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2.2 Data monitoring and communication

The integrated data display, processing and communication of the device enables easy operation

of the solar inverter. Monitoring of the operational status and signaling of operational failures are

capable of being called up over the device display. The data interfaces enable the downloading of

data which can be evaluated with the aid of a PC system and allow continuous recording of operat-

ing data.

The best way of accessing this functionality is via a monitoring system, such as SolrenView, con-

nected to your inverter.

The read-out of the data on the display is possible when the inverter is connected to AC voltage.

2.3 Technical structure of the inverter

The photovoltaic voltage is adjusted so that the maximum power output of the PV modules is also

achieved with different solar irradiation levels and temperatures (MPP-Tracking). These inverters

have quite wide MPP range of suit for variety of PV modules by a variety of manufacturers. Mea-

sures must be taken to ensure that the maximum no- load voltage of 600 V is never exceeded.

Please note that the maximum no-load voltage will occur at the lowest temperatures anticipated.

You will nd more detailed information about temperature dependency in the data sheet for the PV

modules.

The high-quality aluminum casing corresponds to protection degree NEMA 4 / IP65 (water-jet proof

and dust-proof) and is protected by an anti-corrosion nish. The heat sink on the inverters

is designed in such a way that operation of the inverter is possible at ambient temperatures from

-13°F to +122°F (-25°C to +50°C) at full power and optimal efciency for either 240 V

or 208 V

AC grids.

Metal ns designed into the rear side of the inverter chassis are used to dissipate heat and protect

the unit. An internal temperature control protects the interior of the device. In case of high ambient

temperatures, the maximum transferable power is limited.

The solar inverter is controlled by microcontrollers which provide interface communication and the

values and messages on the front-panel display.

AC grid monitoring is done by an independent dedicated micro controller set up to meet the require-

ments of UL 1741 / IEEE 1547. This enables a connection of the solar inverter to the in-house grid.

Operator protection requirements are met by electrically isolating the grid from the PV module. The

electrical isolation between the grid and the PV module is equivalent to basic insulation. Maximum

operator protection is ensured by reinforced isolation between the grid, PV modules and accessible

interfaces (display, RS-485 interface and fan port). Relevant standards concerning electromagnetic

compatibility (EMC) and safety are fullled.

The solar inverter is functional in grid-parallel operation exclusively. An automatically Unintentional

Islanding function, which was accepted by a certication agency, guarantees secure disconnection

in case of circuit isolation or interruptions in power supply and avoid isolated operation.

DC arc-fault circuit interrupt (AFCI) is integrated into t

he Solectria PVI 3800TL, PVI 5200TL, PVI

6600TL and PVI 7600TL

. It complies the requirement as Type 1 device in UL1699B standard,

series arc faults can be detected.

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