KEB COMBIVERT F6

Protection functions
58
© 2022 KEB Automation KG
is17
temperature dependent OL2 offset
0x3511
Bit
Function
Plaintext
Description
0..2
temp off-
set
0
off
No increase over the actual OL2 curve is possible. There is
no dependence between heat sink temperature and OL2 cur-
rent.
1
moder-
ate
The factors for a possible increase of the OL2 curve are cho-
sen by way that the maximum current is moderately increased
when the heat sink does not use the maximum temperature
due to the drive cycle. The thermal load of the power module
is increased. The service life of the power module is moder-
ately reduced.
2
maxi-
mum
The factors for a possible increase of the OL2 curve are cho-
sen by way that the maximum current is increased as much
as the thermal limits of the power module make it possible.
This means that the current available for the application var-
ies greatly depending on the heat sink temperature. In addi-
tion, the service life of the device is significantly reduced due
to the increased thermal load of the power module.
3
priority
0
derating
first
The derating always occurs at the "base" OL2 limit without
temperature-dependent increase. Default setting: If a lower
switching frequency is also permissible for the application, it is
always reasonable to use this instead of loading the inverter
power module.
1
offset
first
Notice: This setting is only available for A and P cards
Offset has priority. Derating occurs only when the tempera-
ture-dependent increased OL2 current is exceeded.
The possible temperature-dependent increase depends on the used inverter.
NOTICE
With the increase of the heat sink temperature the tempera-
ture-dependent increase of the OL2 current reduces to zero.
This must be considered when testing / designing the appli-
cation.
Parameter is17 temperature dependent OL2 offset is a PowerOn Parameter: only
if value 2 is set in is17 when switching on, this value can also be used during oper-
ation.
If is17 is 1 or zero when switching on, then a setting of is17 causes the setting "2
maximum" but only the moderate increase is activated during the current PowerOn
cycle and only after PowerOn the selected setting "2 maximum" becomes effective.
The increase of the OL2 limit is adjustable in 2 steps:
► basic current (0 = off)
No increase over the actual OL2 curve is possible. There is no dependence be-
tween heat sink temperature and OL2 current.
► moderate increase ("1“ moderate)