Description of Device | Features of SelectSun 40K
Doc. No. 982056, Version 01, SelectSun 40K
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The 5-wire power supply line must be equipped with an appropriate AC disconnecting device.
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The 40K is not equipped with internal potential isolation.
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If the 40K is connected with the medium-voltage-grid, it must be operated with electrically isolating
transformers.
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No other equipment may be connected between the transformer and inverters.
The following standards and technical regulations are also to be observed:
IEC 60364-4-41
Protection: Protection against electric shock
IEC 60364-4-43
Protection for safety - Protection against overcurrent
IEC 60364-5-52
Selection and erection of electrical equipment - wiring systems
BDEW
Technical Guidelines
VDN
Technical Guidelines
For the SelectSun 40K an isolating transformer with the following specifications is required:
Specification of medium voltage transformers
40K
Rated power
40 kVA
Rated voltage OS
Depends on grid connection point
Rated voltage US
3 x 400 V PE + N
Frequency
50/60 Hz
Short-circuit voltage uk
Depends on grid connection point
Switching group
Dyn5 or Dyn11
3.3
Features of SelectSun 40K
The SelectSun 40K inverter is a transformer-less, three-phase solar inverter, which has a particularly high
efficiency at any operating point.
Heat is dissipated only by convection. The internal temperature control prevents the device from exceeding
the permissible ambient temperature.
The inverter is designed such that the device does not have to be opened for assembly and connection
work. The inverter provides communication interfaces for RS485 and Ethernet. The communication protocol
is Modbus and Sunspec compliant.
An illuminated graphical display shows the development of the feed-in power and other operating data in a
clearly arranged manner. An 8-key control panel below the display also provides excellent control and
navigation convenience. Based on its design in protection class IP 65, the inverter can be installed at almost
any outside location. The inverter has extensive safety and security features. For details, refer to Technical
Data.