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Installation manual
Opening the inside doors of the cabinet is conditional on both the AC thermomagnetic circuit breaker
and the DC circuit breaker being in the open position.
When checking that there is no voltage, wearing dielectric gloves and safety goggles approved for
electrical hazards is required.
After setting the AC thermomagnetic circuit breaker and DC circuit breaker to OFF, wait at least 10 minutes before
opening the inside doors. Internal capacitances may still hold hazardous voltages. Then disconnect the current at the
auxiliary supply QAUX.
During inspection and handling work:
Take care, since even with the AC thermomagnetic circuit breaker and the DC circuit breaker on OFF, cables directly
connected to the grid or panels may still hold hazardous voltages. This includes feed strips and wires between
switches/breakers.
As long as the panels are exposed to the light, the DC cables will carry potentially dangerous voltage levels.
5.5.2. Description of cabling connections
These units have the following cabling connections:
•
Plates for DC connection.
•
Plates for AC connection.
•
Terminal strips for connecting the insulation fault indicator.
•
Copper bar with threaded holes for earthing connection.
•
Connecting the auxiliary supply (optional depending on the model and kit included).
As long as the panels are exposed to the light, the DC cables will carry potentially dangerous voltage
levels.
Never handle the connections before disconnecting the inverter from the grid and the PV array.
5.5.3. Order of connecting the unit
The basic connections to be made with the units are as follows, in this order:
1.
Connecting the insulation failure detection switch (optional)
2.
Communication line (optional)
3.
Connecting the various grounding connections
4.
Connecting the auxiliary supply (optional depending on the model and kit included)
5.
Connecting the 3-phase inverter system to the power grid
6.
Connecting the DC cables from the PV array
The following sections describe how to make these connections.
ABB2000IKI01
Ingeteam
39
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