To Resolve A Ground Fault - Advanced Energy AE 600 User Manual

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Advanced Energy

AVERTISSEMENT:

Pour que le circuit GFDI fonctionne normalement, la prise de terre de

sécurité du système PV ne doit pas être branché aux câbles positifs ou

négatifs des piles PV. Brancher la prise de terre de sécurité au pied des piles

ou à toute autre partie que l'onduleur causerait une mise hors circuit du

GFDI. Ceci ne empêcherait le fonctionnement normale du circuit GFDI et

créerait des conditions de fonctionnement potentiellement dangereuses.

The GFDI functions using a 5 A 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 subcombiner panel. If the ground fault current exceeds 5 A between the

grounded array terminal and the earth ground, the 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 and show a ground fault message on

the inverter display.

To Identify the Cause of a Ground Fault

1. Turn the ON/OFF switch on the display to the OFF position.

2. Turn the AC disconnect to the power OFF position.

The display on the upper front panel should be inactive.

3. Identify the cause of the ground fault by checking the following items:

a. A configuration error during commissioning.

b. Switching the grounded conductor in the DC disconnect.

▪ For a negatively grounded system, the positive leg should be broken in the

DC disconnect.

▪ For a positively grounded system, the negative leg should be broken in the

DC disconnect.

c. A pinched wire in the installation connecting some part of the array or DC

wiring to earth ground.

d. Mismatched array strings in a multiple inverter installation.