1874results about "Contact electric connection" patented technology

Temperature-dependent switch (10) comprising: a switch housing (12) with a lower part (16) and a cover part (18) closing the lower part (16);a temperature-dependent switching mechanism (14) which is arranged in the switch housing (12) and has a movable contact part (30), a bimetallic element (26) and a spring element (24) cooperating with the movable contact part (30), wherein the switching mechanism (14) is configured to switch between a low-temperature position, in which it presses the movable contact part (30) against a contact surface (34) arranged inside the switch housing (12) and thereby establishes an electrical connection between a first electrical external terminal (56) of the switch (10) and a second electrical external terminal (58) of the switch (10), and a high-temperature position, in which it keeps the movable contact part (30) spaced away from the contact surface (34) and thereby interrupts the electrical connection between the first electrical external terminal (56) and the second electrical external terminal (58);and a spacer element (44) which is arranged inside the switch housing (12) between the lower part (16) and the cover part (18); wherein at least one section (42) of the spring element (24) is arranged between the spacer element (44) and the switch housing (12) and is fixed in position by an interaction of the spacer element (44) and the switch housing (12), and wherein at least one section (52) of the bimetallic element (26) is arranged between the spring element (24) and the spacer element (44) and is supported on the spacer element (44) in the high-temperature position of the switching mechanism (14).

A temperature-dependent switch comprising a switch housing, a temperature-dependent switching mechanism, and a spacer element. The temperature-dependent switching mechanism is arranged in the switch housing and comprises a movable contact part, a bimetal element and a spring element. The switching mechanism is configured to switch between a low-temperature state, in which an electrical connection is established between first and second electrical terminals, and a high-temperature state, in which the electrical connection between the first and second electrical terminals is interrupted. The spacer element is arranged inside the switch housing between a lower part and a cover part. At least one section of the spring element is arranged between the spacer element and the switch housing and is fixed in position. At least one section of the bimetal element is arranged between the spring element and the spacer element and is supported on the spacer element in the high-temperature state.

A temperature-dependent switch, including a switching mechanism unit, and a switching mechanism housing including a first base body composed of electrically conductive material. The temperature-dependent switch further includes a switch housing having a second base body composed of electrically insulating material, in which the switching mechanism housing is arranged, wherein the switch housing includes a stationary contact part. The first base body of the switching mechanism housing surrounds the switching mechanism unit from a first housing side, a second housing side opposite to the first housing side, and a housing circumferential side extending between and transversely to the first and the second housing sides. The first housing side includes an opening through which a movable contact part of the switching mechanism unit interacts with the stationary contact part. The second base body surrounds the first housing side and the circumferential housing side of the switching mechanism housing.

The invention relates to a switch assembly and a temple switch, and relates to the technical field of vehicle accessories. The switch assembly includes: a housing; the action reed is movably connected in the shell; the pin comprises an inserting part used for being connected with an external circuit and an abutting part used for being connected with the action reed, and the inserting part is inserted into the shell and extends out of the shell; the linkage rod extends to the outer side of the shell and is movably connected with the shell, and the linkage rod drives the action reed to move under the action of external driving force, so that the action reed is propped against or separated from the propping part of each pin to realize connection or disconnection between the pins; the reset piece is located in the shell, and the reset piece forces the action reed to slide in one direction, so that the action reed always has the trend of moving towards the abutting part or moving away from the abutting part. The circuit has the effects of good contact stability and high switching precision.

The invention relates to a microwave port 2 * 2 matrix switch. The microwave port 2 * 2 matrix switch comprises a main body shell; a first conductor assembly and a second conductor assembly; the coaxial transmission assembly is arranged in the main body shell and located between the first conductor assembly and the second conductor assembly, and the upper end of the coaxial transmission assembly is communicated with one of the first microwave port and the second microwave port through the first conductor assembly. The lower end of the coaxial transmission assembly is communicated with one of the third microwave port and the fourth microwave port through the second conductor assembly. The four ports are integrated together, and the coaxial transmission line is arranged inside to form a 2 * 2 rectangular switch layout, so that when the two ports are communicated, compared with the existing technical means of connecting by using an external coaxial transmission line, the transmission distance between the two ports can be effectively shortened, and the loss is reduced.

