33results about How to "Small transition resistance" patented technology

A cable lug device (300) and connection terminal (100) having a cable lug device (300), the connection terminal having a conductor receptacle (115), a clamping device (101) and a current bar receptacle (110a). On the connection terminal is provided a cable lug device (100) having a cable lug body (301) and, provided thereon, a cable receptacle (302) for fastening a connection cable (303). The cable lug body (301) has a current bar (310) that is inserted in a current bar receptacle (110a) of the connection terminal (100) and serves there as a current bar (110) for contacting a conductor (126).

The invention relates to a calculation method of short-circuit current contributed by an alternating-current system during the direct-current fault of a multi-end alternating current / direct current hybrid distribution network. The method includes the following steps that: 101, a post-direct-current inter-pole short-circuit fault equivalent circuit of the alternating current / direct current hybrid distribution network is provided according to the characteristics of fault current and contribution made by the alternating-current system to the fault current after an inter-pole short-circuit fault of a direct-current line occurs, wherein the equivalent circuit is composed of an alternating-current voltage source 301, an alternating-current system equivalent resistor 302, an alternating-current system equivalent inductor 303, a converter station direct-current side capacitor 206, direct-current line resistors 304 and 306, and direct-current line inductors 305 and 307; 102, an analytical expression of the short-circuit current contributed by the alternating-current system is derived according to the analysis of the step 101; and 103, the calculation method of the short-circuit current contributed by the alternating-current system during the direct-current fault of the multi-end alternating current / direct current hybrid distribution network is provided according to the analysis of the step 102, the steady-state average value, transient peak value time and transient peak value of the method are calculated.

The invention relates to a contact-making and connection arrangement on the basis of film conductors introduced in a housing, wherein ends of the film conductors have a contact-making section and at least partly lie one above another. According to the invention, a double-sided self-adhesive or adhesive-coated conductive nonwoven material is situated between the contact-making sections facing one another, said material mechanically and electrically connecting the ends of the film conductors. Furthermore, the housing is embodied such that it is divided in the plane of the film conductors that have been introduced or are to be introduced, wherein the housing parts form half-shells and, in at least one half-shell, stamp-like projections are provided which lead to a deformation of the contact-making layer in such a way that a reduction of the electrical contact resistance of the connection occurs.

The invention discloses a method for manufacturing a steel-aluminum composite conductor rail, comprising the following steps of: a) preparing an aluminum rail: preparing an I-shaped aluminum rail by a mould through hot extrusion molding, wherein the two side surfaces of the upper end of the aluminum rail are provided with grooves; b) prefabricating a C-shaped stainless steel strip: cutting a stainless steel coil into stripy stainless steel strips, and cold bending and rolling by a cold bending unit to form a stainless steel strip with a C-shaped section, wherein the formed stainless steel strip comprises a base part, a first bending part, a second bending part and a clip part, the first bending part is formed by extending from the two sides of the base part and bending downwards, the second bending part is formed by extending from the first bending part and bending inwards, and the clip part is formed by extending from the second bending part; and c), compounding the C-shaped stainless steel strip and the aluminum rail, wherein the clip parts at two ends of the C-shaped stainless steel strip are embedded in the grooves on the two sides of the upper end of the aluminum rail, and the C-shaped stainless steel strip is completely attached to the upper part of the aluminum rail. According to the method in the invention, the stainless steel strip and the aluminum rail are closely combined, the combined surface is large, the transition resistance is small, deformation is not liable to occur after forming, a local heating mode is adopted during rolling compounding to facilitate forming, machining is not needed after rolling forming, and the production efficiency is greatly improved.

The system (10) has input device (20) comprising input terminal (32) and ground terminal (34). An input circuit (70) is connected between input terminal and ground terminal for detecting an input signal. A sensor device (100) is connected to input terminal, and is optionally connected to ground terminal. A supply voltage source (40) is provided for supplying the sensor device with energy. A switched current increasing unit (80) is connected to input terminal and ground terminal, to supply high current to input circuit as a function of applied voltage for adjustable time period.

The invention discloses a fast line selection method for a single-phase grounding fault in a small current grounding system. First, the instantaneous value of the three-phase current at the outlet of each feeder line in the substation is collected in real time; secondly, according to the instantaneous value of the current, the instantaneous value of the zero-sequence current of the line is calculated, and the second-order derivative of the instantaneous value of each zero-sequence current is obtained by interpolation method; then, Taking the fault occurrence time as the zero time, find out the maximum value and minimum point of the second order derivative of the zero-sequence current instantaneous value of each line within 3ms; finally, find out the characteristic quantity of the zero-sequence current change trend of each line, and find out the maximum characteristic quantity , that is, it is judged that the line is a faulty line. The method of the invention is less affected by line length, transition resistance and arc suppressing coil, and can quickly select a single-phase grounding fault line.

The invention relates to the monitoring of support mechanisms in elevator installations. Specifically, it relates to a bearing mechanism for elevator equipment, which includes a plurality of tension carriers and coverings arranged in parallel to each other. In this case, the tension carrier is surrounded by the sheath, wherein the tension carrier extends along the longitudinal axis of the supporting means. The tension carrier is at least partially exposed from the casing over a section of the longitudinal axis of the carrier. On said section, contact elements for electrical contacting of the tension carrier are permanently fastened to the tension carrier. Furthermore, it relates to an elevator installation, a method for monitoring the state of a tensioned carrier in a support mechanism, and a plug for electrical sampling of the support mechanism.