PV modules Capacitive Discharge Currents
PV modules with large capacities relative to earth, such as thin-film PV modules with
cells on a metallic substrate, may only be used if their coupling capacity does not
exceed 470nF. During feed-in operation, a leakage current flows from the cells to
earth, the size of which depends on the manner in which the PV modules are installed
(e.g. foil on metal roof) and on the weather (rain, snow). This "normal" leakage
current may not exceed 50mA due to the fact that the inverter would otherwise
automatically disconnect from the electricity grid as a protective measure.
If PV modules of the PV system require POSITIVE or
NEGATIVE to connect to GROUND, or the
capacitance relative to ground of the modules is
large, please contact Growatt New Energy for
technical support before installation.
2.2 Safety Precautions
The GROWATT TL3 series Inverters is designed and tested according to international
safety requirements; 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. If questions arise, please contact Growatt’s
technical services at +86 755 2747 1900.
2.3 Assembly Warnings
>
absence of any transport or handling damage, which
could affect insulation integrity or safety clearances;
failure to do so could result in safety hazards.
> Unauthorized removal of necessary protections,
improper use, incorrect installation and operation may
lead to serious safety, shock hazards or equipment
damage.
> In order to minimize the potential of a shock hazard
due to hazardous voltages, cover the entire solar array
with dark material prior to connecting the array to any
equipment.
Prior to installation, inspect the unit to ensure
>
requirements for grounding the PV modules and the
PV generator.
> Growatt recommends connecting the generator
frame and other electrically conductive surfaces in a
manner which ensures continuous conduction and
ground these in order to have optimal protection of
the system and personnel.
Grounding the PV modules: Comply with the local
2.4 Electrical Connection Warnings
>
live components can result in serious injury or death.
> Danger to life due to high voltages in the inverter
·
All work on the inverter may be carried out by
qualified personnel only.
·
The appliance is not to be used by children or
persons with reduced physical, sensory or mental
capabilities, or lack of experience and knowledge,
unless they have been given supervision or instruction.
> Children are forbidden to play around the Growatt
inverter.
Some components in the inverter are live. Touching
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