Requirements For Ot/Dt Terminal; Connection Procedure - Sungrow SG30CX User Manual

5 Electrical Connection
The apparent power of the inverter should never exceed the power of the transform-
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er. The maximum AC current of all inverters connected in parallel must be taken into
account. If more than 30 inverters are connected to the grid, contact SUNGROW.
The transformer must be protected against overloading and short circuit.
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The transformer is an important part of grid-connected PV generation system. The
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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 environ-
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mental conditions into account when selecting and installing the transformer.

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.
Specification: M8;
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Dimensions: a≤30mm / 8.4mm≤b≤10.5mm / c≤16mm
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5.6.3 Connection Procedure

High voltage may be present in inverter!
Ensure all cables are voltage-free before electrical connection.
Do not connect the AC circuit breaker until all inverter electrical connections are
completed.
step 1 Disconnect the AC-side circuit breaker and prevent it from inadvertent reconnection.
step 2 Take out the AC junction box and loosen the swivel nut. Remove the seals and select an
appropriate one according to cable outer diameter. Lead the cable through the swivel
nut, seal, and junction box successively.
O O u u t t e e r r d d i i a a m m e e t t e e r r D D ( ( m m m m ) )
20~25
25~30
32
S S e e a a l l s s
a+b+c+d
a+b+c
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