535results about "Earthing arrangements" patented technology

The invention provides a comprehensive power supply system with a remote monitoring function. The comprehensive power supply system comprises a box, wherein the box comprises a base plate, wall bodies and a top cover, and a high-voltage room, a transformer room, a low-voltage room and an industrial personal computer are arranged in the box; in a box-type substation, the high-voltage room, the transformer room and the low-voltage room are provided with doors and windows, and exhaust fans are arranged on the windows, so that natural ventilation and mechanical ventilation are combined, and maintenance is convenient; the wall bodies and clapboards on the circumference of the substation are respectively provided with inner-layer steel plates and outer-layer steel plates, a cavity is formed between each inner-layer steel plate and outer-layer steel plate, and fireproof sound-insulation cotton is arranged in each cavity; and radiation heat-dissipation cooling coating coats the surface of each outer-layer steel plate. The radiation heat-dissipation cooling coating can radiate object heat and achieve heat-dissipation waterproof functions; and the radiation heat-dissipation cooling coating can automatic radiate the heat of the coated object to an atmospheric space, reduces surface and interior temperature of the box-type substation and also achieves a soundproof function.

PCT No. PCT / EP96 / 05787 Sec. 371 Date Jul. 15, 1998 Sec. 102(e) Date Jul. 15, 1998 PCT Filed Dec. 20, 1996 PCT Pub. No. WO97 / 26689 PCT Pub. Date Jul. 24, 1997A device for electrically connecting the frame of a switching cabinet in which the cabinet housing is connected to the door by contact elements which are thereby electrically connected to the frame sections of the frame-like borders of the cabinet housing facing the door and are supported resiliently as well as electrically against the closed door. Specially designed contact springs can be used to create contacts between a subsequently fitted standard switching cabinet provided with a surface protection layer and the frame or cabinet housing in the door closure area.

The invention relates to the field of transformer maintenance safety, in particular to an anti-misoperation ground protection mechanism for a dry type transformer. The anti-misoperation ground protection mechanism for the dry type transformer comprises the transformer, a shell outside the transformer, a ground operation mechanism, a protection mechanism and a control mechanism; the ground operation mechanism comprises an operation connecting rod and a ground knife switch in the shell, an operation mechanism of the ground knife is connected with one end of the operation connecting rod, and the other end of the operation connecting rod penetrates out of an operation hole in the shell; the protection mechanism comprises a baffle and a first electromagnetic lock, the baffle is arranged on one side of the operation hole, and the first electromagnetic lock controls the baffle to shield the operation hole; the control mechanism comprises an electrified display arranged on the shell, the electrified display comprises three electrified sensors and a display body, the three electrified sensors are connected with wire inlet ends of a three-phase wire on a high-voltage side of the transformer respectively, and the display body is arranged outside the shell. The anti-misoperation ground protection mechanism for the dry type transformer has the advantages that during outage for maintenance, the ground knife switch can be operated outside the shell of the transformer to finish reliable grounding of the transformer, and accordingly personal safety of maintainers can be guaranteed.

A bus bar in which the noise of an apparatus connected to a bus bar is absorbed by the frame to reduce the noise propagated and radiated from the power feed cable and in which the apparatus may be reduced in size to achieve space saving while being reduced in cost. A plurality of power source layers and a plurality of frame grounding layers are arranged neighboring to one another with dielectric layers in-between, while a plurality of frame grounding layers are arranged neighboring to each other with dielectric layers in-between to provide a multi-layered structure including the frame grounding layers. The frame grounding layers are contacted with a fastener with a casing of a frame apparatus in surface contact to constitute a stable grounding of low impedance, while absorbing the noise proper to the insulating layer by interlayer capacitative coupling.

