4 Product Overview
SMA Solar Technology AG
Operating manual
NA-BOX-12-3-20-BE-en-12
12
Position
Designation
E
Test button for the tie switch
The tripping mechanism of the tie switch must be tested regularly for correct operation
(see Section 10.3, page 30).
F
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.
4.2
Symbols on the Product
Symbol
Explanation
Beware of electrical voltage
The product operates at high voltages.
Beware of hot surface
The product can get hot during operation.
Observe the documentation
Observe all documentation supplied with the product.
Grounding conductor
This symbol indicates the position for connecting a grounding conductor.
WEEE designation
Do not dispose of the product together with the household waste but in accordance with the
disposal regulations for electronic waste applicable at the installation site.
Degree of protection IP55
The product is protected against interior dust deposits and water that is directed as a jet
against the enclosure from all directions.
CE marking
The product complies with the requirements of the applicable EU directives.
