Delta PhotoVoltaic RPI-C500, Manual

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I
NSTALLATION
G
UIDE
78
A
PPENDIX
D
A.2 Each inverter require a separate isolated voltage winding . It is forbid to use
several inverters in parallel with one low voltage winding.
A.3 The MV transformer can be oil-type or dry-type .
A.4 It is suggested to have tap changer on the high voltage side to align the voltage
level to medium voltage.
A.5 Higher thermal stress of MV transformer should be taken country settings into
consideration, including the voltage and frequency.
A.6 The transformer is capable of withstanding of max 5% total harmonic current at
nominal power.
A.7 The transformer should be design according to the following inverter rating.
Model No
Nominal Voltage
Range
(Line-Line) (V)
Nominal Output
Current Range @ 50
℃
(A)
Maximum Output
Current (A)
RPI-C500 243~378 770~1180 1250
B. The inverter can be connected to MV transformer as following diagram.
Double winding transformer for one inverter
Three winding transformer for two inverters