The invention discloses a transformer substation lightning protection device convenient to detach, assemble and maintain. The transformer substation lightning protection device comprises a base, a supporting box body, an angle adjusting box body, a lightning protection ball and a lightning rod. A lifting plate is arranged in the supporting box body in a vertical sliding mode. The stands are symmetrically fixedly arranged on the upper surface of the middle of the lifting plate. The tops of the two stands are each provided with an inclined face. The ends of a telescopic rod on an electric push rod are each provided with a supporting column. The bottom end of each supporting column is provided with a guide slide wheel. The guide slide wheels are arranged on the inclined faces in a sliding mode. The bottom of the lifting plate is connected with an inner cavity bottom plate of the supporting box body through a plurality of springs. A hinge base is fixedly arranged on the right side wall ofan inner cavity of the angle adjusting box body. A supporting plate is rotationally arranged on the hinge base in a hinged mode. A guide column is fixedly installed on the outer end face of a rotatingplate. The supporting plate is arranged on the circumference of the guide column in a sliding and sleeving mode. The transformer substation lightning protection device is simple and reasonable in structure, convenient to move, convenient to detach, assemble and maintain, beneficial for angle adjustment, flexible to use and suitable for use and popularization.

The invention discloses an interlocking device of a metal-enclosed switchgear grounding switch and a cable room door, comprising a bracket part, a driver plate, a mechanism stopper and a locking branch part. The upper part of the bracket part is matched with the driver plate, and the lower part of the bracket part is matched with the cable room door. The driver plate is connected with the locking branch part which can cover an operational shaft of the grounding switch. The mechanism stopper is fixed on the operational shaft of the grounding switch and is matched with the driver plate. The bracket of the bracket part is of L-shaped multiple-flange structure. Two L-shaped adjacent flanges of the bracket are provided with a rectangular slot. The driver plate can be inserted into the rectangular slot. The lower end of the other L-shaped edge of the bracket is provided with a hole. A lock catch plate is installed by a treaded pin and rotates around the treaded pin which is taken as a basic moving point. The V shape of the upper end part of the lock catch plate is matched with the lower end part of the driver plate. The lower part of the lock catch plate is provided with cylindrical pins. The secondary cylindrical pin is provided with a reset spring, and the first cylindrical pin is matched with a lug which is fixed on the cable room door.

The invention discloses 24kV solid insulated fully-closed switch equipment, which is applied to an alternating current trunk line or an alternating current distribution network and comprises a three phases of high-voltage load switch units; each phase of high-voltage load switch unit comprises a switch insulated hood fixed in a box body, a driving hood, an isolating switch, an earthed switch and a vacuum switch; the upper part of the three phases of switch insulating hoods are connected with the driving hood which is formed by connecting an upper half cylinder and a lower half cylinder; and the isolating switch, the earthed switch and the vacuum switch are arranged in the switch insulating hood and the driving hood. The invention has the advantages of compact structure, low cost, safe use and easy maintenance and debugging.

The invention provides a ground wire locking device and a locking method thereof. The ground wire locking device mainly comprises a first lock body and a second lock body. The first lock body comprises a first working face, and the second lock body comprises a second working face. A first ground wire fixed mounting clamping piece part and a connection fixing device of a first lock casing are positioned on the first working face. The second ground wire fixed mounting clamping piece part and a connection fixing device of a second lock casing are positioned on the second working face. A two-value RFID chip is provided in an inner cavity of the second lock casing. In application, the first lock body and the second lock body are separately installed on two ends of a temporary ground wire, or the second lock body is installed on the temporary ground wire and the first lock body is installed on another object. When the ground wire locking device is in a locked state, the first lock body and the second lock body can not be separated; that is, the two ends of the ground wire can not be separated or move freely, and can only be unlocked and separated by using a computer key. A function realized by the two-value RFID chip is to provide different RFID chip values. When the RFID chip values are identified by the computer key, whether the first lock body and the second lock body are in the locked state can be known.

