EP2492947A1 - Elektrische Unterwassersicherung - Google Patents

Elektrische Unterwassersicherung Download PDF

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Publication number
EP2492947A1
EP2492947A1 EP11155413A EP11155413A EP2492947A1 EP 2492947 A1 EP2492947 A1 EP 2492947A1 EP 11155413 A EP11155413 A EP 11155413A EP 11155413 A EP11155413 A EP 11155413A EP 2492947 A1 EP2492947 A1 EP 2492947A1
Authority
EP
European Patent Office
Prior art keywords
fuse
section
connection
subsea
conductor trace
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP11155413A
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English (en)
French (fr)
Other versions
EP2492947B1 (de
Inventor
Stian Oroe Moen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP11155413.5A priority Critical patent/EP2492947B1/de
Publication of EP2492947A1 publication Critical patent/EP2492947A1/de
Application granted granted Critical
Publication of EP2492947B1 publication Critical patent/EP2492947B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/041—Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
    • H01H85/046—Fuses formed as printed circuits
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/46—Circuit arrangements not adapted to a particular application of the protective device
    • H01H85/463—Circuit arrangements not adapted to a particular application of the protective device with printed circuit fuse
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/38—Means for extinguishing or suppressing arc
    • H01H85/40—Means for extinguishing or suppressing arc using an arc-extinguishing liquid

Definitions

  • the invention relates to a subsea electrical fuse adapted to be operated in a pressurized environment and to an electronic device comprising such fuse.
  • Oil platforms are often used in offshore oil and gas production. In the operation of offshore oil platforms, it can be necessary to install electronics under water, e.g. for controlling functions of a subsea Christmas tree or a subsea blowout preventer. More recently, subsea processing facilities were established in which processing equipment such as electrically driven pumps and gas compressors are relocated to the ocean floor. The subsea processing facility requires a power grid as well as control, monitoring and communication systems. It needs to be ensured that the installed equipment operates reliability even under the high pressures exerted by the sea water at great depths of water of e.g. more than 1000, 2000 or even more than 3000 meters.
  • a conventional fuse comprises a fuse body, which may be made of ceramic, glass, plastic, fiberglass or the like, and a fuse element.
  • the fuse element is generally a metal strip or wire and is mounted between two electrical terminals of the fuse. At currents above the rated current, the fuse element melts, thereby interrupting the electrical circuit. The faulty circuit can thus be isolated, whereby damage to other electronic components of the system can be prevented.
  • a conventional fuse can be placed in a pressure resistant canister and maintained at a pressure of about one atmosphere.
  • the canister needs to be thick walled in order to withstand the high pressures at water depths of more than 3000m. Penetrators are further required to provide an electrical connection to the fuse through the wall of the canister.
  • This solution of providing a subsea fuse is very cost intensive due to the canister and the penetrators and further requires a considerable amount of space. Also, such canisters tend to be very heavy, resulting in substantial costs for transportation and installation.
  • a subsea electrical fuse adapted to be operated in a pressurized environment.
  • the fuse comprises a section of conductor trace on a printed circuit board.
  • the conductor trace section has a first connection section and a second connection section.
  • It further comprises at least one fuse element, the fuse element being a section of the conductor trace that has a reduced cross section compared to the cross section of the connection sections.
  • the at least one fuse element provides an electrical connection between the first connection section and the second connection section.
  • the fuse element is adapted to melt if an electric current through the fuse element exceeds a threshold current. Thereby, the electrical connection that is provided by the fuse element between the first and second connection sections is interrupted.
  • the fuse As the fuse is provided by a conductor trace on a printed circuit board (PCB), the fuse can be pressurized. In particular, it is capable of being operated in a liquid filled pressure compensated enclosure in which, depending on the deployment depth, pressures of more than 100 bar, 200 bar or even more than 300 bar may prevail. Further, as it does not need to be protected in a pressure resistant enclosure, it is compact and can be produced cost efficiently.
  • PCB printed circuit board
  • the fuse element has a width in the range of 0.1 to 2 mm. If the conductor trace has a constant thickness, the cross section of the conductor trace will be determined by its width. The width of the fuse element may thus be used to adjust its current rating. In other embodiments, it is also conceivable to vary the thickness of the conductor trace for changing its cross section.
  • the thickness of the conductor trace may lie within a range of 17-100 ⁇ m, it may for example be 35 ⁇ m.
