INSTALLATION, USE AND
MAINTENANCE
SUNWAY STRING BOX
LT 1500V 24 INPUTS
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Warning
The cable glands must be correctly tightened once the cable has been inserted.
Cable glands which are not used must be plugged. The gable glands and
covers must be accurately tightened to prevent water, insects or small animals
from getting inside and causing plant malfunctions as well as fire risks.
Make sure that water, condensation, insects or small animals cannot get inside
cable tubing, thus avoiding plant malfunctions as well as fire risks.
Warning
Prevent the cable connected to the string box from being mechanically
stressed. It is sometimes necessary to provide special anchoring for the output
cable. Cable anchoring is particularly required for cable cross-sections over
240mm2 and when the free cable length exceeds 100cm.
7.3. Connecting the strings
The connection of the cables to the panels must be made with the shortest possible route in order to
minimize the resistive cable drop and therefore the system losses.
The STRING BOX LT 1500V provides cable glands to guarantee the IP65 degree of protection once the
cables coming from the panels are connected.
Danger
The internal DC switch disconnector must be open.
No fuse must be inserted.
Always wear PPE with a minimum rating of 2000 VDC.
Check polarity of each string before connecting them.
DO NOT CONNECT THE STRINGS IN CASE OF POLARITY MISMATCH.
Up to 24 strings may be connected to SUNWAY STRING BOX LT 24 INPUTS.
The drawing below shows the box inside. The string inputs are highlighted.
