Iskra FPC 200 - Page 52

Functionality
52 USER MANUAL FPC 200 - 3/2017
presented in time to drop out and shortest time is
presented in time to trip.











2
0
ln
I
I
t 
Equation 17: Time to Trip.
Θ
2
– final temperature.
t – time in seconds.
2.5.2.2 Setting parameters
Parameter
Range
Description
Enabled
No
Yes
Enabling protection function.
Operate mode
Off
On
Enabling protection function separately for each group level.
Alarm temperature value
10,0 … 80,0 … 200,0 %
Alarm limit, 
alm
Trip temperature value
100,0 … 200,0 %
Critical temperature limit..
Running time constant
0,1 … 15,0 … 1000,0 min
Heating time constant τ.
Stopped time constant
0,1 … 30,0 … 1000,0 min
Cooling time constant τ.
Start-up time
0,1 … 10,0 … 1000,0 s
Full load start up time of the machine.
Start-up current
0,50 … 6,00 … 20,00 I
n_obj
Full load start up current of the machine.
Service factor
0,70 … 1,00 … 4,00 I
n_obj
Maximal permanent thermal current allowed relative to the nominal
current.
Hot to cold time ratio
0,00 … 0,80 … 1,00
Allowed ratio between hot and cold start-up time.
Hot state level
0,00 … 50 … 100 %
Temperature above which is considered that machine is in hot state.
Current unbalance factor
0,00 … 4,50 … 9,00
Influence of negative sequence component to heating of machine.
Insulation max
temperature
70 … 130 … 250 °C
Machine insulation class interpreted in maximal insulation temperature
Pickup block
None
Variable 1
Variable 2
Variable 3
Variable 4
Source of blocking signal.
Ambient source
None
Probe 8
Usage of external ambient source
Ambient constant
20 … 40 … 70
Constant of room temperature impact if Ambient source is set None
Maximal temperature
20 … 40 … 70
Maximal temperature for machine to work.
Table 38: Thermal overload function parameters.
2.5.2.3 Counters
Name
Description
Temperature L1
Calculated machine temperature in phase L1, 100% = 1.000 pieces.
Temperature L2
Calculated machine temperature in phase L2, 100% = 1.000 pieces.
Temperature L3
Calculated machine temperature in phase L3, 100% = 1.000 pieces.
Temperature
Calculated machine temperature  , biggest phase, 100% = 1.000
pieces.
Overload
Total consecutive number of Overload signals.
Pickup
Total consecutive number of pickup signals.
Trip
Consecutive number of trip signals.
Table 39: Counters presented in thermal overload function.