Fusesaver™ medium-voltage circuit breaker

15-27 kV

Rated short-time withstand current up to 6.3 kA
Rated continuous current up to 200 A
Lightning impulse (BIL) up to 125 kV

Fusesaver circuit breaker

As the world's fastest medium-voltage outdoor vacuum circuit breaker, Fusesaver circuit breaker reduces the impact of temporary faults on lateral lines. Its sub-cycle operating time and wireless communications help utilities increase network reliability while minimizing operating costs of overhead medium-voltage networks.

Watch the videos below to learn more about Siemens Fusesaver medium-voltage circuit breaker.

Fusesaver medium-voltage outdoor circuit breaker product overview

Powercor Australia deploying Fusesaver on SWER lines to mitigate bushfire risk

Fusesaver optional remote control unit (RCU) product overview

Siemens Connect software instructional video

Fusesaver medium-voltage outdoor distribution circuit breaker UK Power installation

Fusesaver medium-voltage outdoor circuit breaker product overview

Powercor Australia deploying Fusesaver on SWER lines to mitigate bushfire risk

Fusesaver optional remote control unit (RCU) product overview

Siemens Connect software instructional video

Fusesaver medium-voltage outdoor distribution circuit breaker UK Power installation

Communications module with rechargeable batteries

Fusesaver medium-voltage outdoor distribution circuit breaker short overview

Fusesaver optional remote control unit (RCU) short overview

Application:

Saves fuses from blowing due to transient faults or completely replaces fuses. Cal Fire exempt for use in wildfire-prone regions.

Features include:

Sub-cycle breaking
Self-powered from less than one ampere line current
Encrypted wireless communications
Multi-phase operation
Lightweight at 12 lbs.
Battery backup
Load breaking up to 200 A
Inrush restraint
Cold-load pickup.

Options:

Rechargeable battery
Conductor, crossarm, or pole mounting
SCADA connectivity with remote control unit.

Feature	Description
O-CO reclose sequence	The Fusesaver with O-CO functionality is capable of closing onto a fault, detecting the fault current and tripping again. Further, the Fusesaver with O-CO functionality runs protection even when a line is de-energized such that if a fault occurs it will trip with a single shot protection mode.
Normal and fast curves configurable for all protection operations	The Fusesaver with O-CO functionality maintains two fully configurable protection curves that can be applied to any protection trip.
Protection mode control improvements	The user now has much greater configurability of protection functionality depending upon status of the external lever. Not only can the protection curve be changed, but also the protection sequence and the three phase lockout and pseudo three phase trip functions can be enabled or disabled. The protection sequence can be configured to OFF, single shot or O-CO and this can be changed via SCADA control if a remote control unit (RCU) is installed.
Thermal-overload protection	Provides self protection against excessive load current. Thermal-overload protection is always active.
Fault-passage indication functionality	When a Fusesaver trips to lockout on a permanent fault, the LED of the communications module will blink every three seconds for a user defined period of time up to seven hours.
Radio-communications encryption	Encryption has been added to the peer-to-peer communications.
Increased battery capacity	The battery capacity in the communications module has been increased to improve service life.
Capacity charging configurability	The user can now configure whether the capacitor charge shall always default to the battery when a communications module is fitted. This increases the battery life on lines with extreme numbers of line-current off events.
-40 °F (-40 °C) operation	The Fusesaver with O-CO functionality low-temperature operating range has been extended to -40 °F (-40 °C).

Ratings:

Voltage ratings of 15 kV or 27 kV
Rated short-time withstand current of 4 kA or 6.3 kA
Rated continuous current of 100 A or 200 A
Lightning impulses (BIL) of 110 kV or 125 kV.

Feature	Unit	Data
Rated voltage	kV	15.5			27.6
Rated current	A	100	200	200	100	200	200
Partner fuse ratings	A	≤50	≤100	≤100	≤50	≤100	≤100
Rated short-circuit breaking current, symmetrical	kA	4	4	6.3	4	4	6.3
Rated short-circuit making current, peak	kA	10	10	16	10	10	16
Rated short-time current duration	s	0.2	1	0.5	0.2	1	0.5
Fault-break operations at 100%	-----	70	70	30	70	70	30
Minimum line current for operation	A	0.5	1.0	1.0	0.5	1.0	1.0
Rated lightning-impulse withstand voltage	kV	110	110	110	125	125	125
Minimum tripping current (configurable)	-----	0.5x fuse rating
Rated operating sequence	-----	O-2 s-CO/O-1 s-C
Mechanical operations	-----	2,000
Rated frequency	Hz	50/60
Weight	lbs/kg	12.1/5.5

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