VB3/V5/VB5 series inverter
4
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M
M
M
Mechanical
echanical
echanical
echanical resonance
resonance
resonance
resonance point
point
point
point of
of
of
of load
load
load
load
The inverter may encounter the mechanical resonance point of load within certain output frequency range. Jump
frequencies have to be set to avoid it.
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Capacitor
Capacitor
Capacitor
Capacitor and
and
and
and resistor
resistor
resistor
resistor
Because the inverter output pulse wave, capacitor and resistors shouldn't be connected with the output terminals of the
inverter, or the inverter may trip or components may be damaged; Besides, don’t connect switch components such as air
switch and contactor with the output terminals is recommended, as shown in Fig.0-1(If switch components need to be
connected with the output terminals, make sure output current of the inverter is zero when switch is acting).
Fig.0-1
Fig.0-1
Fig.0-1
Fig.0-1
Capacitor is prohibited to be connected with
output terminals of inverter
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Derat
Derat
Derat
Derateeee according
according
according
according to
to
to
to basic
basic
basic
basic frequency
frequency
frequency
frequency setting
setting
setting
setting
When the basic frequency is lower than the reference frequency, please consider duration for the motor so as to avoid
motor’s damage caused by overheating.
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Running
Running
Running
Running at
at
at
at frequency
frequency
frequency
frequency above
above
above
above 50Hz
50Hz
50Hz
50Hz
If running at frequency above 50Hz, besides the increment of vibration and noise, the ranges of running speed of motor
shaft and mechanical device have to be guaranteed. Be sure to make an enquiry first.
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The
The
The
The electro-thermal
electro-thermal
electro-thermal
electro-thermal protective
protective
protective
protective value
value
value
value of
of
of
of motor
motor
motor
motor
If the applicable motor is selected as per requirements, the inverter can perform the thermal protection to the motor. If the
ratings of applied motor are not in compliance with the inverter, be sure to adjust the protective value or adopt other
protective measures to guarantee the safe running of motor.
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Altitude
Altitude
Altitude
Altitude and
and
and
and derat
derat
derat
derateeee
When the altitude is higher than 1000m, the cooling effect of inverter is deteriorated because of the rareness of air, deration
must be considered, shown in Fig.0-2 which indicates the relationship between the altitude and rated current of frequency
inverter.
Fig
Fig
Fig
Fig.... 0-2
0-2
0-2
0-2
The relationship between the altitude and rated
current of frequency inverter
