Toshiba TOSVERT VF-MB1, Instruction Manual

Page: 200 / 350

E6581697
F-80
6
6.24 Protection functions
6.24.1 Setting motor electronic thermal protection
thr
: Motor electronic-thermal protection level 1
 173 : Motor electronic-thermal protection level 2
f607 : Motor 150% overload detection time
f632 : Electronic-thermal memory

Function
This parameter allows selection of the appropriate electronic thermal protection characteristics
according to the particular rating and characteristics of the motor.
[Parameter setting]
Title Function Adjustment range Default setting
thr
Motor electronic-thermal protection
level 1
10-100 (%) / (A) 100
f173
Motor electronic-thermal protection
level 2
10-100 (%) / (A) 100
f607
Motor 150% overload detection time 10-2400 (s) 300
f632
Electrical-thermal memory 0: Disabled, 1: Enabled 0
Refer to section 3.5 for details.
Note 1: The 100% standard value is the rated output current indicated on the nameplate.
6.24.2 Setting of stall prevention level
f601
: Stall prevention level 1
f185
: Stall prevention level 2
Caution
Prohibited

Do not set the stall prevention level (
f601
) extremely low.
If the stall prevention level parameter (
f601
) is set at or below the no-load current of the motor, the
stall preventive function will be always active and increase the frequency when it judges that
regenerative braking is taking place.
Do not set the stall prevention level parameter (
f601
) below 30% under normal use conditions.

Function
This parameter adjusts the output frequency by activating a current stall prevention function against a
current exceeding the
 -specified level.