Siemens Fusesaver User manual

usa.siemens.com/fusesaver
Fusesaver®
Medium-voltage circuit
breaker installation and
operation manual

Fusesaver | Installation and operation manual 1
Contents
1
Safety information
1.1 Qualified person 2
1.2 Signal words 3
1.3 Safety instructions 3
1.4 Proper application 3
2
Packing and storage
2.1 Packaging 4
2.2 Receipt and handling 5
of shipment
3
Workshop testing
3.1 Dielectric test 6
3.2 Resistance of main circuit 6
3.3 Communications module 7
battery test
3.4 Operations test 8
4
Installation procedure
4.1 Connecting cables 9
4.2 Fusesaver mounting 9
4.3 Communications module 13
attachment/fitting
4.4 Fusesaver configuration 14
4.5 Fusesaver status check 14
5
Operation
5.1 Automatic operation 15
5.2 Manual operation 15
5.3 Electrical isolation 16
5.4 External lever 16
5.5 Fault passage indication 17
5.6 Fusesaver event data 17
6
Maintenance
6.1 Firmware updating 18
6.2 Battery replacement 18
6.3 Battery charging 19
6.4 Fusesaver replacement 20
6.5 Return an item 21
6.6 Spare parts 21
6.7 Manufacturer’s product 21
liability
6.8 Fusesaver disposal 21
6.9 Battery disposal 21
7
Troubleshooting
8
Disposal

Fusesaver | Installation and operation manual 2
1 Safety information
This manual provides installation, operation
and testing procedures for the Siemens
Fusesaver. Thoroughly read this manual
before installing and operating your
Siemens Fusesaver.
The information contained herein is general
and not intended for specific application
purposes. It does not relieve the user of
responsibility to use sound practices in
application, installation, operation, and
maintenance of the equipment purchased.
Only qualified personnel who are familiar with
this equipment should install or operate it.
For the purpose of this instruction
manual, a qualified person is one
who is familiar with the installation,
construction or operation of the
equipment and the hazards involved.
In addition, this person has the
following qualifications:
• Is thoroughly familiar with this
manual.
• Is trained and authorized to switch,
de-energize, clear, ground, and tag
circuits and equipment in accordance
with established safety procedures.
• Is trained in techniques to distinguish
exposed energized parts from other
parts of electric equipment and to
determine the nominal voltage of
exposed live parts.
• Is trained in the proper techniques to
determine approach distances
specified in the applicable local
standards.
• Is trained in the decision-making
process necessary to determine the
degree and extent of the hazard and
the personal protective equipment
and job planning necessary to
perform the task safely.
• Is trained in the proper care and
use of protective equipment, such
as rubber gloves, hard hat, safety
glasses or face shields, flash clothing,
etc., in accordance with established
safety practices.
• Is trained in rendering first aid.
1.1 Qualified person

Fusesaver | Installation and operation manual 3
For the purpose of this manual and product labels, DANGER indicates an imminently
hazardous situation which, if not avoided will result in death or serious injury.
For the purpose of this manual and product labels, WARNING indicates a potentially
hazardous situation which, if not avoided, could result in death or serious injury.
For the purpose of this manual and product labels, CAUTION indicates a potentially
hazardous situation which, if not avoided, may result in minor or moderate injury.
For the purpose of this manual and product labels, NOTICE indicates a potentially
hazardous situation that, if not avoided, may result in property damage.
These instructions cannot cover all possible variations in equipment options,
site specific restrictions, local procedures, and every contingency that may emerge
during installation, operation or maintenance. When additional information is
required to address any particular problem not adequately explained in this
manual, please contact your local Siemens Service Center for further advice.
Hazardous voltage – danger to life!
Do not work on energized equipment. Always de-
energize and ground the lines before working on the
equipment.
If live-line work must be performed, follow the
requirements of local occupational health and safety
regulations and employ personal protective equipment
(PPE) suitable for the voltages involved. It is the user’s
responsibility to develop safe and adequate working
procedures complying with these requirements.
Fusesaver may be energized from either side.
Always consider all parts as energized until they
are de-energized, tested for absence of voltage and
grounded.
The correct Fusesaver model must be selected for
the network application. Fusesaver is suitable for
use on networks with phase-to-phase maximum
voltage levels of 27 kV. The user must assess the
potential load and fault current levels at the point of
application and confirm these are within the
capability of the Fusesaver model selected.
1 Safety information
1.2 Signal words
The signal words “DANGER”, “WARNING”, “CAUTION”, and “NOTICE” used in this
manual indicate the degree of hazard that may be encountered by the user.
These words are defined as:
1.3 Safety instructions
1.4 Proper application

