43results about How to "Increase arc length" patented technology

A fault interrupter and load break switch includes a trip assembly configured to automatically open a transformer circuit electrically coupled to stationary contacts of the switch upon the occurrence of a fault condition. The fault condition causes a Curie metal element electrically coupled to at least one of the stationary contacts to release a magnetic latch. The release causes a trip rotor of the trip assembly to rotate a rotor assembly. This rotation causes ends of a movable contact of the rotor assembly to electrically disengage the stationary contacts, thereby opening the circuit. The switch also includes a handle for manually opening and closing the electrical circuit in fault and non-fault conditions. Actuation of the handle coupled to the rotor assembly via a spring-loaded rotor causes the movable contact ends to selectively engage or disengage the stationary contacts.

A fault interrupter and load break switch includes a trip assembly configured to automatically open a transformer circuit electrically coupled to stationary contacts of the switch upon the occurrence of a fault condition. The fault condition causes a Curie metal element electrically coupled to at least one of the stationary contacts to release a magnetic latch. The release causes a trip rotor of the trip assembly to rotate a rotor assembly. This rotation causes ends of a movable contact of the rotor assembly to electrically disengage the stationary contacts, thereby opening the circuit. The switch also includes a handle for manually opening and closing the electrical circuit in fault and non-fault conditions. Actuation of the handle coupled to the rotor assembly via a spring-loaded rotor causes the movable contact ends to selectively engage or disengage the stationary contacts.

The invention discloses a forging method for an elliptical seal head of a CAP1400 steam generator. The forging method comprises the steps of 1) manufacturing a blank; 2) heating; 3) assembling a die; 4) preforming; 5) stamping. By adopting the forging method, when the elliptical seal head with ultra-large size cannot be directly forged, firstly a circular plate blank with smaller diameter is preformed through a forging method of rotary drawing to increase the arc length of a workpiece and form an enough large circular-arc-shaped blank, and then the blank is stamped as a whole body to meet the requirement on the final size of the ultra-large size elliptical seal head. Therefore, the forging method for the elliptical seal head of the CAP1400 steam generator can effectively solve the problem that the large-sized and integrated forged piece of the elliptical seal head of the CAP1400 steam generator is difficult to manufacture.

A fault interrupter and load break switch includes a trip assembly configured to automatically open a transformer circuit electrically coupled to stationary contacts of the switch upon the occurrence of a fault condition. The fault condition causes a Curie metal element electrically coupled to at least one of the stationary contacts to release a magnetic latch. The release causes a trip rotor of the trip assembly to rotate a rotor assembly. This rotation causes ends of a movable contact of the rotor assembly to electrically disengage the stationary contacts, thereby opening the circuit. The switch also includes a handle for manually opening and closing the electrical circuit in fault and non-fault conditions. Actuation of the handle coupled to the rotor assembly via a spring-loaded rotor causes the movable contact ends to selectively engage or disengage the stationary contacts.

A fault interrupter and load break switch includes a trip assembly configured to automatically open a transformer circuit electrically coupled to stationary contacts of the switch upon the occurrence of a fault condition. The fault condition causes a Curie metal element electrically coupled to at least one of the stationary contacts to release a magnetic latch. The release causes a trip rotor of the trip assembly to rotate a rotor assembly. This rotation causes ends of a movable contact of the rotor assembly to electrically disengage the stationary contacts, thereby opening the circuit. The switch also includes a handle for manually opening and closing the electrical circuit in fault and non-fault conditions. Actuation of the handle coupled to the rotor assembly via a spring-loaded rotor causes the movable contact ends to selectively engage or disengage the stationary contacts.

A fault interrupter and load break switch includes a trip assembly configured to automatically open a transformer circuit electrically coupled to stationary contacts of the switch upon the occurrence of a fault condition. The fault condition causes a Curie metal element electrically coupled to at least one of the stationary contacts to release a magnetic latch. The release causes a trip rotor of the trip assembly to rotate a rotor assembly. This rotation causes ends of a movable contact of the rotor assembly to electrically disengage the stationary contacts, thereby opening the circuit. The switch also includes a handle for manually opening and closing the electrical circuit in fault and non-fault conditions. Actuation of the handle coupled to the rotor assembly via a spring-loaded rotor causes the movable contact ends to selectively engage or disengage the stationary contacts.

A high pressure discharge lamp has a pair of electrodes in a discharge tube. Each electrode includes a coil and an electrode rod with a tip, the coil being set around the electrode rod near the tip. The tip of the electrode rod and an adjacent portion of the coil are fused together during the initial discharge. To be more specific, the coil covers the electrode rod near the tip, with the tip of the electrode rod being left uncovered and a length of the tip being DELTAL that satisfies an inequality 1/50*R3<=DELTAL<=1/5*R3 where R3 is an outer diameter of the coil adjacent to the tip. Alternatively, the electrode can be first formed before being set in the discharge tube, by integrally melting the tip of the electrode rod and the adjacent portion of the coil using, for example, a plasma or laser.

