Distance Relay Settings
GARD 8000 Distance Relay
RFL Electronics Inc.
Description Range
Units
Step
Default
81D-2 ROC frequency pickup
Pickup threshold for rate-of-change of frequency, step 2
-10 - -0.5
Hz/s
0.01
-1
81D-2 ROC frequency time delay
Pickup time delay for rate-of-change of frequency, step 2
0 - 300
s
0.01
0
81D-2 Dropout Time
Drop-out time delay for rate-of-change of frequency, step 2
0 - 300
s
0.01
2
81D-3 Frequency rate-of-change (ROC) enable
Enables rate-of-change of frequency, step 3
No - Yes
-
1
No
81D-3 ROC underfrequency pickup
Pickup threshold for underfrequency for the rate-of-change of
frequency element, step 3
40 - 70
Hz
0.01
40
81D-3 ROC frequency pickup
Pickup threshold for rate-of-change of frequency, step 3
-10 - -0.5
Hz/s
0.01
-1
81D-3 ROC frequency time delay
Pickup time delay for rate-of-change of frequency, step 3
0 - 300
s
0.01
0
81D-3 Dropout Time
Drop-out time delay for rate-of-change of frequency, step 3
0 - 300
s
0.01
2
7.4
CURRENT ELEMENTS
7.4.1
DIRECTIONAL ELEMENTS
Description Range
Units
Step
Default
67P Phase characteristic angle
Characteristic angle for phase directional elements
0 - 90
deg
1
45
67G Ground characteristic angle
Characteristic angle for ground directional elements
0 - 90
deg
1
45
67Q Negative sequence characteristic angle
Characteristic angle for negative sequence directional elements
0 - 90
deg
1
45
67P Minimum voltage
Minimum polarizing voltage threshold for phase directional
elements
0.05 - 10
V
0.01
0.2
67G Minimum voltage
Minimum polarizing voltage threshold for ground directional
elements
0.05 - 10
V
0.01
0.2
67Q Minimum voltage
Minimum polarizing voltage threshold for negative sequence
directional elements
0.05 - 10
V
0.01
0.2
Zero sequence voltage compensation
Sets a factor to amplify available zero sequence voltage
polarization level
0 - 50
-
0.01
0
Negative Sequence Voltage Compensation
Sets a factor to amplify available zero sequence voltage
polarization level
0 - 50
-
0.01
0
Loss of polarization block
Select whether to block overcurrent element when polarization
voltage is below set thresholds (Yes) or to allow the elements
to operate non-directional (No).
No - Yes
-
1
No
67 transient block coordination time
This is a timer setting for transient block logic when the
directional overcurrent elements (50P and/or 50Q/G) are used
in a permissive pilot scheme.
0 – 30
ms
1
0
July 21, 2009
7-15
973.334.3100
