Figure 15: Determination Of The Motor Protection Function Data From The Characteristics Of The - KEB COMBIVERT F6 Programming Manual

Protection functions
Only if the ratio Is/Id is higher than the response threshold of the motor protection
function
The tripping time at minimum threshold current is
at maximum current (dr12)
A counter is increased. If the counter reaches 100%, the error "14 : ERROR mo-
torprotection" is triggered.
If the ratio Is/Id < dr38, the counter is decreased with a factor defined by the recov-
ery time
counter needs to count from 100% to 0%.
The triggered error by the motor protection function can be reset at 98%.
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Figure 15: Determination of the motor protection function data from the characteristics of the motor man-
ufacturer
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(dr38 SM prot. min. Is/Id) the tripping time (ta) expires.
dr36 SM prot.time
(dr37SM prot. recovery time). The prot.recovery time is the time, which the
Motor in operating condition
Recommended current limit
cold motor
1fghfhMotor
dr35 SM prot.time min. Is/Id
Imax.
and
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