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• The transformer must be protected against overloading and short circuit.
• The transformer is an important part of a grid-connected PV generation system. The
faults tolerance capacity of the transformer should be taken into account at all times.
The faults 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.
5.5.2 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.
• Specification: M8;
• Dimensions: a≤30mm / 8.4mm≤b≤10.5mm / c≤16mm
FFiigguurree 55--22 Dimensions of Terminal
5.5.3 Aluminium Cable Requirements
If an aluminium cable is selected, use a copper to aluminium adapter terminal to avoid
direct contact between the copper bar and the aluminium cable.
FFiigguurree 55--33 Aluminium cable terminal connection sequence
Ensure that the selected terminal can directly contact with the copper bar. If
there are any problems, contact the manufacturer of terminal.
Direct contact between the copper bar and the aluminium cable will cause
electrochemical corrosion and impair the reliability of electrical connection.
User Manual 5 Electrical Connection
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