The utility model relates to a protection device for an MSD switch, a power battery comprising the protection device and an operation machine comprising the power battery. The MSD switch includes a receptacle formed with a cavity. The protection device comprises a lock frame which is arranged adjacent to the socket and is provided with a lock hole, a retainer which can be locked with the lock frame in a removable manner, and an insulating block which is arranged on the retainer. And the retainer and the insulating block are configured in a way that when the retainer is locked on the lock frame, the insulating block is jointed in the concave cavity. The protection device is simple in structure and assembly, low in cost and high in universality.

The invention relates to the technical field of power distribution switch equipment, in particular to a ring main unit. The ring main unit comprises a box body, the left side wall and the right side wall of the box body are respectively provided with a three-position switch module and a circuit breaker module which are mutually independent, the three-position switch module comprises a three-position module fixing frame and three-position switches which are installed on the three-position module fixing frame side by side in a front-back mode, and the three-position switches are direct-acting three-position switches. The isolating static contact and the grounding static contact are arranged on the upper side and the lower side respectively, the switch moving contact base and the moving contact arranged in the switch moving contact base are located between the isolating static contact and the grounding static contact, and the circuit breaker module comprises a circuit breaker module fixing frame and circuit breakers installed on the circuit breaker module fixing frame side by side front and back. And the moving contact of the circuit breaker moves up and down to open and close. The three-position switch module and the circuit breaker module can realize a bus-side three-position scheme and a line-side three-position scheme through different combination modes, the standardization of the modules is realized, and the universality is improved.

The present invention relates to the technical field of low-voltage electric appliances. Disclosed are an isolating switch closing energy storage mechanism and an isolating switch. The isolating switch closing energy storage mechanism comprises a contact carrier, a contact bridge, an elastic member and an energy storage structure. The contact carrier is slidably assembled in a housing. The contact bridge is movably assembled on the contact carrier. The elastic member is connected to the contact bridge and the contact carrier, and the elastic member is used for driving moving contacts on the contact bridge to move towards fixed contacts. The energy storage structure is used for enabling, when the contact carrier drives the moving contacts on the contact bridge to move towards the fixed contacts, the elastic member to first store energy and then release energy. The energy released by the elastic member can drive the moving contacts to quickly contact the fixed contacts, so that the generation of contact arcs can be reduced, and the contact resistance and temperature between the moving contacts and the fixed contacts can be effectively reduced. Therefore, the degree of contact ablation and wear is reduced, and the electrical life performance of the isolating switch is improved.

The invention relates to the technical field of circuit breakers, and discloses a fast-to-install primary and secondary fusion pole-mounted circuit breaker which comprises an installation frame and a circuit breaker body arranged on the installation frame, and core power electronic components such as an insulated gate bipolar transistor (IGBT) chip and a module are integrated in the pole-mounted circuit breaker body. The mounting rack is used for mounting a circuit breaker body to realize the functions of automatically cutting off a circuit and remote communication when a fault occurs, the mounting rack comprises a clamping assembly and a supporting piece, the supporting piece is used for mounting the circuit breaker body, and the clamping assembly is used for fastening the supporting piece on a telegraph pole. According to the pole-mounted circuit breaker, assembling and wiring of the circuit breaker body are completed on the ground firstly, then the circuit breaker body is rapidly fixed to the telegraph pole through the installation frame, the effect of improving the installation efficiency and reliability of the pole-mounted circuit breaker is achieved, and meanwhile the use flexibility of the installation frame is high.

The invention belongs to the technical field of industrial temperature controllers, and particularly relates to a full-automatic intelligent temperature controller, which comprises a wiring bottom box and an integrated top box, and is characterized in that the wiring bottom box comprises a bottom cover; the integrated top box comprises a top cover, and a temperature acquisition plate is mounted on the top cover; a movable wiring terminal and a fixed wiring terminal are installed in the bottom cover, and the movable wiring terminal and the fixed wiring terminal are respectively connected with the temperature acquisition board. When an electric appliance is short-circuited, the stepping motor drives the rotating disc and the sliding head to rotate, the insulating rod is separated from the moving contact, the moving contact is disconnected from the fixed contact under the action of the spring, then the electromagnet is reversely electrified, the electromagnet and the permanent magnet on the air cylinder repel each other, and the sliding head is separated from the rotating disc; when the temperature of the circuit drops, the stepping motor drives the turntable to rotate through the belt, and the sliding head is separated from the turntable, so that the temperature controller is in a disconnected state when the turntable rotates, and secondary damage of the electric appliance caused by automatic connection of the temperature controller after the temperature drops is avoided.

