GE 750 Instruction Manual page 197

CHAPTER 5: SETPOINTS

SENSITIVE GND
DIRECTIONAL
750 FEEDER MANAGEMENT RELAY – INSTRUCTION MANUAL
FIGURE 5–19: Sensitive Ground IOC Logic
Sensitive Ground Directional Overcurrent
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PATH: SETPOINTS S5 PROTECTION
[]
MESSAGE
MESSAGE
MESSAGE
MESSAGE
The sensitive ground directional feature controls the operation of all sensitive ground
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. Sensitive ground directional can be either voltage, current, or dual polarized.
The sensitive ground current input is always the operating current.
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SENSITIVE GND...
SENSTV GND DIRECTN
FUNCTION: Disabled
SENSTV GND DIRECTN
RELAYS (3-7): -----
SENS GND POLARIZING
Voltage
SENSTV GND DIRECTN
MTA: 315° Lead
MIN POLARIZING
VOLTAGE: 0.05 x VT
S5 PROTECTION

SENSITIVE GND 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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