Information On Grounded Pv Plants; Reverse Voltage; Personnel; General Information - SMA SUNNY STRING-MONITOR Technical Description

Accessories for central inverter

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SMA Solar Technology AG

2.3.2 Information on Grounded PV Plants

The positive or negative pole of the PV array can be grounded within the Sunny Central via a GFDI

(Ground Fault Detection Interruption) fuse.

• Additional grounding within the PV array or floor-mounted distribution board is not permissible.

The grounding of the PV array can be automatically interrupted by the GFDI at any time.

• The GFDI ensures plant protection, but does not protect persons.

You will find additional information on grounded PV plants in the Sunny Central documentation and

in the download area of www.SMA.de/en.

2.3.3 Reverse Voltage

On the main DC cables in the Sunny String-Monitor there is a permanent reverse voltage present of

up to 1000 V

of the Sunny Central. When the power is off, the reverse voltage can be interrupted

by pulling the DC fuses in the Sunny Central.

2.4 Personnel

Only qualified technical personnel may perform work on the Sunny String-Monitor. Qualified means

that the personnel must possess training relevant to the activity performed and must be familiar with

the content of this manual.

2.5 General Information

Communication between Sunny String-Monitor and Sunny Central

Alongside the Sunny String-Monitor SSM one can also install the Sunny String-Monitor SSM16-11 as

well as the Sunny String-Monitor SSM24-11 for string monitoring These have various numbers of

Piggy-Backs for data processing.

Maximum number of Piggy-Backs for data processing

There are two communications connections in each Sunny Central, to which up to 10

Piggy-Backs each can be connected. The number of Piggy-Backs for data processing is

thus determined by the combination possibilities between the Sunny String-Monitor SSM,

Sunny String-Monitor SSM16-11 and Sunny String-Monitor SSM24-11. The following

summary shows the number of Piggy-Backs for data processing in the various Sunny

String-Monitor:

• Sunny String-Monitor SSM: 1 Piggy-Back for data processing.

• Sunny String-Monitor SSM16-11: 2 Piggy-Backs for data processing.

• Sunny String-Monitor SSM24-11: 3 Piggy-Backs for data processing.

Technical Description

2 Safety

SSM-TEN103132

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