Operating Temperature - SMA SUNNY BOY 5000-US Installation Manual

Pv inverter

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Installation manual (108 pages)

Table Of Contents

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Table of Contents

SMA America, LLC

Arc Fault Circuit Interrupter AFCI

Only the following Sunny Boy types are equipped with an automatic arc fault circuit interrupter

(AFCI):

• SB 5000US-12

• SB 6000US-12

• SB 7000US-12

• SB 8000US-12

Edition 2011 of the National Electrical Code

to a building are fitted with a means of detecting and interrupting serial electric arcs (AFCI) on the PV

side.

An electric arc with a power of 300 W or greater must be interrupted by the AFCI in the time specified

by UL 1699B. A triggered AFCI may only be reset manually.

The arc fault circuit interrupter (AFCI) can be deactivated in the "Electrically qualified person" mode

via the communication device if this function is not desired.

Anti-Islanding Protection

A stand-alone grid is a status. It occurs when the power distribution grid is switched off and the Sunny

Boy is in operation. For this to happen, the remaining load must be resonant at 60 Hz and exactly

match the power of the Sunny Boy. Although the appearance of these conditions is extremely unlikely,

the Sunny Boy has an active safety algorithm to protect against islanding. The effect of this is that, in

the event of the power distribution grid being switched off, the PV plant does not supply any power

to a symmetrical load that is resonant at 60 Hz. In addition, the Sunny Boy regularly feeds leading

and lagging reactive currents into the power distribution grid. This procedure is checked by the

certification body in order to destabilize and switch off a stand-alone grid status.