SV800/SV800A User Manual 2 Production Introduction
11
P0-04
～
P0-06 (motor over-torque protection); The output current of the inverter is also limited
by I
Max
, allowing continuous operation for 1 minute / 5 minutes at 40
℃
; P
HH
is the typical
motor power adapted for high heavy load applications.
Fig.2-5 Overload protection diagram
Overload protection:
Both the inverter and the motor will perform overload protection and over-torque protection.
The motor protection parameters can be set in the inverter. When the inverter output current is
1.5 times of the rated current (or I
Max
), it is allowed to run for 1 minute / 5 minutes at 40
℃
, as
shown in Figure 2-5.
The guidance of derating using:
When the user needs the motor to output more than 1.5 times of the rated torque, the inverter
should be derated used as described above in the heavy load application. When the ambient
temperature of the inverter, altitude and other factors changed or the carrier frequency of the
inverter is greater than the factory default value, derating using (passive) is required; In addition,
when the motor is required to run at a very low speed for a long time, the carrier frequency must
be reduced or the inverter must be derated. Derating method as shown in Table 2-2 or you can
consult the manufacturer.
Table 2-2 The guidance of inverter derating using
Derating factors
Derating guidance
Temperature
The rated value of the inverter is measured at 40 °C. If the ambient temperature rises, the capacity should
be reduced by 3%/1 °C and the maximum ambient temperature is 50 °C.
Altitude
After the altitude is higher than 1000 meters, derating 1% for each 100 meters.
Carrier
frequency
When the carrier frequency of the inverter is higher than the factory default value, in principle, the inverter
should be derated used by one grade or consult the manufacturer directly.
Current or oL%
t/min
1.5I
N
1.05I
N
1
2
3
4
5
oL%=100%
Overload counting curve
Current amplitude
