33results about How to "Prevent Personal Electric Shock Accidents" patented technology

The invention discloses a power plug with leakage protection function. The power plug comprises a shell, wherein one side of the shell is provided with a reset button and a test button which are exposed on the surface of the shell, the other side of the shell is provided with a power live wire pin, a power neutral wire pin and a circuit board; and the inside of the shell is provided with a static contact connected with the live wire pin and the neutral wire pin and a movable contact which can be connected or disconnected with the static contact. The technical scheme of the invention is characterized in that the inside of the shell is provided with a tripping device which controls the connection or disconnection of the movable contact and the static contact. The invention aims to overcome the defects of the prior art and provides a power plug with leakage protection function which has high safety and protection performance, simple structure and reasonable design, is suitable for batch production and can detect the leakage fault of the power cable in real time and cut off the connection of the power supply and the load timely.

The invention discloses a substation field operation safety management and control system and method based on robot technology, belonging to the field of safety management and control technology, wherein the security management and control system comprises an information acquisition layer, a data processing layer and a field control layer, the data processing layer includes a remote inspection monitoring management server, the field control layer includes a control robot, the information acquisition layer is connected with the data processing layer through a mobile operation terminal, and theremote inspection monitoring management server is wirelessly connected with the control robot. The substation field operation safety management and control system integrates artificial intelligence, Internet of things, cloud computing, image recognition, communication technology in intelligent maintenance management of a substation; for the first time, robot technology is applied to the maintenance management of a power grid, which realizes the omni-directional protection for the personnel in the working area of high-voltage substation, effectively solves the personal electric shock accident caused by the weak safety consciousness of human beings, and will surely support the development of intelligent operation and inspection in the future.

The invention discloses a composite insulator support fixing gap line type arrester, wherein a compound insulation alternating current gapless metallic oxide arrester and an insulator used for supporting gaps are combined into a whole; a tap is led out between the arrester and the insulator; an upper discharge electrode is bent to be connected with a gap upper discharge ball; the upper discharge electrode is packed by silicon rubber, and the upper discharge ball is covered by a silicon rubber cover, thus preventing the discharge ball from causing human electric shock due to suspension high-voltage potential; and in addition, after a protective cover is added, the reliability for resisting rain, snow and birds can be improved. The arrester has two types of structures, the upper and lower parts of the arrester can be grounded so as to meet the wiring requirements when the lead is arranged above or below the tower cross arm; and the arrester can be respectively applicable to straight rods and broken link rods, the volume is small and the installation and construction are convenient.

The invention relates to a mining flame-proof type selective leakage protector. The mining flame-proof type selective leakage protector is characterized in that the mining flame-proof type selective leakage protector comprises a single chip microcomputer, a power supply unit, a liquid crystal display module, a signal detecting and processing circuit, a communication module and a drive tripping circuit. The power supply unit is connected with the single chip microcomputer and the liquid crystal display module and supplies power for the single chip microcomputer and the liquid crystal display module, the single chip microcomputer is connected with a zero-sequence current mutual inductor arranged on a power supply system through the signal detecting and processing circuit to achieve an electric leakage detecting function, the single chip microcomputer is connected with a tripping executing mechanism on the power supply system through the drive tripping circuit to achieve a tripping control function, and the single chip microcomputer is connected with a remote monitoring host machine to achieve a remote monitoring function. The mining flame-proof type selective leakage protector is reasonable in design, achieves the function of classified selective electric leakage protection of a trunk line and a branch line of the power supply system with no neutral ground in an underground coal mine, improves the automation degree and the power supply quality of the coal mine, and better ensures personal safety and the safety of machinery equipment.

