INSTALLATION, USE AND
MAINTENANCE
SUNWAY STRING BOX
LT 1500V 24 INPUTS
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2.8. Safety Procedure
Always place the equipment in safety conditions before carrying out any kind of operation inside the box
involving removing the polycarbonate protective panels providing IP20 degree of protection with respect to
live parts, even when the box front cover is open. To do this, follow the instructions provided below:
•
Make sure that the inverter connected to the SUNWAY STRING BOX LT 1500V is not running, i.e. that
it is STOPPED.
•
Open the inverter DC-side switch disconnector.
•
Open the disconnector, if present, of all the string boxes connected to the same inverter.
•
Open the cover of the SUNWAY STRING BOX LT 1500V and open the switch disconnector (there is NO
need to remove the polycarbonate safety panel).
•
Open all fuses.
•
Remove the polycarbonate protective cover and use a multimeter to check that voltage is not present
between the output bars polarities, among the poles and the earth.
•
Proceed with the operation in question.
Danger
ELECTRIC SHOCK HAZARD
High voltage on string cables and output cables.
2.8.1. Polycarbonate Protective Panels
The SUNWAY STRING BOX LT 1500V is fitted with an internal polycarbonate protective panel. Live parts
which are most exposed to possible inadvertent contact are protected by this panel made of polycarbonate,
a transparent, break-proof material which is resistant to high temperatures. Once the front door has been
opened, the panel makes it possible to carry out the following operations in relative safety:
•
visually inspect the box inside in relative safety:
•
turning the DC switch ON or OFF;
•
replace string fuses;
•
measure string voltages.
Only during installation must be removed the cover panel of the output terminals following the instructions
given in the paragraph 7.2.
Prohibition
It is not necessary to remove the internal panel when commissioning and
maintaining the product. .
Figure 4: Position of the measurement points and of the screws to remove the polycarbonate cover panel of output
terminals
