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60
Vin=380V
Vin=460V
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 110%120%
80%
85%
90%
95%
100%
(4) Input voltage - output - efficiency graph
(5) Block diagram
The block diagram for the PV inverter is shown below.
Grid 1ø2W 230V 50Hz
MCm
MCr
DC/AC
PV
String
Insulation resistance
check on PV side
PV inverter
OVR, UVR, OFR,
UFR
Independent
operation detection
(Change in
impedance detection)
DC flow detection
Earth fault detection
PV
String
Display
Control device
Shunt
resistance
MCm: Main relay
MCr: Grid connection relay
DC1: DC disconnector 1
DC2: DC disconnector 2
Earth fault
detection
CT
Conversion Ef
ficiency
Output power ratio
PV-S6000-IT
80%
85%
90%
95%
100%
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 110%120%
Vin=380V
Vin=330V
Vin=460V
Conversion Ef
ficiency
Output power ratio
PV-S4600-IT
80%
85%
90%
95%
100%
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 110%120%
Vin=380V
Vin=330V
Vin=460V
Conversion Ef
ficiency
Output power ratio
PV-S4200-IT
DC1
DC2