Fronius IG 15 - Manual (Page 61)

53
ENEN
Depending on the options installed in your FRONIUS IG unit, you have
the following alternatives to connect the solar inverter at the DC solar
modules and to the public AC mains:
1. Terminal block (connection within the housing)
2. DC plug (choice of up to 5 DC sockets, AC connection within the hou-
sing)
3. DC plug and AC plug connection (choice of up to 5 DC plug pairs, AC
plug connection)
4. FRONIUS IG Outdoors
The following chapters show the connection of the FRONIUS IG unit
separately for each one of the connection alternatives.
Connection
alternatives
- Fix the FRONIUS IG unit to the wall as shown in chapter „Installation“.
The housing is designed for a cable channel of up to 50 mm height which
can be located directly below the connection area, without
- cables visible below the FRONIUS IG unit
- impairing access to the connection area and the slot- in board area
Permissible cross-sections for AC and DC connection cables:
- cable without wire end ferrules: 6 mm² and 10 mm²
- cable with wire end ferrules: 6 mm²
Note! Tighten the screws of the terminal strip with 1.8 Nm.
1. Terminal
block
AC-side over-
current pro-
tection Important! We recommend the following for AC-side overcurrent protec-
tion:
- A separate 16 A fuse for each Fronius IG 15 and 30
- A separate 25 A fuse for each Fronius IG 40 and 60
- Alternative for Fronius IG 40 and 60: 32 A automatic circuit breaker,
type „C“
Note! A residual current circuit breaker for the AC connecting
cable may be required depending on local regulations, the power
supply company as well as other conditions. A type A residual
current circuit breaker is generally sufficient in this case. However,
false alarms can be triggered for the residual current circuit brea-
ker in individual cases and depending on local conditions.
For this reason, Fronius recommends that you use a residual
current circuit breaker suitable for a frequency converter.
The residual current circuit breaker for each individual inverter
must have a rated current of at least 30 mA.