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2 Product Introduction
2.1 Intended Usage
SG10KTL, SG12KTL, SG15KTL and SG20KTL (They will be referred to as inverter
hereinafter unless otherwise specified), which are 3-phase string inverters without
transformer, are crucial units between the PV strings and utility grid in the
small-scaled PV power system.
Inverter is dedicated to converting direct current power generated by the PV
modules into alternating current, which conforms to parameters of local utility grid,
and feeds the alternating current into the utility grid. The intended usage of the
inverter is illustrated in Fig. 2-1.
Inverter CANNOT be connected to the PV modules, the positive or negative
terminal of which needs to be grounded.
Fig. 2-1 Application of the inverter of the PV Power System
Item Description Note
A PV strings
monocrystalline silicon; polycrystalline silicon and thin-film
without grounding
B Inverter SG10KTL, SG12KTL ,SG15KTL or SG20KTL involved
C
Metering
device
meter cupboard with power distribution system
D Utility grid TT, TN-C, TN-S, TN-C-S
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