Provided in the present application are an electric switch and a power distribution system. The switch comprises an insulating housing and an internal element; the insulating housing comprises a first cavity and second cavities for accommodating a switch system; connection ends of the switch are arranged at two ends of the second cavities respectively; the first cavity and the multiple second cavities are arranged in a vertically stacked mode; the vertical axes or central axes of connection devices of the connection ends corresponding to different phases or poles are coaxial or non-coaxial; a moving contact is driven by a control mechanism to rotate or / and move.

The utility model belongs to the technical field of pole-mounted circuit breakers, and relates to an external capacitor electricity-taking type deep fusion pole-mounted circuit breaker, which is characterized in that adapter brackets are arranged on two sides of a pole-mounted circuit breaker body in the length direction, and capacitor electricity-taking devices are arranged above the adapter brackets; an outer wire conducting rod on the capacitor electricity taking device wire outlet side of the capacitor electricity taking device is connected with one end of a connecting copper bar through a nut, the other end of the connecting copper bar is connected with an upper wire outlet side copper bar terminal through a first bolt, the upper wire outlet side copper bar terminal is installed on a solid-sealed polar pole conducting rod of the solid-sealed polar pole through a second bolt, and the connecting copper bar is of a bent structure. The secondary wiring side of the capacitor power taking device is provided with a power taking device end three-core aviation plug, one side of the pole-mounted circuit breaker body is provided with a body end three-core aviation plug, and the body end three-core aviation plug is connected with the power taking device end three-core aviation plug through an aviation socket and a plug. The pole-mounted circuit breaker is simple to process and low in cost, the reject ratio of finished products can be reduced, and the accident that the pole-mounted circuit breaker is burnt by high temperature is avoided.

The utility model relates to a thermal protector which is fast in disconnection and strong in bearing capacity. The thermal protector is mainly used for over-temperature rise and over-current protection of a refrigeration compressor or other motors. The heating device comprises a pin, a cover plate, a movable contact spring, a bimetallic strip, a first static pin, a second static pin, a heating body, a third static pin and a base, the two ends of the heating body are welded to the first static pin and the second static pin respectively, one end of the movable contact spring is electrically connected with the first static pin, the other end of the movable contact spring is matched with the third static pin, the pin is electrically connected with the third static pin, and the bimetallic strip is arranged on the base. The heating device is structurally characterized in that a loading cavity used for installing the heating body is formed in the base, a limiting table used for placing the heating body is arranged at the bottom of the loading cavity, the heating body is a spiral heating body or a planar heating body, and when the heating body is the spiral heating body, the limiting table is of a plurality of semicircular protruding structures. When the heating body is a planar heating body, the limiting table is arranged to be of a structure with two strip-shaped protrusions.

The invention relates to the field of fuses, discloses a self-closing type intelligent fuse, and solves the problems that an existing drop-out fuse needs to frequently replace a fuse wire, the operation is tedious, an insulating knob insulator of the drop-out fuse is inconvenient to clean, and the operation and maintenance difficulty and workload are large. The device comprises a fuse porcelain column, a conductive barrel, a sleeve disc, a connecting frame, a sliding frame, an arc-shaped frame, a rotating ring, a cleaning brush and circular rings, a first driving assembly is arranged between the two circular rings, the first driving assembly is used for driving the arc-shaped frame to clamp and sleeve the conductive barrel for opening and closing, and when the first driving assembly continues to drive the conductive barrel to rotate away from the fuse porcelain column in the opening state, the rotating ring is driven to rotate. The two circular rings are synchronously driven to be away from each other so as to drive the cleaning brush to rotate to be attached to the surface of the fuse knob insulator, and a second driving assembly is arranged on the sleeve disc and used for driving the circular rings to rotate. The fuse can realize intelligent and automatic switch-on and switch-off, is convenient to clean, operate and maintain, and is good in cleaning effect.