A fault interrupter and load break switch includes a trip assembly configured to automatically open a transformer circuit electrically coupled to stationary contacts of the switch upon the occurrence of a fault condition. The fault condition causes a Curie metal element electrically coupled to at least one of the stationary contacts to release a magnetic latch. The release causes a trip rotor of the trip assembly to rotate a rotor assembly. This rotation causes ends of a movable contact of the rotor assembly to electrically disengage the stationary contacts, thereby opening the circuit. The switch also includes a handle for manually opening and closing the electrical circuit in fault and non-fault conditions. Actuation of the handle coupled to the rotor assembly via a spring-loaded rotor causes the movable contact ends to selectively engage or disengage the stationary contacts.

A method of making steel in an electric arc furnace is provided. The method comprises the steps of measuring electrical current in at least two phases of electrical power supplied to electrodes in the furnace during a campaign, establishing a setpoint current level and an input time interval, and switching between modes of inputting exothermic energy into the steel melt when at least two phases have measured current levels below the setpoint for the input time interval.

The invention discloses a method for controlling a furnace condition of a three-phase alternating-current ore smelting furnace. Electrodes are vertically arranged in a hearth of the three-phase alternating-current ore smelting furnace, a burden layer in the hearth is longitudinally divided into a plurality of smelting zones, the smelting zones are insulated from one another, and each smelting zone corresponds to one electrode. The invention further discloses the three-phase alternating-current ore smelting furnace which comprises the electrodes and high-temperature-resistant insulation devices. The electrodes are vertically arranged in the hearth of the three-phase alternating-current ore smelting furnace, the high-temperature-resistant insulation devices are arranged in the hearth, the corresponding burden layer of the hearth is longitudinally divided into the multiple smelting zones by the high-temperature-resistant insulation devices, accordingly, the smelting zones are insulated from one another, and each smelting zone corresponds to the corresponding single electrode. The method and the three-phase alternating-current ore smelting furnace have the advantages that the problem of influence of branch currents of a burden layer on running of an existing three-phase alternating-current ore smelting furnace can be solved by the method and the three-phase alternating-current ore smelting furnace, the stability of the furnace condition can be improved, secondary running voltages of the three-phase alternating-current ore smelting furnace can be increased, electric energy of reaction zones of lower ends of the electrodes can be greatly increased, unit energy consumption of products can be reduced, and the yield of the products can be increased.

Plasma reformer having a high voltage electrode spaced apart from a grounded electrode creating a volume therebetween. At least one electrically floating electrode is disposed between the high voltage electrode and the grounded electrode and a fuel atomizer is disposed to inject a hydrocarbon fuel into the volume. Structure is provided for introducing air into the volume and a high voltage source establishes a high voltage between the high voltage electrode and grounded electrode to create a cascade arc in the volume. The electrically floating electrodes increase the arc length and the discharge volume to create a cascade arc having a combined extended length and increased contact time with an air-fuel mixture for reforming a hydrocarbon fuel.

A surge suppressor with a housing, a varistor located in the housing, an electrically conductive connecting element and at least one isolating interrupter. The isolating interrupter is movable relative to a first terminal of the varistor out of a first position into a second position, in the normal state of the surge suppressor, a first end of the electrically conductive connecting element being connected to the first terminal of the varistor in an electrically conductive manner and the isolating interrupter being held in its first position. When a critical state of the varistor is reached, the isolating interrupter is moved into its second position in which a segment of the interrupter is located between the first end of the electrically conductive connecting element and the first terminal. Reliable disconnection from the power system is ensured by the arc formed being moved into at least one partially closed chamber.

The invention provides an internal high pressure forming die. The shape of a cavity (1) of the die is matched with that of a formed pipe, and grooves (11) are arranged on the inner wall of the cavity (1) and correspond to bent positions of the pipe. When the internal high pressure forming die is used for manufacturing the pipe, as the grooves (11) are arranged on the inner wall of the cavity (1) and correspond to the bent positions of the pipe, projections are arranged at the bent positions of the formed pipe, the arc length of the bent positions of the pipe is increased by the aid of the protections, and further the yield point of the bent positions is improved. Therefore, cracking, creasing and rebounding of the bent positions of the pipe caused by incapability of completely plastically deforming due to non-uniform stress on the pipe are decreased.

The invention relates to a high-voltage DC relay, belonging to the technical field of a relay. The high-voltage DC relay comprises an upper press cover, a shell body, a contact bin, an outer shell, a static contact, a fixed iron core, a movable contact assembly and a framework, wherein the upper press cover is matched with the shell, the contact bin is assembled with the outer shell, the movable contact assembly is arranged on the framework, the contact bin is assembled on the movable contact assembly, and the fixed iron core is arranged in the framework. The high-voltage DC relay has the advantages of reasonable structure, simplicity in production process, high working voltage, long service lifetime, safety and reliability.