List of Figures
3.2 Fault Detectors
3.5.5 Zero Sequence Overcurrent Protection Settings
For the information about the common explanation of the settings, see Section 7.3.
All the settings of the No.1 zero sequence overcurrent protection are listed in the following table.
No. Menu text Explanation Range Step
1 50/51G.RCA The relay characteristic angle for the No.1
directional zero sequence overcurrent protection -180°~179° 1°
2 50/51G.En_VTS_Blk
The logic setting of the function which blocks the 1ROC protection related voltage measurement when the voltage transformer is failed
0~1 1
3 50/51G.K_Hm2 The percent setting of the harmonic blocking
element for the No.1 ROC protection 0.05~1.00 0.001
4 50/51G.3I0_Rls_HmBlk The current setting for releasing the harmonic
blocking element of the No.1 ROC protection 0.05In~30In 0.001A
5 50/51G1.3I0_Set The current setting of the No.1 stage 1 zero
sequence overcurrent protection 0.05In~30In 0.001A
6 50/51G1.t_Op The time setting of the No.1 stage 1 zero
sequence overcurrent protection 0~100s 0.001s
7 50/51G1.Opt_Dir The setting is used to select the directional mode
for the No.1 ROC1 protection, see Section 3.5.3 0~2 1
8 50/51G1.En_Hm_Blk The logic setting of the harmonic blocking element
for the No.1 ROC1 protection 0~1 1
9 50/51G1.En The logic setting of the No.1 stage 1 zero
sequence overcurrent protection 0~1 1
10 50/51G1.OutMap The output matrix setting of the No.1 stage 1 zero sequence overcurrent protection
0x00000000 ~ 0x7FFFFFFF 1
11 50/51G2.3I0_Set The current setting of the No.1 stage 2 zero
sequence overcurrent protection 0.05In~30In 0.001A
12 50/51G2.t_Op The time setting of the No.1 stage 2 zero
sequence overcurrent protection 0~100s 0.001s
13 50/51G2.Opt_Dir The setting is used to select the directional mode
for the No.1 ROC2 protection, see Section 3.5.3 0~2 1
14 50/51G2.En_Hm_Blk The logic setting of the harmonic blocking element
for the No.1 ROC2 protection 0~1 1
15 50/51G2.En The logic setting of the No.1 stage 2 zero
sequence overcurrent protection 0~1 1
16 50/51G2.OutMap The output matrix setting of the No.1 stage 2 zero sequence overcurrent protection
0x00000000 ~ 0x7FFFFFFF 1
17 50/51G3.3I0_Set The current setting of the No.1 stage 3 zero
sequence overcurrent protection 0.05In~30In 0.001A
18 50/51G3.t_Op The time setting of the No.1 stage 3 zero
sequence overcurrent protection 0~100s 0.001s
19 50/51G3.Opt_Dir The setting is used to select the directional mode
for the No.1 ROC3 protection, see Section 3.5.3 0~2 1
20 50/51G3.En_Hm_Blk The logic setting of the harmonic blocking element
for the No.1 ROC3 protection 0~1 1
21 50/51G3.En The logic setting of the No.1 stage 3 zero
sequence overcurrent protection 0~1 1
22 50/51G3.OutMap The output matrix setting of the No.1 stage 3 zero sequence overcurrent protection
0x00000000 ~ 0x7FFFFFFF 1
23 50/51G4.3I0_Set The current setting of the No.1 stage 4 zero
sequence overcurrent protection 0.05In~30In 0.001A
24 50/51G4.t_Op The time setting of the No.1 stage 4 zero
sequence overcurrent protection 0~100s 0.001s
25 50/51G4.Opt_Dir The setting is used to select the directional mode
for the No.1 ROC4 protection, see Section 3.5.3 0~2 1
26 50/51G4.En_Hm_Blk The logic setting of the harmonic blocking element
for the No.1 ROC4 protection 0~1 1
27 50/51G4.En The logic setting of the No.1 stage 4 zero
sequence overcurrent protection 0~1 1
28 50/51G4.OutMap The output matrix setting of the No.1 stage 4 zero sequence overcurrent protection
0x00000000 ~ 0x7FFFFFFF 1
29 50/51G4.Opt_Curve The setting is for selecting the inverse time
characteristic curve for the No.1 ROC4 protection 0~13 1
30 50/51G4.TMS The time multiplier setting of the No.1 zero
sequence IDMT overcurrent protection 0.05~100.0 0.001
31 50/51G4.tmin The minimum operation time setting of the No.1
zero sequence IDMT overcurrent protection 0~100s 0.001s
32 50/51G4.K Constant “k” for the No.1 zero sequence IDMT
overcurrent protection, see Section 3.5.2 0.001~120.0 0.0001
33 50/51G4.C Constant “C” for the No.1 zero sequence IDMT
overcurrent protection, see Section 3.5.2 0.00~1.00 0.0001
34 50/51G4.Alpha Constant “α” for the No.1 zero sequence IDMT
overcurrent protection, see Section 3.5.2 0.01~3.00 0.0001
All the settings of the No.2 zero sequence overcurrent protection are listed in the following table.
