STOBER
10 | Connection
02/2019 | ID 442728.05
105
10.3.3
UL-compliant line fuse
Use the supply module with power to ensure UL-compliant use; permitted for supply grids with a
differential short-circuit current up to 5000 A, max. 480 V
AC
with one of the following fuses:
§
Class CC, CF, J, T, G or RK1 fuses
§
Circuit breakers
The appropriate fuses can be taken from the following table:
Size
Type
Safety fuse
Circuit breakers
I
N
[A]
U
N
[V
AC
]
2
PS6A24
30
600
EATON
NZMB1-AF30-NA
Manufacturer No. 281556
3
PS6A34
60
600
EATON
NZMB1-AF60-NA
Manufacturer No. 272208
Tab. 83: UL-compliant line fuse
10.3.4
Grid connection
The grid must be switched on at all supply modules simultaneously. Simultaneously in this case
means that the time difference may be a maximum of 20 ms. This condition is generally met if
you use contactors of identical design from one manufacturer.
Provided that the grid connection is made simultaneously, a design with a contactor for each
supply module is permitted.
ATTENTION!
Damage due to overload!
If the network does not connect to all modules simultaneously in a design with a contactor for
each supply module, their charging resistors can be damaged.
10.3.5
Residual current protective device
STOBER devices can be protected with a residual current protective device (RCD) to detect
residual currents. Residual current protective devices prevent electrical accidents, especially
ground fault through the body. They are generally classified by their triggering limit and
suitability for detecting different types of residual currents.
Depending on the function, leakage currents may occur when operating drive controllers.
Leakage currents are interpreted as residual currents by residual current protective devices and
may therefore lead to false triggering. Depending on the relevant power supply connections,
residual currents may occur with or without a DC current component. Because of this, you
should take into consideration both the magnitude as well as the profile of the possible leakage
or residual current when selecting a suitable RCD.