  • the first and second connection sections of the conductor trace section may have a width of at least 1mm, preferably at least 3mm. This may ensure a reliable electrical connection towards the fuse.
  • the length of the fuse element may lie within a range of about 0.5mm to about 10mm, preferably within a range of about 1mm to about 5mm.
  • the conductor trace section comprises at least two fuse elements connected in series between the first and the second connection section.
  • the first and second connections sections can thus be spaced further apart and the breaking capacity of the fuse may be increased.
  • the fuse elements may be adapted so as to break (or melt) simultaneously when the threshold current is exceeded. This may be achieved by precisely controlling the width of the fuse elements. In particular for short circuit protection, the required tolerances are low enough so that a configuration of the fuse in which the fuse elements break essentially simultaneously can be achieved.
  • the conductor trace section may further comprise at least one cooling section which provides an electrical connection between two fuse elements.
  • the cooling section may comprise a section of the conductor trace that has a cross section larger than the cross section of the fuse elements. It may for example have a larger width, which may be equal to the width of the connection sections.
  • the fuse can thus comprise a number of alternately arranged fuse elements and cooling sections, which are connected in series between the first and second connection sections. Cooling may furthermore be provided by the first and second connection sections, in particular if they have a width larger than the width of the fuse elements.
  • the fuse may for example comprise 3, 4, 5 or even more fuse elements, and accordingly, 2, 3, 4 or more intermediary cooling sections. Between 1 and 10 fuse elements may for example be provided.
  • an arc may form between the two adjacent cooling pads (or a cooling pad and a connection section).
  • the cooling pads may provide an area in which the PCB and the dielectric liquid are cooler than close to the fuse elements, thereby preventing a jumping of the arc across the cooling pads and the formation of a larger arc over the entire fuse (i.e. between the two connection sections).
  • the different fuse elements may have substantially the same width. A simultaneous melting of the fuse elements may thus be achieved.
  • the first and second connection sections and the one ore more cooling sections may also have the same (larger) width.
  • the conductor trace section comprises at least two fuse elements disposed on different sides of the printed circuit board.
  • the fuse may thus be made even more compact.
  • the conductor trace section may comprise at least two segments disposed on different sides of the printed circuit board, wherein each segment comprises a fuse element and at least one cooling section.
  • One of said segments comprises the first connection section and another of said segments comprises the second connection section.
  • the segments are connected in series between said first and second connection sections.
  • the cooling section of a segment on one side of the PCB is coupled to the cooling section of a neighbouring segment on the other side of the PCB by means of one or more vias. Again, the width of the cooling section is larger than the width of the fuse elements.
  • Vias also termed "Vertical Interconnect Access" are electrical connections between different sides or layers of a printed circuit board. They can be provided by electroplated holes, annular metallic rings, small metallic rivets or the like.
  • the circuit track section may for example comprise a plurality of such segments disposed alternately on opposite sides of the PCB.
  • a compact design of the fuse may thus be achieved even when implementing a larger number of fuse elements. It should be clear that other configurations are also conceivable, for example a number of fuse elements connected in series on each side of the PCB, the two series on the different sides of the PCB being interconnected by vias.
  • each connection section has a tapered end towards which one of the at least one fuse element is coupled.
  • the tapered end may increase the breaking capability of the fuse.
  • the ends of the cooling sections towards which the fuse elements are coupled may certainly also be tapered.
  • the subsea electrical fuse comprising the at least one fuse element is adapted to have a breaking capacity of at least 200 A at 24V AC (alternating current), or even of at least 1000 A at 690V AC.
  • the fuse is capable of breaking at least this short circuit current for the given voltage.
  • the breaking capacity may for example be adapted by adjusting the number of fuse elements and cooling sections connected in series and/or by adjusting their geometry. In particular the distance of the connection sections may be adjusted by changing fuse element member and geometry in order to control the breaking capacity.
  • the current rating of the fuse i.e. the threshold current above which the fuse 'blows'
  • the subsea electrical fuse may for example be designed to have a current rating in a range between 0.1-50A at e.g. 24V or 690V AC. In other configurations, the current rating may lie in the range of 2A to 40A or of 10A to 20A at these voltages.
  • the conductor trace which makes up the fuse may be a copper trace.
  • the conductor trace section may be coated with a solder resist coating for insulation. This can prevent leakage currents and short circuits.
  • a subsea electronic device comprising at least one subsea electrical fuse having any of the configurations mentioned above is provided.
