Ingecon SUN 125 TL U 208 Outdoor, Installation Manual, Page: 53 / 88

ABB2000IKI01 53
Installation manual Ingeteam
5.5.13. Connecting to the PV array
The cables for connecting the unit to the PV array enter through conduits in the base.
Before any handling, check that there is no electrical hazard in the voltage input from the PV array.
Never forget that whenever they receive solar radiation, the panels’ terminals generate voltage.
The inverter can therefore have voltages of up to 1000 V inside even when not connected to the grid.
When checking that there is no voltage, wearing dielectric gloves and safety goggles approved for
electrical hazards is required.
Depending on the configuration of the unit ordered the following cases should be considered:
• With ground connection on the positive pole.
• With ground connection on the negative pole.
• No grounding.
The equipment has two copper strips with four 0.51 mm (13 mm) diameter orifices for entering with 31/64” M12 size
ring-terminated cables.
This strip corresponds to the grounded polarity.
The equipment has four strips with 0.51 mm (13 mm) diameter orifices to take 31/64” M12 size ring-terminated
cables.
These strips correspond to the non-grounded polarity.
The various strips can be seen below.
Grounded polarity
Non-grounded polarity
The maximum admissible gauge is two 0.19 in² (127 mm²) cables per pole. In each hole a cable can be connected
from each side of the strip. So up to eight cables can be connected to the non-grounded strip and a further eight to
the grounded one.
To avoid arcing, once the wires are connecting to the strips, check the safety clearances between live parts on each
strip or any other metal point on the unit. We recommend a clearance of 0.79 in (20 mm), with a minimum of 0.40
in (10 mm).
If the distance between the inverter and the PV array connection point requires the use of longer cables, an external
distribution box must be used close to the inverter to make this connection.
To access these terminals the terminal cover must be removed.
After working on the terminals the polycarbonate guard must be put back into place.