Fronius Symo 10-20 kW User Manual download pdf (Page 11)

Notes regarding grid connection

Monitoring the

Grid

AC terminals

PE Ground conductor / grounding

L1-L3 Phase conductor

N Neutral conductor

Max. cross-section of each conductor ca-

ble:

16 mm²

Min. cross-section of each conductor cable:

in accordance with the fuse rating on the

AC side, but at least 2.5 mm²

The AC cables can be connected to the AC

terminals without ferrules.

Type of AC cable The following types of AC cable can be connected to the AC terminals of the inverter:

Connecting alu-

minum cables

The AC-side terminals are designed for connecting single-wire, round, aluminum cables.

The following points must be taken into account when connecting aluminum cables due to

the non-conducting oxide layer of aluminum:

- Reduced rated currents for aluminum cables

- The connection requirements listed below

Connection Requirements:

Carefully clean off the oxide layer of the stripped end of the cable, e.g., using a knife.

IMPORTANTDo not use brushes, files or sandpaper. Aluminum particles may get stuck

and can transfer to other cables.

After removing the oxide layer of the cable end, rub in a neutral grease, e.g., acid- and

alkali-free Vaseline.

Then immediately connect it to the terminal.

Repeat the steps above whenever the cable is disconnected and then reconnected.

IMPORTANT! The resistance in the leads to the AC-side connection terminals must be as

low as possible for optimal functioning of grid monitoring.

PE N

M32

- copper or aluminium: round, single wire

- Copper: round, finely stranded up to conductor category 4

Cu / Al Cu

max. Class 4

NOTE! Take into account local specifications when configuring cable cross sec-

tions.

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Fronius Symo 10-20 kW User Manual Page 11