  • the fuse By means of the fuse, an effective short circuit or overcurrent protection of the subsea electronic device is achieved.
  • the subsea electronic device further comprises a pressure compensated enclosure filled with dielectric liquid, the subsea electrical fuse being disposed in said enclosure in said dielectric liquid.
  • the dielectric liquid can act as a high resistance path if an arc occurs when the one or more fuse elements melt.
  • the dielectric liquid may further have a cooling effect which can lead to a faster extinction of the arc. This can result in a reduced arc time and thus in a faster circuit break time of the fuse. It may furthermore lead to an increased short circuit breaking capacity and a higher voltage rating.
  • the printed circuit board on which the subsea electrical fuse is provided may comprise further electronic components of the electronic device or may be electrically coupled such electronic components (i.e. the PCB with the fuse and the electronic components may be provided separately).
  • the electronic components may be supplied with electric power through the subsea electrical fuse. Accordingly, if a short circuit occurs in one of the electronic components, the fuse will interrupt the power supply and prevent further damage to upstream or downstream components, such as transformers or the like.
  • Figure 1 shows a subsea electrical fuse 10.
  • the fuse 10 is adapted to operate in a high pressure environment, e.g. at pressures which prevail at water depths of more than 1000m, 2000m or even more than 3000m.
  • the fuse is adapted for a placement into a pressure compensated enclosure, such as a subsea canister comprising one or more pressure compensators, which is filled with dielectric liquid.
  • the pressure of the dielectric liquid is equalized to the surrounding water pressure by means of the pressure compensator.
  • the fuse comprises a section of a conductor trace 11 on the printed circuit board 12.
  • the conductor trace can be made of any material suitable for the production of traces on a PCB, for example copper. Any known and suitable manufacturing process can be used to pattern the PCB.
  • the copper trace section 11 which makes up the fuse comprises the following structural features. For contacting the fuse, it comprises a first connection section 13 and a second connection section 14. These may be contacted in different ways. Conductor traces on the circuit board 12 may directly lead to (and contact) one or both connection sections 13,14, so that the fuse can be directly connected to circuitry on the PCB 12.
  • the connection sections may also be contacted mechanically, e.g. by a clamp, a socket or the like. Other possibilities include mounting a connector to a connection section or contacting it by vias in the PCB. It should be clear that these are only some examples for contacting the connection sections 13, 14 of fuse 10 and that further ways of contacting are certainly conceivable.
  • connection section 13 is electrically coupled to the second connection section 14 by an alternating series of fuse elements 15 and cooling sections 18.
  • Each connection section is coupled to a fuse element, with fuse elements being coupled towards one another by means of an intermediate cooling section. All elements are connected in series between the first and second connection sections 13, 14.
  • the fuse elements 15 are sections of the conductor trace 11 that have a width smaller than the width of the connection sections 13, 14 and the cooling sections 18.
  • the height or thickness of the conductor trace 11 is the same over the circuit board 12, so that the cross section of the trace is proportional to its width.
  • the cross section of the conductor trace is proportional to the electrical conductivity. Accordingly, the conductivity or resistance of the fuse element can be controlled by adjusting its width. In other configurations, it is also possible to adjust the electrical conductivity by adjusting the height or thickness of the fuse element. Yet this involves a more complex manufacturing process. Due to their smaller cross section, the fuse elements 15 may also be termed 'weak links'.
  • the fuse elements will heat up until they melt if a large enough current passes through them.
  • the threshold current above which the fuse elements break or melt i.e. the fuse blows, defines the current rating of the fuse.
  • an arc will form between the unmelted remnants of the conductor trace. If there are several fuse elements connected in series, as in Figs. 1 and 2 , a series of arcs will form, each arc forming between a pair of cooling sections 18 or between a cooling section 18 and a connection section 13, 14. A certain voltage is required to maintain each arc.
  • the arcs will be extinguished quickly.
  • the sum of voltages can be increased by increasing the number of fuse elements in series.
  • the current flow is terminated when the arcing stops.
  • the time until the current flow is stopped is the circuit break time of the fuse.
  • the melting of the fuse elements efficiently stops the current flow through the fuse and thus through connected circuits.
  • the width of the fuse elements 15 is smaller than the width of the connection sections 13, 14 and the width of the cooling sections (also termed cooling pads) 18.
  • the connection sections and the cooling sections will thus not be affected by the current flow, as the fuse elements will melt before these sections experience any detrimental effects.