The invention provides a comprehensive power supply system with a remote monitoring function. The comprehensive power supply system comprises a box, wherein the box comprises a base plate, wall bodies and a top cover, and a high-voltage room, a transformer room, a low-voltage room and an industrial personal computer are arranged in the box; in a box-type substation, the high-voltage room, the transformer room and the low-voltage room are provided with doors and windows, and exhaust fans are arranged on the windows, so that natural ventilation and mechanical ventilation are combined, and maintenance is convenient; the wall bodies and clapboards on the circumference of the substation are respectively provided with inner-layer steel plates and outer-layer steel plates, a cavity is formed between each inner-layer steel plate and outer-layer steel plate, and fireproof sound-insulation cotton is arranged in each cavity; and radiation heat-dissipation cooling coating coats the surface of each outer-layer steel plate. The radiation heat-dissipation cooling coating can radiate object heat and achieve heat-dissipation waterproof functions; and the radiation heat-dissipation cooling coating can automatic radiate the heat of the coated object to an atmospheric space, reduces surface and interior temperature of the box-type substation and also achieves a soundproof function.

The invention relates to the technical field of solid dead ring main units and discloses a solid dead ring main unit. The ring main unit comprises a cabinet body, cabinet doors, a door lock mechanism, a two-station mechanism, a three-station on-off operation mechanism and an embedded pole, wherein the embedded pole comprises an insulator, a two-station vacuum arc-extinguishing chamber, a three-station vacuum arc-extinguishing chamber, a first insulation draw bar and a second insulation draw bar. The ring main unit has the advantage of achieving full solid insulation of the embedded pole, and therefore full solid insulation of the solid dead ring main unit can be achieved and the solid insulation ring main unit can promote high-pressure switch equipment to develop towards miniaturization.

The invention relates to the field of switchgears, in particular to a switch cabinet and a cabinet door interlocking device thereof. The cabinet door interlocking device comprises a spring bolt, a grounded interlocking part and a mechanism interlocking part, wherein the grounded interlocking part is matched with the spring bolt in a stopping way when a ground switch is in a non-grounding switch-on state in order to prevent the spring bolt to move to an unlocking position, and a cabinet door of the switch cabinet cannot be opened; and the mechanism interlocking part is matched with the spring bolt in a stopping way when a switching mechanism is in a switch-off state in order to prevent the spring bolt to move to the unlocking position, and the cabinet door of the switch cabinet cannot be opened as well. Compared with an existing cabinet door interlocking device, the cabinet door interlocking device disclosed by the invention has the advantages that the cabinet door can only be opened when the ground switch in the switch cabinet is in a grounding switch-on state and the switching mechanism is in the switch-off state, so that the problems of poor safety and poor reliability during repairing of the switch cabinet since the cabinet door interlocking device of the switch cabinet cannot ensure that the cabinet door of the switch cabinet can only be opened when the switching mechanism is in the switch-on state are solved.

An enclosure for electrical equipment is provided. The enclosure includes a frame, a first plate, and a first member coupled to the frame and configured to receive the first plate. The first plate is configured to receive a transformer, movable between a first position and a second position, at least partially supported by the first member when the first plate is in the first position, and offset from the first member when the first plate is in the second position.

This invention relates to one insulation puncture earth ring, which comprises earth ring body and is characterized by the following: earth ring body down part is of connection ring with top part as main connection part connected with clamper through connection bolt; the main connection part and wire inner arc are set with puncture. The invention has the following advantages: without peeling off cable insulation puncture method with easy installation and reliable connection without destroying cable or wire insulation protection layer.

