
Fronius Primo 5.0-1 / AUS
Fronius Symo 3.0-3-S / -M
Fronius Symo 3.7-3-S / -M
Fronius Symo 4.5-3-S / -M
Wels, 28th of October 2015
MAXIMUM FUSE RATING AC SIDE
Fronius International GmbH
hereby confirms the maximum fuse rating on alternative current (AC) side for the following inverters:
02/2011 1/2

Additional note for Fronius Galvo and Fronius Primo inverters:
Local regulations, the energy supply company or other factors may
require a residual current protective device (RCD) in the grid line.
For this situation, a type A residual current protective device is
generally adequate.
In particular cases, and depending on local factors, however, the
type A residual current protective device may trip at the wrong time.
For this reason, Fronius recommends that a residual current
protection device RCD suitable for frequency converters be used.
Additional note for Fronius Symo, Fronius Symo Hybrid and Fronius Eco inverters:
Local regulations, the energy supply company or other factors
may require an earth-leakage circuit breaker in the grid line.
For this situation, a type A earth-leakage circuit breaker with a
tripping current of at least 100 mA is generally adequate.
In particular cases, and depending on local factors, however, the
type A earth-leakage circuit breaker may trip at the wrong time.
For this reason, Fronius recommends that an earth-leakage circuit
breaker that is suitable for frequency converters should be used.
Fronius International GmbH
Solar Energy Division
Froniusplatz 1
A-4600 Wels
DI Thomas Mühlberger
Head of Solution Management
02/2011 2/2