  • the fuse elements may warm up.
  • the larger width and the higher electrical conductivity of the connection sections and the cooling sections will reduce the heating. Accordingly, the cooling sections provide a cooler surface, and thus an area in which the PCD and the dielectric liquid are cooler than at the fuse elements. This ensures that if a searies of arcs if formed when the fuse blows, the arcs will not jump across the cooling sections to form one large arc over the entire fuse.
  • the voltage required to sustain the arc is lower than the voltage available.
  • an arc may require about 50V to maintain.
  • the actual width of the fuse elements depends on the desired current rating. For a conductor trace thickness of 35 ⁇ m, the width may lie in a range between about 0.1mm and about 2mm. For lower or higher ratings, smaller or larger conductor trace widths can be used, respectively.
  • the fuse elements are configured to have substantially the same width. This way, a simultaneous breaking of the fuse elements, in particular in short circuit protection, can be ensured.
  • the width of the fuse elements can be adjusted to maintain the cross section of the conductor and thus the current rating.
  • a range of current ratings can be realized with the fuse 10.
  • the fuse When protecting a circuit operating at 24 V AC, the fuse may have a current rating in the range of 1A to 50A, in particular of 10A to 50A. Other ranges in which the current rating may lie include 2A to 40 A or 4A to 20A. The current rating may for example be 4 or 5A.
  • the fuse When operated at 690V, the fuse may can be adapted to a lower rating due to the higher voltage, it may be adapted to have a rating between 0.1A and 50A, in particular between 10 and 50 A. Other ranges in which the current rating may lie include 5A to 30A and 10A to 20A.
  • the fuse can be adjusted to these ratings by varying the width of the one or more fuse elements.
  • the width of the cooling pads may for example be increased to lower the operation temperature of the fuse elements.
  • the length of the fuse elements can be varied. By increasing the length, a larger separation of the connection sections can be achieved.
  • the length of a fuse element 15 may for example lie within a range from 1mm to 10mm.
  • the number of fuse elements 15 can also be adjusted, with a corresponding change to the number of intermediate cooling sections 18.
  • three fuse elements 15 and two cooling sections 18 are provided.
  • between 1-10 fuse elements may be provided (with 0-9 cooling sections, respectively). The positions at which the current flow is interrupted and the distance between the connection sections can be fine tuned this way.
  • the breaking capacity of the fuse can be adjusted. It may be increased by increasing the spatial separation between the connection sections.
  • the fuse 10 has a breaking capacity of at least 200 A, i.e. it is capable of breaking a short circuit current which is at least this high.
  • the fuse 10 can be adapted to have a breaking capacity of at least 1000A.
  • the fuse can be used for overcurrent or short circuit protection.
  • the fuse can be configured to have a current rating that is only a fraction above the nominal current at which the fuse is operated.
  • the threshold current at which the fuse is triggered can be 2-3 times higher than the nominal current. The configuration again depends on the particular application.
  • the printed circuit board (PCB) 12 can be manufactured to only comprise the conductor trace section 11 providing the fuse, or it can be manufactured to comprise further conductor traces, pads and other structures (not shown) commonly used on PCBs. In the latter case, the PCB 12 may certainly comprise electric components such as chips, ICs (integrated circuits), resistors, capacitors and other components in the assembled state.
  • the fuse can be coupled to these components by conductor traces (not shown) connected to the connection sections 13 and 14.
  • the fuse 10 can for example be connected in series with the power supply which feeds the circuitry provided on PCB 12. In other configurations, the fuse can be connected in series with a power supply by contacting the connection section 13, 14.
  • a short circuit occurs in a circuit that is supplied through the fuse, the current through the fuse will exceed the current rating and the fuse will interrupt the electrical connection to the power supply as the fuse elements melt. Thereby, further damage to the circuitry or other upstream or downstream components can be prevented. Also, in case of a short circuit, a voltage drop will occur in the power supply system. As the fuse has a short circuit break time, the faulty circuit can be isolated quickly, thereby removing the voltage drop and ensuring a continued operation of other circuits that are supplied from the same electric power supply.
  • Fig 2 illustrates a further embodiment of the fuse 10 to which the explanations given above are equally applicable.
  • the fuse 10 of Fig. 2 comprises five fuse elements 15, three of which are located on the front side of the PCB and two of which are located on its backside (dashed lines).
  • the conductor trace section 11 can thus be divided into the segments 21, 22 and 23 which are located on the PCB front side and the segments 25 and 26 which are located on the PCB backside.
