SMA Sunny Tripower CORE1-US Instructions D'installation page 18

4 Product Overview SMA Solar Technology AG
SMA Sensor Module
The SMA Sensor Module has different interfaces for connecting various sensors (i.e. temperature
sensor, irradiation sensor, anemometer or energy meter). The SMA Sensor Module converts the
signals of the connected sensors and transmits them to the inverter. The SMA Sensor Module can
be retrofitted.
Grid Management Services
The inverter was tested in accordance with the UL 1741 SA (2016-09-07) to be compliant with the
source requirements documents of the states available at the time. For connecting the inverter to the
utility grid, no additional grid monitoring equipment is necessary. A description of the tested
functions and instructions on the activation and setting of functions can be found in the technical
information "Grid Support Utility Interactive Inverters" at www.SMA-Solar.com.
PV Rapid Shutdown Equipment
The inverter is listed as PV Rapid Shutdown Equipment (PVRSE) according to UL 1741.
All DC inputs and AC outputs of this product comply with photovoltaic rapid shutdown requirements
for controlled conductors outside the array.
A complete PV Rapid Shutdown System consists of the inverter, PV array disconnect switches, and a
Rapid Shutdown initiation device. The Rapid Shutdown initiation device serves to initiate a rapid
shutdown. The PV Rapid Shutdown System must limit the DC conductors to < 30 V within
30 seconds.
NOTICE - The inverter's Rapid Shutdown function is initiated by disconnecting the inverter from the
AC grid voltage, for example, by opening the main PV system AC disconnect. The AC disconnect
that serves as the Rapid Shutdown initiation device must be readily accessible and clearly marked
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in accordance with National Electrical Code . The Rapid Shutdown status of the PV system will be
indicated by the On/Off (Closed/Open) position of this AC disconnect. The Off (Open) position
indicates that a rapid shutdown has been initiated.
If PV array disconnect switches compliant with the SunSpec communication signal for Rapid
Shutdown systems are installed, the inverter can transmit a SunSpec-compliant "permission to
operate" signal to them via its DC input conductors. When a rapid shutdown is initiated, the inverter
will stop transmitting the SunSpec signal. When the SunSpec signal is not being received, the PV
array disconnect switches are responsible for reducing line voltages within the PV array in
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accordance with National Electrical Code
. In the event of a rapid shutdown via the SunSpec
communication signal, it is important that all PV modules connected to the inverter are always
equipped with SunSpec-compliant PV array disconnect switches, otherwise the inverter cannot start
feed-in operation. The sum of the standby voltages of all PV array disconnect switches of a string
must be < 30 V to ensure safe discharging of the DC lines. In addition, the recommended total
length of all DC lines of a string should not exceed 300 m (1000 ft). The total length defines the
length of the entire string wiring including the connection cable of the PV module switch in the string
(measured from the positive DC terminal to the negative DC terminal of the inverter).
A PV Rapid Shutdown system can also be installed using PV array disconnect switches initiated in
case of power failures or other means. In these cases, it must be ensured that the PV system Rapid
Shutdown initiation device initiates a rapid shutdown of the PV array devices at the same time that
the inverter is disconnected from grid voltage.
18 STP33-62-US-41-IA-xx-13 Installation Manual