Iskra FPC 200 - Page 29

Functionality
USER MANUAL FPC 200 - 3/2017 29
2.2.5.4 Setting parameters
Parameter
Range
Description
Enabled
No
Yes
Enabling protection function.
Operate mode
Off
On
Enabling protection function separately for each group level.
Pickup value
0,1 … 0,75 … 2,00 I
n_obj
Value at which fault conditions are considered.
Trip delay
0,00 … 1,50 … 300,00 s
Delay of trip signal
Pickup delay
10 … 20 … 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
1,01 … 1,20 … 3,00 I
p
Drop-out value below which the protection drops.
Current Supervision
Enabled
No
Yes
Enabling Current Supervision.
Zero I level
0,04 … 0,10 … 1
Level of current below which operation of protection is blocked.
Operation is blocked only in case of all three current amplitude Lx
are below Zero I level.
Recovery time
0,00 … 60 … 100 ms
Time of blocked protection after reaching Zero I level for Recovery
time.
Pickup block
None
Variable 1
Variable 2
Variable 3
Variable 4
Source of blocking signal.
Table 14: Phase undercurrent protection function parameters.
2.2.5.5 Counters
Name
Description
Pickup
Total consecutive number of pickup signals.
Trip
Consecutive number of trip signals.
Pickup L1
Consecutive number of pickup signals detected in phase L1
Pickup L2
Consecutive number of pickup signals detected in phase L2
Pickup L3
Consecutive number of pickup signals detected in phase L3
Table 15: Counters presented in phase undercurrent protection.