GE Agile P50 Series, Technical Manual

Page: 187 / 268

P50 Agile P153 7 Protection Parameter Settings
P153/EN M/B 7-21
Sr. No Parameter Default setting Setting Range
1. I2>3 Function IEC S Inverse
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
This setting determines the tripping characteristic for the third stage Negative sequence overcurrent element.
2. I2>3 Current Set 1.00*In
If DT 1.0 to 35.00*In step 0.01*In
If IDMT 0.10 to 4.00*In step 0.01*In
This setting determines the pick-up setting for second third Negative sequence overcurrent element.
3.
I2>3 Time Delay 1.00 S 0s to 200s step 0.01s
This setting determines the time-delay for the definite time setting if selected for third stage Negative sequence overcurrent element.
4.
I2>3 TMS 1.000 0.025 to 1.2 step 0.005
This time multiplier setting is used to adjust the operating time of the IEC / UK IDMT characteristic.
5.
I2>3 Time Dial 1.00 0.01 to 100 step 0.01s
This time multiplier setting is used to adjust the operating time of the IEEE / US IDMT curves.
6.
tRESET Function DT DT/IDMT
This setting determines the type of reset/release characteristics. IDMT applicable for IEEE curves only.
7.
I2>3 RTMS 1.000 0.025 to 1.2 step 0.005
This setting determines the reset/release time for IEEE IDMT characteristic
8.
I2>3 tRESET 1.00 S 0s to 100s step 0.01s
This setting determines the reset/release time for Definite Time (DT) and all IDMT curve
9.
I2>3 2H Blocking Disabled Enabled / Disabled
This setting determines the enabling/disabling of blocking third stage Negative sequence overcurrent element due to presence of inrush
current.
If I2>3 Blocking and 2nd Harmonic setting are enabled, then (I2>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.)
2.12.9 BROKEN CONDUCTOR Settings
Sr. No Parameter Defaults setting Setting / Ranges
1. BC Alarm Disabled Disabled / Enabled
This setting enables (activate) or disables (turn off) the Broken Conductor alarm.
2.
I2/I1 Set-1 0.50 0.20 to 1.00 step 0.01
This setting determines the pick-up threshold of the negative to positive sequence current ratio for Broken Conductor alarm.
3.
I2/I1 Time Dly-1 10.00 S 0s to 100s step 0.01s
This setting sets the time delay for the Broken Conductor alarm.
4.
BC Trip Disabled Disabled / Enabled
This setting enables (activate) or disables (turn off) the Broken Conductor Trip function
5.
I2/I1 Set-2 0.50 0.20 to 1.00 step 0.01
This setting determines the pick-up threshold of the negative to positive sequence current ratio for Broken Conductor Trip.
6.
I2/I1 Time Dly-2 10.00 S 0s to 100s step 0.01s
This setting sets the time delay for Broken Conductor Trip.
2.12.10 CB FAIL Settings
Sr. No Parameter Defaults setting Setting / Ranges
1. CB Fail Status Enabled Disabled / Enabled
This setting enables (activate) or disables (turn off) the CB Fail Status