The invention discloses a transformer neutrality point combination electric device comprising a base (1), wherein the base (1) is grounded and provided with an insulating support post (2), and the insulating support post (2) is provided with a horizontal high-voltage arm (8'), and the horizontal high-voltage arm (8') is connected with a transformer neutrality point (N) and provided with a fixed contact (7); the base (1) is also provided with a grounding post (5), the grounding post (5) is provided with a horizontal grounding arm (9') which is sleeved with a grounding sleeve pipe (10), an insulating bushing is arranged between the grounding arm (9') and the grounding sleeve pipe (10), and the grounding sleeve pipe (10) can slide relative to the grounding arm (9'); the high-voltage arm (8') is provided with a high-voltage electrode (8), the grounding arm (9') is provided with a grounding electrode (9), the high-voltage electrode (8) and the grounding arm (9') are coaxial, oppositely arranged and form a protection gap (J), and the grounding sleeve pipe (10) is provided with a division and combination adjusting device. The invention has simple structure and high aggregation degree.

A site grounding and bonding system provides for the grounding of a plurality of facilities at a field site using a ground box through which electrical connections are made between one or more ground devices and a distribution panel electrically connected to the facilities. The grounding devices may include one or more grounding plates and one or more ground rods buried beneath the earth. A bumper pole may be placed adjacent to the ground box and bonded to the grounding devices through the ground box. The system allows for the safe grounding of a number of facilities at a site without the necessity of placing separate grounding rods and connecting conductors for each facility.

The invention discloses a 450 mm-wide small switch cabinet and relates to a switch cabinet. According to the 450 mm-wide small switch cabinet, an insulation plate and a support plate are fixed on a shell, the switch cabinet is divided into three chambers, namely a bus chamber, a circuit breaker chamber and a cable chamber from top to bottom in sequence, by the insulation plate and the support plate, a disconnecting switch and a wall bushing are installed in the bus chamber, a vacuum circuit breaker and an operation mechanism are located in the circuit breaker chamber and installed on the support plate, a current transformer penetrates through the support plate, an earthing switch and an overvoltage protector are installed in the cable chamber, a primary loop of the vacuum circuit breaker is connected with the disconnecting switch and the current transformer through copper bars, one end of an operation connecting lever of the operation mechanism is connected with a transmission connecting lever of the disconnecting switch through a connecting rod, and the other end of the operation connecting lever of the operation mechanism is connected with a transmission connecting lever of the earthing switch. According to the 450 mm-wide small switch cabinet, the size of the switch cabinet is reduced greatly, the primary conductive loop is shortened greatly, the resistance of a major loop is reduced, the occupied area is reduced, cost is saved, and requirements for miniaturization of power distribution equipment are met.

A site grounding and bonding system provides for the grounding of a plurality of facilities at a field site using a ground box through which electrical connections are made between one or more ground devices and a distribution panel electrically connected to the facilities. The grounding devices may include one or more grounding plates and one or more ground rods buried beneath the earth. A bumper pole may be placed adjacent to the ground box and bonded to the grounding devices through the ground box. The system allows for the safe grounding of a number of facilities at a site without the necessity of placing separate grounding rods and connecting conductors for each facility.

A motor control center system is provided. The system includes an electrical enclosure configured to house one or more compartments. The electrical enclosure includes a vertical ground bus adjacent to the one or more compartments. The component unit is removably disposed within a compartment of the electrical enclosure. The system also includes a ground stab system disposed on an exterior surface of the component unit. The ground stab system is configured to operatively couple with the vertical ground bus when the component unit is inserted into the compartment of the electrical enclosure, and the ground stab system includes an alignment bracket configured to align the ground stab system with the vertical ground bus.

A safe method and apparatus for interrupting electric utility ground and open neutral fault currents and isolating customer's grounding system from utility's neutral utilizing thermal-magnetic circuit breaker pole(s) (18) electrically connected between the neutral bus / lug(s) (38) and the equipment ground bus / lug(s) (32). In addition the grounding electrode conductor (26) is connected directly to the equipment ground bus / lug(s) (32). The method of overcurrent protection for grounding electrode conductors is applicable to electrical installations where from one to six main circuit breakers are used. Circuit breaker enclosure(s) (10) are bonded to the equipment ground bus / lug(s) (32). This method is applicable to load centers, panelboards, and switchboards rated 600 volts or less, single phase or three phase. Ampere ratings vary from 20 amperes to 4,000 amperes. Short circuit ratings vary from 10,000 to 200,000 RMS symmetrical amperes.

