Schneider Electric Xantrex XW Installationsanleitung PDF herunterladen (Seite 49)

Ground Faults in a Normally Ungrounded Array

975-0540-01-01 Revision B 3–5

This guide is for use by qualified personnel only.

3. Remove the blown fuse and replace it with a new AC/DC midget cartridge,

DC-rated 600 VDC, 1 A (Littelfuse KLKD 1 or equivalent). Be careful not to

damage the fuse clips, circuit board, and surrounding components.

4. Replace the wiring compartment cover.

5. Clear the fault and reset the system by removing and then reapplying both

PV and battery power.

Ground Faults in a Normally Ungrounded Array

On a normally ungrounded (floating) array, the ground fault protection system

indicates a fault when a short circuit or lower than normal resistance exists

between the array and ground. Before resetting the fault and attempting to restart

the system, it is important to have qualified service personnel, such as a certified

electrician or technician, determine the cause of the ground fault and effect

repair.

To mitigate a ground fault in a normally ungrounded array:

1. Make sure the PV and battery disconnect switches are open and the charge

controller is de-energized.

2. Search or troubleshoot for a ground fault on the PV array (for example, a

broken PV panel or pinched PV wire).

3. Clear the fault and reset the system by removing and then reapplying both

PV and battery power.

DANGER

HAZARD OF ELECTRIC SHOCK

If a ground fault is indicated, normally grounded PV conductors could be

ungrounded and energized. Before working on any portion of the array or

wiring, make sure that portion of the array is de-energized by blanketing, use

of disconnects, or other safe working procedures and by testing for voltage

before beginning work.

Failure to follow these instructions will result in death or serious injury.

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Schneider Electric Xantrex XW Installationsanleitung Seite 49