets the Maximum Torque Angle (MTA), for the Ground Directional element to
define the regions of Forward and Reverse directions. For Voltage polarizing, enter the
maximum torque angle by which the operating current leads the polarizing voltage. This
is the angle of maximum sensitivity.
Courtesy of NationalSwitchgear.com
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