ADR233B
Ref ID : ADR233B/IM/SS
Rev No. : 05
Page No. : 177 of 479
6.8.6 Residual OC (W1 & W2)
Sr. No Parameter Defaults setting Settings / Ranges
1.
3I0>1 Enable Disabled Disable/Enabled
This setting is to disable or enable the Residual over current protection function.
2.
3I0>1 Curve IEC S Inverse Definite Time / IEC S Inverse / ST
Inverse 1.3S / 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 is to set the tripping characteristic for the first stage of residual over current element.
3.
3I0>1 1.00 A*In If DT 0.05 to 35.00*In in step of 0.01*In
If IDMT 0.05 to 4.00*In in step of
0.01*In
This setting is to set the Pick-up setting for first stage of residual over current element.
4.
t3I0>1 DT Delay 1.00 S 0 to 1899.9 s in step of 0.01s
This setting is used to set the time-delay for the Definite Time (DT) setting
5.
3I0>1 TMS 1.000 0.01 to 1.5 in step of 0.01
This setting is to set the Time Multiplier Setting to adjust the operating time of the IEC / UK IDMT
characteristic.
6.
3I0>1 Time Dial 1.00 0.01 to 100.00 in step of 0.01
This setting is to set the Time Dial setting to adjust the operating time of the IEEE / US IDMT
characteristic.
7.
3I0>1 D/O Char DT IDMT/DT
This setting is to set the reset/release characteristic.
8.
t3I0>1 tD/O Delay 1.00 S 0s to 100s in step of 0.01s
This setting is to set the reset/release time for Definite Time (DT) and all IDMT curve
9.
3I0>1 D/O TMS 1.000 0.025 to 1.2 in step of 0.005
This setting is to set the reset/release Time Multiplier Setting for IEEE IDMT characteristic
10.
3I0>1 2H BLK Disabled Enabled / Disabled
This setting determines the enable (activate) or disable (turn off) the first stage residual over current
element to block the trip command in presence of inrush current.
If 3I0>1 Blocking and 2nd Harmonic both setting are enable.
This function block the (3I0>1) trip command in case 2nd harmonics/fundamental in any phase is above
the 2H Thresh and fundamental current is below I> UB2H setting (set in Inrush Blocking Menu.)
11.
3I0>1 2H Thresh 20% 5% to 70% in step of 1%
This setting is to specify the 2nd Harm Threshold value, if the level of 2nd harmonic/fundamental in any
neutral current exceeds the setting, the protection function which is enabled with this function will be
blocked.
12.
I>UB2H 4 A *In 4 to 32*In in step of 0.01*In
The 2nd harmonic blocking is applied only when the fundamental current is above 2nd Harm Thresh
and below I> UB2H setting. The reset levels are 95% of these thresholds
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