PV Powered PVP260kW Informações Técnicas descarregar pdf (Página 22)

DC Combiner Sub Panel

The inputs from the PV array are landed in the DC Combiner sub panel. This sub panel

includes the positive, negative and ground busbars. Optional fused subcombiner and

subcombiner monitoring are also located in the DC Combiner Sub Panel if selected.

DC Distribution PCB

The DC Distribution PCB is located on the DC sub panel. It includes the DC voltage

sensing and DC soft start circuit. The DC Distribution PCB also houses the GFDI

(Ground Fault Detector/Interrupter) circuit. The purpose of the GFDI is to detect a ground

fault (unintended current ow from the solar panels to earth ground) and in the event of a

ground fault, stop AC power production.

Figure 1-8 DC Distribution PCB

WARNING

Risk of Electrical Shock. The GFDI functions using a 5A fuse to connect or

bond the solar array Negative (or the solar array Positive, if using a positively

grounded panel array) to earth ground on the DC Distribution PCB.

AVERTISSEMENT

Risque d’électrocution. Le GDFI utilise un fusible de 5A pour connecter le

pôle négatif du réseau de photopiles (ou le pôle positif, si un réseau est mis à

la masse positivement) à la terre sur le PCB de distribution de courant direct.

If the ground fault current exceeds 5A between the grounded array terminal and the earth

ground, the Ground Fault Detector Interrupter (GFDI) fuse will open and disconnect the

solar panels from their ground reference, interrupting the ground fault. In this situation,

the inverter will cease operation, display a fault message and the LED on the DC

Distribution PCB will illuminate red. If a GFDI current of 3-5A exists, the inverter will

indicate a ground fault warning.

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