Vacon 10, Полное руководство пользователя

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parameter descriptions vacon
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9
9.9 Protections (Control panel:Menu Par->P13)
13.5 S
TALL PROTECTION
0 = No action
1 = Alarm
2 = Fault, coast
The motor stall protection protects the motor from short time overload situa-
tions such as one caused by a stalled shaft. The stall current is I
nMotor
*1.3,
stall time 15 seconds and stall frequency limit 25 Hz . If the current is higher
than the limit and output frequency is lower than the limit, the stall state is
true and the drive reacts according to this parameter. There is actually no real
indication of the shaft rotation.
f
I
Inmotor *1.3
25Hz
Stall area
Figure 9.12: Stall characteristics
13.6 U
NDER LOAD PROTECTION
0 = No action
1 = Alarm
2 = Fault, coast
The purpose of the motor underload protection is to ensure that there is load
on the motor when the drive is running. If the motor loses its load there might
be a problem in the process, e.g. a broken belt or a dry pump.
The underload protection time limit is 20 seconds, which is the maximum time
allowed for an underload state to exist before causing a trip according to this
parameter.