3.11.8 14-6* Auto Derate
This group contains parameters for derating the frequency converter in case of high temperature.
14-60 Function at Over Temperature
Option:
Function:
If either heatsink or control card temperature exceeds a factory-programmed temperature limit, a
warning will be activated. If the temperature increases further, select whether the frequency con-
verter should trip (trip locked) or derate the output current.
[0] *
Trip
The frequency converter will trip (trip locked) and generate an alarm. Power must be cycled to reset
the alarm, but will not allow restart of the motor until the heat sink temperature has dropped below
the alarm limit.
[1]
Derate
If the critical temperature is exceeded the output current will be reduced until the allowable tem-
perature has been reached.
3.11.9 No Trip at Inverter Overload
In some pump systems, the frequency converter has not been sized properly to yield the current needed in all points of the operational flow-head
characteristic. At these points, the pump will need a current higher than the rated current of the frequency converter. The frequency converter can yield
110% of the rated current continuously for 60 sec. If still overloaded, the frequency converter will normally trip (causing the pump to stop by coasting)
and provide an alarm.
It may be preferable to run the pump at reduced speed for a while in case it is not possible to run continuously with demanded capacity.
Select
Function at Inverter Overload
to automatically reduce pump speed until the output current is below 100%
of the rated current (set in par.14-62
).
The
Function at Inverter Overload
is an alternative to letting the frequency converter trip.
The frequency converter estimates the load on the power section by means of an inverter load counter, which will cause a warning at 98% and a reset
of the warning at 90%. At the value 100%, the frequency converter trips and provides an alarm.
3 Parameter Description
ADAP-KOOL
®
Drive Programming Guide
124
MG.11.N1.02 - VLT
®
is a registered Danfoss trademark
3
Содержание ADAP-KOOL Drive
Страница 14: ...2 How to Programme ADAP KOOL Drive Programming Guide 14 MG 11 N1 02 VLT is a registered Danfoss trademark 2...
Страница 201: ...ADAP KOOL Drive Programming Guide 3 Parameter Description MG 11 N1 02 VLT is a registered Danfoss trademark 201 3...
Страница 222: ...4 Parameter Lists ADAP KOOL Drive Programming Guide 222 MG 11 N1 02 VLT is a registered Danfoss trademark 4...