A GIS equipment loop resistance test auxiliary tool and an electric power construction enforcement method belong to the power transmission and transformation equipment operation and disaster prevention technology fields, aim to carry out the GIS equipment loop resistance testing works, thus solving the safety installation test wire clamp problems; the GIS equipment loop resistance test auxiliary tool comprises a hooked wire clamp and an insulation rod, and said two parts are connected through a sawtooth engaged swivel joint; the hooked wire clamp body is used for clamping a bended hooked insulator of the lead wire; the inner bending side is provided with a conductive material making contacts with the lead wire; a voltage line and a current line respectively electrically connected with theconductive material as test wires, and led out from the tail of the hooked wire clamp body.

The invention discloses an alarming device for falsely opening an electrified space cabinet door, comprising a power source and a stroke switch arranged on a cabinet door. A normally-opened contact of the stroke switch is connected with a voice alarming device, the other side of the stroke switch is connected in series with a contact of an electroscope, and the power source is arranged between the voice alarming device and the contact of the electroscope. The invention judges whether the cabinet is electrified by utilizing the contact of the electroscope, the normally-opened contact of the stroke switch is closed when the cabinet door is opened when equipment is electrified, a circuit is switched on, and an alarm sends a voice signal to alert a client that the equipment is electrified so as to stop operation. No any prompting is changed to voice alarming, thereby the reliability of protecting people who violate regulations to falsely enter the electrified space is greatly increased, the safety and the efficiency of construction are increased and the security is greatly improved.

The invention discloses an intelligent electric water heater controller with leakage protection, which comprises an intelligent processing control circuit, a leakage detection circuit and a load relay, and the leakage detection circuit and the load relay are both electrically connected to the intelligent processing control circuit. The intelligent electric water heater controller with leakage protection of the present invention detects the leakage phenomenon through the fire zero leakage detection circuit and the ground wire leakage detection circuit, and the intelligent processing control circuit immediately cuts off the heating load, and cuts off the connection between the water heater shell and the external ground wire, so that The water heater is completely de-energized and disconnected from the external leakage electric device, so that there is no risk of electric shock to the water heater.

The invention discloses a high-voltage brake pull-rod capable of measuring the temperature and the load current. The high-voltage brake pull-rod capable of measuring the temperature and the load current comprises a brake pull-rod body and a link hook, and further comprises a temperature sensor and a current transformer which are arranged on the brake pull-rod. The magnetic core of the current transformer is composed of a magnetic core upper portion and a magnetic core lower portion. The signal output end of the current transformer and the signal output end of the temperature sensor are respectively connected with a signal processing switching circuit. A display module is connected to the output end of the signal processing switching circuit. The lower end of the magnetic core is fixed on the brake pull-rod, the upper end of the magnetic core is provided with a magnetic core rotating shaft and a drawing wire fixing hole, the upper portion of the magnetic core can rotate around the magnetic core rotating shaft, a spring fixing hole in a spring is formed in the magnetic core rotating shaft, and a drawing wire is connected with a drawing wire operation button through the drawing wire fixing hole. The high-voltage brake pull-rod capable of measuring the temperature and the load current avoids insulation breakdowns caused by high-voltage measurement or human body security threat possibly caused by measurement in special weather, ensures personal safety in the operation process, and avoids human body electric shock accidents.

The invention provides a remote tree felling mechanical arm and a using method. The remote tree felling mechanical arm is characterized by comprising a fixed mechanism, a first swing mechanism, a second swing mechanism, an executing mechanism, a wireless signal transmission module and a control system, wherein the first swing mechanism comprises a big arm base fixedly connected with the fixed mechanism, a big arm hinged with the big arm base on a first plane, and a first power mechanism used for controlling the big arm to swing; the second swing mechanism comprises a small arm base in slidinggroove connection with the large arm on the first plane, a small arm hinged with the small arm base on a second plane and perpendicular to the large arm, a second power mechanism used for controllingthe small arm base to slide, and a third power mechanism used for controlling the small arm to swing; and the executing mechanism is fixedly arranged at the tail end of the small arm. The whole set ofthe remote tree felling mechanical arm is good in flexibility, high in universality and high in safety, and solves the problems of a plurality of potential safety hazards on human bodies and equipment and the like for conventional felling of large trees located below live-line operation line corridors.

