Installation
2–8
975-0400-01-01
Internal Ground Fault Protection
The XW SCC has a PV ground fault protection (PV-GFP) fuse (600 V, 1 A) and a
PV negative-ground jumper located inside the wiring compartment. These
provide a negative ground bond and ground-fault protection for negative
grounded PV array systems common in North American installations. Replace the
fuse with Littelfuse KLKD 1 or equivalent.
WARNING: Fire hazard
•
Fuses must only be replaced by qualified service personnel, such as a certified
electrician or technician. For continued protection against risk of fire, replace only
with the same type and rating of fuse.
•
If PV-GFP is enabled, do not ground either PV negative or battery negative circuits.
Grounding these circuits will defeat the internal PV-GFP protective function. See
Figure 2-9 on page 2–14 for recommended battery circuit wiring.
WARNING: Shock hazard
Disconnect PV and battery circuits before removing the grounding connections or before
removing or installing the PV-GFP fuse. Wait at least 4 minutes for the internal circuitry to
discharge before servicing the unit.
Important:
Only one Charge Controller is to have the PV-GFP fuse installed in
installations with multiple parallel XW SCCs. Before mounting and connecting the XW
SCCs, remove the PV-GFP fuse from each unit except one.
CAUTION
The factory default configuration of the XW SCC will ground the PV array negative to the
chassis ground through the internal PV-GFP fuse. The PV-GFP circuit must be disabled
for ungrounded PV arrays.
Figure 2-6
XW SCC Safety Ground Connector
Chassis ground terminals (2)
This symbol identifies the
protective conductor
(grounding) connection.
Ground fault protection
fuse (behind wiring
terminals)
Содержание XW-MPPT60-150
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