Fusesaver | Installation and operation manual 4
Do not open the box through the bottom flap as the box cutter
can cause damage to the Fusesaver.
2 Packing and storage
2.1 Packaging
Each Fusesaver or Fusesaver kit is
packaged in a cardboard box labeled
with a contents list and the serial
number of the Fusesaver.
To open the box, use a box cutter to
cut through the sealing tape and then
fold open the top flap to access the
contents. All items in the box can then
be easily removed. Other miscellaneous
items such as mounting hardware are
packed separately.
Typical Weights and Dimensions:
Package of line-mounted
Fusesaver
Package of cross arm/pole-mounted
Fusesaver
21.85” (555 mm) L x 14.37” (365 mm) W
x 9.84” (250 mm) H
21.85” (555 mm) L x 14.37” (365 mm)
W x 9.84” (250 mm) H
Approximately 18.73 lbs (8.5 kg) gross Approximately 27.56 lbs (12.5 kg)
gross

Fusesaver | Installation and operation manual 5
2 Packing and storage
2.2 Receipt and handling of shipment
On receipt, the contents of each box
should be checked for shipping damage,
and the manufacturer informed
immediately if any damage is evident:
• Check the cardboard box for
shipping damage.
• Major damage must be documented
photographically.
• Ensure that the transport
company confirms any damage
to the cardboard box.
The Fusesaver box should be
handled with care and protected
from water exposure. Store in a
clean and dry location.
Do not drop the Fusesaver or any of its parts or accessories.
Do not store the Fusesaver with the communications module connected.
This will drain the battery in the communications module.

Fusesaver | Installation and operation manual 6
Hazardous voltages are present during dielectric
testing.
Contact with an energized unit under test will
likely result in severe personal injury or death.
Dielectric testing should occur with a grounded
test cage to provide a physical barrier between the
technician and the equipment under test.
The vacuum interrupter may emit x-rays during
dielectric testing.
X-rays may be hazardous to your health.
Dielectric testing should be conducted within a solid
sheet metal cage made from ferrous material with a
minimum thickness of 0.06” (1.6 mm). The technician
should maintain a minimum 9.84 ft (3 m) distance to
the Fusesaver under test.
3 Workshop testing
3.1 Dielectric test
To confirm the dielectric integrity
of the vacuum interrupter the user
can apply a 48 kV ac (50/60 Hz)
voltage across the open contacts
of the Fusesaver for 60 seconds.
Note that vacuum interrupters can
experience self-extinguishing
momentary breakdowns under high
voltages. These momentary breakdowns
do not indicate a loss of vacuum or
failure of the test.
Every Fusesaver is inspected and tested at
the factory before dispatch. No further testing
by the end user is required. However, if the
user has a policy to do confirmation testing
before deployment, then the following
inspection and test regimes are possible
by suitably qualified personnel.
3.2 Resistance of main circuit
To confirm the integrity of the primary current path the user can measure the
resistance from terminal to terminal using a standard dc resistance meter with
a minimum 10 A capability.
The recommended resistance measurement by model is as follows:
Model type Low range Standard range High range
DC resistance µΩ <8070 <1350 <390

Fusesaver | Installation and operation manual 7
3 Workshop testing
Communications module battery test
Blinks Charge Primary cell Rechargeable
0Flat DO NOT USE DO NOT USE
1Very
low
DO NOT USE Charge
before use
2Low USE NOT
RECOMMENDED
Charge
before use
3Marginal OK to use –
replace soon
Charge
before use
4Good OK to use OK to use
5Full OK to use OK to use
The LED blinks once brightly and then rapidly while the test is underway. At the
end of the test, the LED blinks a number of times to indicate the battery charge
level. This blink pattern repeats three times. For example, the blink pattern for a
battery with a “low” charge is: xx – 1s – xx – 1s – xx where “x” is a blink. Refer to
section 6.2 for how to recharge batteries.
3.3 Communications module battery test
The communications module is available in two versions:
• Primary cell (non-rechargeable).
• Rechargeable.
Do not electrically probe the three gold plated pins as this may damage
the communications module.
The user can check the battery charge level by pressing both actuating buttons
(red and green) simultaneously of the communications module when separated
from the Fusesaver.
ACTUATING
BUTTON
ACTUATING
BUTTON

