ZGR SOLAR STR 250
Operation manual
www.zigor.com
6
2
GENERAL DESCRIPTION
Introduction
2.1
ZGR SOLAR STR 250
, a transformerless three-phase PV grid-connected inverter, is an integral component in the
PV power system.
The inverter is designed to convert the direct current power generated from the PV modules into grid-compatible
AC current and feeds the AC current to the utility grid (Fig. 2-1 and Table 2-1)
Fig. 2-1 Inverter application in PV power system
ITEM DESCRIPTION
NOTE
A
PV strings
Monocrystalline silicon, polycrystalline silicon and thin-
û
lm without grounding.
B
Inverter
ZGR SOLAR STR 250
C
Transformer
Boost the low voltage from inverter to grid-compatible medium voltage.
D
Utility grid
TN-C, TN-S, TN-C-S, TT, IT (Fig. 2-2)
Table 2-1 Inverter application in PV power system
Fig. 2-2 Connetions of the inverter to the utility grid
Make sure the inverter is applied to an IT system before enabling the Anti-PID function.
WARNING
Inverter cannot connect the PV strings whose positive and negative terminals need to be grounded.
Do not connect any local load between the inverter and the AC circuit breaker.
