SMC Networks 5000A Manual do Utilizador descarregar pdf (Página 36)

Electrical Connection SMA Technologie AG

Page 36 SMC50A_60A-IEN073320 Installation Guide

The diagram shows the respective curves for a grid voltage without mains supply.

A maximum possible feed-in power per phase (X axis) is obtained for the

respective curves depending on the grid impedance (Y axis).

The power read on the X axis is approximately 5.8 kW per phase.

Consequently, only one Sunny Mini Central may be installed per phase in this

example. A higher output per phase, without causing a disconnection because of

AC overvoltage, requires better connection conditions for the Sunny Mini Central

(e.g. a cable with a larger cross-section).

With three-phase connection and symmetrical feeding, the maximum possible

feed-in power per phase is approximately doubled.

Example:

- The grid voltage without mains supply is 230 V

- The grid impedance at the terminal is 1.0 Ohms

Output [kW] per phase

Grid impedance [Ohm]

1 2 ... 31 32 33 34 35 36 37 38 39 40 41 ... 95 96

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SMC Networks 5000A Manual do Utilizador Página 36