53results about How to "Strong short circuit resistance" patented technology

The invention discloses a direct-current relay capable of resisting short circuit current and extinguishing arc. The direct-current relay comprises two static contact leading-out ends, a straight sheet type movable contact spring and a push rod part, , and further comprises a fixed upper yoke, a follow-up upper yoke and a lower armature. The fixed upper yoke is fixed above the push rod part corresponding to the position between the two movable contacts of the movable contact spring, the follow-up upper yoke is fixed in the push rod part corresponding to the position above the movable contact spring, and the lower armature is fixed on the bottom end surface of the movable contact spring corresponding to the position; the fixed upper yoke, the follow-up upper yoke and the lower armature arerespectively distributed along the width of the movable contact spring, and two magnetic conductive rings are formed on the width of the movable contact spring. The electromagnetic attraction force can be increased, so that the short circuit resistance of the product is greatly improved, and the short circuit resistance current reaches the level of 16 kA.

The invention provides a small-sized transformer. The small-sized transformer comprises an iron core, a winding, a framework, an upper bracket, a lower bracket, a wiring terminal and a protective cover, wherein the winding is wound on the framework, the framework sleeves and is used in cooperation with the iron core, the upper bracket is bent, covers the upper surface of the iron core, and is fixed with screws penetrating the upper bracket forward and backward, the wiring terminal is fixed to the upper bracket through screws on the top surface, wires drawn from the framework are connected to the wiring terminal located on the top, the upper surface of the wiring terminal is also covered with the protective cover, the lower bracket is fixed to the bottom of the iron core through screws, andfixing holes are formed in bending surfaces. The small-sized transformer has the advantages of simple structure, small size, low power consumption, easy heat dissipation and strong short-circuit resistance and is suitable for a wide range of applications.

The invention provides a 10KV oil-immersed transformer. The 10KV oil-immersed transformer comprises an oil tank, an iron core, windings, insulating sleeves and an oil temperature measuring device. Transformer oil for cooling and insulating the windings is arranged in the oil tank. A high-permeability crystal orientation cold rolling silicon sheet is adopted in the iron core. The iron core is a core-type iron core. The windings are each of a multilayer cylinder type structure. The oil tank is provided with a conservator for storing and replenishing oil for the oil tank. The conservator is a capsule type conservator. The oil temperature measuring device is arranged at the top of the oil tank. The oil tank is provided with a pressure relief valve. The side wall of the oil tank is a corrugated wall. Dust is sprayed to the surface of the oil tank, and a film is painted to the surface of the oil tank so that an outer protective layer can be formed. The 10KV oil-immersed transformer is low in cost, easy to maintain, good in heat dissipation, high in overload capacity and wide in adaptive environment. It is guaranteed that oil does not need to be replaced when the oil-immersed transformer normally runs, the maintenance cost of the transformer is greatly reduced, and meanwhile the service life of the transformer is prolonged.

The invention relates to a low-voltage welding transformer and an operation method thereof. The low-voltage welding transformer comprises two groups of transformer winding components which are the same in structure, and each transformer winding component comprises an iron core, a primary winding and a secondary winding, wherein each primary winding and the corresponding secondary winding are arranged outside the corresponding iron core; primary windings in the two groups of transformer winding components are in series connection, and each primary winding is coupled with the corresponding secondary winding in the transformer windings; two circuits of output ends are led out of two secondary windings; the two circuits of output ends led out of the two secondary windings respectively are connected correspondingly, so that the series connection output or parallel connection output of the two secondary windings is formed.

The invention discloses a membrane-packaged rectangular stranded conductor and a manufacture method. The method comprises the following steps: 1) membrane-packaged conductors are formed by packaging single circular aluminum wire with polyester film; 2) a plurality of film-packaged conductors are stranded together and shaped into rectangular sectional planes, wherein, the conductors leastways comprise two layers of many circular aluminum wires, and the length of each conductor is basically equal to resistance; 3) the stranded conductors with rectangular sectional planes are impregnated with a thermoplastic resin adhesive groove so that thermoplastic resin adhesive is full filled with apertures among each single circular aluminum wire and all the single circular aluminum wires are adhered together; 4) insulation materials are full packaged outside of the stranded conductors with rectangular sectional planes, wherein, the stranded conductors are impregnated with the thermoplastic resin adhesive groove, so that the resin adhesive is packaged; and 5) polyester non-woven fabric is selectively laid outside of the full packaged insulation materials, and the apertures among each single circular aluminum wire are filled with thermoplastic resin adhesive and solidified by baking after coiling reactor winding.

