5 Management Function Table of Contents
7.3 Protection Settings
7.3.3 Negative Sequence Overcurrent Protection Settings
The negative sequence overcurrent protection settings (in the submenu “NegOC Settings”) are used to determine the characteristic of the negative sequence overcurrent protection.
No. Menu text Explanation Range Step
1 50/51Q1.I2_Set The current setting of the stage 1 negative
sequence overcurrent protection 0.05In~4In 0.001A 2 50/51Q1.t_Op The time setting of the stage 1 negative sequence
overcurrent protection 0~100s 0.001s
3 50/51Q1.En The logic setting of the stage 1 negative sequence
overcurrent protection 0~1 1
4 50/51Q1.OutMap The output matrix setting of the stage 1 negative sequence overcurrent protection
0x00000000 ~ 0x7FFFFFFF 1 5 50/51Q2.I2_Set The current setting of the stage 2 negative
sequence overcurrent protection 0.05In~4In 0.001A 6 50/51Q2.t_Op The time setting of the stage 2 negative sequence
overcurrent protection 0~100s 0.001s
7 50/51Q2.En The logic setting of the stage 2 negative sequence
overcurrent protection 0~1 1
8 50/51Q2.OutMap The output matrix setting of the stage 2 negative sequence overcurrent protection
0x00000000 ~ 0x7FFFFFFF 1 9 50/51Q2.Opt_Curve The setting is for selecting the inverse time
characteristic curve for the NOC2 protection 0~13 1 10 50/51Q2.TMS The time multiplier setting of the negative
sequence IDMT overcurrent protection 0.05~100.0 0.001 11 50/51Q2.tmin The minimum operation time setting of the
negative sequence IDMT overcurrent protection 0~100s 0.001s 12 50/51Q2.K Constant “k” for the negative sequence IDMT
overcurrent protection, see Section 3.7.2 0.001~120.0 0.0001 13 50/51Q2.C Constant “C” for the negative sequence IDMT
overcurrent protection, see Section 3.7.2 0.00~1.00 0.0001 14 50/51Q2.Alpha Constant “α” for the negative sequence IDMT
overcurrent protection, see Section 3.7.2 0.01~3.00 0.0001
7.3.4 Sensitive Earth Fault Protection Settings
The sensitive earth fault protection settings (in the submenu “SEF Settings”) are used to determine the characteristic of the sensitive earth fault protection.
All the settings of the sensitive earth fault protection are listed in the following table.
No. Menu text Explanation Range Step
1 50/51SEF.RCA The relay characteristic angle for the directional
sensitive earth fault protection -180°~179° 1° 2 50/51SEF.En_VTS_Blk
The logic setting of the function which blocks the SEF protection related voltage measurement when the voltage transformer is failed
0~1 1
3 50/51SEF1.3I0_Set The current setting of the stage 1 sensitive earth
4 50/51SEF1.t_Op The time setting of the stage 1 sensitive earth
fault protection 0~100s 0.001s
5 50/51SEF1.Opt_Dir The setting is used to select the directional mode
for the stage 1 SEF protection, see Section 3.6.3 0~2 1 6 50/51SEF1.En The logic setting of the stage 1 sensitive earth
fault protection 0~1 1
7 50/51SEF1.OutMap The output matrix setting of the stage 1 sensitive earth fault protection
0x00000000 ~ 0x7FFFFFFF 1 8 50/51SEF2.3I0_Set The current setting of the stage 2 sensitive earth
fault protection 0.005~0.4A 0.001A
9 50/51SEF2.t_Op The time setting of the stage 2 sensitive earth
fault protection 0~100s 0.001s
10 50/51SEF2.Opt_Dir The setting is used to select the directional mode
for the stage 2 SEF protection, see Section 3.6.3 0~2 1 11 50/51SEF2.En The logic setting of the stage 2 sensitive earth
fault protection 0~1 1
12 50/51SEF2.OutMap The output matrix setting of the stage 2 sensitive earth fault protection
0x00000000 ~ 0x7FFFFFFF 1 13 50/51SEF3.3I0_Set The current setting of the stage 3 sensitive earth
fault protection 0.005~0.4A 0.001A
14 50/51SEF3.t_Op The time setting of the stage 3 sensitive earth
fault protection 0~100s 0.001s
15 50/51SEF3.Opt_Dir The setting is used to select the directional mode
for the stage 3 SEF protection, see Section 3.6.3 0~2 1 16 50/51SEF3.En The logic setting of the stage 3 sensitive earth
fault protection 0~1 1
17 50/51SEF3.OutMap The output matrix setting of the stage 3 sensitive earth fault protection
