Sungrow SG110CX - Requirements for OT;DT Terminal; Connection Procedure(for a Multi-Core Cable)

User Manual 5 Electrical Connection
• The transformer is an important part of grid-connected PV generation system. The fault
tolerance capacity of the transformer should be taken into account at all times. The fault
include: system short circuit, grounding fault, voltage drop, etc.
• Take ambient temperature, relative humidity, altitude, air quality, and other environmental
conditions into account when selecting and installing the transformer.
5.7.2 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: M12;
• Dimensions: a≤46 mm / 13 mm≤b≤15.5 mm / c≤22 mm
OT/DT Terminal of PE Wire
•
Specification: M8 / M10.
5.7.3 Connection Procedure(For a multi-core cable)
In this manual, description is given by using five-core cable as an example. The
wiring of the four-core cable is the same.
step 1 Open the wiring compartment. For details, refer to 5.6 Opening the Wiring Compartment.
step 2 Disconnect the AC-side circuit breaker and prevent it from inadvertent reconnection.
step 3
Loosen the swivel nut of the AC waterproof connector and select a seal according to the cable
outer diameter, remove the inner sealing ring if the cable diameter is larger than 47 mm. Lead the
cable through the swivel nut, seal, and wiring terminal successively.
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