SPC Series Solar Pump Inverter Options
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Note:
Analog signals and digital signals cannot share a same cable, and their cables must
be routed separately.
Before connecting the input power cable of the inverter, check the insulation
conditions of the cable according to local regulations.
Recommended power cable sizes for standard inverter models
Recommended cable size (mm
2
)
Note:
The cables recommended for the main circuit can be used in scenarios where the
ambient temperature is lower than 40°C, the wiring distance is shorter than 100 m,
and the current is the rated current.
If the control cable and power cable must be crossed, the angle between the control
cable and power cable must be 90 degrees.
If the inside of motor is moist, the insulation resistance is reduced. If you suspect the
inside of motor is moist, dry and re-measure the motor.
A.3 Reactor
When the distance between the inverter and motor is longer than 50 m, the parasitic
capacitance between the long cable and ground may cause large leakage current, and
overcurrent protection of the inverter may be frequently triggered. To prevent this from
happening and avoid damage to the motor insulator, compensation must be made by
adding an output reactor. When the inverter is used to drive multiple motors, take the total
length of the motor cables (that is, sum of the lengths of the motor cables) into account.
When the total length is longer than 50 m, an output reactor must be added on the output
side of the inverter. When the distance between the inverter and motor ranges from 50 m
to 100 m, select the reactor according to the following table. If the distance is longer than
100 m, contact INVT's technical support technicians.
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