Fusesaver | Installation and operation manual 8
3 Workshop testing
Fusesaver operation
3.4 Operations test
The user can conduct an operations test to confirm the Fusesaver can trip and
close. Connect the communications module to the Fusesaver and wait until the
LED blinks to confirm connection to the Fusesaver. To open the Fusesaver press
the GREEN actuating button. To close the Fusesaver press the RED actuating button.
After pressing the applicable actuating button, the LED starts flashing. After the
configured delay of up to 60 seconds, the Fusesaver operates. The indicator
changes color to confirm the operation.
Conducting excessive operations or leaving the communications module
connected to the Fusesaver for extended periods without primary line
current drains the battery in the communications module.

Fusesaver | Installation and operation manual 9
4 Installation procedure
Fusesaver installation can be achieved using
live-line or dead-line (under isolation) processes.
4.1 Connecting cables
The preferred method for connecting to the Fusesaver is with a cable that has a
two-hole NEMA palm crimped to one end. Aluminium cables and palms connected
with galvanized steel bolts are recommended wherever possible. If the connecting
cable is not aluminium, an appropriate bi-metallic lug classified for use with
aluminium terminals is required.
The cable used to connect to the Fusesaver should have the following typical values
by model type to achieve full current rating of the model:
Model Aluminium Copper
Low range > AWG 2 (30 mm²) > AWG 5 (15 mm²)
Standard range > AWG 0 (50 mm²) > AWG 3 (25 mm²)
High range > AWG 0000 (100 mm²) > AWG 000 (70 mm²)
The cable may be bare or insulated. Water blocking is not required. The same cable
used to connect the fuse to the main line is normally adequate for connecting to
the Fusesaver.
4.2 Fusesaver mounting
The Fusesaver is an electrically floating
device so it requires no grounding and
can be installed using three different
approaches. In all cases, the Fusesaver
should be mounted horizontally.
For mounting options not covered here
contact a Siemens Service Center.
The Siemens Service Center has
available general arrangement
drawings and solid models of various
configurations of the following
installation options, that the end user
can utilize to create their customized
pole top construction drawings.
4.2.1 Line mount installation
The most common method for
mounting of the Fusesaver is to
hang it directly from a suitably sized
conductor. The line clamp assembly
provides a mechanical mounting point
and is not an electrical connection as
it has an insulating sleeve between
the clamp and the line. A cable is still
required to provide an electrical
connection from the Fusesaver terminal
to the line.
Do not hang the Fusesaver device from an
undersized conductor. This may result in
conductor fatigue and failure of the conductor.
It is the user’s responsibility to determine whether
the size and type of conductor or dead-end that the
Fusesaver is being mounted from is mechanically
capable of supporting the weight of the Fusesaver.
As a guide, if the mounting of the Fusesaver causes
a kink in the conductor, then the conductor is not
suitable for line hanging of Fusesaver.

Fusesaver | Installation and operation manual 10
4 Installation procedure
Line-mounted Fusesaver
Prepare the Fusesaver on the ground prior to installation by fitting the line clamp,
connecting cables and birdguard as follows:
Fusesaver ready for installation
A. Prepare the connection cable
by cutting to length, stripping
insulation as required and fitting
a 2-hole NEMA palm to one end.
B. Slide the birdguard over the
connecting cable.
C. Attach the connecting cables
2-hole palm lug to the Fusesaver
and orient the connecting
cable using 1/2" or M12 bolts
(torque 30 lb-ft (40 Nm)).
D. Stretch the flange of the
birdguard over the first shed
on the Fusesaver for the full
circumference. The bird guard
should grip the shed securely.
E. Neatly coil the connection cables.
The Fusesaver assembly can now be installed to the line according to the following steps:
Clamping to dead-end
A. Loosen the M10 bolts in the
line clamp assembly. The plastic
insulating sleeve is held in the line
clamp assembly during fitment.
B. Secure the Fusesaver with the line
clamp assembly ensuring the plastic
sleeve is seated on the conductor
dead-end and tighten the M10 bolts
(torque 15 lb-ft (20 Nm)).
C. Uncoil and then secure the
connection cable at the line clamp
end onto the conductor with a
parallel groove clamp (torque is
marked on the parallel groove
clamp) or other appropriate line
connection device.
D. Uncoil and then secure the other
connection cable to the partner
fuse or isolating link assembly.
E. Conduct line energization
process according to local rules
and regulations.
It is recommended to fit the Fusesaver to the conductor dead-end or to
fit an armor rod over the conductor before connecting the Fusesaver.

