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4-6
Supporting Functions
857-UM001A-EN-P – July 2009
1
Pick-up
2
Idle
Cold
load
No activation because the current has not been under the set I
Current dropped under the I
current and the pick-up current for over 80ms.
No activation because the phase two lasted longer than 80ms.
Now we have a cold load activation which lasts as long as the operation time
was set or as long as the current stays above the pick-up setting.
Figure 4.1 – Functionality of Cold Load and Inrush Current Feature
Table 4.4 – Parameters of the Cold Load and Inrush Detection Function
Parameter
Value
ColdLd
-
Start
Trip
Inrush
-
Start
Trip
ILmax
Pickup
Idle
MaxTime
Idle
Pickup
80
Pickupf2
Set = An editable parameter (password needed)
3
4
current level but now it stays between the I
dle
Unit
Description
Status of cold load detection:
Cold load situation is active
Timeout
Status of inrush detection:
Inrush is detected
Timeout
A
The supervised value. Max. of IL1,
IL2 and IL3
A
Primary scaled pick-up value
A
Primary scaled upper limit for idle
current
s
xImode
Current limit setting for idle situation
xImode
Pick-up setting for minimum start
current
ms
Maximum transition time for start
recognition
%
Pick-up value for relative amount of
2
nd
harmonic, I
/I
f2
f1
current.
dle
dle
Note
Set
Set
Set
Set
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