50results about How to "Shorten power outage maintenance time" patented technology

The present invention provides a plug-in meter front switch device. The plug-in meter front switch device comprises a breaker and an insulating pedestal; the breaker includes three phase input terminals and three phase outlet terminals; the pedestal is provided with six sockets; the three phase input terminals and the three phase outlet terminals are respectively plugged on the six sockets to install and fix the breaker; and three phase incoming lines and three phase outgoing lines are respectively connected with the six sockets and are connected with the three phase input terminals and the three phase outlet terminals of the breaker in a one-to-one correspondence relationship through the six sockets. The maintenance and the replacement of the plug-in meter front switch device are very easy, flexible and reliable, with no need for turning off a superior power supply; and moreover, the plug-in meter front switch device is safer and more reliable through adoption of a breaker for controlling switching of a current, and once the installation of the plug-in meter front switch device is completed, three phase incoming lines and three phase outgoing lines are free of demolition so that aging and corrosion of junctions are avoided, therefore potential risks are greatly reduced and work safety is improved.

An auxiliary device for mounting a current transformer of a middle-arranged switchgear comprises the components of an elevator, a supporting platform, a vertical sliding table, a transverse sliding table, a turntable and a positioning unit. According to the specific mounting environment of the middle-arranged switchgear and the moving direction of a current inductor in actual operation, quick feeding and micro feeding adjustment in a vertical surface to a current inductor mounting screw hole relative to the threaded hole position in assembling maintenance are realized. Transverse feeding motion, longitudinal feeding motion and rotation motion in the horizontal surface are realized. A requirement for realizing correspondence between the current transformer threaded hole and the assembling threaded hole of the middle-arranged switchgear is satisfied through adjusting feeding in multiple directions and rotation alignment of the auxiliary device and placing the current transformer on the turntable in the mounting process. Lifting of the current transformer through manpower is not required, thereby reducing labor intensity; improving assembling reliability; shortening time length in mounting, maintenance and replacement; and shortening power-off maintenance time.

The invention discloses a protection device of a closing coil. The device comprises a normally closed contact of a relay JD1 which is in series with a closing coil HD in a divide-shut circuit of a switch, and partial pressure sampling circuits, inverse circuits and a controlling protection circuit which are in series connection to control the on-off of the normally closed contact point of the relay JD1. wherein one of the two partial pressure sampling circuits is connected with the closing coil HD in the divide-shut circuit of the switch, the other is connected with an opening coil TQ in a closing circuit; the two inverse circuits are respectively connected with the two partial pressure sampling circuits and are used to transfer the output voltage of the closing circuit into the voltage capable of being received by the controlling protection circuit; the controlling protection circuit is used to control the on and off of the relay JD1 according to the collected voltage and preset time of the two partial pressure sampling circuits. The protection device of the closing coil is based on the principle of collecting voltage changes of the before and after patch of switch controlling closing loop and can timely control the disconnection of the circuit of the closing coil when the closing is not successful, thereby reliably avoiding the phenomenon that the closing coil is burned.

The invention discloses a method for diagnosing an impact on a metallic oxide arrester electrification test from inter-phase interference. The method includes: acquiring instantaneous voltage values at various sampling times from leads on high-voltages sides of an A-phase metallic oxide arrester and a C-phase metallic oxide arrester, calculating phase angles of instantaneous voltage via the Fourier algorithm, acquiring instantaneous leakage current values at various sampling times from grounding down leads of the A-phase metallic oxide arrester and the C-phase metallic oxide arrester, separating resistive current from instantaneous leakage current, calculating a phase angle of the resistive current via the Fourier algorithm, calculating an interference coefficient, and diagnosing by comparing the interference coefficient with a setting valve. By the method, the impact on the metallic oxide arrester electrification test from the inter-phase interference is accurately diagnosed, if any inter-phase interference leads a metallic oxide arrester electrification test result to be abnormal, the diagnosing result can provide powerful reference to testing workers for accurately analyzing insulating performance of the metallic oxide arresters, and testing workers' judgment error caused by the abnormal testing result due to the inter-phase interference can be effectively avoided.

The invention relates to a high-voltage direct-current power transmission TTM board card fault positioning system and fault positioning method thereof. The system includes a wave recording monitoring system, a VBE and a valve module which are connected in sequence, a thyristor triggering monitoring unit TTM board card in the valve module collects and processes a node signal that a converter valve needs to monitor, soon afterwards a processing judgment signal is transmitted to a signal collection communication board, and the signal is stored in a storage chip of the signal collection communication board; when a triggering monitoring case of the VBE detects that the TTM board card of a certain stage or multistage thyristor sends an overvoltage protection return pulse, energy taking return pulse disappears or the signal collection communication board detects a key signal abnormality of itself, wave recording is automatically started or wave recording is started in a manual mode; and a fault recording device performs fault positioning. The high-voltage direct-current power transmission TTM board card fault positioning system provided by the invention solves the problem that in a high-voltage direct-current power transmission converter valve body, under the working condition of strong electromagnetic field interference, tracking of a TTM board card key signal node cannot be realized in a fault section.

The invention discloses a charged plugging method under voltage for gas leakage of GIS equipment. The method comprises an omega-shaped rubber strip (4) that can be annularly coated on both sides of a leakage position of the GIS equipment, a disconnection valve (6) communicating with the omega-shaped rubber strip (4), a plurality of ribbons (5) for binding the omega-shaped rubber strip (4) on the GIS equipment, as well as a plurality of adhesives. By adopting the charged plugging method under voltage for the gas leakage of the GIS equipment disclosed by the invention, large area leakage can be plugged conveniently and quickly without power down.