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Introduction
2 Introduction
The transformerless 3Ø PV inverter is designed to enable the highest levels of
efficiency and provide longest operating life by use of state-of-the-art high
frequency and low EMI switchmode technology. It is suitable for outdoor use.
- This product utilizes a transformerless design, and is not provisioned with an
isolation transformer, and therefore has no galvanic isolation between the DC
and AC sides.
PV array circuits connected must be floating with respect to ground, i.e., must
not be referenced (bonded) to ground.
If grounded PV arrays are connected to the inverter, the inverter will not connect
to the grid and the error message INSULATION (E34) will appear.
- It is prohibited to connect terminals L1, L2, L3 or N to ground.
2.1 Valid Model
The user manual is valid for the following device types:
• M70A
_260
• M50A
_260
• M50A
_261
• M50A
_240
This user manual must be followed during installation, operation, and maintenance.
Delta reserves the right to make modifications to the content and technical data
in this user manual without prior notice.
ATTENTION : NO GALVANIC ISOLATION
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