String PV Grid-tied Inverter SPI-B-H Series (175K-250K)
User Manual
3Installation
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Ltd.
35
Each inverter is equipped with an independent four-pole circuit breaker on the AC side to ensure that
the inverter is safely disconnected from the power grid. Recommended circuit breaker rated voltage
is 800V, rated current is 250A.
If multiple inverters need to share a circuit breaker, they need to be selected according to the total
current.
No load can be connected between the inverter and the circuit breaker.
Terminal requirements
When the AC output uses copper wire, it is recommended to use DT/OT terminals (as shown in
Figure3-29) for the terminal block. The terminal specifications and requirements: 13mm
≤
A
≤
15.5mm
，
B
≤
46mm
，
C
≤
22mm.
Figure3-29
Terminal size requirements
When aluminum wire is used for AC output, copper-aluminum transition terminal is required for
the terminal to avoid direct contact between the copper bar and the aluminum wire.
Wiring steps
Step 1
Open the cover of the right-side wiring box with an internal torx wrench, as shown in Figure3-30.
Summary of Contents for SPI-B-H Series SPI175K-B-H
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