abora aH72 SK, Handbook, Page: 24 / 31

PANEL HANDBOOK aH72 SK
V 6.0
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cable's own weight can generate electrical contact failures, which can lead to electrical arcs with the
corresponding consequences, such as fires.
5.2.3 Direct Current PV connectors
The hybrid panels have a connection box on the back side from which two cable strands (one positive
and one negative) with special PV connectors (compatible with MC4 connectors) male and female
come out. These connectors provide a safe, durable and effective electrical contact. They also simplify
and increase the safety of the installation work. The male and female connectors connected in a
photovoltaic system should be of the same type and from the same manufacturer
5.2.4 Strings breaker of fuses
The DC breaker or fuses must have the following characteristics:

The circuit breaker must isolate all active conductors (generally two poles to isolate the positive
and negative conductors from the PV strings or set of strings).

The breaker must be DC rated and capable of operating at the maximum calculated system
voltage (typically 1000V and 15A-16A).
5.2.5 Direct current general circuit breaker
It must be installed in one of the following ways:

A physically separated disconnect switch mounted next to the inverter.

A disconnect switch that is mechanically connected to the inverter, which allows the inverter
to be removed from the section containing the disconnect switch without electrical risk

A disconnect switch that is built into the inverter, if the inverter includes an isolating means
that can only operate when the disconnect switch is in the open position (e.g. plugs accessible
only after the disconnect handle is removed from the switch)

An integral disconnect switch on the inverter, if the inverter includes an isolating means that
can only be operated with a tool and is labeled with a warning sign or text ("Do not disconnect
under load").
5.2.6 General electrical installation information
Each hybrid panel has a positive and negative connector on the back of the panel. The panels must be
interconnected in a series sequence according to the circuit diagram.