42results about How to "Ensure safe power supply" patented technology

The invention relates to a medium-voltage power transmission fire-resistant cable, which is characterized in that the outer fire-resistant layer of the medium-voltage cable core is made of fire-resistant inorganic fiber heat insulation layer on the inner side, and the outer side is a soft thermosetting elastomer for normal use. The composite fire-resistant and heat-insulating layer of the heat layer, the thermosetting elastomer, is composed of 30-50wt% silicon-based elastic material, 40-60wt% inorganic filler, 5-15wt% medium and low temperature frit, 4-10wt% vulcanizing agent, It is made by mixing extrusion molding and vulcanization. The composite fire-resistant and heat-insulating layer is a relatively soft sheath material when it is not exposed to flames, which can ensure good bending performance of the refractory structure in normal conditions, and quickly transforms into a shell-and-tube refractory and heat-insulating structure when it encounters fire or high temperature. In the fire-fighting environment, it can still maintain a certain period of time without being damaged, effectively preventing damage to the inner insulation caused by flames or high temperatures. When the flame temperature of the outer layer is 850°C, the temperature of the inner insulation surface is lower than 180°C. This fire-resistant and heat-insulating structure can be applied according to conventional cable production methods, and the production efficiency is extremely high.

The invention discloses a finished automobile intelligent controller of a journey increasing type electromobile. The controller comprises a microprocessor, a power supply module, an on-off quantity input module, a voltage simulation quantity input module, a pulse quantity input module, a BDM (Background Debugging Mode) debugging interface, an on-off quantity output module, a simulation quantity output module, a PWM (Pulse-Width Modulation) output module, a CAN (Controller Area Network) communication module and an IIC (Inter-Integrated Circuit) communication module. Due to the arrangement of the design such as contrary connection prevention for the power supply model, and the processing of the on-off quantity input module and the on-off quantity output module, safe and stable work of the power supply module is ensured; due to the processing on the input/output of the on-off quantity, input /output signals are converted from parallel signals into serial signals, so that the hardware resource such as the microprocessor is saved, and the control efficiency is improved.

The invention relates to the field of GW6 series alternating high-voltage isolating switches of a flexible busbar in a power grid 220 kV substation and particularly relates to a live replacement method for a static contact of the 220 kV flexible busbar. The live replacement method for the static contact of the 220 kV flexible busbar is characterized in that operation persons ascend to the position below the flexible busbar along an insulation herringbone ladder and subject the static contact of the flexible busbar to live replacement by means of using an idiostatic method to transfer potentials, and the live replacement method includes a detachment step and an installation step. Compared with replacement methods in prior art, the live replacement method for the static contact of the 220 kV flexible busbar has the advantages that the insulation herringbone ladder is used as an insulation manned platform and meets the requirement of an equipotential operation method, and the insulation herringbone ladder is small in size, can be lifted below the flexible busbar, and is applicable to live replacement operation for static contacts of GW6 series sing-column and double-column vertical opening type isolating switches of the 220 kV flexible busbar; the live replacement method is capable of promoting scientific and technological progress and has obvious social benefits and economical benefits; and the live replacement method fills the gap in the live replacement projects of the static contacts of the isolating switches and has a broad application prospect and a popularization value in national grid systems.

The invention relates to a power supply device, in particular to an arc extinguishing control device for a contact net, which is mainly used for a railway contact net, and is used for eliminating the fault phenomenon of the contact net such as arc discharge, trip, burn and the like. The arc extinguishing control device consists of an arc extinguishing main controller MCU, an overvoltage absorber MDA and a permanent-magnetic controlled arc extinguishing switch, wherein the overvoltage absorber MDA and the permanent-magnetic controlled arc extinguishing switch are connected in parallel, and the arc extinguishing main controller MCU is connected with the permanent-magnetic controlled arc extinguishing switch. The arc extinguishing control device has the advantages that the device with the arc extinguishing capacity assists the arc discharge phenomenon between an electric arc and the contact net; electric appliances with the arc extinguishing capacity are arranged to inhibit the electric arc during the running so as to shorten the arcing time and arcing strength; and the device radically avoids trip accidents of the power supply and burn accidents for the electric appliances.

The invention relates to a wearable energy self-supply safety monitoring alarm system, comprising an execution module and an energy self-supply power source, wherein the energy self-supply supplies electric power for the execution module.The system can timely monitor the environment status where the miners locate, can give an alarm in case of danger, and the structure is small, easy to carry, and is carried in the form of wearable bracelet; the power is supplied by the human vital signs, no need of replacing battery or frequent charging; safe and reliable, the highest output voltage thereof is 5.5V, and the heat effect produced in work is insufficient to light inflammable gas by the method of circuit energy limiting; simple operation, when a certain parameter among various environment parameters exceeds threshold value, the alarm will be triggered automatically, to remind the miners to stay away from the hazardous area.

