General installation warnings
The TRIO transformerless inverter is designed and tested according to international safety
requirements (UL1741/IEEE1547); however, certain safety precautions must be observed when
installing and operating this inverter. Read and follow all instructions, cautions and warnings in
this installation manual.
All operations regarding transport, installation start-up, and maintenance must be carried out by
qualied, trained personnel and in compliance with all prevailing local codes and regulations.
Assembly warnings
Prior to installation, inspect the unit to ensure absence of any transport or handling damage,
which could affect insulation integrity or safety clearances. The failure to do so could result in
safety hazards.
Assemble the inverter per the instructions in this manual. Use care when choosing the installation
location and adhere to specied cooling requirements.
Unauthorized removal of necessary protection features, improper use, incorrect installation or
operation may lead to serious safety and shock hazards and/or equipment damage.
Electrical connection warnings
This grid-tied inverter system operates only when properly connected to the AC utility grid. Before
connecting the TRIO grid-tied inverter to the AC utility grid, contact the local power distribution
company to receive the appropriate approvals. The inverter-to-AC utility grid connection must be
made only by qualied technical personnel.
Wiring methods used should be in accordance with the National Electric Code,
ANSI/NFPA 70 and/or any prevailing local codes and regulations.
Output circuits must be isolated from the enclosure. System grounding, required
by Sections 690.41 - 690.43 of the National Electric Code, ANSI/NFPA 70, is the
responsibility of the installer.
The inverter should be connected only to a dedicated branch circuit. Models
that include AC output overcurrent protection (-S1B) are intended for equipment
disconnection and protection, not system disconnection. It is the responsibility of
the end user to provide PV system disconnection and protection for the AC output
circuit.
Connect only to a circuit provided with the maximum branch OCPD in accordance
with the CSA document available at www.abb.com/solarinverters and listed in the
technical data sheet of the appendix, section 7.
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