Omron KP100L-OD - 12-2010, User Manual

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2 Design
Grid Connect Photovoltaic Inverte KP100L-OD-  USER’S MANUAL
2-2 Ap
plic
ation
inform
ation
2
2-2 Application information
 DC side
DC switch / breaker
DC switch / circuit breaker is an obligatory prerequisite stipulated by DIN VDE 0100-712, the installation standard
for PV systems in Germany. For safety point of view during working on an electrical device, it is necessary to
disconnect from the energy supply. DC circuit breaker between the PV modules and the inverter is used. Select
DC circuit breaker with rate current is larger than designed PV short circuit current on each DC input.
SPD (Surge Protective Device) in DC side
SPD (Surge protective device) is used to protect the inverter against lightening surge voltage.
 AC Grid side
AC breaker
For protection of AC over current, use a 20 A trip breaker with B or C or D trip characteristics.
If you use the transformer, install the breaker between the transformer and the KP100L as shown in the figure
below.
Example of SPD
• Class II
• PV voltage 1000 VDC
• Nominal discharge current (8/20us) I
n
:20 kA
• Maximum discharge current (8/20us)I
max
:40 kA
• Protection revel: 4 kV
This is just example. Contact company of
protection device for selection.
SPD on each input
Grid
N
3P
3P+N
Breaker Breaker