0x00000000 ~ 0x7FFFFFFF 1 18 50/51SEF4.3I0_Set The current setting of the stage 4 sensitive earth
fault protection 0.005~0.4A 0.001A
19 50/51SEF4.t_Op The time setting of the stage 4 sensitive earth
fault protection 0~100s 0.001s
20 50/51SEF4.Opt_Dir The setting is used to select the directional mode
for the stage 4 SEF protection, see Section 3.6.3 0~2 1 21 50/51SEF4.En The logic setting of the stage 4 sensitive earth
fault protection 0~1 1
22 50/51SEF4.OutMap The output matrix setting of the stage 4 sensitive earth fault protection
0x00000000 ~ 0x7FFFFFFF 1 23 50/51SEF4.Opt_Curve The setting is for selecting the inverse time
characteristic curve for SEF4 protection 0~13 1
24 50/51SEF4.TMS The time multiplier setting of the IDMT sensitive
earth fault protection 0.05~100.0 0.001
25 50/51SEF4.tmin The minimum operation time setting of the IDMT
26 50/51SEF4.K Constant “k” for the IDMT sensitive earth fault
protection, see Section 3.6.2 0.001~120.0 0.0001 27 50/51SEF4.C Constant “C” for the IDMT sensitive earth fault
protection, see Section 3.6.2 0.00~1.00 0.0001
28 50/51SEF4.Alpha Constant “α” for the IDMT sensitive earth fault
protection, see Section 3.6.2 0.01~3.00 0.0001
NOTE!
1. The setting [50/51SEFx.Opt_Dir] (x: 1~4) is used to select the directional mode for the stage x (x: 1~4) sensitive earth fault protection respectively. “0” is the non-directional mode; “1” is the forward directional mode; and “2” is the reverse directional mode.
7.3.5 Breaker Failure Protection Settings
The breaker failure protection settings (in the submenu “BFP Settings”) are used to determine the characteristic of the breaker failure protection.
All the settings of the breaker failure protection are listed in the following table.
No. Menu text Explanation Range Step
1 50BF.I_Set The current setting of the breaker failure
protection 0.05In~5.0In 0.001A
2 50BF.t_Op The time setting of the breaker failure protection 0~100s 0.001s 3 50BF.t_ReTrp The re-trip time setting of the breaker failure
protection 0~100s 0.001s
4 50BF.Opt_LogicMode The setting for selecting the criteria logic of the
breaker failure protection 1~4 1
5 50BF.En The logic setting of the breaker failure protection 0~1 1 6 50BF.En_ReTrp The logic setting of the re-trip function of the
breaker failure protection 0~1 1
7 50BF.OutMap The output matrix setting of the breaker failure protection
0x00000000 ~ 0x7FFFFFFF 1 8 50BF.OutMap_ReTrp The output matrix setting of the re-trip function of
the breaker failure protection
0x00000000 ~ 0x7FFFFFFF 1 NOTE!
1. The setting [50BF.Opt_LogicMode] is used to select the criteria logic of the breaker failure protection. Four criteria logics based on the phase currents and the circuit breaker state (based on the binary input [BI_52b]) are supported in this relay.
The two criteria conditions are list as below:
(A) The maximum phase current is greater than the setting [50BF.I_Set]. (B) The circuit breaker is still closed ([BI_52b] = 0).
Setting Value Criteria Condition Logic
1 Ipmax > [50BF.I_Set] Only A
2 NOT([BI_52b]) Only B
3 (Ipmax > [50BF.I_Set]) OR (NOT([BI_52b])) A OR B 4 (Ipmax > [50BF.I_Set]) AND (NOT([BI_52b])) A AND B
7.3.6 Broken Conductor Protection Settings
The broken conductor protection settings (in the submenu “BrknCond Settings”) are used to determine the characteristic of the broken conductor protection.
All the settings of the broken conductor protection are listed in the following table.
No. Menu text Explanation Range Step
1 50BC.I2/I1_Set The ratio setting for the broken conductor
protection 0.10~1.00 0.001
2 50BC.t_Op The time setting for the broken conductor
protection 0~200s 0.001s
3 50BC.En The logic setting for the broken conductor
protection 0~1 1
4 50BC.OutMap The output matrix setting of the broken conductor protection
0x00000000 ~ 0x7FFFFFFF 1
7.3.7 Cold Load Pickup Settings
The cold load pickup logic settings (in the submenu “CLP Settings”) are used to determine the characteristic of the cold load pickup logic.
