5
Electrical Connection
5.1
Grounding Concept
In accordance with the latest technology, the inverters are discharged to ground. As a result, leakage currents to
ground occur which must be taken into account when planning the system. The magnitude and distribution of such
leakage currents is influenced by the grounding concept of all devices in the system. It is recommend that optical fiber
technology is used for the transmission of signals, for example, when using cameras and monitoring equipment. This
will counteract possible interference sources.
The recommended grounding of inverter and MV transformer in meshed design reduces leakage current levels.
Grounding of the oil spill containment must be carried out during installation. The two grounding bolts located on the
left side of the oil spill containment can be used for this.
A
B
C
D
E
D
Figure 27: Grounding concept (example)
Position
Designation
A
Concrete foundation
B
MV Power Station
C
Oil spill containment
D
Grounding of the oil spill containment
E
Grounding of the MV Power Station
Double grounding of the MV Power Station
We recommend that the grounding concept provides for double grounding of the MV Power Station.
5.2
Cable Requirements
Terminal
Cable requirements
DC cable
• Connection with tin-plated aluminum or copper terminal lug
• Copper or aluminum cable
• Cable cross-section: 25 mm
2
to 400 mm
2
5 Electrical Connection
SMA Solar Technology AG
Transportation and Installation Requirements
MVPS22JP-TA-en-20
34
Summary of Contents for MEDIUM VOLTAGE POWER STATION 1000-1SC-JP
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