The invention relates to a metallic inner-thread water pipe joint facilitating equipotential line connection. The metallic inner-thread water pipe joint comprises a water pipe joint, wherein a metallic internal-thread joint is arranged in the water pipe joint through integral injection molding, a metallic bump is integrally formed on the outer side surface of the metallic internal-thread joint, a tightening thread hole is formed in the outer end surface of the metallic bump in an axial direction, and a connection hole communicated with the inner end of the tightening thread hole is formed in the outer side surface of the metallic bump in a radial direction; during using, one end of a wire extends into the connection hole, the tightening wire is screwed into the tightening thread hole by a tightening screw, and the other end of the wire is connected with an equipotential device which is pre-embedded into the wall and is grounded. The connection structure is safe and reliable, the wire is not prone to falling off, and human body electric-shock safety accidents caused by electric leakage of an electric heater in a toilet, thunder and lightning, static electricity and the like are effectively prevented. The metallic inner-thread water pipe joint is firm in connection, safe, attractive, low in processing cost, easy to operate and suitable for being used on a plastic water pipe fitting.

The invention relates to a cable external damage prevention early warning device and method. The device comprises a single-chip microcomputer module, a signal transmission lead, a sound-light alarm module and a power supply module. The power supply module is used for supplying power to the single-chip microcomputer module and the sound-light alarm module. The single-chip microcomputer module comprises a signal output end and a signal receiving end. The signal output end is used for sending a signal A, the signal receiving end is used for receiving the signal A, the signal transmission lead isused for transmitting the signal A sent by the single-chip microcomputer module to the signal receiving end of the single-chip microcomputer module, and the sound-light alarm module is connected withthe single-chip microcomputer module through a relay and is used for sending sound and light alarm signals. The technical scheme is suitable for a newly laid cable line and is also suitable for an oldcable line, is low in maintenance and replacement cost, and achieves early warning of a possible cable external damage event so as to effectively prevents improper excavation operation. A personal electric shock accident is avoided, damages to power facilities are prevented, power failure is avoided, an ' 'advanced operation and maintenance service' ' is realized, and power utilization satisfaction of a user is improved.

The invention discloses an electric shock prevention fixing device for isolation baffles of a high-voltage switch cabinet. The electric shock prevention fixing device comprises an upper clamping part, a lower clamping part and a locking pin. The lower portion of the upper clamping part is provided with a first through hole, the lower portion of the lower clamping part is provided with a second through hole, and the locking pin penetrates through the first through hole and the second through hole to fix the upper clamping part to the lower clamping part. The electric shock prevention fixing device has the advantages that the upper electric shock prevention isolation baffle and the lower electric shock prevention isolation baffle are fixed by the electric shock prevention fixing device for the isolation baffles so as to be locked and fixed in the working process and prevented from being manually opened under general conditions, so that personal electric shocks are effectively prevented, and urgent requirements of the technical field are met. In addition, the electric shock prevention fixing device is easy to manufacture, high in operability and suitable for being applied and popularized as an effective safety facility in the technical field.

The invention discloses a power distribution overhead transmission line live laying wrapping insulating layer robot, and belongs to the field of electric power and power grid. The power distribution overhead transmission line live laying wrapping insulating layer robot comprises a moving mechanism, a lift control mechanism, an insulated leather transmission device, an insulated wrapping transmission device, a data transmission module, a self-diagnosis system, a power supply system and a display system; wherein the moving mechanism is connected with the lift control mechanism, the moving mechanism is used for horizontal movement, the lift control mechanism is used for vertical movement, so as to drive the insulated leather transmission device and the insulated wrapping transmission device to connect displacement, the insulated leather transmission device is used for transmitting insulated leathers to the insulated wrapping transmission device, the insulated wrapping transmission deviceis used for wrapping the insulated leathers around wires, and performing sealing. The power distribution overhead transmission line live laying wrapping insulating layer robot of the invention effectively solves the problems of insulated transformation cost and power failure, and greatly saves transformation time and funds investment in comparison with a conventional power distribution line insulated transformation.

