High voltage cylindrical fuse-link
max. 13.8 kV, I EC 549, IEE C37.48b | HHA
SIBA
tailored to the requirements of the US market. HHA-BC fuses have
been specially designed to protect capacitor circuits indoors
and outdoors, thus offering optimum protection in case
of failure.
Rated voltage: When using a standard HHD fuse-link for capacitor
protection, its rated voltage must be one circuit voltage class up
from the maximum application voltage. This is no longer required
with the new HHAC-type fuses. Here, the rated voltage of the
fuse-link needs only be one value up or on par with the maximum
application voltage at the site. Here's an example of direct, individual
capacitor protection:
* Line conductor voltage: 13.8 kV phase-phase
* Line configuration: star connection with grounded neutral point
* HHC fuse: 8.3 kV
Rated current: When choosing the proper rated current of a fuse-
link, the following parameters must be considered in accordance with
the I EC 549 and IEE C37.48b standards:
* Tolerance of capacitor apparent power: Sn+15%
* Tolerance of application voltage: Un+10%
* Harmonic contents
* Peak current stability (switch-on/switch off processes)
