· Grid protection
The grid protection is a powerful relay which ensures reliable grid disconnection in the case of error and for night switch- off. This relay fulfils the requirement for
· Microcontroller
As well as system management, the efficient microcontroller undertakes additional tasks, such as saving data and communication.
· LCD display
Important information for the operator about the system operation and status is displayed on an LCD display of 2 x 16 characters.
· RS 485 and RS 232 interfaces
The two RS 485 and RS 232 interfaces installed as standard serve for communi- cation with the solar inverter and the PV system. The system can be visualised via the Sunways NT Monitor software.
· Sensor interface
An irradiation sensor with integrated temperature sensor can be optionally con- nected to the relevant interface. This allows first time users to quickly grasp the mode of functioning of their PV system, and facilitates monitoring of the PV system for professionals.
·AFI universal sensitive residual current device
The universal (DC and AC) sensitive residu- al current device (AFI) monitors the solar system for residual currents. To do this,
it disconnects the solar inverter from the grid by means of a relay as soon as a resi- dual current occurs on the PV generator side or on the AC side in the solar inverter. After cutoff by the relay and as soon as the residual current has stopped, the AFI automatically attempts to reconnect the solar inverter to the grid. The AFI of the Sunways solar inverter complies with standard DIN V VDE V
In addition, the AFI of Solar Inverters NT 2600, NT 4000 and NT 6000 has an absolu- tely
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