13 results about "Live-line working" patented technology

A five-prevention sound-light alarm device for a switch cabinet comprises a power supply unit, a state indication unit, an audio warning unit and a light-emitting warning unit. The power supply unit outputs low-voltage direct current and provides working voltage for the state indication unit, the audio warning unit and the light-emitting warning unit; the audio warning unit and the light-emitting warning unit work cooperatively; the light-emitting warning unit comprises a plurality of parallel detection branches, each detection branch corresponds to a working interval in the switch cabinet and is provided with a signal lamp, and when a cabinet door of the live working interval is opened, the signal lamp emits light for warning; meanwhile, the audio warning unit is triggered to give out an audio warning; when the equipment is not allowed to operate and enters the electrified interval by mistake, the alarm sound and the alarm lamp can remind, so that the safety of the equipment can be improved, and the accident rate can be reduced.

A five-prevention audible and visual alarm apparatus for a switchgear, comprising: a power supply unit, a state indication unit, an audible warning unit, and a visual warning unit. The power supply unit outputs a low-voltage direct current, and provides a working voltage for the state indication unit, the audible warning unit, and the visual warning unit. The audible warning unit and the visual warning unit work cooperatively. The visual warning unit comprises a plurality of parallel detection branches. Each detection branch corresponds to a working compartment in a switchgear and is provided with an indicator light (10). When a door of a live working compartment is opened, the indicator light (10) emits light to provide a warning. Simultaneously, the audible warning unit is triggered to provide an audible warning. In the case of accidentally entering a live compartment when a device is not allowed to be operated, an audible alarm and a visual alarm will be triggered to give alerts, thereby enhancing device safety and reducing the likelihood of accidents.

The invention discloses a power supply circuit, a power control circuit, a power supply circuit and an integrated circuit board. The power supply circuit comprises a remote control transceiver module used for receiving a remote control signal; and the power supply control module is used for outputting a power supply voltage signal to the power control module when the remote control signal represents startup so as to enable the power control module to work in an electrified manner, and stopping outputting the power supply voltage signal so as to enable the power control module to stop working when the remote control signal represents shutdown. The power supply control module outputs the power supply voltage signal to the power control module according to the remote control signal representing startup so as to supply power to the power control module, and when the remote control signal represents shutdown, the power supply control module stops outputting the power supply voltage signal, so that the power control module stops working; therefore, the power control module in the power supply circuit and all loads at the rear stage of the power control module are turned off, and the standby power consumption is greatly reduced.

The application discloses a control method, system and device of a low-voltage power source spare automatic throw-in. The method comprises the following steps: determining the load-carrying state of the incoming line side of a working power source switch, the electrified state of a power bus section and the electrified state of the incoming line side of a spare power source switch; when the working power source switch is closed, the spare power source switch is opened and the power bus section is electrified, controlling the first time relay to be powered on; when the spare power source switch is opened, the incoming line side of the spare power source switch is electrified, the incoming line side of the working power source switch is not loaded, the power bus section is not electrified and the first time relay is powered on for a certain time, controlling the second time relay and the third time relay to be powered on; when the working power source switch is closed and the second time relay is powered on for a certain time, controlling the working power source switch to be opened by using the tripping coil of the working power source switch; and when the working power source is opened and the third time relay is powered on for a certain time, controlling the spare power source switch to be closed by using the closing coil of the spare power source switch.

The application relates to a live working insulator cleaning device and a working method thereof. The device comprises an insulator string arranged on a live line, the first end and the second end of the insulator string are connected to the lower ends of first and second supports, a track parallel to the axial center line of the insulator string is connected between the upper ends of the first and second supports, a sliding seat is slidably connected to the track, a water tank, a water nozzle and a water supply pipeline connected between the water tank and the water nozzle are connected to the sliding seat, the water nozzle faces the insulator string, a high-pressure water pump is connected in series to the water supply pipeline, a power battery for supplying power to the high-pressure water pump is connected to the sliding seat, and the first and second supports and the track are all made of insulating materials. The device is not impacted by high-voltage electricity, the insulator cleaning device is prevented from being damaged, and the stability of the high-voltage line power grid work is not affected.

The application discloses a machine vision-based industrial product quality detection system and method, and particularly relates to the technical field of industrial automation; the application effectively solves the technical problem that the prior art can only complete static appearance quality detection of electronic components and cannot identify hidden functional defects of the components under rated working conditions, through multi-view appearance image acquisition and defect analysis, a surface evaluation coefficient is quantitatively generated, and preliminary screening and filtration of unqualified products are completed; then, rated electrical excitation is applied to the appearance qualified products, through multi-modal machine vision imaging, multi-dimensional response images such as infrared thermal imaging and microscopic dynamic imaging of the components during electrified working are synchronously acquired, the functional characteristics of four core dimensions of heat, deformation, action response and photoelectric switch are accurately quantified, hidden defects without static appearance representation are effectively detected, the risk of unqualified products flowing into the market is greatly reduced, and the running stability and use safety of terminal equipment are guaranteed from the source.

