Dc Ground Fault Detection And Interruption; Ac Wiring - Solectria Renewables PVI 10 KW Installation And Operation Manual

Installation and Operation Manual (Rev B)
WARNING: The PV grounded connections should not be bonded to the ground system
at any point outside of the inverter. This bond is made in the GFDI circuit that is
integral to the inverter.
4.3

DC Ground Fault Detection and Interruption

Every PVI 10-15KW inverter is equipped with an automatic DC Ground Fault Detection and
Interruption (GFDI) circuit. When a single ground fault on an ungrounded circuit exceeding the
pickup value is present in the PV array or in the DC wiring to the inverter, the DC GDFI fuse will
blow and a ground fault will be signaled by means of a yellow LED and a message on the front
LCD display.
PVI 10-15KW
WARNING: In the event of a ground fault, DO NOT TOUCH any equipment (including,
but not limited to: the inverter, the PV array disconnects, the PV array combiners, the
PV panels, the PV racking system). Immediately contact the installer or another
qualified person to locate and repair the source of the ground fault. Be aware that
normally grounded conductors and equipment may be energized and may pose a
significant shock and / or fire hazard.
WARNING: If the GFDI fuse blows upon connection of one or more combined strings,
a ground fault in the array must be located and eliminated before proceeding. The DC
ground fault is eliminated when the GFDI fuse can be replaced and remains intact.
Failure to obey these instructions may cause the grounded conductor to rise to
potentially unsafe voltage levels.
WARNING: Even when the DC disconnect is in the off position, the ungrounded DC
conductor leading up to the DC disconnect will remain live on the PV side as long as
the PV modules are in daylight. The inverter side of the DC disconnect will also remain
live after the disconnect has been shut off until 60 seconds after the LEDs turn off, as
DC bus capacitors in the inverter discharge.
4.4

AC Wiring

For the 3-phase AC wiring, for 208V, 240V, and 480V, three conductors are required (one per
phase) plus additional conductors for grounds. For 600V, three conductors and a neutral are
required, plus additional conductors for ground. 90°C copper conductors must be used. The AC
DOCR-060011
DC Ground Fault Current Pickup
3/4 A
Table 4.4 – DC GFDI Specifications
PVI 10KW, 13KW, 15KW
Maximum Trip Time
1 s
11