The invention belongs to power industry power transmission and transformation safety guaranteeing construction equipment and particularly relates to a suspension type movable branch cutting device. A motor (13) is mounted on the lower portion inside a trapezoid outer shield (15). The upper end extension shaft of the motor (13) is connected with a worm wheel and worm type reducer (12). A drive sprocket (11) is mounted on the extension shaft of the reducer (12). A support (10) is fixed on the upper portion outside the outer shield (15). A driven sprocket (8) is mounted on a driven sprocket shaft (7) in the support (10). The driven sprocket (8) is in transmission connection with the drive sprocket (11). Two reset springs (5) are fixedly mounted on the driven sprocket shaft (7) on the outer side of a lower roller (6). The reset springs (5) are respectively movably connected to two upper roller shafts (2). A first chain saw sprocket (20) and a second chain saw sprocket (18) are mounted on the lower end extension shaft of the motor (13). A chain saw (16) is mounted on each of the first chain saw sprocket (20) and the second chain saw sprocket (18). The suspension type movable branch cutting device automatically controls the motor to move so as to cut the branches, causing potential safety hazard, below electric wires, and safe circuit power supply can be guaranteed.

The invention discloses a double-power switch control device which comprises a control unit and an execution unit, wherein the control unit comprises a DSP (digital signal processor), a control loop A and a control loop B; the control loop A is used for detecting voltage, frequency and phase position of a frequently-used power supply in real time and sending real-time signals to the DSP; after the real-time signals are judged by the DSP, corresponding operating orders are sent to the execution unit to control the switch-on and switch-off of the frequently-used power supply; the control loop B is connected with the DSP so as to control the switch-on and switch-off of a stand-by power supply; the frequently-used power supply and the stand-by power supply are in interlocking relation, namely, one of the power supplies is switched on, while the other is automatically switched off. According to the invention, the characteristics of high speed, high precision and powerful functions of the DSP are utilized, the stable, reliable and quick switch of the double-power switch is realized and the continuous, uninterrupted safe power supply is ensured; as the switch is switched manually, the control is diversified.

The invention relates to a clearance overvoltage damping device, including an insulation cylinder, the interior of which is fixedly provided with a non-inductance resistor and a gas discharge tube, the non-inductance resistor is connected with the gas discharge tube in series, and terminal blocks are arranged on the insulation cylinder. The overvoltage which is caused by the transition process when throwing and cutting a capacitor group can be inhibited effectively, the invention can prevent the occurrence of the accidents of a capacitor, a discharge coil, a circuit breaker and other equipments, ensures the safe power supply and has obvious damping effect for the transition process which is caused by switching-on and re-ignition, the protection capability is strong and the service life is long.

The invention belongs to the technical field of the Internet of Things, and particularly relates to an Internet-based high-voltage switch cabinet monitoring system, which comprises an MCU module, the input end of the MCU module is electrically connected with a power supply circuit module, the input end of the MCU module is electrically connected with an electric energy quality acquisition module, the MCU module is electrically connected with a communication module, and the communication module is electrically connected with a wireless communication module. The MCU module is electrically connected with a five-prevention locking detection module, the MCU module is electrically connected with a human body infrared induction detection module, the MCU module is electrically connected with a temperature and humidity detection module, and the MCU module is further electrically connected with an Internet of Things remote monitoring and inspection module. According to the invention, real-time monitoring of temperature and humidity, electric quantity and electric energy quality in the high-voltage switch cabinet, a five-prevention locking operation state and whether people approach around the switch cabinet can be realized.

The invention relates to a method for solving the problem that the environment temperature of a transformer room is too high, in particular to a method for reducing the environment temperature of thetransformer room. The method comprises the steps: calculating a low-voltage side secondary current value when the load rate is 60% according to the capacity of a dry-type transformer installed in a 10kV room, setting a corresponding action current value through a dial switch of an intelligent current relay, and when the intelligent current relay collects the current of a dry-type transformer low-voltage side current transformer to meet the action current, enabling the intelligent current relay to output a passive contact, and connecting the normally open passive contact of the intelligent current relay to a starting loop of the on-site axial flow fan, thereby achieving the forced ventilation and heat dissipation of the transformer room, and solving a problem that the temperature rise of the dry-type transformer is too high during the heavy-load operation in summer. According to the invention, the temperature rise problem of the dry-type transformer installed indoors during high-load and high-temperature operation can be well solved.

The invention provides a method for fixing electric pole ends without releasing partial prestress. The method includes steps of prefabricating a concrete pole body, installing the corrosion-resistant electric pole ends and fixedly installing low-relaxation helical rib steel wires; enabling the aperture of the upper end of the concrete pole body to be smaller than that of the lower end of the concrete pole body; installing the corrosion-resistant electric pole ends at the upper end and the lower end of the concrete pole body; fixing the corrosion-resistant electric pole ends to the concrete pole body by the aid of the low-relaxation helical rib steel wires to guarantee that an effect of the prestress can be effectively realized. The method has the advantages that the corrosion-resistant electric pole ends are connected onto the concrete pole body by the low-relaxation helical rib steel wires, so that the effect of the prestress of an electric pole can be effectively realized, operation is simple, the method is easy to implement and popularize, and the technological cost is low; T-shaped low-relaxation helical rib steel wire through holes are formed in joints of the low-relaxation helical rib steel wires and the corrosion-resistant electric pole ends, so that the low-relaxation helical rib steel wires can be prevented from falling off, the service life of a product can be prolonged, and safe power supply can be guaranteed.