The utility model discloses a cabinet door with a protection structure and a cabinet, which relate to the technical field of electrical cabinets and comprise a cabinet door, a movable assembly, a limit sensing assembly and a protection lock. According to the utility model, a mechanical interlocking structure in which the handle on the cabinet door drives the movable assembly to move back and forth is adopted to control the opening and closing of the observation hole on the cabinet door, and whether the cabinet can execute mechanical operation or not is judged according to whether the observation hole is in an open state or a closed state; and meanwhile, a double protection mechanism that the limiting induction assembly detects and feeds back the moving position of the movable assembly and the protection lock electrically controls the cabinet and mechanically controls locking and unlocking of the movable assembly is adopted, real-time monitoring and safety control over the working state are achieved, live-line work is effectively avoided, and the personal safety of workers is guaranteed.

The invention belongs to the technical field of power equipment connection, and particularly relates to a live-line modularized quick plug terminal protection device, which comprises a transformer substation equipment main body and a plug module, the plugging module comprises a terminal main body, a plugging sheet and a power line; the plurality of insertion sheets are fixedly connected to the inner wall of the terminal main body, and the insertion sheets are matched with the power transformation equipment main body; the power line is installed at one end of the terminal main body away from the insertion sheet. Through the arrangement of an insertion block, a pushing block and a pressing column, in the insertion process, a protective cover extrudes the insertion block, a second spring is compressed, the insertion block moves towards one side away from the protective cover until the insertion groove is aligned with the insertion block, and the insertion block is inserted into the insertion groove under the action of the second spring, so that the protection cover is fixed, the terminal main body is prevented from falling off in the working process, and the service life of the terminal main body is prolonged. The live-line work of the substation equipment main body is influenced; and the sealing ring and the sealing ring are arranged at the two ends of the protective cover correspondingly, sealing of the protective cover is achieved, and therefore water prevention and dust prevention are achieved.

The present invention is for performing uninterruptible power distribution construction through indirect live line work and, more specifically, relates to an extension arm of a steel crossarm for an indirect live line, a method for establishing an indirect live line work safety distance using same, and an indirect live line uninterruptible power distribution method based on the method for establishing an indirect live line work safety distance, wherein the indirect live line work safety distance is established by extending a steel crossarm of a distribution line by means of the indirect live line work, and the indirect live line work safety distance is established by extending the steel crossarm and moving a wire with respect to one or more upper and lower distribution lines, thus making it possible for workers to perform the indirect live line work of the distribution line, such as changing poles for one or more distribution lines and the upper distribution lines thereof, replacing steel crossarms, replacing suspension insulators, replacing LP insulators, adjusting sagging, installing and removing LA, installing inserted poles, replacing electric poles, installing and removing protective shields, replacing jumper wires, replacing electric wires, inspecting lines, and installing and removing switches, in a state in which safe entry and the safety distance have been established.

The present invention discloses a protective cover for the low-voltage side of a transformer that can work under power and an installation tool, the protective cover comprising a first protective cover and a second protective cover for wrapping the wiring posts on the low-voltage side of the transformer; a plurality of first fixing seats are arranged on the side of the first protective cover, and a plurality of second fixing seats are arranged on the side of the second protective cover, and the first fixing seats correspond to the second fixing seats one by one; a first magnet is arranged in the first fixing seat, and a second magnet is arranged in the second fixing seat, and the polarities of the first magnet and the second magnet are opposite; a first opening is provided on one side of the first protective cover, and a second opening is provided on one side of the second protective cover, and the first opening and the second opening cooperate to form an outlet port on the low-voltage side of the transformer; the protective cover for the low-voltage side of the transformer that can work under power provided by the present invention can realize rapid installation of the first protective cover and the second protective cover by attracting the first magnet and the second magnet.

The invention discloses a railway contact line icing state monitoring device and method, and belongs to the field of catenary safety operation assessment, the device comprises a monitoring terminal, the monitoring terminal comprises a non-working contact line arranged close to a working contact line; the icing state acquisition unit is used for acquiring icing state information of the non-working contact line; and the control unit is used for judging whether the non-working contact line is iced or not according to the icing state information and measuring the icing thickness in the icing state. The non-working contact line is arranged independent of the overhead line system, no power-off transformation is needed for the existing live working contact line, the construction difficulty and the implementation cost are reduced, and the method is suitable for newly-built and existing lines; by performing close-range icing monitoring on the non-working contact line and combining with the icing state acquisition unit, the icing state information can be accurately acquired, the monitoring precision and the early-stage discovery capability are improved, and the defect that an image method is susceptible to environmental interference and ice layer transparency is overcome.

The purpose of the present invention is to perform a power-failure-free power distribution project by means of indirect live-wire work, and more specifically, to a cross-arm extension arm for an indirect live wire, a method for securing a safe distance for indirect live-wire work using the same, and a method for power-failure-free power distribution of an indirect live wire based on the method for securing a safe distance for indirect live-wire work. The cross arm of the distribution line is prolonged through indirect live wire operation, the safe distance of indirect live wire operation is ensured, and the safe distance of indirect live wire operation is ensured through extension of the cross arm and movement of the electric wire for the distribution line with more than one upper loop and more than one lower loop. The safety entering and the safety operation distance are ensured; indirect live wire work such as post change, cross arm replacement, suspension insulator replacement, LP insulator replacement, sag adjustment, LA arrangement and removal, new arrangement of insertion posts, telegraph pole replacement, protection tool arrangement and removal, jumper replacement, electric wire replacement, line inspection and shutter arrangement and removal of more than one loop of distribution lines and distribution lines at the upper ends of the distribution lines can be realized.