GE Feeder Management Relay 750 User Manual

5-46 750/760 Feeder Management Relay GE Multilin
5.6 S5 PROTECTION 5 SETPOINTS
5
Figure 5–13: NEUTRAL DIRECTIONAL VOLTAGE POLARIZATION
The Neutral Directional specific setpoints are described below.
• NEUTRAL POLARIZING: If neutral directional control with both voltage and current polarized elements is desired,
enter Dual. If neutral directional control with only the voltage polarized element is desired, enter "Voltage". If neutral
directional control with only the current polarized element is desired, enter "Current".
• NEUTRAL DIRECTIONAL MTA: Enter the maximum torque angle by which the operating current leads the polarizing
voltage. This is the angle of maximum sensitivity. This setpoint affects voltage polarizing only. Additional information is
provided in the figure above.
• MIN POLARIZING VOLTAGE: This setpoint affects the voltage element only. As the system zero sequence voltage is
used as the polarizing voltage for this element, a minimum level of voltage must be selected to prevent operation
caused by system unbalanced voltages or VT ratio errors. For well-balanced systems and 1% accuracy VTs, this set-
point can be as low as 2% of VT nominal voltage. For systems with high-resistance grounding or floating neutrals, this
setpoint can be as high as 20%. The default value of "0.05 × VT" is appropriate for most solidly grounded systems.
Courtesy of NationalSwitchgear.com

GE Feeder Management Relay 750 Specifications

General

Brand	GE
Model	Feeder Management Relay 750
Category	Protection Device
Language	English