Delta C1000 Operation And Installation Manual page 83

Appendix C: Delta MV Transformer and Auxiliary Power transformer Application Note
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.
Nominal Voltage
Model No
(Line-Line) (V)
C1000
B. The inverter can be connected to MV transformer as following diagram.
PV Array
Distribution
PV Array
Distribution
PV Array
Distribution
Range
Current Range @ 50°C (A)
350±10%
DC
Box
DC
Box
DC
Box
Nominal Output
1650
Transformer
3Ph
(3 Phase/PE)
Double winding transformer for one inverter
3Ph
Transformer
(3 Phase/PE)
3Ph
(3 Phase/PE)
Three winding transformer for two inverters
83
Maximum Output
Current (A)
1650
Public Grid
3 Phase
Public Grid
3 Phase