  • Segments 21 and 23 each comprise a connection section 13/14, a fuse element 15 and a cooling section 18.
  • the intermediate segments 22, 25 and 26 each comprise two cooling sections and a fuse element.
  • the segments are connected in series and are located alternately on the front and back sides of the PCB.
  • the cooling pads of neighboring segments overlap and are electrically connected to each other by means of several vias 30.
  • Vias 30 are through holes that pass through the PCB and electrically connect the front to the back side, e.g. by means of electroplating, annular metal rings, rivets or the like.
  • Segment 21 comprises the connection section 13. Its cooling section 18 overlaps the cooling section 18 of segment 25 on the other side of PCB 12. The two overlapping cooling sections 18 are connection by the vias 30 which pass through the PCB 12.
  • connection is thus established from the first connection section 13 to the second connection section 14, the connection comprising the five fuse elements 15 disposed alternately on different sides of the PCB.
  • the fuse can be designed more compact and the breaking capacity can be increased.
  • one side of the PCB may comprise a serial arrangement of such segments (e.g. as in Fig. 1 ), which is connected to a similar arrangement on the other side of the PCB by means of vias.
  • a multilayer PCB may be used in which the conductor trace segment at least partially runs inside the PCB. The leakage of waste products of the molten fuse element may thus be prevented.
  • Fig. 4 schematically illustrates a subsea electronic device 40 which comprises a pressure compensated enclosure 41, e.g. a subsea canister comprising one or more pressure compensators.
  • the enclosure 41 is filled with a dielectric liquid 42, such as oil, in particular transformer oil or silicone oil, or other types of dielectric liquids.
  • the dielectric liquid enables the device 40 to maintain an inside pressure which is equalized to the surrounding water pressure when device 40 is deployed subsea. It can further provide electric insulation and cooling for the electronics disposed in enclosure 41.
  • Electronic component 45 comprises the printed circuit board 12, on which electronic elements, such as integrated circuits, chips, resistors, capacitors and the like can be mounted (not shown).
  • Electronic component 45 may for example be a controller, a communication component, a switching component or the like.
  • the electronic component 45 is supplied with electric power via the fuse 10 which is provided on the PCB 12.
  • Fuse 10 can have any of the above-outlined configurations.
  • the fuse 10 is configured so that it is triggered if a short circuit occurs in the electronic component 45.
  • the fuse layout i.e. the dimensions of the fuse elements and the cooling sections is adjusted so that the fuse elements will melt at a threshold current which is lower than the expected short circuit current.
  • the transformer 43 is electrically separated from the electronic component 45 after the occurrence of a short circuit. Accordingly, damage to the transformer 43, components upstream of the transformer or downstream of the electronic component 45 can be prevented.
  • the fuse limits the damage to electronic component 45, which may otherwise heat up substantially and as a result may be completely destroyed and may pollute the dielectric liquid 42.
  • Fuse 10 may for example be provided on a PCB which is separate from the electronic component 45. It may then be electrically coupled to the electronic component 45, e.g. by means of a connector or the like.
  • the fuse 10 is submerged in the dielectric liquid 42.
  • the dielectric liquid acts as a high resistance path for an arc occurring when the fuse elements melt. Furthermore, the dielectric liquid has a cooling effect which assists in extinguishing the arc. Accordingly, the arc time can be reduced, resulting in a faster circuit break time of fuse 10. Small leakage currents that may remain after the triggering of the fuse do in the present embodiment not matter, as the main objective of the fuse is short circuit protection.
  • the dimension of the fuse elements can be made small compared to the size of the contact sections and the cooling sections, only a limited amount of copper is melting when the fuse blows, so that the pollution of the dielectric liquid 42 with waste products can be kept small.
  • a further possibility is the use of a multilayer PCB in which the fuse elements are provided in an inner layer so as to prevent the escape of any waste products after the triggering of the fuse.
  • FIG. 4 only show exemplary embodiments of the subsea electrical fuse, and that the fuse can be provided in a range of configurations in dependence on the particular application.
  • the features explained above with respect to the figures and the different embodiments of the invention can be combined in other combinations as the ones illustrated.
  • the fuse is compact, easy to produce and can be operated in high pressure environments of more than 100, 200 or even 300 bar.

