GE Multilin 850

4–224 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
PROTECTION CHAPTER 4: SETPOINTS
G0 REV REACH
Range: -500.00 to 500.00 mS in steps of 0.01 mS
Default: -1.00 mS
This setting defines the pickup level of protection criterion based on the neutral
conductance. Neutral Admittance Ground Fault protection will operate after the set
Pickup Delay time when the neutral conductance quantity, G0, lies below the reach level
defined by this setting. This setting is not applicable when the Direction setting is set to
Forward.
Depending on pick-up threshold (G0) and directional settings, conductance
characteristics are as follows:
B0 FWD REACH
Range: -500.00 to 500.00 mS in steps of 0.01 mS
Default: 1.00 mS
This setting defines the pickup level of the protection criterion based on the neutral
susceptance. Neutral Admittance Ground Fault protection will operate after the set
Pickup Delay time when the neutral susceptance quantity, B0, exceeds this setting. This
setting is not applicable when the Direction setpoint is set as Reverse.
jB
G
Operate
Block
Forward Direction Operate/Block Characteristic
jB
G
Operate
Block
Reverse Direction Operate/Block Characteristic
jB
G
Operate
Block
Non-directional Operate/Block Characteristic
when G0 Fwd Reach ≥ G0 Rev Reach
Operate
G0 Fwd
Reach
G0 Rev
Reach
G0 Fwd
Reach
G0 Rev
Reach
jB
G
Block Operate
Block
G0 Rev
Reach
G0 Fwd
Reach
Non-directional Operate/Block Characteristic
when G0 Fwd Reach < G0 Rev Reach