Operation and installation manual
Page 19 of 96
(PVI-STRINGCOMB (-S, -MC, -S-MC) - Rev:1.0)
Thanks to the 10 channels available, each device allows for connecting up to 10
strings individually, or 20 strings in parallel pairs. This is made possible thanks to
the double-hole terminal board on each channel (from 1 to 10). Each channel is
also protected by two fuses.
The "S" version has:
•
a special DC switch for direct current disconnection with high voltages
(1000Vdc) in class DC21A; this allows for disconnecting the string group
concerned from the inverter downstream.
•
remote disconnection control and an auxiliary contact for displaying the
switch status.
Every device features:
•
one input for resistance PT100
•
analogue and digital inputs to allow for checking external magnitudes
1
,
such as, for example, the temperature of the photovoltaic cells, solar
irradiation, environmental temperature, wind force, etc.
•
a cord-type antitheft device.
•
a protection against overvoltage for the serial line RS485 (supplied as an
option).
•
a protection against overvoltage for the DC line.
1
The 24V sensors for measuring environment parameters can be fed by a source
external to or the one internal to the PVI-STRINGCOMB(-S) (Ref.§9.3.3, §9.3.8)