Fusesaver | Installation and operation manual 11
4 Installation procedure
4.2.2 Cross-arm mount installation
In situations where line mounting is not possible, the Fusesaver can be mounted
from the crossarm. The solution consists of a composite station post insulator with
custom end brackets to facilitate connection to the Fusesaver and the crossarm.
A wild-life guard is available to extend the effective creepage distance.
Cross-arm-mounted Fusesaver
The crossarm mount is a standard composite station post insulator with custom
end brackets suitable for connection to crossarm sizes: 3.94” x 2.95” (100 x 75 mm),
3.94” x 3.94” (100 x 100 mm), 4.92” x 3.94” (125 x 100 mm) or 4.92” x 4.92”
(125 x 125 mm).
Line-mounted Fusesaver
Prepare the Fusesaver on the ground prior to installation by fitting the line clamp,
connecting cables and birdguard as follows:
Fusesaver ready for installation
A. Prepare the connection cable
by cutting to length, stripping
insulation as required and fitting
a 2-hole NEMA palm to one end.
B. Slide the birdguard over the
connecting cable.
C. Attach the connecting cables
2-hole palm lug to the Fusesaver
and orient the connecting
cable using 1/2" or M12 bolts
(torque 30 lb-ft (40 Nm)).
D. Stretch the flange of the
birdguard over the first shed
on the Fusesaver for the full
circumference. The bird guard
should grip the shed securely.
Applying an excessive cantilever load on the
Fusesaver will damage the product.
The maximum cantilever load is 110 lbs (50 kg).
Do not pull on the Fusesaver.

Fusesaver | Installation and operation manual 12
4 Installation procedure
The Fusesaver assembly can now
be installed to the crossarm as per
the following steps:
A. Bolted connection (I): Drill a
vertical hole through the crossarm
diameter 7/8" (22 mm). Attach the
crossarm bracket with post insulator
on the crossarm using 3/4" or M20
bolt (torque dependent on the
material of the crossarm).
B. Fishplate connection (II)
(optional): Attach the crossarm
bracket with post insulator on
the crossarm with the fish plate
using included 1/2" or M12 bolts
(torque dependent on material
of the crossarm but not more
than 30 lb-ft (40 Nm)).
Bolted connection
Fishplate connection
C. Secure the connection cable on
the conductor above the crossarm
with a parallel groove clamp
(torque is marked on the parallel
groove clamp) or other approved
line connection device.
D. Uncoil and then secure the
connection cable to the rating
plate end of the Fusesaver.
E. Uncoil and then secure the other
connection cable at the crossarm
side of the Fusesaver to the partner
fuse or isolating link assembly.
F. Fit the wildlife guard over the first
shed of both the composite post
insulator and the Fusesaver.
G. Close the wildlife guard on the
Fusesaver and secure in place using
the plastic push mount fasteners.
The wildlife guard should grip the
Fusesaver tightly.
H. Conduct line energization
process according to local
rules and regulations.
Wild life guard fitment

