Vacon 100 INDUSTRIAL, Инструкция по применению

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vacon • 114 Parameters
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The underload curve is a squared curve set between the zero frequency and the field weakening
point. The protection is not active below 5 Hz (the underload time counter is stopped).
The torque values for setting the underload curve are set in percentage which refers to the nominal
torque of the motor. The motor's name plate data, parameter motor nominal current and the drive's
nominal current IH are used to find the scaling ratio for the internal torque value. If other than nom-
inal motor is used with the drive, the accuracy of the torque calculation decreases.
NOTE! If you use long motor cables (max. 100 m) together with small drives (
≤
1.5 kW)
the motor current measured by the drive can be much higher than the actual motor
current due to capacitive currents in the motor cable. Consider this when setting up
the motor underload protection functions.
Table 89. Motor underload protection settings
Code Parameter Min Max Unit Default ID Description
P3.9.4.1 Underload Flt 0 3 0 713
0 = No action
1 = Alarm
2 = Fault (Stop according to stop
mode)
3 = Fault (Stop by coasting)
See P3.9.4.5 for the underload
mode. When P3.9.4.5 = 0, Under-
load is determined by P3.9.4.2 -
P3.9.4.4. When P3.9.4.5 =1, the
fault is related to P3.9.4.6.
P3.9.4.2 Fieldweak. Load 10.0 150.0 % 50.0 714
This parameter gives the value
for the minimum torque allowed
when the output frequency is
above the field weakening point.
P3.9.4.3 Zero Freq. Load 5.0 150.0 % 10.0 715
This parameter gives value for
the minimum torque allowed with
zero frequency.
If you change the value of param-
eter P3.1.1.4 this parameter is
automatically restored to the
default value.
P3.9.4.4 Time Limit 2.00 600.00 s 20.00 716
This is the maximum time
allowed for an underload state to
exist.
P3.9.4.5 UnderloadDetectMode
Motor
Torque
Flow
Meter
Motor
Torque
1950
0 = Motor Torque
1 = Flowmeter (transducer
defined by P3.23.1)
P3.9.4.6 Minimum Flow 1 214748 l/min 300 1951
Value to determine underload
fault if P3.9.4.5 is 1
13006.emf