The control device can protect the motor from overloads by digitally controlling the absorbed current against the set
rated current.
Instead, it is necessary to install overcurrent and short-circuit protection devices, such as fuses and circuit break-
ers, upstream of the device. These trigger in the event of failure of a component inside the device.
Install on the AC side:
Supply voltage
Model
Recommended fuse
gC
Recommended circuit breaker
ABB MCB S200
1 x 230 VAC
SUND 50
10
S201-C10
Install on the DC side:
• DC disconnector of suitable voltage and current
• DC fuses of suitable voltage and current on both the positive and negative poles. Generally, DC fuses are
chosen for a current that is approximately double the short-circuit current of a string of panels and are installed
only if the photovoltaic system consists of three or more strings.
• surge arresters of suitable voltage and current
7.3. Connecting cables
WARNING
The connecting cables must comply with local regulations, feature the appropriate cross-section, and
meet the requirements for voltage, current, and temperature.
7.3.1. Power cable
WARNING
Always use cables with appropriate cable lugs, which may be supplied with the product.
7.3.2. Control cables
Model
Maximum cross-section of the control cables
Tightening torque [Nm]
Control terminals of all
models
1 mm
2
0,5
WARNING
Use shielded cable for control cables.
WARNING
Always use cables with appropriate cable lugs, which may be supplied with the product.
7.4. Electromagnetic Compatibility (EMC)
The device meets the requirements of electromagnetic compatibility according to the EN61800-3 standard.
However, to ensure the electromagnetic compatibility of the system in which it is installed, it is necessary:
• use ground connection cables that are as short as possible.
• use shielded signal cables with the shield connected at one end only.
WARNING
Install signal, motor, and power cables separately from each other at a distance of at least 30 cm. If
the signal cables meet the power cables, cross them perpendicularly.
7.5. Electrical connections
SUND
16