Fusesaver | Installation and operation manual 13
4 Installation procedure
Pole-mounted Fusesaver
Prepare the Fusesaver on the ground
prior to installation by fitting the
Fusesaver to the pole mount assembly
and attaching the connecting cables
in the same way as per the crossarm
mount assembly described previously.
The Fusesaver assembly can now
be installed to the pole as per the
following steps:
A. Bolted Connection (I): Drill two
7/8" (22 mm) diameter holes
through the pole with 8" (200 mm)
spacing. Attach the pole mount
bracket to the pole using M20 bolts
B. Bolt and strap (II): Drill a 7/8" (22
mm) diameter hole through the
pole. Attach the pole mount bracket
to the pole via the upper hole using
a 3/4" or M20 bolt. Fit strapping
through the slots in the base of the
bracket to the pole and tighten.
C. Attach the connection cables
and wildlife guard as per crossarm
mounting described previously.
4.3 Communications
module attachment/fitting
The communications module has
been designed so that it can only be
attached to the Fusesaver in the correct
orientation and once in place holds
itself with self-engaging locking tabs.
The communications module can be
installed onto the Fusesaver before
the Fusesaver is installed on the line
or it can be installed and removed
at any time later from ground level.
Ground level attachment and
removal is achieved with the use of the
communications module attachment
tool and a live-line tool (hot stick) with
a universal splined head. A different
attachment tool is required for the
primary cell and the rechargeable
battery versions of the communications
module.
Primary cell attachment tool
Rechargeable attachment tool
4.2.3 Pole mount installation
The Fusesaver can also mount directly on the pole using a variation of the crossarm
mounting solution. The bracket on the earth end of the composite post insulator
is designed for pole mounting. The wildlife guard is again recommended.
Applying an excessive cantilever load on the
Fusesaver will damage the product.
The maximum cantilever load is 110 lbs (50 kg).
Do not pull on the Fusesaver.
Falling objects may cause serious injury.
When removing or installing a communications
module use appropriate personal protective
equipment including a hard hat.

Fusesaver | Installation and operation manual 14
4 Installation procedure
To install a communications module to a Fusesaver in service follow these steps:
Fitting communications module
A. Fit the attachment tool to the
universal splined head on a
live-line tool (hot stick)
B. Place communications module
in the attachment tool.
C. Lift communications module
into the air and insert it into the
Fusesaver.
D. The attachment tool is then
lowered away, and the
communications module is left
behind.
When a communications module
is plugged into the Fusesaver it can
take up to 40 seconds for the Fusesaver
and communications module to
discover each other. The LED on the
underside of the communications
module is flashed four times in quick
succession to let the user know that this
discovery has taken place.
To operate multiple Fusesavers in
a ganged fashion, the site must have
been configured to support this.
After connection to the Fusesaver, the
communications modules have to find
each other over their short-range radio
links and to bind together as a group,
so that ganged operation is possible.
It can take up to a minute after the
last communications module is installed
for the group to form.
When the group is formed, all Fusesavers
in the group flash their LEDs with four
bursts of three flashes. Therefore when
installing communications modules to
operate in ganged mode wait for at least
one minute or until you see this LED
pattern on the members of the group
before pushing a trip or close actuator.
To remove a communications module
from a Fusesaver in service, follow
these steps:
Removing communications module
A. Rotate live-line tool (hot stick)
with attachment tool 180°.
B. Raise the tool to engage the
communications module.
C. Lift the attachment tool into
the air and insert it into the
communications module.
D. The latching arms catch on the
mating feature in the housing of
the communications module.
E. Pull downwards with 10-20 lbs
(5-10 kg) of force and remove
the communications module from
the Fusesaver.
4.4 Fusesaver configuration
The Fusesavers can be configured either
before installation in the workshop or
after installation as per operational
preferences of the user. Refer to KFS-
2035 manual for how to do this.
4.5 Fusesaver status check
As a final check after installation,
configuration and line energization
it is possible to connect to the Fusesaver
wirelessly using the PC application
“Siemens Connect”. Refer to KFS-2035
manual for how to do this.
With this PC application, the user
can check the line current flowing
through the Fusesaver, confirm that
the protection is running and that the
Fusesaver is otherwise functioning
as expected before leaving the site.

