SWITCHBOX FOR STRING INVERTER
Publication Date: 2015-Apr-23
The IP.com Prior Art Database
Massimo Garufi: AUTHOR [+2]
The new switchbox is dedicated to a string Inverter and it is done in plastic material. Regarding the connection it is used a DIN Rail connector for DC and AC side, while for the grounding it is used a metal bar.
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Switchbox for string inverter - structure and wiring harness
The new switch box is dedicated to a string Inverter and it is done in plastic material instead of metal part like the current one.
Regarding the connection it is used a DIN Rail connector for DC and AC side, while for the grounding it is used a metal bar: from a copper bar connected to external ground, two yellow-green cables go respectively to the bus-bar under terminals and DC switch and to the inverter.
In the following there is a short description of the connection through the wiring harness: First of all, DC input from the PV string can be connected to the input block. Then input harness passes through the Arc Fault detector (optional): watch out for the negative voltage cables routing. They make, indeed, a ring around the arc fault sensor.
From the Arc Fault module, a low power harness (dashed green cable) starts and goes to the logic; an EMI choke helps to increase noise immunity.
From the rotary switch DC harness starts and goes to power boards in the PVI.
From the PVI, AC output comes to the output terminal block, from which the AC output grid can be connected.
The whole terminal block is earth grounded by connecting its base-bar to the earth bar. Another earth cable goes to the chassis of the PVI.
An optional radio kit is available, including an antenna and the cable going from it, through a tie, to the radio-module board (optional) mounted on the PVI main board.
© ABB Group Apri...