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EP11155413.5A 2011-02-22 2011-02-22 Elektrische Unterwassersicherung Not-in-force EP2492947B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11155413.5A EP2492947B1 (de) 2011-02-22 2011-02-22 Elektrische Unterwassersicherung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11155413.5A EP2492947B1 (de) 2011-02-22 2011-02-22 Elektrische Unterwassersicherung

Publications (2)

Publication Number Publication Date
EP2492947A1 true EP2492947A1 (de) 2012-08-29
EP2492947B1 EP2492947B1 (de) 2016-09-28

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2838104A1 (de) * 2013-08-12 2015-02-18 Siemens Aktiengesellschaft Unterwassersicherung
EP3016128A1 (de) * 2014-10-30 2016-05-04 Siemens Aktiengesellschaft Unterwasserschmelzsicherungsanordnung
EP3312867A1 (de) 2016-10-19 2018-04-25 Siemens Aktiengesellschaft Elektrische anordnung zur verwendung in einer hochdruckumgebung
US10000260B2 (en) 2013-03-15 2018-06-19 Hadal, Inc. Systems and methods for pressure tolerant energy systems
US10529524B2 (en) 2014-04-30 2020-01-07 Subsea 7 Limited Subsea replaceable fuse assembly
CN114787955A (zh) * 2019-06-25 2022-07-22 Siba保险丝有限公司 熔断导体和熔断器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB329638A (en) * 1928-11-21 1930-05-21 Colin Edward Cruttwell Improvements in or relating to containers, for example, containers enclosing electrically fusible elements, liable to be subjected to relatively large internal fluid pressures
GB1600095A (en) * 1978-03-06 1981-10-14 Trw Inc Apparatus and electronic components thereof for use in a pressurized environment
WO1999012178A1 (en) * 1997-09-04 1999-03-11 Wickmann-Werke Gmbh Electrical fuse element
WO2006032060A2 (en) * 2004-09-15 2006-03-23 Littelfuse, Inc. High voltage/high current fuse
WO2008122309A1 (de) * 2007-04-04 2008-10-16 Osram Gesellschaft mit beschränkter Haftung Doppelseitige platine mit leiterbahnsicherung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB329638A (en) * 1928-11-21 1930-05-21 Colin Edward Cruttwell Improvements in or relating to containers, for example, containers enclosing electrically fusible elements, liable to be subjected to relatively large internal fluid pressures
GB1600095A (en) * 1978-03-06 1981-10-14 Trw Inc Apparatus and electronic components thereof for use in a pressurized environment
WO1999012178A1 (en) * 1997-09-04 1999-03-11 Wickmann-Werke Gmbh Electrical fuse element
WO2006032060A2 (en) * 2004-09-15 2006-03-23 Littelfuse, Inc. High voltage/high current fuse
WO2008122309A1 (de) * 2007-04-04 2008-10-16 Osram Gesellschaft mit beschränkter Haftung Doppelseitige platine mit leiterbahnsicherung

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10000260B2 (en) 2013-03-15 2018-06-19 Hadal, Inc. Systems and methods for pressure tolerant energy systems
US11077921B2 (en) 2013-03-15 2021-08-03 Hadal, Inc. Systems and methods for pressure tolerant energy systems
EP2838104A1 (de) * 2013-08-12 2015-02-18 Siemens Aktiengesellschaft Unterwassersicherung
WO2015022171A1 (en) * 2013-08-12 2015-02-19 Siemens Aktiengesellschaft Subsea fuse
CN105408980A (zh) * 2013-08-12 2016-03-16 西门子公司 海底保险丝
US9508517B2 (en) 2013-08-12 2016-11-29 Siemens Aktiengesellschaft Subsea fuse
US10529524B2 (en) 2014-04-30 2020-01-07 Subsea 7 Limited Subsea replaceable fuse assembly
EP3016128A1 (de) * 2014-10-30 2016-05-04 Siemens Aktiengesellschaft Unterwasserschmelzsicherungsanordnung
EP3312867A1 (de) 2016-10-19 2018-04-25 Siemens Aktiengesellschaft Elektrische anordnung zur verwendung in einer hochdruckumgebung
WO2018072914A1 (en) 2016-10-19 2018-04-26 Siemens Aktiengesellschaft Electrical arrangement for use in a high pressure environment
CN114787955A (zh) * 2019-06-25 2022-07-22 Siba保险丝有限公司 熔断导体和熔断器
CN114787955B (zh) * 2019-06-25 2024-05-03 Siba保险丝有限公司 熔断导体和熔断器

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