The invention discloses a valve mechanism locking device, which comprises a handcart track, a lower valve mechanism, an upper valve mechanism, a lower valve mechanism locking hole, an upper valve mechanism locking hole and a roller switch, and is characterized in that the lower valve mechanism and the upper valve mechanism are installed at one side of the handcart track, the upper valve mechanism is provided with the upper valve mechanism locking hole, the lower valve mechanism is provided with the lower valve mechanism locking hole, both the upper valve mechanism locking hole and the lower valve mechanism locking hole are internally provided with a latching electromagnet DST, the roller switch is provided with a roller switch auxiliary contact H1, the other end of the roller switch auxiliary contact H1 is electrically connected to a bus and circuit electrification display device H2, and the other end of an auxiliary contact of the bus and circuit electrification display device H2 is connected to the latching electromagnet DST. The valve mechanism locking device can effective prevent occurrence of a human body electric shock accident caused by opening a valve baffle artificially or by mistaken touch through electrical, electromagnetic and mechanical latching functions.

The invention relates to a high-voltage electric power equipment test connection device. The device comprises a base, a lifting rod and an electrical connection mechanism; the bottom end of the lifting rod is vertically fixed to the base; the electrical connection mechanism is detachably fixed to the top end of the lifting rod; a connector lug used for being connected to an electrical lead is further arranged on the electrical connection mechanism; the base comprises a disc, at least three supporting legs and supporting rods, wherein the supporting legs are uniformly distributed on the periphery of the disc, and the supporting rods are connected to the corresponding supporting legs; the bottom end of the lifting rod is connected to the center of the disc in a threaded mode; one ends of thesupporting legs are hinged to the periphery of the disc; the free ends of the supporting legs are detachably connected to one ends of the supporting rods in a rotating mode through pin shafts; and the other ends of the supporting rods are detachably connected to the lifting rod in a rotating mode through pin shafts. The device has the advantages that the problems of high-altitude falling and high-voltage electric shock risks in the high-voltage test process of electric power equipment can be solved, the operation safety of field staff can be guaranteed, and in addition, the safety, the applicability, the simplicity in operation and the economical efficiency can be achieved.

The invention discloses a safety warning indicator for power construction personnel. The safety warning indicator is characterized by comprising a shell (1), a state grid corporation of China (SGCC) icon (1), a receiving antenna (3) and a sling hole (2), wherein a main circuit board (4) and a battery (5) are arranged in the shell (1); the main circuit board (4) comprises an integrated circuit HEF4011BP and resistors R1-R8, an aluminum electrolytic capacitor C1, a leaded multilayer ceramic capacitor C2, a diode IN4148, a switch S1 (SW-SPDT), a switch S2 (SW-PB), a triode Q1 (9013) and a buzzer LS1. The safety warning indicator for power construction personnel is simple and practical in structure, can remind the construction operation personnel of paying attention to safety, can prevent power construction personnel from entering electrified areas and getting close to live equipment during work by mistake, can ensure personal safety of power construction personnel and device safety, and can further prevent human electric shock accidents.

The invention discloses an electric leakage protector. When electric leakage of an electrical appliance occurs and reaches an electric leakage set value, a tripping device acts to cut off connection between the live line, neutral line and ground line of a power supply and loads and protect personal safety and the electrical appliance. When circuit break of any of the live line, neutral line and ground line of the power supply occurs, the electric leakage protector cuts off the power supply to prevent electric shock accidents due to connected live line. The electric leakage protector has the advantage that the live line is connected before connecting of the neutral line and the ground line and cut off after cutting off of the neutral line and the ground line.

