Digital Overcurrent & Ground Overvoltage & Selective Ground Relay (GDR-AEF01) User's Manual
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Kyongbo Electronics Co., Ltd.
Time Characteristic
Characteristic Value
Indication
Mark
Note
K
L
C
Inverse Time
0.14
0.02
0
NI
-
Kyongbo Induction
Type Inverse Time
0.11
0.02
0.42
KNI
KEPCO
Type
Very Inverse Time
13.5
1
0
VI
-
Kyongbo Induction
Type Very Inverse
Time
39.85
1.95
1.084
KVI
KEPCO
Type
Extreme Inverse
Time
80
2
0
EI
-
Long Inverse Time
54
1
0
LI
-
Definite Time
-
-
-
DT
-
【
Table 3.1
】
Relay Time Characteristics and Characteristic Values for Curve Selection
When setting the relay, selecting the time characteristic curve will decide the K,
L, C values in the above table.
Logic Diagram for overcurrent element operation is as follows.
【
Figure 3.10
】
INST. OCR(IOCR) Logic Diagram