GE D90 Plus - Page 219

CHAPTER 7: PROTECTION GROUPED PROTECTION ELEMENTS
D90
PLUS
LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL 209
Figure 184: Ground distance zone 2 operation logic
The following figure shows the ground distance scheme logic for zone 1.
Figure 185: Ground distance zone 1 logic
The following figure shows the ground distance scheme logic for zone 2. The logic is
analogous for zones 3 through 5.
$&'5
23(132/(23
)/(;/2*,&23(5$1'
*1'',67=3.3$
)/(;/2*,&23(5$1'
*1'',67=3.3%
)/(;/2*,&23(5$1'
*1'',67=3.3&
)/(;/2*,&23(5$1'

PV

PV

PV
$1'
25
'HOD\
6(77,1*
W
SNS

'HOD\
6(77,1*
W
SNS

'HOD\
6(77,1*
W
SNS

*1'',67=23$
)/(;/2*,&23(5$1'
*1'',67=23%
)/(;/2*,&23(5$1'
*1'',67=23&
)/(;/2*,&23(5$1'
*1'',67=23
)/(;/2*,&23(5$1'
7,0(57,0(5
7,0(5
7,0(5
$1'
25
$1'
25
25
1 cycle
1 cycle
870054A4.CDR
AND
AND
AND
OR
AND
OR
Memory
V_1 > 0.80 pu
I_1 > 0.025 pu
Direction
SETTINGS
Shape
Reach
RCA
Reverse Reach
Reverse Reach RCA
Polarizing Current
Non-Homogeneous Angle
Quadrilateral Right Blinder RCA
Quadrilateral Left Blinder
Quadrilateral Left Blinder RCA
RUN
RUN
A ELEMENT
RUN
B ELEMENT
C ELEMENT
OPEN POLE BLK A
FLEXLOGIC OPERAND
OPEN POLE BLK C
FLEXLOGIC OPERAND
Supervision
SETTING
RUN
| IN – 0.05 × I_1 | Pickup=
GND DIST Z1 SUPN
FLEXLOGIC OPERAND
OPEN POLE BLK B
FLEXLOGIC OPERAND
GND DIST Z1 PKP B
FLEXLOGIC OPERANDS
GND DIST Z1 PKP A
FLEXLOGIC OPERANDS
GND DIST Z1 DPO A
GND DIST Z1 DPO B
GND DIST Z1 PKP C
FLEXLOGIC OPERANDS
GND DIST Z1 DPO C
GND DIST Z1 PKP
FLEXLOGIC OPERAND
SETTING
= Enabled
= Disabled
Function
= Off
Block
TIMER
Z0/Z1 Magnitude
Z0/Z1 Angle
Z0M/Z1 Magnitude
Z0M/Z1 Angle
Comparator Limit
Quadrilateral Right Blinder
Voltage Level
SETTING
IA
IB
DISTANCE SOURCE
IC
VAG
VBG
VCG
V_1
I_1
IN
I_2
I_0