The invention relates to the field of temporary grounding, in particular to a temporary grounding device of a distribution box substation and a grounding method. The temporary grounding device of the distribution box substation is characterized in that when discharging is carried out on a phase A, a phase B and a phase C, a discharging caution link is added. The grounding method comprises the following specific steps of (1) carrying out a check to ensure that conductor hanging parts and a wire clamp are reliably connected with a soft copper wire, and insulating rods meet the requirement for insulation; (2) carrying out a check on a live wire according to the requirements of site rules before operation; (3) hanging the first conductor hanging part on a bus of the phase A after the wire clamp is grounded, wherein when a reliable connecting loop is formed by a bus of the distribution box substation and a ground wire, a discharging indication alarm device on the first conductor hanging part can give out sounds with high decibel to low decibel, when sounds are not given out, or the given sounds are intermittent, a hanging point is in poor contact, and discharging of the phase B or the phase C is carried out after discharging of the bus of the phase A is accomplished. Compared with the prior art, the temporary grounding device of the distribution box substation and the grounding method have the advantages that convenience of operation of temporary grounding and reliability of grounding are ensured, and the installing efficiency of the ground wire is improved when an electric power circuit is in outage operation.

The invention relates to an electric control cabinet with a dehumidification function. The electric control cabinet comprises a cabinet body, and is characterized in that an inversed V-shaped top cover is arranged at the top of the cabinet body; thermal baffles are arranged on two side plates of the inversed V-shaped top cover; a water guiding groove is formed in the edge of the bottom end of the inversed V-shaped top cover; outriggers are arranged at the bottom of the control cabinet and fixed on a base plate of the floor; an air suction funnel is arranged in the cabinet body and connected with a pipeline; the pipeline is connected with a draught fan; a moisture absorption cavity and a drying cavity are arranged in the pipeline in sequence; a moisture absorption layer is arranged in the moisture absorption cavity; an electric heater strip is arranged in the drying cavity; the electric heater strip and the draught fan are connected to a power supply through an electromagnetic relay; the electromagnetic relay is connected with a controller; and the controller is connected with a humidity sensor which is arranged in the control cabinet.

An enclosure for electrical equipment is provided. The enclosure includes a frame, a first plate, and a first member coupled to the frame and configured to receive the first plate. The first plate is configured to receive a transformer, movable between a first position and a second position, at least partially supported by the first member when the first plate is in the first position, and offset from the first member when the first plate is in the second position.

The invention relates to a mining flameproof dual-power multi-loop combination switch. The invention is characterized in that the invention comprises a shell; the upper end of the shell is provided with two independent flameproof wiring chambers and the middle thereof is provided with two independent flameproof main chambers; two isolation phase-change switches are arranged in the two independent flameproof main chambers respectively and respectively connected with the wiring terminals which are arranged in the two independent flameproof wiring chambers at the upper end; grounding terminals are arranged at the lower end and on the top of the shell respectively; the front door of the shell is provided with a starting button, a setting button and a comprehensive protector respectively; one side of the shell is provided with a stopping label and a steering indicating label; an electricity prevention plate is arranged on the top of two independent flameproof wiring chambers. The invention has the advantages of reliable performance, convenient maintenance, ensuring the requirement of the underground ventilation of coal mine, preventing the collection of gas, and avoiding the occurrence of accidents.