The invention relates to a transformation system with an instantaneous quick-break protection function. The system comprises a quick-break transformation device, wherein the output side of the quick-break transformation device is provided with a direct current-alternating current conversion unit which has a reverse H-bridge structure and is formed by IGBT modules, the IGBT modules on the output sides of the direct current-alternating current conversion unit are respectively provided with a shunting bypass, and a thyristor is arranged on each shunting bypass. The invention further relates to a quick-break protection method of the voltage transformation system. When an electric leakage fault is judged, the thyristors are controlled to be switched on, so the output-side IGBT modules in the direct current-alternating current conversion unit are switched off automatically, each shunting bypass adopts an over-damping circuit to quickly attenuate current to zero, the thyristors are switched off automatically, and power supply of an alternating current power supply system is cut off. The time for cutting off the power supply of the alternating current power supply system does not exceed 0.35 millisecond, personal electric shock safety accidents caused by electric leakage or short circuit of a low-voltage power supply system in an underground coal mine can be effectively prevented, and the safety, controllability and stability of the power supply system are improved.

Provided is a portable power supply module tester. The appearance of the tester is a suitcase. An aluminum-plastic high-density plate is used as a box body material. A power interface shaped like a Chinese character 'pin' is installed on the vertical face of the rear side of the box body, a small pull-out door is formed in the vertical face of the right side of the box body, a JMD-37 connector isinstalled in the box body, and an air circuit breaker, an LED indicator lamp, a voltmeter, a test starting button, a wiring terminal and a grounding pile are evenly arranged on a panel on the front face of the box body, which can be seen by opening the upper cover of the box body. The portable power supply module tester is suitable for various types of AC / DC power supply modules on an intelligentpower supply screen used by a railway electric service system.

The invention relates to a mining flame-proof type selective leakage protector. The mining flame-proof type selective leakage protector is characterized in that the mining flame-proof type selective leakage protector comprises a single chip microcomputer, a power supply unit, a liquid crystal display module, a signal detecting and processing circuit, a communication module and a drive tripping circuit. The power supply unit is connected with the single chip microcomputer and the liquid crystal display module and supplies power for the single chip microcomputer and the liquid crystal display module, the single chip microcomputer is connected with a zero-sequence current mutual inductor arranged on a power supply system through the signal detecting and processing circuit to achieve an electric leakage detecting function, the single chip microcomputer is connected with a tripping executing mechanism on the power supply system through the drive tripping circuit to achieve a tripping control function, and the single chip microcomputer is connected with a remote monitoring host machine to achieve a remote monitoring function. The mining flame-proof type selective leakage protector is reasonable in design, achieves the function of classified selective electric leakage protection of a trunk line and a branch line of the power supply system with no neutral ground in an underground coal mine, improves the automation degree and the power supply quality of the coal mine, and better ensures personal safety and the safety of machinery equipment.

The invention provides a five-prevention locking device of a high-voltage switch cabinet and a control method of the five-prevention locking device. The five-prevention locking device comprises a control box, a locking structure, a power switch, an electroscopic signal lead-in wire, a control circuit board, a ground knife lock mechanism and a battery, the locking structure is installed at the top end of the control box, the power switch is installed at the bottom of the control box, and the control circuit board is installed in the control box. The electroscopic signal lead-in wire is electrically connected with the control circuit board and is led out from the control box; the battery is installed in the control box and supplies power to the control circuit board and the grounding knife lock mechanism. The ground knife lock mechanism is installed on the control box and the locking structure. And the control circuit board controls the grounding knife lock mechanism to lock or unlock according to a signal introduced by the electroscopic signal lead-in wire. The five-prevention locking device can be additionally arranged on all equipment, without a five-prevention locking device, of a high-voltage switch cabinet, can also be arranged in a power distribution room and a European-style box transformer high-voltage switch cabinet, and can be compatible with live-line displays of various brands. The device can effectively prevent a worker from mistakenly operating and entering a live-line interval, and greatly reduces the possibility of electrical misoperation.

