GE Industrial Solutions DV-300 DC Drive Users Manual - Manual (Page 231)

DV-300 Adjustable Speed Drives
——— FUNCTION DESCRIPTION ———
6
103
from thermal overloads with cyclical loads.
The max. possible values (as for the converter) are obtainable through the following curves. The operating point
must always be below the corresponding curve. At the verification it is to state, that the torque and the current
are proportional.
The Overld available parameter allows to understand if the drive is ready to supply an overload current. If the
current exceeds the value defined by the Base current parameter, the time set by the Overload time parameter
starts to run. Once this time has expired, the current is limited again to the Base current. This takes place irre-
spective of how high the overload was and how long it lasted. A subsequent overload is permissable immediatly
after the time set by the Pause time parameter. If Overload mode is set to “Curr not limited”, The current is not
limited but the Overload state parameter indicates whether it is out of the defined range.
C
aution
! A wrong input of the values may cause the destruction of the device!
Time
Overload
current [312]
Base
current [313]
Overload
time [310] Overload
time [310] Overload
time [310] Pause
time [311] Pause
time [311] Waiting
time
Overld
available [406]
Overload
state [407]
T current
Limits
Figure 6.14.6.1: Overload control (Overload mode = curr limited)
Time
Overload
current [312]
Base
current [313]
Overload
time [310] Overload
time [310] Overload
time [310] Pause
time [311] Pause
time [311] Waiting
time
Overld
available [406]
Overload
state [407]
T current
Limits
Figure 6.14.6.2: Overload control (Overload mode= curr not limited)