GE Industrial Solutions DV-300 DC Drive Users Manual User Manual

Page 231

DV-300 Adjustable Speed Drives

——— FUNCTION DESCRIPTION ———

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.

aution

A wrong input of the values may cause the destruction of the device!

Time

Overload
current [312]

Base
current [313]

Overload
time [310]

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)