A distribution transformer prefabricated connection line with a closed insulating cover comprises a wire pole, the wire pole is provided with a drop-type switch, a lightning arrester and a transformer, the drop-type switch, the lightning arrester and the transformer are connected through a connection line body. The distribution transformer prefabricated connection line is characterized in that the connection line body comprises a main line copper tube, and a first plastic copper line penetrates into a main line copper tube, an electrical inspection grounding ring is connected with the side wall of the main line copper tube and comprises a grounding ring copper tube, the outer wall of the grounding ring copper tube and the outer wall of the main line copper tube are coated with a main line silicone rubber insulating layer, a bare electrical inspection grounding point is arranged on the lower portion of the electrical inspection grounding ring, one end of the first plastic copper line is connected with a first connection terminal which is connected with the drop-type switch, the outer wall of the portion, between the first connection terminal and the main line copper tube, of the first plastic copper line is coated with a first silicone rubber insulating layer, the other end of the first plastic copper line is connected with a second connection terminal which is connected with the transformer, the outer wall of the portion, between the second connection terminal and the main line copper tube, of the first plastic copper line is coated with a second silicone rubber insulating layer, the portion, located in the main line copper tube, of the first plastic copper line is a line core with a plastic wrapper stripped, the line core is connected with a core of a third plastic copper line, and the outer wall of the third plastic copper line is coated with a third silicone rubber insulating layer.

The invention discloses an intelligent security management and control system for transformer station overhaul operation, and belongs to the technical field of transformer station security managementand control equipment. The system includes a security management and control host, a rolling shutter type display screen and security prompting devices; the security management and control host includes a first processor, and a first memory, a reading module used for updating transformer station overhaul operation information in the first memory and a first sound module which are separately connected to the first processor; the rolling shutter type display screen includes a display part which is made by a flexible material and can be rolled into a reel; and the number of the security promptingdevices is more than one, and the security prompting devices include a second processor, and a second memory, a proximity sensor, a second projection module and a second sound module which are separately connected to the second processor. The system can improve the deficiency of the security management and control means of existing transformer station overhaul operation; the system is convenientin carrying and usage, and visual in display; and the system is not limited by operation sites, and can reduce visual dead angles and mitigate the burdens of security monitoring personnel.

A high-voltage test alarm comprises an alarm starting return circuit and an alarm module. The alarm starting return circuit comprises a relay, a remote control module, a starting return circuit direct current power source and a relay normally open contact. A relay is connected between a control box of an alternating current withstand voltage instrument set device and a switch in parallel, wherein the switch is used for controlling a power source of the control box of an alternating current withstand voltage instrument. The starting return circuit direct current power source, and the relay normally open contact and the remoter control module are connected in series to form an electric return circuit. The alarm module is installed on a transformer voltage-sharing ball of the alternating current withstand voltage instrument set device by means of insulation process. The alarm module comprises a signal receiving module, an alarm direct current power source, a light alarm module and an audible alarm, wherein the light alarm module and the sound alarm module are connected with each other in parallel to form a parallel branch, and then the parallel branch is connected with the alarm direct current power source in series through the signal receiving module. The high-voltage test alarm is applicable to the field of electric power project (electric test) and capable of effectively avoiding occurrence of person electric shock accidents in the process of the high-voltage tests.