The invention relates to the field of temporary grounding, in particular to a temporary grounding device of a distribution box substation and a grounding method. The temporary grounding device of the distribution box substation is characterized in that when discharging is carried out on a phase A, a phase B and a phase C, a discharging caution link is added. The grounding method comprises the following specific steps of (1) carrying out a check to ensure that conductor hanging parts and a wire clamp are reliably connected with a soft copper wire, and insulating rods meet the requirement for insulation; (2) carrying out a check on a live wire according to the requirements of site rules before operation; (3) hanging the first conductor hanging part on a bus of the phase A after the wire clamp is grounded, wherein when a reliable connecting loop is formed by a bus of the distribution box substation and a ground wire, a discharging indication alarm device on the first conductor hanging part can give out sounds with high decibel to low decibel, when sounds are not given out, or the given sounds are intermittent, a hanging point is in poor contact, and discharging of the phase B or the phase C is carried out after discharging of the bus of the phase A is accomplished. Compared with the prior art, the temporary grounding device of the distribution box substation and the grounding method have the advantages that convenience of operation of temporary grounding and reliability of grounding are ensured, and the installing efficiency of the ground wire is improved when an electric power circuit is in outage operation.

The invention discloses a detachable antistatic safety device of a power supply cabinet. The detachable antistatic safety device comprises an insulating cabinet plate (1) and two L-shaped metal mounting plates (3), wherein the metal mounting plates (3) are fixed on the vertical end face of the insulating cabinet plate (1) through a screw I (6), a rotary rod (2) and a metal connecting plate (4) are connected between the two metal mounting plates (3), a spring (5) is fixed on the rotary rod (2) and located between the two metal mounting plates (3), any one of the two metal mounting plates (3) is provided with a wiring hole (7), and two ends of the metal connecting plate (4) are fixed between the two metal mounting plates (3) through screws II (8). The detachable antistatic safety device of the power supply cabinet is simple in structure, good in insulation effect and convenient to detach.

The invention relates to a three-station solid insulating fully-sealed switch grounding mechanism, belonging to grounding devices of electric switches. The three-station solid insulating fully-sealed switch grounding mechanism comprises three grounding post devices, each grounding post device comprises an insulation body, the insulation body is provided with an open slot containing insulating oil, a contact is fixedly sealed at the bottom of the insulation body, a connecting slot is arranged at the upper end of the contact, the insulation body is connected with a flange assembly body, and a grounding rod is inserted in the flange assembly body. The upper ends of the three grounding rods pass through a grounding linked bracket and then are screwed with a ground soft copper belt, the grounding linked bracket is provided with a slot hole, a crank connecting shaft is arranged in the slot hole in an insertion manner, the front end of the crank connecting shaft is vertically connected with one end of a spring crank, the other end of the spring crank is vertically connected with the back end of a grounding shaft, a spring crank front side plate is hinged with a first support through a pin shaft, the two ends of a grounding spring are fixed on the first support and a second support, and the second support is movably connected with a grounding spring support frame arranged on a mechanism support plate. The three-station solid insulating fully-sealed switch grounding mechanism disclosed by the invention has the advantages of simple and compact structure, small volume and capability of reducing the manufacturing cost of an ring main unit, and is simple in operation and safe in use.

The invention discloses a vacuum three-station load switch and the method for manufacturing, the same, wherein, a ground contact room(3) is arranged over an isolating contact room(5); a shield element (8) is arranged around an operation part(9) of an isolating switch; a link copper busbar(4) is arranged between the ground contact room(3) and the isolating contact room(5); a chain type conducting ring(12) is arranged at one end of the isolating contact room(5). The manufacturing method of the invention includes the following steps: the subassembly of the load switch is arranged in a mould after installed and linked; epoxy resin is used for die-casting the subassembly into an integrated body; a conductive silicon rubber layer (14) is coated or printed on the surface around an epoxy resin cover(2); after totally sulfurized, the silicon rubber (14), the surface resistance is from 5K ohm to 20 K ohm. The invention has the advantages of smaller size, convenient installation, stronger environment adaptability, good insulating performance, alternative insulating performance, safe and reliable operation, convenient maintenance and replacement.