This invention relates to a 220kv single-phase railway traction transformer structure composed of an iron core, a high voltage coil and a low voltage coil, in which, the voltage of the head and tail of the high voltage coil is 220kv connecting to 220kv network directly, both of the head and tail apply the interleaved equal turn winding, other line segments are in continuous winding, the outlet of the tapping is set vertically to the 1/2 part of the high voltage coil.

The invention discloses an intelligent dry-type transformer and production process thereof. The intelligent dry-type transformer comprises bases, transformers and an upper rack, wherein a cushion block, a draught fan, bidirectional wheels and grounding screws are arranged on the bases, the transformers are fixedly connected to the cushion block, high-voltage connection pieces, high-voltage connection rods, high-voltage taps and high-voltage connection pipes are arranged on side surfaces of the transformers, each transformer internally comprises a cooling air duct, a high-voltage coil, a low-voltage coil and an iron core, upper ends of the transformers are fixedly connected with the upper rack, and a clamping piece, high-voltage terminals, hanging rings and low-voltage outgoing line copper plates are arranged on the upper rack. The intelligent dry-type transformer has favorable performance such as fire resistance, does not contain flammable resin, also does not contain toxic gas, and also has the characteristics of flame retardance and self extinguishing; and the intelligent dry-type transformer has the advantages of low energy consumption, low noise, no pollution, no maintenance, good insulation property, no local discharge, high lightning impulse resistant capability, high mechanical strength, temperature change resistance, high short-circuit resistant capability and humidity resistance, and can run under high humidity.

The invention provides a composite amorphous transformer core. Three individual rectangular core frames are arranged; each core frame is formed by compounding two materials, namely an amorphous alloy and oriented silicon steel in an overlapping manner; three rectangular cores are butted to form a three-dimensional triangular structure; the structure is three-phase symmetrical; three-phase magnetic circuits are equal and the shortest; a transformer is excellent in performance, low in noise and high in anti-short-circuit ability; the core is compact in structure; the transformer is small in size and light in weight; and the weight of the core is only about 2/3 that of an amorphous core with a conventional structure, so that the product cost can be greatly reduced.

The invention relates to a photoelectric transmission isolation power supply. The photoelectric transmission isolation power supply comprises a transmitting end unit, a light path straightener and a receiving end unit. The transmitting end unit is used for obtaining a power signal from an external power supply and converting the power signal into an optical signal. The optical path straightener isused for straightening optical signals and transmitting the straightened optical signals. And the receiving end unit is used for receiving the straightened optical signal, converting the optical signal into an electric signal and providing for a load. The transmitting end unit comprises an isolation transformer, a light-emitting source and an AC/DC light-emitting power management circuit which isused for carrying out AC/DC conversion and managing the light-emitting efficiency of the light-emitting source. The optical path collimator comprises a collimating mirror. The receiving end unit comprises a photoelectric converter and a DC/AC or DC/DC load management circuit used for carrying out DC-AC conversion or DC conversion and managing loads. The receiving end unit further comprises a communication module used for feeding back the working condition of the load to the input module. Light serves as an energy transmission medium, the transmission distance is long, the insulation withstandvoltage stress is high, and the advantages of being high in short-circuit resistance, safe and reliable in operation and the like are achieved.

The invention relates to a novel transformer. Structural advantages of an existing shell-type transformer and an existing core-type transformer are integrated, so a shell-type transformer and a core-type transformer can be completely replaced. The cost is greatly reduced, and the percent of pass of sudden short circuit tests is theoretically 100%. A transformer winding is good in cooling effect, high in overload capacity, large in limit capacity and convenient to transport, and the limit capacity is superior to that of a shell type transformer. When vertical transportation is inconvenient, thetransformer body can be transported horizontally, and the transportation height is reduced. The capacitor is compact in structure, small in appearance size, light in overall weight, uniform in capacitor distribution, reliable in insulation and high in lightning stroke resistance and operation overvoltage resistance, and leads are convenient to install.

