GE 750 Instruction Manual page 187

CHAPTER 5: SETPOINTS

NEUTRAL
DIRECTIONAL
750 FEEDER MANAGEMENT RELAY – INSTRUCTION MANUAL
FIGURE 5–12: Neutral IOC Logic
Neutral Directional Overcurrent
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PATH: SETPOINTS S5 PROTECTION
[]
MESSAGE
MESSAGE
MESSAGE
MESSAGE
The Neutral Directional feature controls the operation of all neutral overcurrent elements
and allows them to discriminate between forward or reverse faults. Refer to Phase
Directional Overcurrent on page 5–54 for more details on directional principles. Neutral
directional can be either voltage, current, or dual polarized. The calculated neutral current
is always the operating current.

NEUTRAL CURRENT
NEUTRAL DIRECTIONAL
FUNCTION: Disabled
NEUTRAL DIRECTIONAL
RELAYS (3-7): -----
NEUTRAL POLARIZING:
Voltage
NEUTRAL DIRECTIONAL
MTA: 315° Lead
MIN POLARIZING
VOLTAGE: 0.05 x VT
S5 PROTECTION

NEUTRAL DIRECTIONAL
Range: Disabled, Alarm,
Latched Alarm,
Range: Any combination of 3
to 7 Auxiliary relays
Range: Voltage, Current,
Dual
Range: 0 to 359° Lead in
steps of 1
Range: 0.00 to 1.25 x VT in
steps of 0.01
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