GE P50 Agile P253 Technical Manual page 192

7 Protection Parameter Settings
Sr. No
5.
This time multiplier setting is used to adjust the operating time of the IEEE/US IDMT curves.
6.
This setting determines the type of reset/release characteristics. IDMT applicable for IEEE curves only.
7.
This setting determines the reset/release time for IEEE IDMT characteristic
8.
This setting determines the reset/release time for Definite Time (DT) and all IDMT curve
9.
This setting determines the enabling/disabling of blocking second stage overcurrent element due to presence of inrush current.
If I>2 Blocking and 2nd Harmonic both settings are enabled, then (I>2) trip command will be blocked in case 2nd harmonics content in
any phase is above the 2ndHarm Thresh. and fundamental current is below I> lift 2H setting. (Set in SYSTEM CONFIG Menu.)
2.12.2.3 I>3 Function
Sr. No
1.
This setting determines the tripping characteristic for the third stage overcurrent element.
2.
This setting determines the pick-up setting for second third overcurrent element.
3.
This setting determines the time-delay for the definite time setting if selected for third stage overcurrent element.
4.
This time multiplier setting is used to adjust the operating time of the IEC/UK IDMT characteristic.
5.
This time multiplier setting is used to adjust the operating time of the IEEE/US IDMT curves.
6.
This setting determines the type of reset/release characteristics. IDMT applicable for IEEE curves only.
7.
This setting determines the reset/release time for IEEE IDMT characteristic
8.
This setting determines the reset/release time for Definite Time (DT) and all IDMT curve
9.
This setting determines the enabling/disabling of blocking third stage overcurrent element due to presence of inrush current.
If I>3 Blocking and 2nd Harmonic both settings are enabled, then (I>3) trip command will be blocked in case 2nd harmonics content in
any phase is above the 2ndHarm Thresh. and fundamental current is below I> lift 2H setting. (Set in SYSTEM CONFIG Menu.)
7-12
Parameter
I>2 Time Dial 1
I>2 Reset Char DT
I>2 RTMS 1
I>2 tRESET 0.01 S
I>2 2H Blocking Disabled
Parameter
I>3 Function IEC S Inverse
I>3 Current Set 1*In
I>3 Time Delay 1 S
I>3 TMS 1
I>3 Time Dial 1
I>3 Reset Char DT
I>3 RTMS 1
I>3 tRESET 0.01 S
I>3 2H Blocking Disabled
Default setting
Default setting
P50 Agile P253
Setting Range
0.01 to 100 step 0.01
DT/IDMT
0.025 to 1.2 step 0.005
0 to 100s step 0.01s
Enabled/Disabled
Setting Range
Disabled/DT/IEC S Inverse/S Inverse
1.3Sec/IEC V Inverse/IEC E Inverse/UK LT
Inverse/IEEE M Inverse/IEEE V Inverse /IEEE
E Inverse/US Inverse/ US ST Inverse
If DT 1 to 35*In step 0.01*In
If IDMT then 0.05 to 4*In step 0.01*In
0 to 100s step 0.01s
0.025 to 1.2 step 0.005
0.01 to 100 step 0.01
DT/IDMT
0.025 to 1.2 step 0.005
0 to 100s step 0.01s
Enabled/Disabled
P253/EN M/C