GE Multilin 850

CHAPTER 4: SETPOINTS PROTECTION
850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 4–227
Figure 4-93: Neutral Admittance Ground Protection logic diagram
894186A1.cdr
Operate Output Relay 1(TRIP)
LED: Alarm
AND
OR
LATCH
S R
RESET
Command
AND
SETPOINT
BLOCK:
Off=0
PICKUP DELAY:
SETPOINT
t
PKP
SETPOINT
Output Relay X
Do Not Operate, Operate
ANDAND
SETPOINT
Configurable
FUNCTION:
Disabled=0
TRIP LATCH ALARM ALARM
OR
MIN VOLTAGE :
SETPOINT
V < Min Voltage
VOLTAGE INPUT :
SETPOINT
J2 V0
I < Min Current
MIN CURRENT:
SETPOINT
DIRECTION: G0 FWD REACH: Y0 REACH: G0 REV REACH: S0 FWD REACH: S0 REV REACH: RUN
MODE:
SETPOINT
G0 Y0 S0
RUN RUN
AND AND AND
jB
G
Y0
Operate
Block
G
Operate
Block
G0
G0 Operate
jB
G
Operate
Block
B0
Operate
B0
SETPOINT
ANGLE CORRECTION:
FLEXLOGIC OPERANDS
Ntrl Admit 1 OP
FLEXLOGIC OPERANDS
Ntrl Admit 1 PKP
t
DOP
ACTUAL VALUES
Ntrl Admit Mag
Ntrl Admit Angle Ntrl Conductance Ntrl Susceptance
)sin(
cos(
Y
Y
Y
YB
YG
Ang
V
(I
MagY

00
00
0
00
RUN
K2 V0 J2 Vaux K2 Vaux CURRENT INPUT:
SETPOINT
J1 I0 K1 I0 J1 Ig K1 Ig
OR
OR
)
)
=
V
(I
0
0
)
= = =
Ɵ
Ɵ
Ɵ
LED: Pickup