SMA SC 500CP-10-JP Installation Manual - Manual (Page 16)

3 Product Description SMA Solar Technology AG
16 SCCP-JP-IA-A4-en-12 Installation Manual
3.4 External Fast Stop
The Sunny Central is equipped ex works with a fast stop input. An external switch that is switched via a 24 V signal can
be connected to this fast stop input.
The external fast stop disconnects the Sunny Central from the utility grid in less than 100 ms.
The Sunny Central is delivered ex works with open terminals. The following options are available for configuring the
external fast stop:
• The external fast stop is deactivated.
The terminals of the active fast stop are bridged. The fast stop function is thus deactivated. You will need to bridge
the terminals if required.
• The external fast stop is operated with internal 24 V supply.
An external latching switch (break contact) is connected to the Sunny Central terminals via the internal supply
voltage in the Sunny Central. When the switch is closed, the all-or-nothing relay is activated and the Sunny Central
feeds into the grid. If the fast stop is tripped, the switch opens and the relay is deactivated. The Sunny Central is
stopped and no longer feeds energy into the grid.
• The external fast stop is operated via an external 24 V supply.
An external latching switch (break contact) is connected to the Sunny Central terminals via an external 24 V voltage
supply. When the switch is closed, the all-or-nothing relay is activated and the Sunny Central feeds into the grid.
If the fast stop is tripped, the switch opens and the relay is deactivated. The Sunny Central is stopped and no longer
feeds energy into the grid.
3.5 Grounding Concept
In accordance with the latest technology, the Sunny Central inverters are discharged to ground. As a result, leakage
currents to ground occur which must be taken into account when planning the PV system. The magnitude and distribution
of such leakage currents is influenced by the grounding concept of all the devices in the PV system. SMA Solar
Technology AG therefore recommends that when using e.g. cameras and monitoring technology, optical fiber technology
is used for the transmission of signals (see Section 13.2.2 "Setting up a System Network with Optical Fibers", page 67).
This will counteract possible interference sources.
The grounding of the Sunny Central and MV transformers in meshed design as recommended by SMA Solar Technology
AG reduces the level of leakage current.
3.6 Schematic Diagram
Schematic diagrams in PDF format contain jump marks. By double clicking a jump mark, the display will change to the
corresponding current path or the referenced place in the equipment list.
SMA Solar Technology AG recommends using schematic diagrams in PDF format during installation. The schematic
diagrams in PDF format are available on request. Contact the SMA Service Line.
Tripping of the fast stop function
The fast stop function should only be tripped in case of imminent danger. The tripping of the fast stop does not entail
rapid discharge of the capacitors. If you wish to use an external signal to switch the Sunny Central off in a controlled
manner, you should use the input of the remote shutdown function.