Delios DLS 300 - PV Panels Connection

DLS / DLS-C Series
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Cod.: 240.010.0042
DELIOS s.r.l. declares that the construction of the DLS does not produce direct earth fault currents
and therefore, in accordance with article 712.413.1.1.1.2 of section 712 of the Standard CEI 64-8/7
standard, a type B RCD, according to IEC 60755/A2 standard, is not required.
Connect only one DLS system for each load circuit breaker.
A threaded plug fuse cannot be used as a load circuit breaker.
Do not use measuring instruments with a maximum input voltage lower than 1000V.
The protective earth conductor must have a cross-section at least equal to or greater than the cross-section
of the cables for connection to the public grid (AC) and in any case in accordance with the requirements of
local regulations.
5.2 PV panels connection
See the connection instructions shown in Figure 09 and Figure 10.
Before starting the connection operations, make sure that the external AC line main switch is disconnected
and that the AC GRID and AC OUT circuit breakers are disconnected.
Before starting the connection operations, make sure that the DC line switch is off.
Before starting the connection operations, make sure that the AC BYPASS switch is in the "1" position.
The conductors from the solar panels are always live.
All DLS models are equipped with two input channels (double MPPT maximum power tracker). Strings of
PV modules having the same type, number, orientation and inclination must be connected to the same
channel.
The two independent inputs can also be connected in parallel and used as a single input respecting the
above stated requirements.
All the input parameters that must be respected for correct operation of the DLS system are shown in the
"technical data" table.
The voltage applied to each input channel of the DLS, determined at the minimum rated temperature for
operation, must NEVER exceed 600V. Exceeding the limit can cause serious damage to the DLS.
Never disconnect the DC connectors before having switching off the circuit breaker (external or internal).
Any disconnection of the connectors during operation can generate large electrical arcs.
An electric shock shock can be fatal.
An electric discharge can set re to the inverter.
An electrical discharge can cause res capable of spreading to the surrounding areas.