The invention discloses a power transmission line lightning current fault type judgment method, and relates to the technical field of power transmission line lightning fault identification. The objectof the invention is to accurately determine the fault type in the existing power grid operation. According to the invention, direct measurement of direct lightning is carried out through the sensor installed at the tower top, a sensor installed on a three-phase line is used for indirectly measuring lightning current transmitted along the line, accurate full-waveform lightning parameters which aredirectly measured and key parameters which are indirectly measured in a large range are subjected to data accumulation, and the fault type of the tower is judged by analyzing measured data.

The invention provides a distribution box, relates to the technical field of distribution equipment, and solves problems of poor waterproof, dustproof and fireproof performances and inconvenient maintenance of the distribution box. The distribution box comprises a casing provided with a heat radiation port, an internal temperature sensor, a temperature relay and a fan electrically connected in sequence and arranged in the casing, a movable illuminating lamp arranged in the casing, replaceable dust-sticking paper arranged in the casing, and a waterproof housing arranged outside the casing, thefan is arranged at the heat radiation port, a roof of the waterproof housing comprises a projection, the roof is in a downward inclined structure from the projection and extends to the outside of sidewalls of the waterproof housing, and the internal surface of the waterproof housing is provided with an explosion-proof clay layer, and a smoke sensor, a humidity sensor, an external temperature sensor, a control panel and a buzzing alarm arranged on the internal surface of waterproof housing. According to the distribution box, the movable illuminating lamp is provided so that the maintenance convenience is improved, dust in the casing is reduced through the dust-sticking paper, and the waterproof and fireproof performances are enhanced through the waterproof housing.

The invention discloses a mine intrinsically safe power supply with eliminating spark energy, comprises an intrinsically safe power supply body and a linear choke coil arranged in an explosion-proof housing, the positive electrode of the intrinsically safe power supply body is connected with one end of a linear choke coil inductance coil L1, the other end of the inductance coil L1 is connected with a positive electrode output terminal of the power supply, the positive electrode of the diode D1 is connected with the positive electrode output terminal of the power supply and the negative electrode is connected with the positive electrode of the intrinsically safe power supply body in parallel at both ends of the inductance coil L1; A negative electrode of an intrinsically safe power supply body is connected to one end of a linear choke coil inductance coil L2, At that other end of the inductor coil L2, a negative electrode output terminal of the power supply is connected, and a damp diode D2 is connected in parallel to both ends of the inductor coil L2. The positive electrode of the damping diode D2 is connected with the negative electrode of the intrinsically safe power supply body,and the negative electrode is connected with the negative electrode output terminal of the power supply. The invention has the advantage that the output carrying capacity of the intrinsically safe power supply for mining is improved.

An outdoor high-voltage vacuum circuit breaker comprises a stabilized voltage supply, a high-voltage vacuum circuit breaker body, a standby high-voltage vacuum circuit breaker, a prompt circuit, a time circuit, a contact detection circuit, a temperature detection circuit, an arc discharge detection circuit and a time delay circuit. The arc discharge detection circuit and the temperature detection circuit are respectively matched with a photoresistor and a temperature switch, the photoresistor is arranged at the outer side end of an arc extinguishing chamber of the high-voltage vacuum circuit breaker body, and the temperature switch is arranged at a heating part of the high-voltage vacuum circuit breaker body; the stabilized voltage supply, the time circuit, the contact detection circuit, the prompt circuit, the temperature detection circuit, the arc discharge detection circuit and the time-delay circuit are installed in the electric cabinet and are electrically connected with the high-voltage vacuum circuit breaker body and the standby high-voltage vacuum circuit breaker. The performance of the contact of the high-voltage vacuum circuit breaker body can be detected, and the temperature and whether an arc discharge phenomenon occurs can be detected in real time; and when overtemperature, arc discharge and poor contact performance occur, related personnel can be prompted by a short message for maintenance.

The invention discloses a device for remotely controlling the trip-out of a power load management terminal of a multi-specialty-transformer parallel running user. The device comprises a load management terminal (1), wherein the load management terminal (1) is provided with a first remote control trip-out control end (2), a second remote control trip-out control end (3), a third remote control trip-out control end (4) and a fourth remote control trip-out control end (5); the first remote control trip-out control end (2) is connected with all contact cabinets (6) of a parallel running user; the first remote control trip-out control end (2) is used for realizing the synchronous trip-out of all the contact cabinets (6) and maintaining the balance of specialty-transformer loads; and the second remote control trip-out control end (3), the third remote control trip-out control end (4) and the fourth remote control trip-out control end (5) are respectively connected with a load I (9), a load II (7) and a load III (8) according to the importance level of the loads.