Iskra FPC 200 - Page 43

Functionality
USER MANUAL FPC 200 - 3/2017 43
2.4.1.5 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
f
n
+ 0,01 … 0,50 … 10,00 Hz
Value at which fault conditions are considered.
Trip delay
0,00 … 60,00 … 300,00 s
Delay of trip signal
Pickup delay
0,00 … 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.
Minimal voltage
0,00 … 0,65 … 1,00 U
n
Any of phase to phase voltage amplitudes, below which the
protection block is considered.
Drop-out value
0,01 … 1,00 Hz
Drop-out value below which the protection drops.
Pickup block
None
Variable 1
Variable 2
Variable 3
Variable 4
Source of blocking signal.
Enable df/dt block
No
Yes
Enabling derivative of frequency with respect to time protection
block.
df/dt level
0,2 … 10,0 Hz/s
Value at which conditions for block are considered.
Block drop off delay
0 … 20 … 2000 ms
Time delay after block conditions have expired.
Table 30: Overfrequency protection function parameters.
2.4.1.6 Counters
Name
Description
Pickup
Total consecutive number of pickup signals.
Trip
Consecutive number of trip signals.
Table 31: Counters presented in overfrequency protection.