Requirements For Ot/Dt Terminal; Connection Procedure - Sungrow SG25CX-P2 User Manual

5 Electrical Connection
Residual Current Monitoring Device
With an integrated universal current-sensitive residual current monitoring unit included, the
inverter will disconnect immediately from the mains power once a fault current with a value
exceeding the limit is detected.
However if an external residual current device (RCD) (type A is recommended) is mandatory,
the switch must be triggered at the residual current. RCD of other specifications can also be
used according to local standard. The recommended residual current is as follows.
Inverter
SG25CX-P2
SG30CX-P2
SG33CX-P2
SG36CX-P2
SG40CX-P2
SG50CX-P2
Multiple Inverters in Parallel Connection
If multiple inverters are connected in parallel to the grid, ensure that the total number of par-
allel inverters does not exceed 30. A maximum of 13 inverters can be connected in parallel if
the PV module is equipped with optimizers. If SUNGROW Logger1000 is applied, please
note that a maximum of 3500 optimizers can be connected.

5.6.2 Requirements for OT/DT Terminal

OT / DT terminals (not included in the delivery scope) are required for fixing AC cables to
the terminal block. Purchase the OT / DT terminals according to the following requirements.
OT / DT Terminals of Phase Wire
• Specification: M8
OT / DT Terminal of PE Wire
• Specification: M8

5.6.3 Connection Procedure

Step 1 Disconnect the AC-side circuit breaker and prevent it from inadvertent reconnection.
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Recommended Residual Current
300 mA
300 mA
330 mA
360 mA
400 mA
500 mA
figure 5-3 Specifications of the Crimped OT/DT Terminal
User Manual