No. Menu text Explanation Range Step 1 A.50/51G.RCA The relay characteristic angle for the No.2
directional zero sequence overcurrent protection -180°~179° 1°
2 A.50/51G.En_VTS_Blk
The logic setting of the function which blocks the 2ROC protection related voltage measurement when the voltage transformer is failed
0~1 1
3 A.50/51G.K_Hm2 The percent setting of the harmonic blocking
element for the No.2 ROC protection 0.05~1.00 0.001
4 A.50/51G.3I0_Rls_HmBlk The current setting for releasing the harmonic
blocking element of the No.2 ROC protection 0.05In~30In 0.001A
5 A.50/51G1.3I0_Set The current setting of the No.2 stage 1 zero
sequence overcurrent protection 0.05In~30In 0.001A
6 A.50/51G1.t_Op The time setting of the No.2 stage 1 zero
sequence overcurrent protection 0~100s 0.001s
7 A.50/51G1.Opt_Dir The setting is used to select the directional mode
for the No.2 ROC1 protection 0~2 1
8 A.50/51G1.En_Hm_Blk The logic setting of the harmonic blocking element
for the No.2 ROC1 protection 0~1 1
9 A.50/51G1.En The logic setting of the No.2 stage 1 zero
sequence overcurrent protection 0~1 1
10 A.50/51G1.OutMap The output matrix setting of the No.2 stage 1 zero sequence overcurrent protection
0x00000000 ~ 0x7FFFFFFF 1
11 A.50/51G2.3I0_Set The current setting of the No.2 stage 2 zero
sequence overcurrent protection 0.05In~30In 0.001A
12 A.50/51G2.t_Op The time setting of the No.2 stage 2 zero
sequence overcurrent protection 0~100s 0.001s
13 A.50/51G2.Opt_Dir The setting is used to select the directional mode
for the No.2 ROC2 protection 0~2 1
14 A.50/51G2.En_Hm_Blk The logic setting of the harmonic blocking element
for the No.2 ROC2 protection 0~1 1
15 A.50/51G2.En The logic setting of the No.2 stage 2 zero
sequence overcurrent protection 0~1 1
16 A.50/51G2.OutMap The output matrix setting of the No.2 stage 2 zero sequence overcurrent protection
0x00000000 ~ 0x7FFFFFFF 1
17 A.50/51G3.3I0_Set The current setting of the No.2 stage 3 zero
sequence overcurrent protection 0.05In~30In 0.001A
18 A.50/51G3.t_Op The time setting of the No.2 stage 3 zero
sequence overcurrent protection 0~100s 0.001s
19 A.50/51G3.Opt_Dir The setting is used to select the directional mode
for the No.2 ROC3 protection 0~2 1
20 A.50/51G3.En_Hm_Blk The logic setting of the harmonic blocking element
for the No.2 ROC3 protection 0~1 1
21 A.50/51G3.En The logic setting of the No.2 stage 3 zero
sequence overcurrent protection 0~1 1
22 A.50/51G3.OutMap The output matrix setting of the No.2 stage 3 zero sequence overcurrent protection
0x00000000 ~ 0x7FFFFFFF 1
23 A.50/51G4.3I0_Set The current setting of the No.2 stage 4 zero
sequence overcurrent protection 0.05In~30In 0.001A
24 A.50/51G4.t_Op The time setting of the No.2 stage 4 zero
sequence overcurrent protection 0~100s 0.001s
25 A.50/51G4.Opt_Dir The setting is used to select the directional mode
for the No.2 ROC4 protection 0~2 1
26 A.50/51G4.En_Hm_Blk The logic setting of the harmonic blocking element
for the No.2 ROC4 protection 0~1 1
27 A.50/51G4.En The logic setting of the No.2 stage 4 zero
sequence overcurrent protection 0~1 1
28 A.50/51G4.OutMap The output matrix setting of the No.2 stage 4 zero sequence overcurrent protection
0x00000000 ~ 0x7FFFFFFF 1
29 A.50/51G4.Opt_Curve The setting is for selecting the inverse time
characteristic curve for the No.2 ROC4 protection 0~13 1
30 A.50/51G4.TMS The time multiplier setting of the No.2 zero
sequence IDMT overcurrent protection 0.05~100.0 0.001
31 A.50/51G4.tmin The minimum operation time setting of the No.2
zero sequence IDMT overcurrent protection 0~100s 0.001s
32 A.50/51G4.K Constant “k” for the No.2 zero sequence IDMT
overcurrent protection, see Section 3.5.2 0.001~120.0 0.0001
33 A.50/51G4.C Constant “C” for the No.2 zero sequence IDMT
overcurrent protection, see Section 3.5.2 0.00~1.00 0.0001
34 A.50/51G4.Alpha Constant “α” for the No.2 zero sequence IDMT
overcurrent protection, see Section 3.5.2 0.01~3.00 0.0001