The invention discloses a 35KV novel shell type power transformer body structure which is composed of main components of clamping wood, insulators, windings, a fastening device, an upper frame, iron core skids, iron cores, a lower frame and the like. The iron cores are fixed between the upper frame and the lower frame, the insulators and the windings are combined as required by the technical requirement and installed on the lower frame, and the clamping wood is fixed between all phases of insulators and windings. The insulators are of a triangular structure, and the windings are of a cake type structure. The 35KV novel shell type power transformer body structure has the advantages that due to combination of the insulators, the windings, the frames and the iron cores, on the basis of the principle of electricity and magnetism, the problems that a shell type power transformer is high in cost and a performance index can not be met are solved, and the 35KV novel shell type power transformer body structure has the advantages of being low in cost, low in losses, little in short-circuit impedance, safe, reliable and strong in short-circuit-resistant capacity.

The invention discloses a motor type high-voltage direct-current relay. The motor type high-voltage direct-current relay comprises a casing, wherein a movable contact assembly, a stationary contact assembly and a drive assembly are arranged in the casing; the movable contact assembly comprises a movable contact spring which is fixed with the upper end of a push rod, and a rack is fixed at the lower end of the push rod; the drive assembly comprises a motor, an output shaft of the motor is in linkage with the rack through a worm, and the axis of the worm is parallel to the axis of the push rod.

The invention relates to a novel distribution transformer, which combines the structural advantages of the existing shell-type transformers and core-type transformers and can completely replace the existing distribution transformers. The cost is greatly reduced, and the passing rate of burst short circuit test is basically 100%. The windings of the transformer have a good cooling effect and strongoverload capability. The transformer has large limit capacity and is convenient to transport. The advantage in ultimate capacity is superior to that of the shell-type transformer. When vertical transportation is inconvenient, the transformer can be inverted for transformation to reduce the height of transportation. The transformer has the advantages of compact structure, small size, low overall weight, compact structure, easy lead installation, uniform capacitance distribution, reliable insulation, and strong lightning resistance and switching overvoltage capability.

The invention discloses a novel distribution transformer. Structural advantages of an existing shell-type transformer and an existing core-type transformer are integrated, so an existing distributiontransformer can be completely replaced. The cost is greatly reduced, and the percent of pass of sudden short circuit tests is basically 100%. The transformer winding is good in cooling effect, high inoverload capacity, large in limit capacity and convenient to transport. The limit capacity is superior to that of a shell type. When vertical transportation is inconvenient, inverted transportation can be achieved, and the transportation height is reduced. The distribution transformer is compact in structure, small in appearance size, light in overall weight, uniform in capacitor distribution, reliable in insulation and high in lightning stroke resistance and operation overvoltage resistance, and leads are convenient to install.

The invention relates to a 500kV radial split transformer. The 500kV radial split transformer is provided with an oil tank main body, a high-voltage sleeve, a low-voltage sleeve, an oil storage cabinet, a heat sink, an on-load tap switch and a high-voltage outgoing line box, wherein the oil tank main body is formed from an upper section of oil tank and a lower section of oil tank, an arrangement structure of iron cores, a voltage stabilization coil, a low-voltage coil I, a high adjustable coil, a high-voltage coil and a low-voltage coil II are arranged in a transformer body, the iron cores are arranged in the upper section of oil tank and the lower section of oil tank, the voltage stabilization coil, the low-voltage coil I, the high adjustable coil, the high-voltage coil and the low-voltage coil II sleeve each iron core, a high-voltage neutral point is used for adjusting a voltage, an external winding radially gets out, the other windings get out of an upper end part and a lower end part, and meanwhile, a high-voltage end is connected with a tail end of the high-voltage sleeve through a copper weaving line. By the 500kV radial split transformer, the problem of relatively large split coefficient can be solved, the product is relatively simple in structure, high in short-circuit resistant capability and safe and reliable in performance, and long-term qualified running can be fully ensured.