Delios DLS 300, Инструкция по эксплуатации

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DLS 300 / 450 / 600
31
Code 240.010.0001
The DLS systems are fitted with a residual current monitoring unit compliant with safety standards required
by Standard IEC/EN 62109-2:2011 (please refer to paragraph 4.8.3.5 of the above mentioned Standard).
More specifically, they are fitted with a redundant device against earth leakage sensitive to all current
components, both direct and alternating. The measurement is simultaneously carried out by two different
processes: if only one of the two
processes detects a fault, the converter will be disconnected from the grid.
If must be noted that the device built into the converter protects the system from faults only occurring up-
stream of the inverter AC terminals (i.e. from the inverter to the PV modules). Leakage currents that could
occur in the AC section between the pick up/entering point and the DLS are not detected.
If, in compliance
with local standards or in specific cases, the use of an external circuit breaker is required, we rec -
ommend that a type A switch with fault current of at least 100mA is used.
DELIOS s.r.l. declares that the construction of the DLS systems does not produce earth leakage
direct currents and therefore, in compliance with article 712.413.1.1.1.2 of section 712 of Standard
CEI 64-8/7, a type B circuit breaker in compliance with standard IEC 60755/A 2 is not required.
Only one DLS system should be connected to each load isolator.
A threaded cap fuse cannot be used as a load isolator.
Do not use measuring devices with maximum input voltage lower than 1000V.
The protective earth conductor must have a cross-section equal to or lower than the cross-section of the
cables connected to the national electricity grid (AC) and, in any case, they must comply with current stand-
ards.
4.6.2 Connection to the AC National Electricity Grid
See the connection diagram shown in Figures 05 and 06 .
Make sure that local legislations is complied with.
Make sure that the electricity provider connection conditions are complied with.
Connection of multiple inverters to the national electricity grid must comply with the maximum power imbal-
ance prescribed by current legislation.
The resistance of the cable connected to the national electricity grid must be lower than 0.5Ohm.
R < 0.5Ohm
The power dissipated on the line must be lower than 1% of the nominal power.
Conductor cross-section
Line maximum length
DLS 300 DLS 450 DLS 600
2.5 mm
2
8 m - -
4.0 mm
2
13 m 12 m 10 m
6.0 mm
2
23 m 18 m 15 m
Before starting the connection operations, make sure that the AC line external main switch is set to off and
that the AC GRID and AC OUT lines internal circuit breakers are disconnected.