INSTALLATION, USE AND
MAINTENANCE
SUNWAY STRING BOX
LT 1500V 24 INPUTS
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Figure 13: Bottom side view and inside view with string inputs highlighted
Connections
Function
A
Cable glands of string positive pole
B
Cable glands of string negative pole
C
Negative pole fuses, strings 1-24 (numbering of fuseholders
may vary depending on model, please refere to final product
drawings).
D
Positive pole fuses, strings 1-24 (numbering of fuseholders
may vary depending on model, please refere to final product
drawings).
Table 4 Key to string connections
The string connections are to be made when the string box is in safe conditions:
•
DC switch disconnector open
•
Fuse-holders open
•
There is a dangerous voltage up to 1500V on the string cables when they are connected to PV panels
exposed to the sunlight. Check there is no voltage and in any case wear dielectric gloves. Touching
cables with live voltage causes death or serious injury.
Cables from string must be routed through the cable glands on the bottom panel and connected directly
onto the fuse-holders.
Connect the string cables as follows:
•
Connect cable strings:
o
Loosen the cable gland
o
Route the cable through the cable gland
o
Connect the cable to the fuse-holder
