Inverter Operation; Pre-Commission Check - Eaton Power Xpert Solar 1500 User Manua

Inverter Operation

The inverter's installation, operation, and maintenance is
intended for qualified personnel who are trained for
electrical-power systems used within the inverter, the
medium-voltage transformer, and 1,000-volt photovoltaic
systems. The inverter can connect to medium voltage up to
35 k, with the appropriate transformer. The installation is
intended for licensed electrical contractors, employing
qualified master and journeymen electrical technicians
familiar with 1000 V PV systems.
DANGER of Electric Shock Hazard
WARNING!
CAUTION!
NOTICE!
Operation of the inverter, energizing both the PV and AC
circuits, switching circuit breakers and interacting with the
inverter, its control power, the transformer and its utility
connection, and all connected PV equipment requires
adherence to electrical safety guidelines, as set forth in the
NEC, NFPA70E, OSHIA, and all local, regional, utility, and
company(s) policies.
Photovoltaic inverters utilize both DC and AC voltages and
are subject to external backfeed-voltage and energy sources
from the PV array, transformer, other inverters, and AC
switchboards and switchgear at the site. Understand the
disconnecting means available at the site, both PV (DC) and
AC is paramount to safe work practices.
Pay attention to all AC and DC arc-flash and electric-shock
equipment labels, their indicated working and boundary
distances, and all posted safety notices and labels.
Non-labeled equipment must be evaluated prior to work.
Damaged or missing arc-flash and electric-shock labeling
shall and must be replaced.
Do not proceed to the install, energize or operate the inverter
unless authorized.
Power Xpert Solar 1500/1670 kW Inverter MN141001EN—October 2014 www.eaton.com

Pre-Commission Check

Prior to energizing the inverter for the first time, complete a
thorough inspection. Verify that incoming and outgoing wires
and conductors are properly terminated and
securing-fasteners torqued. Check that the inlet and outlet air
ducts are not blocked and the filter material is clean and in
place. Verify that all tools used in the installation are
removed, any protective and safety covers that were
removed during non-energized installation tasks are properly
re-installed, and any debris from the installation process is
removed from within and around the inverter. The immediate
area shall be clear from obstructions. Maintain the
equipment-clearance requirements as per Code and Table 5
on Page 15, utilizing whichever is the maximum distance.
Never use compressed air to remove debris from inside or
outside the inverter.
To prevent damage to inverter-controllers, circuit-boards, and
electronic components, use only ESD-free Vacuum
equipment to clean inside the inverter and the air-filters.
Notice: Damage to components due to Electrostatic
Discharge (ESD) is not covered by warranty.
Never use water to clean or allow water or fluids to enter the
inverter cabinets.
Working from the solar modules, ensure all strings and
source-combiners are properly wired. Verify no PV-positive
and PV-negative conductors are reversed. Continue this
polarity-check procedure for all array re-or-sub combiners and
external PV-disconnects. Leave the PV-source combiners or
final/last photovoltaic-disconnecting-means (external to the
inverter) OFF (open circuit) prior to commissioning and
operating the inverter.
At the inverter, verify the PV-positive and PV-negative
conductors are properly wired for polarity and securely
terminated. Ensure all equipment ground circuits are installed
and the PV system is properly bonded to the GET and
establishes the required PV grounding electrode system as
per Code. Only when the PV circuits are verified, shall the
inverter be energized.
Prior to scheduling inverter commissioning services, obtain
from Eaton and complete the:
Power Xpert Solar 1500/1670 kW Inverters
Pre-Commissioning Installation Checklist
Have this completed form available, or return this completed
form to Eaton, to ensure efficient on-site inverter
commissioning service. Allow at least 2 weeks for
commissioning services after completing the
pre-commissioning installation checklist and scheduling the
service.
Note: Due to the nature of PV systems, inverter
commissioning is only conducted during dry weather.
Inverter Operation
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