Iskra FPC 200 - Page 23

Functionality
USER MANUAL FPC 200 - 3/2017 23
2.2.2.5 Setting parameters
Parameter
Range
Description
Enabled
No
Yes
Enabling protection function.
Operate mode
Instantaneous
Definite time
IEC Normal inverse
IEC Very inverse
IEC Extremely inverse
IEC Long-time inverse
IEEE Moderately inverse
IEEE Very inverse
IEEE Extremely inverse
RI
Protection operation mode:
Definite time – constant time of operation
Inverse characteristics – selected IDMT characteristic
Pickup value
0,005 … 0,10 … 1,25 I
n_e
Limit of monitored current.
Trip delay
0,00 … 2,00 … 300,00 s
Delay of trip signal
IDMT coefficient
0,05 … 1,00
Coefficient of selected IDMT characteristic
Inrush restraint source
None
Inrush-1
Inrush-2
Input source of Inrush restraint [Chapter 2.2.5] blocking
function.
Pickup delay
0 … 5,00 … 1000 ms
Time stabilization of fault detection. As a filter of short
disturbances on measuring circuits. Time before protection
starts.
Drop-out delay
0,00 … 0,20 … 60,00 s
Time stabilization of pickup signal. Time when the monitored
value is outside the operating range, but the protection does
not stop yet.
Drop-out ratio
0,80 … 0,95 … 1,00 I
p
Drop-out value below which the protection drops.
Input current
3I
0
I
e
Selector for protection to account for calculated residual
current (3I
0
) for 50N/51N function or measured residual
current (Ie) for 50G/51G function.
Cold load pickup Enabled
No
Yes
Enabling CLP function.
Cold load pickup Level
1,01 … 1,50 … 10,00 I
p
Pickup and drop-out value increase.
Cold load pickup Duration
0 … 60 … 3600 s
Pickup value increase duration time.
Pickup block
None
Variable 1
Variable 2
Variable 3
Variable 4
Source of blocking signal.
Table 8: Earth fault overcurrent protection function parameters.
2.2.2.6 Counters
Name
Description
Pickup
Total consecutive number of pickup signals.
Trip
Consecutive number of trip signals.
CLP
Consecutive number of cold load pickup
Table 9: Counters presented in earth fault overcurrent protection.