The invention relates to the technical field of thermal protectors, in particular to a thermal protector with a protection structure, which comprises a thermal protector body and two wires, the thermal protector body is sleeved with a shell, the front end of the shell is provided with a front cover, the front cover is provided with a pre-tightening opening, and the section of the pre-tightening opening gradually retracts from the inside of the front cover to the outside of the front cover. The outer portions of the wires are fixedly sleeved with pre-tightening parts matched with the inner shapes of the pre-tightening openings, when the wires move towards the outer portion of the front cover, the pre-tightening parts move along with the wires and abut against the inner walls of the pre-tightening openings, and a first clamping block capable of clamping the outer portions of the two wires at the same time is arranged at the center of the side, away from the pre-tightening openings, of the inner portion of the front cover. A linkage mechanism is arranged between the first clamping blocks and the pre-tightening part, when the pre-tightening part moves outwards along with the wire, the linkage mechanism drives the two first clamping blocks to clamp the outer portion of the corresponding wire at the same time, and the stability of the thermal protector body in use is further improved through mutual cooperation of the pre-tightening part, the first clamping blocks and the linkage mechanism.

The utility model discloses a wake-up conduction structure used on a key switch, comprising a guide core, a moving plate which is arranged on the side edge of the guide core and is elastically bent downwards as a whole, and a static plate arranged below the moving plate, at least one convex edge is formed on the side edge of the guide core, the moving plate comprises at least one moving plate support arm which transversely extends towards the convex edge, and the static plate is arranged below the moving plate. The movable piece support arm is driven by the protruding edge to be in contact with or separated from the static piece under the acting force that the guide core is pressed by external force, and the movable piece and the static piece are electrically connected with an external circuit. The device can be applied to shaft bodies such as a Hall magnetic shaft and an optical axis, the application range is wide, the conduction structures of the shaft bodies such as the Hall magnetic shaft and the optical axis are awakened to realize signal transmission when the device is pressed, the conduction structures of the shaft bodies such as the Hall magnetic shaft and the optical axis are not interfered when the device is not pressed, and the shaft bodies such as the Hall magnetic shaft and the optical axis enter dormancy; therefore, the purpose of saving the electric quantity of the wireless keyboard is achieved, power consumption is reduced, the service life of the wireless keyboard is prolonged, and people can use the wireless keyboard conveniently.

The utility model discloses a primary and secondary fusion complete column-mounted circuit breaker and a conductive column structure thereof, and relates to the technical field of column-mounted circuit breakers, the conductive column structure comprises a third conductive column and an insulating column, the insulating column comprises a first insulating column and a second insulating column connected to the lower end of the first insulating column through a spring, and the lower end of the first insulating column is provided with a guide column. A blind hole is formed in the upper end of the second insulating column, a guide sleeve is arranged at the bottom of the blind hole, and the guide column is arranged in the guide sleeve in a sliding fit mode; the runner is arranged on the side wall of the guide sleeve, an orifice at one end of the runner is positioned at the bottom of the inner side of the guide sleeve, and an orifice at the other end of the runner is positioned on the upper end surface of the guide sleeve; the one-way valve is used for controlling fluid in the flow channel, the control is that the one-way valve allows the fluid in the guide sleeve to flow out through the flow channel, the pole-mounted circuit breaker comprises the conductive pole structure, and according to the scheme, the opening time of the pole-mounted circuit breaker can be effectively shortened, and the opening response speed is increased.

Provided is a switch panel. A connecting base includes a first connecting arm, and a number of the first connecting arm is two; a reset assembly includes a swing piece, a connecting shaft and a reset piece; the swing piece includes a first swing portion and a second swing portion, the first swing portion is arranged between the two first connecting arms and is provided with a strip-shaped through hole extending towards the second swing portion, and the second swing portion is arranged at an end of the first swing portion away from another reset assembly; the connecting shaft rotatably penetrates through the strip-shaped through hole and is connected between the two first connecting arms, the reset piece is sleeved outside the first swing portion, and two ends of the reset piece are pre-compressed to abut against a position between the connecting shaft and the second swing portion.