The invention provides a mechanical arm for remote live tree cutting and an application method. The mechanical arm is characterized by comprising a fixing mechanism, a first swing mechanism, a secondswing mechanism, an execution mechanism, a wireless signal transmission module and a control system, wherein the first swing mechanism comprises a large arm base fixedly connected with the fixing mechanism, a large arm hinged with the large arm base in a first plane, and a first power mechanism for controlling the large arm to swing; the second swing mechanism comprises a small arm base, a small arm, a second power mechanism for controlling the small arm base to slide and a third power mechanism for controlling the small arm to swing; the small arm base is connected with the large arm througha sliding chute in the first plane; the small arm is hinged with the small arm base in a second plane and is perpendicular to the large arm; and the execution mechanism is fixed at the tail end of thesmall arm. The complete set of result is good in flexibility, high in versatility and high in safety, and potential safety hazards to persons and equipment and other problems in cutting of large trees below a live running line corridor at present are avoided.

The invention provides a control system for an approaching-proof laser security scanning alarm of a high-rise electrified body of a transformer substation. The sensitivity of an alarm demanded by the design on the premise of reliably stabilizing operation is achieved through a main message loop broadcasting mechanism so that the technical design requirements of the alarm are finally met. According to the control system provided by the invention, the personal electric shock, which may be caused by a large-size construction machine in construction operation below the electrified body, can be solved, so that the heavy and large damages on the human body can be avoided; and the reliability of the operation process of a power grid is improved; and meanwhile, the fault of the power grid, which may be generated when the mechanical machine excessively approaches the electrified body, can be avoided.

The invention relates to a metallic inner-thread water pipe joint facilitating equipotential line connection. The metallic inner-thread water pipe joint comprises a water pipe joint, wherein a metallic internal-thread joint is arranged in the water pipe joint through integral injection molding, a metallic bump is integrally formed on the outer side surface of the metallic internal-thread joint, a tightening thread hole is formed in the outer end surface of the metallic bump in an axial direction, and a connection hole communicated with the inner end of the tightening thread hole is formed in the outer side surface of the metallic bump in a radial direction; during using, one end of a wire extends into the connection hole, the tightening wire is screwed into the tightening thread hole by a tightening screw, and the other end of the wire is connected with an equipotential device which is pre-embedded into the wall and is grounded. The connection structure is safe and reliable, the wire is not prone to falling off, and human body electric-shock safety accidents caused by electric leakage of an electric heater in a toilet, thunder and lightning, static electricity and the like are effectively prevented. The metallic inner-thread water pipe joint is firm in connection, safe, attractive, low in processing cost, easy to operate and suitable for being used on a plastic water pipe fitting.

The invention discloses an electric test low-voltage intelligent power supply box, comprising a box body, wherein a box cover integrally formed with the box body is arranged on the box body. The hingeof the box cover and the box body is provided with a waterproof groove. The inside of the box is divided into a power line storage tank and an electric appliance installation storage tank. The notchof the electric appliance mounting storage tank is provided with a disk surface covering the notch. The low-voltage intelligent power supply box of the electric test completely solves the damage of valuable test instruments and equipment caused by misconnection of the test power supply. At the same time, the personal electric shock accident of the test instrument operator is avoided, and the personal safety of the test operator is improved. The intelligent prompt of the low-voltage intelligent power supply box further improves the safety management level of the site.

The invention discloses a security isolation device for overhauling of a distribution board. The device comprises a locking information module, a judgement module and an output module, wherein the locking information module is used for generating locking information of the distribution board according to locking states of a power supply grounding knife-switch, a load grounding knife-switch and a bus grounding knife-switch; the judgement module is used for inputting locking information into preset logics and judging whether overhauling of the distribution board under the locking condition corresponding to the locking information is safe, and besides, the preset logics are the logics that no electric shock hazard exists during overhauling of the distribution board; the output module is usedfor outputting overhauling allowing information of the distribution board according to a judgement result of the judgement module, and besides, the overhauling allowing information is optical information and / or acoustic information. By means of the security isolation device, original complicated isolation locking operations without logic relations, which are managed through labels and locks, can be changed into computer automatic logic judgement, and the electric shock accident of people is thoroughly avoided. Besides, in the isolation operation process, the isolation progress can be seen froma display screen at any time, and workers can conveniently understand information.