Fronius SYMO Series Installation Instructions

26
Preparing Alumi-
num Cables for
Connection
The AC-side terminals are designed for connecting single-wire, round aluminum cables.
Due to the reaction of aluminum with air that creates a tough, non-conductive oxide layer
the following points must be considered when connecting aluminum cables:
- Reduced rated currents for aluminum cables
- The connection requirements listed below
Always follow the instructions of the cable manufacturer when using aluminum cables.
Take into account local specifications when configuring cable cross sections.
Connection Requirements:
Carefully clean off the oxide layer of the stripped end of the cable, e.g., using a knife
10
2)
10
2)
10/10
2)
10/12
2)
10/14
2)
10/10
2)
10/12
2)
10/14
2)
10/16
5)
12
2)
12
2)
12/10
2)
12/12
2)
12/14
2)
12/10
2)
12/12
2)
12/14
2)
12/16
2)
14
2)
14
2)
14/10
2)
14/12
2)
14/14
2)
14/16
2)
14/10
2)
14/12
2)
14/14
2)
14/16
2)
16
5)
16
5)
16/14
2)
16/16
2)
16/10
5)
16/12
2)
16/14
2)
16/16
2)
AC & DC = aluminum cables (Al)
The following wire combinations can be used for wiring.
Select a sufficiently large cable cross-section based on the actual device output!
AWG
round
AWG
strand
ed
AWG
stranded/round
AWG
round/round
AWG
stranded/stranded
1)
tested and inspected as per UL
2)
not inspected as per UL; connection possible
3)
with ferrules only
4)
use stranded PV (ZKLA) or 2-wire
5)
not inspected as per UL; connection possible; AWG 16 with ferrules only
Minimum AWG as per NEC
10.0-3 208-240 12.0-3 208-240 15.0-3 208
Copper (Cu)/aluminum (Al)
208 V
AC
AWG 10/AWG 10 AWG 10/AWG 8 AWG 8/AWG 6
220 V
AC
AWG 10/AWG 10 AWG 10/AWG 8
240 V
AC
AWG 12/AWG 10 AWG 10/AWG 10
10.0-3 480 12.5-3 480 15.0-3 480
Copper (Cu)/aluminum (Al)
440 V
AC
AWG 14/AWG 12 AWG 14/AWG 12 AWG 14/AWG 12
480 V
AC
AWG 14/AWG 12 AWG 14/AWG 12 AWG 14/AWG 12
17.5-3 480 20.0-3 480 22.7-3 480
Copper (Cu)/aluminum (Al)
440 V
AC
AWG 12/AWG 10 AWG 10/AWG 10 AWG 10/AWG 8
480 V
AC
AWG 14/AWG 12 AWG 12/AWG 10 AWG 10/AWG 10
24.0-3 480
Copper (Cu)/aluminum (Al) 480 V
AC
AWG 10/AWG 10
1

Fronius SYMO Series Specifications

General

MPPT Number	2
Frequency Range	50 / 60 Hz
Operating Temperature Range	-25°C to +60°C
Communication	WiFi, Ethernet, RS485
AC Nominal Voltage	3 x 230 V / 400 V
Output Voltage	3 x 230 V / 400 V
Warranty	5 years