The utility model provides an electric appliance switch fixing structure, belongs to the technical field of electric appliance switches, and aims to solve the problem that a plurality of electric appliance switches are generally mounted on a mounting plate of a conventional electric cabinet and need to be independently fixed, so that the operation is relatively tedious. Comprising an installation fixing plate, an installation guide rail piece, an adjustment limiting sliding groove, an electric appliance switch body, a limiting jack, an adjustment limiting sliding block, a fixing locking mechanism and an adjustment protection mechanism. The mounting guide rail piece is welded in front of the mounting fixing plate; the adjusting and limiting sliding grooves are formed in the inner sides of the installation guide rail pieces correspondingly. The limiting jack is arranged behind the electric appliance switch main body; the adjusting and limiting sliding blocks are connected to the interiors of the adjusting and limiting sliding grooves in a sliding mode. The fixing and locking mechanism is arranged in front of the adjusting and limiting sliding block. The adjusting protection mechanism is arranged on the outer side of the installation fixing plate, unified fixation of the electric appliance switches is achieved, fixation of the electric appliance switches is facilitated, and the installation efficiency of the electric appliance switches is improved.

The utility model relates to a hitching type fuse disconnecting switch, which comprises a base, a fuse link and an upper cover which is arranged on the base and can be opened or closed, a power connection part which is suitable for being matched with contact knife parts at two ends of the fuse link and a wiring part which is connected with an external cable are respectively arranged on the base, and the fuse link is connected with a clamping piece. The upper cover is respectively provided with a limiting installation part and a guide warping plate, the limiting installation part and the guide warping plate are matched with each other and form a limiting assembly cavity, and a clamping part on the fuse link slides into the limiting assembly cavity from one side of the guide warping plate during assembly and is limited and installed in the limiting assembly cavity. The mounting structure has the effect of facilitating quick mounting or quick dismounting and maintenance.

A pluggable ultrathin mechanical keyboard switch, comprising a base, a balance frame assembly, a conduction member, and a driving rod, and further comprising a fixing plate arranged in parallel with a PCB, and snap-fit blocks respectively arranged on two sides of the base. Snap-fit fasteners corresponding to the snap-fit blocks and extending upwards are respectively provided on two sides of the fixing plate; the snap-fit blocks are snap-fitted to the snap-fit fasteners, so as to fix the base to the fixing plate; the driving rod is provided with a conduction hook; the conduction member is a conductive elastomer; a fixing part is provided in the middle of the metal elastomer; a first elastic arm and a second elastic arm extend from the fixing part to two sides, respectively; a conduction driving part is provided on an end portion of the first elastic arm; a conduction fixing part is provided on the second elastic arm; and the conduction driving part extends to a position above the conduction hook, so as to realize linkage with the driving rod. The present invention achieves good contact stability, convenient and rapid internal structure mounting, free plugging and removal, easy replacement, accurate conduction and disconnection actions, good elastic recovery, a low overall height, good balance, a light weight and a small thickness, thereby satisfying the use requirements of different people.

Provided are a contact system, a contact unit and a circuit breaker. The contact system includes a moving contact assembly arranged in a shell and a pair of static contact assemblies. The moving contact assembly includes an arc isolation portion which is assembled rotatably. The arc isolation portion is provided with a contact groove inside. A pair of moving contact portions are arranged in the contact groove. Each static contact assembly includes a static contact portion which extends into the contact groove. The arc isolation portion rotates and drives the pair of moving contact portions to be in contact with or separated from the static moving portion in the contact groove. An edge of the arc isolation portion is also provided with a pair of mounting grooves which are communicated with the contact groove, and each mounting groove is at least reserved with a notch for the static contact portion to be placed at one end surface of the arc isolation portion. According to the present invention, when the contact system is assembled, the static contact portion of the static contact assembly is arranged correspondingly from the notch and can be placed in the contact groove at an appropriate angle without lifting the static contact portion, which simplifies the step of assembling the contact system, is convenient in operation, can achieve automatic assembly and is conducive to reducing the cost.

Sensor assembly (26) for a switchgear connector (1), the sensor assembly (26) comprising: a high voltage side (28) facing the switchgear; a low voltage side (30); an isolation barrier (32) that provides a galvanic isolation between the high voltage side (28) and the low voltage side (30); a sensor device (34) configured to measure at least one physical quantity and a sensor data output device representative of the at least one physical quantity, the sensor device (34) being arranged on the high voltage side (28); a data interface (36) arranged on the low voltage side (30) and configured to provide for the sensor device data (40) to be accessible from outside of the sensor assembly (26); and a transmission path (42) which is configured to transfer sensor device data (40) between the sensor device (34) and the output interface (36); wherein the transmission path (42) comprises a wireless section which extends across the isolation barrier (32).

