Danfoss DLX 4.6 Guía de usuario descargar pdf (Pagina 17)

User Guide DLX Series L00410623-1 17

3.3.2.1. AC Fuses

• AC fuses protect the supply conductors between the inverter and the utility grid.

• AC fuses must be provided by the system installer.

• Recommended rating for the AC fuses is as per the local and national electrical

regulations.

Table 3.2: Suggested AC current characteristics and fuse rating

Inverter Model Max AC Current Fuse Ratings Tripping Characteristics Type

DLX 2.0

DLX 2.9

DLX 3.8

DLX 4.6

10.5 A

15.2 A

19.7 A

23.0 A

13 A

20 A

25 A

B or C

Double

Pole

3.3.3. Surge Protection Devices

Overvoltage protection is used to prevent voltage surges through sensitive equipment.

The DLX inverters are equipped with Temperature protected Metal Oxide Varistors (TMOV) on

both the DC and the AC side, which conduct excessive current from voltage surges to

ground.

• PV systems mounted in an open or exposed environment need added protection on

both the DC and AC side, as they can act as lightning rods.

• When the conductors are exposed to transients, their behavior limits the effectiveness of

a surge arrester. One or more surge arresters are needed in installations with long

conductors to obtain the required level of protection.

• Always use qualified assessment when selecting the appropriate kA ratings for the

overvoltage protection device!

• The DLX inverters are designed for category B: 100 kA – 150 kA per phase.

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Danfoss DLX 4.6 Guía de usuario Pagina 17