Fusesaver
| Installation and operation manual
18
6 Maintenance
The Fusesaver has been designed for
a mechanical life of 2,000 reduced
maintenance operations.
This section describes the tasks a user
may need to perform on a Fusesaver
installation in service.
6.1 Firmware updating
Both the Fusesaver and communications
module have firmware to control their
operation. Siemens regularly releases
updated firmware that supports new
features and provides stability and
performance enhancements.
While in service a local user can connect
to the Fusesaver wirelessly via the
communications module and upload
new firmware using a dedicated PC
application. Refer to KFS-2035 manual
for detailed instructions.
6.2 Battery replacement
Both the primary cell and rechargeable
battery options use highly stable and
long life lithium-based chemistries.
Despite the long life of these
chemistries, it is likely that they require
replacement over the asset life of the
Fusesaver.
A user can monitor the estimated
remaining battery charge by connecting
wirelessly to the Fusesaver using the
Siemens Connect PC application.
Remove and replace the
communications module from the
Fusesaver in service according to
section 4.3.
6.2.1 Primary cell
communications module
The Primary cell communications
module has built-in sealed for life
non-rechargeable batteries that provide
an estimated 10-year life subject to
appropriate site selection. Sites with
inadequate line current to power the
Fusesaver or that have a high number of
faults may deplete the battery sooner.
When the battery is depleted, the entire
communications module must be
replaced. It is not possible to replace the
battery cells.
6.2.2 Rechargeable
communications module
The rechargeable communications
module battery has a life of
approximately eight years subject to
operating temperature (sustained high
temperature reduces life). When the
batteries are at end-of-life, the user can
replace the battery cells. Replacement
batteries can be ordered from a local
Siemens office or a local battery
supplier but must meet the following
specification.
During firmware updates the Fusesaver protection is deactivated.
Ensure upstream protective devices are available to provide back-up
protection in case of a downstream fault.
