PV Powered 2500 Guia de Instalação descarregar pdf (Página 30)

Installation SMA Technologie AG

Page 30 SB25_30-11:SE0307 Installation Guide

6.2.2 PV String (DC) Connection

To connect up the input, follow these steps:

1. Make sure the PV generator connectors have

the right polarity and do not exceed the

maximum string voltage of 600 V (DC). See

also section 5.2 "PV Generator Requirements"

(Page 15).

2. Taking one DC plug connector at a time,

measure the direct current voltage between one

DC plug connector of a string and ground

potential.

3. If the measured voltages are constant and their

total is roughly the same as the open circuit

voltage of the string, then there is a ground fault

in this string. Its approximate location can be

deduced from the relationships between the

voltages.

4. Repeat points 2 and 3 for each string.

5. Connect up the faultless PV generator strings to

the inverter.

6. Close the unused DC input sockets with the caps

included in the delivery.

Warning!

Dangerously high voltages may be present. Danger of death!

Warning!

Do not connect strings to the Sunny Boy that contain a ground fault until

you have fixed the ground fault in the PV generator!

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PV Powered 2500 Guia de Instalação Página 30