The utility model relates to the technical field of power switches, and discloses a power switch wire fixing structure which comprises a power switch box body and a switch cover connected with the top of the power switch box body, a wiring assembly is arranged in the power switch box body, a bottom groove is formed in the bottom of the power switch box body, and the switch cover is connected with the power switch box body. A wire inlet communicated with the interior of the power switch box body is formed in the bottom groove, two sets of connecting assemblies are arranged on the inner side of the power switch box body, and detachable wire fixing assemblies are arranged on the two connecting assemblies; a positioning assembly communicated with the interior of the power switch box main body is arranged in the bottom groove; according to the utility model, the power line is fixed inside the power switch box body, thereby avoiding loosening or winding of the power line, ensuring stable circuit connection, and reducing potential safety hazards such as electric leakage and short circuit; the power line is fixed inside the power switch box body and is prevented from loosening or winding, stable circuit connection is ensured, and potential safety hazards such as electric leakage and short circuit are reduced.

An adjustable and changeable modular control panel includes a supporting dock, and at least one control unit. The supporting dock includes a main connecting member, and a plurality of receiving areas. Each of the receiving areas has a first connector, and a plurality of first positioning portions. The first connector of the receiving area is electrically connected to the main connecting member. The at least one control unit is mated with one of the receiving areas. Each of the control units has a control switch on its top side. The bottom side of each of the control units has a second connector, and a plurality of second positioning portions. The control switch is electrically connected to the second connector. The second connector is selectively mated with the first connector. The second positioning portions can be correspondingly located on the first positioning portions.

A battery power disconnect apparatus is disclosed. According to one aspect of the present invention, the battery power-off device comprises: a lower case including an installation space, the upper part of which is open and which is formed along a longitudinal direction, i.e., a first axial direction, and a storage space, the upper part of which is open and which is formed along a longitudinal direction, i.e., a second axial direction; the electronic device includes an installation space, a storage space formed to be separated from the installation space by a partition wall and adjacent to the installation space in a second axial direction, a plurality of relays individually installed in the installation space, a circuit board installed in the storage space through an open upper portion of the storage space, and a control unit installed in the storage space. A lower case including an external connection terminal for electrically connecting to the outside, and an upper case coupled to the lower case so as to be able to cover an open upper portion of the mounting space and an open upper portion of the receiving space; the circuit board is installed in the accommodating space and is configured to be perpendicular to the bottom surface of the accommodating space.

The utility model discloses a quick-action switch, which comprises a shell, a push rod, a static contact and a movable contact, the push rod is movably arranged in the shell, the outer end of the push rod penetrates through the shell and extends out of the shell, the static contact is arranged in the shell, the inner end of the push rod is provided with a mounting base, and the mounting base is arranged on the shell. Through the arrangement, the mounting base is firstly arranged at the tail end of the push rod, and then the conducting strips are arranged on the upper side and the lower side of the mounting base, so that the moving contact assembly with high bending resistance is formed, the function of preventing the conducting strips from being bent and deformed is achieved, and the effect of enhancing stability is achieved.

The invention relates to an isolation mechanism on a solid cabinet, which relates to the technical field of isolation mechanisms and comprises an insulating shell, a breaking assembly located in the insulating shell and a control assembly located on the vertical side of the insulating shell. A plurality of first binding posts are fixedly arranged on the bottom side of the insulating shell in the horizontal direction, and a plurality of second binding posts are fixedly arranged on the top of the insulating shell in the vertical direction. A supporting plate is fixedly arranged on the bottom side of the insulating shell, vertically upward protection plates are fixedly arranged on the two opposite edges of the supporting plate, and the side faces, close to each other, of the two protection plates abut against the two opposite vertical side faces of the insulating shell. Extension plates are detachably installed on the edges, away from the supporting plate, of the two protection plates in the vertical direction, cover plates located above the second binding posts are fixedly arranged on the upper side faces of the two extension plates in the horizontal direction, and the side faces, close to each other, of the two cover plates can abut against each other. According to the upper isolation mechanism, in the transportation process, the risk that the first binding post and the second binding post are damaged in the transportation process is reduced.

Systems, apparatuses, and methods are described for electrical switching. In some examples, electrical switching is performed by a plurality of switching arrangements. The plurality of switching arrangements may be connected in parallel to one another.