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2. Safety Instructions
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CanadianSolar
2.4 Protection Circuitry and Controls
To meet relevant codes and standards, the Canadian Solar three phase inverter line is
equipped with protective circuitry and controls. These include Arc Fault Circuit Interrupter
(AFCI) and Anti-Islanding Protection.
Arc Fault Circuit Interrupter AFCI:
Edition 2011 of the National Electrical Code®, Section 690.11, requires that all PV plants
attached to a building are fitted with a means of detecting and interrupting serial electric
arcs in the PV wiring and array. An electric arc with a power of 300W or greater must be
interrupted by the AFCI in the time specified by UL 16998. A triggered AFCI fault may only
be reset manually. After clearing the source of the fault, theAFCI can be deactivated via
the inverter front panel interface.
Anti-Islanding Protection:
. 10.
Islanding is a condition where the inverter continues to produce power even when the grid
is not present. Circuitry, along with firmware, has been designed to determine if the grid is
present by adjusting the output frequency of the inverter. In the case of a 60Hz resonant
system where the inverter is partially isolated from the grid, the inverter programming can
detect if there is a resonant condition or if the gird is actually present. It can also
differentiate between inverters operating in parallel and the grid.
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CanadianSolar
3. Installation
3.1 Environmental considerations
3.1.1 Select a location for the inverter
When selecting a location for the inverter, consider the following:
• The temperature of the inverter heat-sink can reach 167°F (75C).
• The inverter is designed to work in an ambient temperature range between -13•F to 140•F
(-26-60C).
• If multiple inverters are installed on site, a minimum clearance of 20 inches should be kept between
each inverter and all other mounted equipment. The bottom of the inverter should be at least 20
inches above of the ground or floor (see Figure 3.1 ).
• The LED status indicator lights and the LCD located on the inverter's front panel should not be
blocked.
• Adequate ventilation must be present if the inverter is to be installed in a confined space.
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20in
20in
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Figure 3.1 -Distances required between inverters
NOTE
Nothing should be stored on or placed against the inverter .
.11.
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