ZGR SOLAR STR 250
Operation manual
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3)
Keep the wiring compartment opened during wiring through the limit lever attached to the cover (Fig.
4-26).
Fig. 4-26 Limit lever
4)
Close the wiring compartment in reverse order after completing wiring operations.
4.4.5
AC connection
Before connecting the inverter to the grid, ensure the grid voltage and frequency comply with requirements, for
which, refer to Technical Specifications on section 7. Otherwise, contact the electric power company for help.
4.4.5.1
AC Circuit Breaker
An independent three-pole circuit breaker is installed on the output side of the inverter to ensure safe
disconnection from the grid (Table 4-10).
INVERTER
RECOMMENDED RATED VOLTAGE RECOMMENDED RATED CURRENT
ZGR SOLAR STR 250
800 V
250 A
Table 4-10 AC specifications
If multiple inverters need to share a circuit breaker, the circuit breaker should be selected according to the
capacity.
4.4.5.2
Multiple Inverters in parallel Connection
If multiple inverters are connected in parallel to the grid, ensure that the total number of parallel inverters does not
exceed 28. Otherwise, please contact ZIGOR for technical scheme.
4.4.5.3
MV transformer
The MV transformer used together with the inverter should meet the following requirements:
WARNING
Connect the inverter to the grid only after getting an approval from the local electric power company.
NOTICE
Never connect a load between the inverter and the circuit breaker.
