GE Multilin 850

CHAPTER 4: SETPOINTS PROTECTION
850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 4–205
Figure 4-85: Logic Diagram of UV Reactive Power Protective Function (1 of 2)
WYE
VAG
VBG
VCG
SETPOINT
Configurable
FUNCTION:
Disabled
Trip
SETPOINT
BLOCK:
Off=0
AND
Operate Output
Relay 1(TRIP)
LED: Trip
LED: Alarm
AND
OR
LATCH
S
R
RESET
Command
UV Var PKP
FLEXLOGIC OPERANDS
UV Var OP
SETPOINT
Output Relay X
Do Not Operate, Operate
OR
Latched Alarm
Alarm
Pwr1 Reactive
Actual Values
Reactive Power From Metering\Power 1(2)
J1I_1
Actual Values
Pos. Seq. Current
From Metering\CT Bank 1 -J1
PICKUP VOLTAGE:
SETPOINT
VA < Pickup Voltage
Curr Superv Level:
SETPOINT
I1 ≥ Current Sup.Level
PICKUP VARS:
SETPOINT
|Vars| < Pickup Vars
when
Var Direction = Forward
|Vars| > Pickup Vars
when
Var Direction = Reverse
VAR DIRECTION:
Pickup Delay:
SETPOINT
t
PKP
t
DPO
Dropout Delay:
Voltage Mode*:
SETPOINT
When MODE
=
Phase to Ground
,
VA = VAG, VB=VBG, VC=VCG
When MODE = Phase to Phase
VA = VAB, VB=VBC, VC=VCA
VB < Pickup Voltage
VC < Pickup Voltage
AND
VOLTAGE CONNECTION
AND
AND
To sheet 2 of 2
DELTA
VAB
VBC
VCA
3-Ph Voltages from VT Bank 1 -J2
VOLTAGE CONNECTION
VA = VAB, VB=VBC, VC=VCA
* MODE setting is only applicable
when VT Connection = Wye
1
2
VA VB
VC
To sheet 2 of 2
To sheet 2 of 2
LED: Pickup
SETPOINT
SIGNAL INPUT:
Vars = Pwr1 Reactive
when Signal Input = Power 1
Vars = Pwr2 Reactive
When Signal Input = Power 2
Pwr2 Reactive
894190A2.cdr