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Site Preparation – Operating Environment
AIS® 3000 10-40kVA, 400V, Site Preparation and Installation Manual – 990-2258 21
Recommended current protection
Note 1:
If the available fault current of the installation is below 30kA, a lower Icu-rated breaker can be used.
Note 2:
For breaker settings, refer to below tables listing available overload currents.
Note 3:
Maximum rating of a single fuse configuration if the internal bypass must be protected during a load
short circuit. Selectivity is not ensured by the configuration.
AC output over-current protection and AC output disconnect must be provided by the
customer.
Dual/
single
mains
configu-
ration
Connec-
tion
10kVA 15kVA 20kVA 30kVA 40kVA Notes
Dual Mains
input
20A
breaker
(30kA)
35A
breaker
(30kA)
50A
breaker
(30kA)
63A
breaker
(30kA)
80A
breaker
(30kA)
1+2
Dual Bypass
input
20A
breaker
(30kAIC)
35A
breaker
(30kA)
50A
breaker
(30kA)
63A
breaker
(30kA)
80A
breaker
(30kA)
1+2
Single Mains/
Bypass
input
20A
breaker
(30kA)
35A
breaker
(30kA)
50A
breaker
(30kA)
63A
breaker
(30kA)
80A
breaker
(30kA)
1+2
Any Output 20A
Class
gL (gG)
fuse
35A
Class
gL (gG)
fuse
50A
Class
gL (gG)
fuse
63A
Class
gL (gG)
fuse
80A
Class gL
(gG) fuse
3