All the settings of the cold load pickup logic are listed in the following table
No. Menu text Explanation Range Step
1 CLP.Opt_LogicMode The setting for selecting the cold load condition 1~2 1 2 CLP.t_Cold The time setting for ensuring the cold load
condition is met 0~4000s 0.001s
3 CLP.t_Rst The time setting for resetting the cold load pickup
logic 0~4000s 0.001s
4 CLP.t_ShortRst The time setting for fast resetting the cold load
pickup logic 0~600s 0.001s
5 CLP.En The logic setting of the cold load pickup logic
function 0~1 1
6 50/51P1.CLP.IMult The multiple setting of the stage 1 overcurrent
protection when CLP is active 1.00~10.00 0.001
7 50/51P1.CLP.t_Op The time setting of the stage 1 overcurrent
protection when CLP is active 0~100s 0.001s
8 50/51P2.CLP.IMult The multiple setting of the stage 2 overcurrent
9 50/51P2.CLP.t_Op The time setting of the stage 2 overcurrent
protection when CLP is active 0~100s 0.001s
10 50/51P3.CLP.IMult The multiple setting of the stage 3 overcurrent
protection when CLP is active 1.00~10.00 0.001
11 50/51P3.CLP.t_Op The time setting of the stage 3 overcurrent
protection when CLP is active 0~100s 0.001s
12 50/51P4.CLP.IMult The multiple setting of the stage 4 overcurrent
protection when CLP is active 1.00~10.00 0.001
13 50/51P4.CLP.t_Op The time setting of the stage 4 overcurrent
protection when CLP is active 0~100s 0.001s
14 50/51P4.CLP.TMS The time multiplier setting of the IDMT overcurrent
protection when CLP is active 0.05~100.0 0.001
15 50/51G1.CLP.IMult The multiple setting of the stage 1 zero sequence
overcurrent protection when CLP is active 1.00~10.00 0.001 16 50/51G1.CLP.t_Op The time setting of the stage 1 zero sequence
overcurrent protection when CLP is active 0~100s 0.001s 17 50/51G2.CLP.IMult The multiple setting of the stage 2 zero sequence
overcurrent protection when CLP is active 1.00~10.00 0.001 18 50/51G2.CLP.t_Op The time setting of the stage 2 zero sequence
overcurrent protection when CLP is active 0~100s 0.001s 19 50/51G3.CLP.IMult The multiple setting of the stage 3 zero sequence
overcurrent protection when CLP is active 1.00~10.00 0.001 20 50/51G3.CLP.t_Op The time setting of the stage 3 zero sequence
overcurrent protection when CLP is active 0~100s 0.001s 21 50/51G4.CLP.IMult The multiple setting of the stage 4 zero sequence
overcurrent protection when CLP is active 1.00~10.00 0.001 22 50/51G4.CLP.t_Op The time setting of the stage 4 zero sequence
overcurrent protection when CLP is active 0~100s 0.001s 23 50/51G1.CLP.TMS The time multiplier setting of the zero sequence
IDMT overcurrent protection when CLP is active 0.05~100.0 0.001
7.3.8 SOTF Protection Settings
The SOTF protection settings (in the submenu “SOTF Settings”) are used to determine the characteristic of the SOTF protection.
All the settings of the SOTF protection are listed in the following table.
No. Menu text Explanation Range Step
1 SOTF.t_En The enabling time setting of the SOTF protection 0~100s 0.001s 2 SOTF.Opt_Mode The setting for selecting the acceleration tripping
mode of the SOTF protection 0~1 1
3 50PSOTF.I_Set The current setting of the SOTF overcurrent
4 50PSOTF.t_Op The time setting of the SOTF overcurrent
protection 0~100s 0.001s
5 50PSOTF.En The logic setting of the SOTF overcurrent
protection 0~1 1
6 50PSOTF.OutMap The output matrix setting of the SOTF overcurrent protection
0x00000000 ~ 0x7FFFFFFF 1 7 50GSOTF.3I0_Set The current setting of the zero sequence SOTF
overcurrent protection 0.05In~30In 0.001A
8 50GSOTF.t_Op The time setting of the zero sequence SOTF
overcurrent protection 0~100s 0.001s
9 50GSOTF.En The logic setting of the zero sequence SOTF
overcurrent protection 0~1 1
10 50GSOTF.OutMap The output matrix setting of the zero sequence SOTF overcurrent protection
0x00000000 ~ 0x7FFFFFFF 1 NOTE!
1. The setting [SOTF.t_En] is used to enable the SOTF protection for the appointed time delay, when the enabling conditions are satisfied (See Section 3.10).
2. The setting [SOTF.Opt_Mode] is used for selecting the acceleration tripping mode of the SOTF protection. Setting as “1” means accelerated tripping before auto-reclosing; and setting as “0” means accelerated tripping after auto-reclosing.