206results about "Contacts heating/cooling" patented technology

A switchgear cabinet having at least one cabinet door and a fan-assisted air circulation on an interior for cooling heat-generating devices installed inside, which are disposed one above the other in tiers. With particular air circulation, the partial cooling air flows in the tiers and can be set and adjusted, to a large extent independently of one another.

A cooling device for a circuit breaker which comprises a case having a front wall, a rear wall, an upper wall, a lower wall, two flanks, and a first series of side-by-side terminals and a second series of side-by-side terminals that protrude outside from the case for the connection of the circuit breaker with an electrical circuit. The cooling device includes at least one first body made of a thermal conducting material and which has a central portion suitable for being positioned transversally along and facing the first series of terminals so as to absorb heat generated at the first series of terminals, and a first end portion and a second end portion that protrude from the central portion and are configured so as to receive the heat absorbed by the central portion and to diffuse it outside the cooling device itself.

To provide a power supply relay controller and an electric power steering apparatus capable of appropriately preventing contact failure of relays. When abnormal conduction between relay contacts occurs, a power supply relay circuit is opened and closed while a predetermined potential difference is applied between the relay contacts. At this time, an operation for turning on the relay contacts is performed while the charge of an electrolytic capacitor by a precharge circuit is limited. In this way, an ice layer between the relay contacts is removed by thermal energy of an arc that is generated between the contacts by a potential difference between the relay contacts.

An electrical connector includes a housing that extends between a front and a rear. The housing has a chamber at the rear. The housing has a terminal channel between the front and the rear. A terminal is coupled to the housing. The terminal includes a mating pin at a front of the terminal and a cable connector at a rear of the terminal. The mating pin is positioned in the terminal channel for mating with a charging connector. The cable connector is positioned in the chamber at the rear of the housing. A terminal heat exchanger is positioned in the chamber. The terminal heat exchanger is thermally coupled to the cable connector of the terminal. The terminal heat exchanger has a separator electrically isolating the terminal heat exchanger from the terminal.

A MEM relay includes an actuator, a shorting bar disposed on the actuator, a contact substrate, and a plurality of liquid metal contacts are disposed on the contact substrate such that the plurality of liquid metal contacts are placed in electrical communication when the MEM relay is in a closed state. Further, the MEM relay includes a heater disposed on said contact substrate wherein said heater is in thermal communication with the plurality of liquid metal contacts. The contact substrate can additionally include a plurality of wettable metal contacts disposed on the contact substrate wherein each of the plurality of wettable metal contacts is proximate to each of the plurality of liquid metal contacts and each of the wettable metal contacts is in electrical communication with each of the plurality of liquid metal contacts.

The present invention discloses a circuit breaker comprising: a vacuum chamber; a fixed contact and a movable contact disposed in a vacuum chamber; a fixed contact stem supporting said fixed contact in said vacuum chamber and extending outwards from a first end of said vacuum chamber; a movable contact stem supporting said movable contact in said vacuum chamber for reciprocal movement between contact with and separated from said fixed contact, and extending outwards from a second end of said vacuum chamber; a first electrical conductor coupled to said fixed contact stem; a second electrical conductor coupled to said movable contact stem; at least one heat dissipating means disposed for at least one of said fixed contact and movable contact; wherein, the heat dissipating means is hollow and has an external surface and internal surface; a plurality of fins provided on said internal surface constitute a passage through which air is convected in a direction parallel to that of reciprocal movement of movable contact stem.

A device for connecting an electric line to a connection terminal for direct or indirect connection with a circuit breaker, which comprises at least one first electrically conducting body having a first end portion intended to be operatively connected to the terminal, and a second end portion intended to be operatively connected to a conductor element of the electric line, and at least one thermal conducting body comprising a hermetically sealed cavity containing a cooling fluid. The thermal conducting body is operatively coupled to the first electrically conducting body such that the hermetically sealed cavity has a first surface arranged in proximity to the first end portion and a second surface arranged in proximity to the second end portion.

A heat pipe vacuum switch comprises a fixed contact (1), a moving contact (2), a conductive rod and a heat pipe system for cooling. The heat pipe system is comprised of an evaporating pipe, a connecting pipe and a radiator; the evaporating pipe is metallic pipe located in the vacuum arc chute and sleeved at outside of the conductive rod; the space between the evaporating pipe and the conductive rod is liquid storage space; the liquid storage space is filled with cooling liquid; the radiator is located out the vacuum arc chute and is hollow metallic cavity; the connecting pipe is metallic pipe; one end is connected with the evaporating pipe, the other end is connected with the radiator; inner cavities of the connecting pipe, the evaporating pipe and the radiator are communicated. The heat pipe system is simultaneously arranged at one side of the fixed contact (1) and one side of the moving contact (2), or is only arranged at one side of the fixed contact (1) or the moving contact (2).

