5 results about "Live-line working" patented technology

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 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 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 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.