533results about "Earthing arrangements" patented technology

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 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 discloses a novel wiring board for a power distribution cabinet. The novel wiring board comprises a first part and a second part, wherein two connecting plates are symmetrically welded to two sides of each of the first part and the second part and are fixedly connected through a connecting bolt; two alignment rods are symmetrically welded to the upper surface of the second part, three mounting pieces are welded to lower part of the second part in an equal interval manner, and mounting through holes are formed in the surfaces of the mounting pieces; and a plurality of wire clamping slots are formed in one surface, opposite to the second part, of the first part in an equal interval manner, wire clamping boards are connected in the wire clamping slots through clamping springs, the surfaces of the wire clamping boards are arc-shaped structures, and limiting sliding plates are symmetrically welded to two sides of the wire clamping boards. According to the novel wiring board, the wire clamping boards are connected in the wire clamping slots through the clamping springs, so that electric wires in the power distribution cabinet can be stably clamped by virtue of the novel wiring board, and the safety of the novel wiring board is higher.

The invention discloses an anti-static damping dustproof power distribution cabinet. The power distribution cabinet comprises a cabinet body, wherein a base is arranged at the bottom of the cabinet body, base fixing lugs are fixedly connected with the left end and the right end of the base, and through grooves are formed in the base fixing lugs on the two sides; a clamping groove is formed in thetop of the cabinet body, and the interior of the clamping groove is clamped with one end of a clamping rod; the other end of the clamping rod is fixedly connected with the bottom of the inner wall ofan anti-static power grid cover, a supporting plate is fixedly connected with the bottom of the cabinet body, and a balance base is fixedly connected with the bottom of the supporting plate; the top of the cabinet body is fixedly connected with a fixing rod. The anti-static damping dustproof power distribution cabinet can effectively eliminate static electricity, influences of the static electricity on the power distribution cabinet are avoided, the ventilation and heat dissipation states in the cabinet body can be guaranteed, dust can be effectively prevented, and normal work of the power distribution cabinet is guaranteed; in addition, effective damping can be achieved, damage of the base to the cabinet body is prevented, and the service life of the power distribution cabinet is prolonged.

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.

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 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 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.

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.