Product Overview; Product Description - SMA GRID-CONNECT-BOX 12 Instrucciones De Funcionamiento

4 Product Overview

4 Product Overview
4.1

Product Description

The Grid-Connect-Box is an automatic transfer switch which enables the safe operation of the utility grid and an
electricity generator as energy sources of an SMA multicluster-system.
A
Figure 2 : Grid-Connect-Box with cabinet door open
Position
A
B
C
D
10 GRID-BOX-12-3-20-BE-xx-12
B C
Designation
Protective cover
Prevents inadvertent contact with live components during operation and thus protects
from electric shocks. When the product is in operation, the protective covers must al-
ways be mounted.
Type label
The type label clearly identifies the product. The type label must remain permanently at-
tached to the product. You will find the following information on the type label:
• Device type (Model)
• Serial number (Serial No. or S/N)
• Date of manufacture
• Device-specific characteristics
Fuse holder 1 A
Used as receptacles for cylindrical thermal fuses (1 A, tripping characteristic gG). The
thermal fuses protect the connected conductors from excessive heat build-up due to
overload or short circuits.
Residual-current device
Protects against electric shock and is always used in addition to existing protective
measures such as insulation or protective grounding. As soon as a dangerous touch
voltage occurs, the residual-current device switches the loads off at all poles. This is
achieved by means of a summation current transformer in the residual-current device
which detects the electric currents in the conductors L1, L2, L3, and N. In the normal
operating state, the sum of these currents equals zero. Under fault conditions a differen-
tial current is formed which trips the residual-current device.
The residual-current device has a test button and a switch lever. The test button is used
to test the residual-current device. The switch is used to activate and deactivate (see
Section 10.1, page 27).
SMA Solar Technology AG
D D
Operating manual