Fusesaver | Installation and operation manual 15
5 Operation
5.1 Automatic operation
When in the closed state the
Fusesaver operates automatically
to clear faults on the line as per the
user-configured settings. Refer to
KFS-2034 manual for details on
Fusesaver configuration options.
5.2 Manual operation
The communications module is fitted
with two actuators. When operated by
pushing upwards, the Fusesaver opens or
closes. The actuators are color coded:
Color Operation
Green Opens the Fusesaver
Red Closes the Fusesaver
Note that by special order these colors
can be reversed.
Operation of actuators
After pushing an actuator, there is a
time delay before the Fusesaver
operates. The delay is configurable from
0 to 60 seconds for an open and fixed at
60 seconds for a close.
When an actuator has first pushed the
LED on the communications module
flashes for several seconds at a fast rate
to let the user know that the operation
has been requested. Once the operation
is scheduled, the LED keeps blinking
confirming the trip or close instruction
is pending. If the action is rejected,
then the LED stops blinking. Reasons
for rejection might include that the
Fusesaver is already in the requested
state or because the external lever is
pulled down.
Once scheduled, the action can only
be cancelled by use of the external
lever on the Fusesaver subject to the
configuration setting. Cancellation only
applies to the Fusesaver whose lever
is pulled down.
When multiple Fusesavers are used
on a two or three phase line, they can
be configured so that pushing the
actuator on one communications
module operates all the Fusesavers on
the line as if the actuators have been
pushed on all three at the same time.
This is achieved by the communications
modules using their radios to
communicate with each other.
Ganged manual operation
PUSH

Fusesaver | Installation and operation manual 16
Do not pull down the lever with excessive force.
The lever fully operates when it is in the
horizontal position.
5 Operation
5.3 Electrical isolation
The Fusesaver can be used to open
the circuit and de-energize the line after
which another device can be used to
provide electrical isolation.
For example:
• Disconnecting or removing bridges
at the birdguard end to provide
the visible air gap for the applicable
system voltage;
• opening adjacent fuses or isolating
links; and
• opening nearby air break switches.
Electrical isolation
5.4 External lever
The external lever is used by an
operator to change the way a Fusesaver
works for operational reasons such as
live line working. The effect of pulling
the lever down is determined by
configuration (refer KFS-2034 manual
for options).
The effect is in three areas:
• Protection mode
• Manual operation
• SCADA control.
When the lever has changed state, the
LED light blinks ten times in five
seconds to confirm to the operator that
the Fusesaver has recognized the lever
position change.
External lever operation
PULL
It is the responsibility of the user to ensure the installation method and
isolation distances achieved comply with local regulations and good
practice.

Fusesaver | Installation and operation manual 17
5 Operation
5.5 Fault passage indication
The Fusesaver has a configurable fault
passage indication function that causes
the LED to flash for a specified time
after the Fusesaver detects or operates
on certain fault types. The LED blinks
with a steady ON-OFF pattern until
either the configured time-out occurs or
the local operator closes the Fusesaver.
If the Fusesaver has tripped to
lockout, then the LED is powered by
the communications module battery.
5.6 Fusesaver event data
While in service a local user can connect
to the Fusesaver wirelessly using the
PC application Siemens Connect.
Refer to KFS-2035 manual for how
to do this. With this PC application,
the user can check the operation
status of the Fusesaver, view last fault
data and download the event log.

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.

Fusesaver | Installation and operation manual 19
6 Maintenance
Battery specification
1) Molicel lithium-ion battery
(18650, 3.6 V, 2000 mAh).
2) Contact nipple to be welded to
positive terminal by specialist
battery manufacturer.
Replace the battery cells according to the following procedure:
Battery replacement
A. Remove the battery compartment
cover by undoing the four screws.
B. Remove the battery cells from
their holder.
C. Fit new cells while ensuring
correct polarity.
D. Press both actuators and conduct
a battery test according to section
3.3 and confirm batteries are
adequately charged.
E. Check and clean battery cover
compartment seal.
F. Fit battery compartment cover
by tightening screws.
G. Reset the battery life by holding
down the GREEN lever for 10
seconds. LED blinks 3 times quickly
to confirm battery life is reset.
H. If required, connect a charger
to recharge batteries.
I. Communications module is ready
for return to service.
6.3 Battery charging
The battery cells in the rechargeable
communications module can be
recharged using a standard off-the
-shelf battery charger suitable for
18650 lithium-ion cells.
A. Remove the battery cells from
the rechargeable communications
module.
B. Charge the battery cells using the
bench charger and according to the
instructions of the charger unit.
C. Fit the battery cells back into the
communications module taking
care to get the polarity correct.
D. Fit the cover and tighten the screws
ensuring the seal is correctly
seated.
Recharging of the batteries in the primary cell communications module
is not possible.
• Siemens does not approve the use of
alternative battery types.
• This battery MUST NOT be used without the
nipple fitted.
21
Ø 0.71”
(18 mm) 2.64” (67 mm)