Technical Data P746/EN TD/G31
MiCOM P746
(TD) 2-9
TD
Overcurrent Protection
Phase Fault Protection (50/51)
3 phase Overcurrent function Status I>1:
∗ Disabled
∗ DT
∗ IEC S Inverse or IEC V Inverse or IEC E
Inverse
∗ UK LT Inverse
∗ IEEE M Inverse or IEEE V Inverse or IEEE
E Inverse
∗ US Inverse or US ST Inverse
Current Set if “function status” ≠0
∗ I>1: 0.10...32.00 xIn
Time delay if “function status”=1
∗ I>1: 0.00...100.00 xIn
TMS if 2≤ ”function status” ≤5
∗ I>1: 0.025...1.200 xIn (step 0.025)
Time dial if “function status”≥6
∗ I>1: 0.5...15.0 xIn
Reset Char. if “function status”≥6
I>1:
∗ DT
∗ Inverse
tReset if 2≤”function status”≤5 OR if “Reset
Char.”=1 AND “function status”≥6
∗ I>1: 0.0...100.0 xIn
3 phase Overcurrent threshold function status
I>2:
∗ Disabled
∗ Blocking 87BB
∗ High set I>2
∗ Both
∗ Current Set
I>2: 0.10... 32.00
Time Delay if “function status”=1
∗ I>2: 0.00...100.00 s
Earth Fault Protection (50N/51N) (One Box
Mode)
Residual Overcurrent Function Status I
N
>1:
Disabled
∗ DT
∗ IDG
∗ RI
∗ IEC S Inverse or IEC V Inverse or IEC E
Inverse
∗ UK LT Inverse, UK Rectifier
∗ IEEE M Inverse or IEEE V Inverse or IEEE
E Inverse
∗ US Inverse or US ST Inverse
Current Set if “function status” ≠0
∗ I
N
>1: 0.10...32.00 xIn
Time delay if “function status”=1
∗ I
N
>1: 0.00...100.00 xIn
TMS if 2≤”function status”≤5
∗ I
N
>1: 0.025...1.200 xIn (step 0.025)
Time dial if “function status”≥6
∗ I
N
>1: 0.5...15.0 xIn
Reset Char. if “function status”≥6
I
N
>1:
∗ DT
∗ Inverse
tReset if 2≤”function status”≤5 OR if “Reset
Char.”=1 AND “function status”≥6
∗ I
N
>1: 0.0...100.0
Residual Overcurrent threshold function status
I
N
>2:
∗ Disabled
∗ Blocking 87BB
∗ High set I>2
∗ Both
Current Set
∗ I
N
>2: 0.10 xIn...32.00 xIn
Time Delay if “function status”=1
∗ I
N
>2: 0.00...100.00 s
Supervision
Voltage transformer supervision:
Status:
∗ Blocking & indication
∗ Manual & automatic mode
Time delay:
∗ 1s...10.00s (step 100ms)
Current transformer supervision:
Status:
∗ Blocking & indication
Setting accuracy: ±5%
Time delay:
∗ 0…10.00s (step 100ms)
accuracy: ±2% or 50ms (whichever is
greater)
CTS I1 / CTS I2/I1>1 / CTS I2/I1 >2:
∗ 5%...100% (step 1%)
Date and Time
IRIG-B Sync:
∗ Disabled/Enabled
Battery Alarm:
∗ Disabled/Enabled
Configuration
Setting Group:
. Select via Menu
. Select via Opto
Active Settings: Group 1/2/3/4
Setting Group 1: Disabled/Enabled
Setting Group 2: Disabled/Enabled
Setting Group 3: Disabled/Enabled
Setting Group 4: Disabled/Enabled
Dead zone OC Prot: Disabled/Enabled
Diff Busbar Prot: Disabled/Enabled
Overcurrent Prot: Disabled/Enabled
Earth Fault Prot: Disabled/Enabled
CB Fail & I>: Disabled/Enabled
Setting Values: Primary/Secondary
LCD Contrast: (Factory pre-set)
Fault Recorder
Records for the last 5 faults:
∗ Indication of the faulty zone
∗ Protection element operated
∗ Active setting group
∗ Fault duration
∗ Currents and frequency
∗ Faulty zone differential and bias current
∗ Topology at the fault occurrence
Event Recorder
Records for the last 512 events
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