Installation and Operation Manual (Rev B)
PVI 10KW, 13KW, 15KW
13
DOCR-060011
entrance. With larger wires, the AC voltages at the inverter will be closer to the voltages at the
point of interconnection, allowing for the most reliable inverter operation.
The PVI series of inverters require a
clockwise
phase sequence for proper
operation. If a phase sequence error is displayed on the screen during
commissioning of the inverter, simply swap any two phases to correct the phase
sequence.
4.5
AC Ground Fault Detection
The PVI 10-15KW series of inverters are not equipped with AC ground fault protection. When
AC ground fault protection is used on the onsite electrical service, determine if the ground fault
device is listed to be backfed. The inverter AC output should be connected on the supply side of
the device unless the device is specifically listed for a backfeed application, then the inverter
may be installed on either the load or supply side of the device. Always consult the AC ground
fault manufacturer for guidance on backfeeding their devices in a Code compliant manner.
4.6
Lightning and Surge Protection
The PVI series is designed with certain protections against surges in voltage including
certification to ANSI/IEEE 62.41/62.42. However, added protection and solid grounding
provisions are important for best protection against utility surges and surges created by indirect
lightning strikes.
The installation of a UL listed lightning arrester of the correct specification is recommended on
both the DC and AC inputs of the inverter. This should be installed outside of the disconnect
switches and wired using the manufacturer's installation instructions. This device gives
important added protection from indirect lightning strikes and the resulting voltage surges that
provide protection beyond the inverter's IEEE 1547 requirements.
The best protection against damage from lightning and other voltage surge sources is proper
grounding of the system. When required by local codes, it is recommended to establish a
grounding electrode system specifically for the PV array, located as close as practical to the
array. It is also recommended to have the lightning protection system of the building checked
and upgraded if needed before the PV system is installed. These added protections are
especially important for areas prone to thunder storms and possible nearby lightning strikes.
Although these added precautions will not guarantee that there will be
no
damage from
lightning, they can help prevent or limit potential damage.
4.7
SolrenView Monitoring