The invention provides an electric heating deicing device for an electromagnetic switch contact of a starter and belongs to the technical field of automobile power. The device comprises a power supply, at least one heating resistor, at least one temperature sensor, at least one control switch and a control unit, wherein the heating resistor and the temperature sensor are located on the terminal of an electromagnetic switch, the control switch comprises a switch execution part and a control part, one end of the heating resistor is grounded, the other end of the heating resistor is connected with the power supply by the switch execution part, the temperature sensor is connected with the control unit and detects and sends the temperature of the terminal to the control unit, and the control unit is also connected with the control part and an ignition switch, receives the temperature of the terminal, acquires the state of the ignition switch and controls the execution part by controlling the control part after analyzing and processing, so as to further control the heating of the heating resistor on the terminal. The electric heating deicing device can be used for heating the icy electromagnetic switch terminal of the starter, and the problem that a vehicle cannot be started caused by the icy terminal is effectively solved.

The invention relates to a polar armature for surpporting and connecting an arc suppression unit 4 of a breaker 1 in a protective gas. The polar armature is composed of a pole head 2 and/or pole carrier 3, respectively with cooling fins 9 for cooling. In order to improve the cooling effect even though the structure of the breaker 1 is compact, the cooling fins 9 of the pole head 2 and/or pole carrier 3 are separated by 6-13 mm. Their length is 150-250 mm in the gas flow direction. Furthermore, the pole head 2 and/or pole carrier 3 can comprising an exterior delimitation pole 10, the cooling fins 9 arranged inside the pole head 2 and/or pole carrier 3. Another possibility is that the pole head 2 and/or pole carrier 3 form cube along envelope curve thereof.

A circuit breaker according to the present invention includes a terminal switching unit mounted in an enclosure thereof, and the terminal switching unit accommodates, in a base as an outer casing thereof, a fixed contactor and a movable contactor contactable with and separated from each other, a sliding unit rotatably supporting the movable contactor, and a detection mechanism to detect a fault current. Radiators are provided at side portions of at least one of a contact portion where the movable contactor comes in contact with the fixed contactor, the sliding unit and the detection mechanism, each radiator radiating heat to the outside of the base. This may prevent an increase in temperature of the circuit breaker within a limited space without an increase in costs.

An input circuit for a tractor includes one or more switches having open and closed positions, based on operating characteristics of the tractor, and a power transistor drawing a threshold current through the switches during short intervals during which the switch states are sensed by a microcontroller.

A relay cooling device includes a container, a liquid coolant that is stored in the container, and a relay that is immersed in the liquid coolant.

The invention discloses a high-voltage isolation switch with a contact finger function. The high-voltage isolation switch comprises a fastening part, a main body part and a guide-in part and is characterized in that the guide-in part comprises a contact finger seat, contact fingers and a contact, wherein the contact seat is connected with the contact fingers through screws, the guide-in part is of a section of circular arc structure, the upper and the lower contact fingers are in clearance fit with the contact and are not closed with the contact; the surface of the fastening part, matched with the contact finger seat, is a flat surface, and the fastening part and the contact finger seat are fixed with a welding method; and the cross section of the main body part is of a W shape, and a heat radiating groove for radiating heat for the contact fingers is arranged on the cross section of the W-shaped cross section. The self-supported contact fingers in the invention have high through-current capability and high short-circuit current bearing capacity; and a self-cleaning capability is realized between the contact and the contact fingers, so that the maintenance frequency is decreased, the anti-corrosion property of the contact fingers is increased, the heating of a conductive loop is alleviated and the heat radiating capability is enhanced and the high-voltage isolation switch has the characteristics of low cost, safety and reliability.

The invention discloses an intelligent contact of an isolation switch. The intelligent contact comprises a static contact assembly and a moving contact assembly which are matched with each other, and is characterized in that the static contact assembly comprises a first conductive tube, static contact fingers, memory alloy spring pieces and a finger base; the first conductive tube is connected with the finger base; the paired static contact fingers are installed at two sides of the finger base oppositely; the arc-shaped memory alloy spring pieces are arranged at the outer sides of the static contact fingers which are arranged in the paired mode; the moving contact assembly comprises a second conductive tube and a moving contact body; and the moving contact body is connected with the second conductive tube. According to the invention, nickel-titanium shape memory alloy is adopted to replace existing common spring steel pieces, so that a problem that the isolation switch loses efficacy due to overheating of clamping springs is solved fundamentally, thus occurrence of isolation switch heating accidents and large-area power outage accidents is greatly reduced, a large number of manpower and material resources for overhauling and maintaining are saved for the electric power department, and urgent needs of domestic power operation enterprises are met.

A cooling apparatus is provided for a switchgear having at least one primary contact to connect to a terminal of a circuit breaker, with a busbar joint connected to the primary contact. The cooling apparatus includes an evaporator associated with the primary contact. A condenser is located at a higher elevation than the evaporator. Heat pipe structure fluidly connects the evaporator with the condenser. Heat transfer structure is coupled with the busbar joint for removing heat from the busbar joint. Working fluid is in the evaporator so as to be heated to a vapor state, with the heat pipe structure transferring the vapor to the condenser and passively returning condensed working fluid back to the evaporator for cooling the at least one primary contact.