A column mounted combined electrical appliance

Abstract

The present invention provides a pole-mounted combined electrical appliance, comprising: a box, two sets of bushings, an insulating body, an isolating switch and a circuit breaker; partial structures of the two sets of bushings are respectively inserted on both sides of the box, one set of bushings is provided with a first measuring circuit, and the other set of bushings is provided with a second measuring circuit; the insulating body is placed in the box, and the interior of the box is divided into a first chamber, a second chamber, a third chamber and a fourth chamber, and a first conductor is provided in the first chamber, and the first conductor is connected to the first measuring circuit; the static contact of the isolating switch is located in the first chamber and contacts the first conductor, the moving contact of the isolating switch is located in the fourth chamber, and the conductive rod of the isolating switch is exposed in the area between the first chamber and the fourth chamber; the circuit breaker is placed in the third chamber, and is connected to the second measuring circuit through the second conductor. The present invention has a compact structure, the isolating switch break is an obvious disconnection point, and the insulation is reliable; and the insulation level between the isolating switch breaks is relatively stable.

Description

Technical Field

[0001] The invention relates to the technical field of electric power engineering, and in particular to a pole-mounted combined electrical appliance. Background Art

[0002] In the prior art, pole load switches, pole circuit breakers, pole isolating switches, etc. generally exist independently, and pole load switches and circuit breakers mostly use vacuum arc extinguishing chambers as arc extinguishing and isolating fractures. In this way, due to the possibility of gas leakage, vacuum arc extinguishing chambers cannot be used as safe isolating fractures, which brings risks and troubles to maintenance; or SF6 gas is used to bear the insulation and arc extinguishing functions, which does not meet environmental protection requirements. In actual applications, for the parts that maintenance personnel need to touch, it is necessary to isolate the live parts of other non-maintenance sections through isolating fractures, and the maintenance parts are grounded. For pole vacuum switch equipment, this isolation is often achieved by installing another isolating switch on the line, and the grounding of the maintenance parts is completed by manually connecting the grounding wire. Such an additionally installed isolating switch requires the installation of both a pole vacuum switch and an isolating switch on a pole, which makes the layout and wiring complicated, and it is impossible to achieve the interlocking of the pole vacuum switch and the isolating switch, and it is not convenient for live maintenance in the narrow space on the pole. It can be seen that the external integration of existing pole-mounted combination electrical appliances has poor environmental adaptability of the isolating switch, and the integration with equipment such as transformers and lightning arresters is not high, which cannot meet the use requirements of power distribution distributed automation. Summary of the invention

[0003] In view of this, the present invention proposes a pole-mounted combined electrical appliance, aiming to solve the problems that the existing pole-mounted combined electrical appliances cannot integrate an isolating switch internally, the insulation level of the break is difficult to ensure, and the connection error between the external measurement circuit and the internal conductor is large.

[0004] The present invention provides a pole mounted combined electrical appliance, comprising:

[0005] Box;

[0006] Two groups of sleeves, partial structures of the two groups of sleeves are respectively inserted on both sides of the box body, a first measuring circuit is passed through one group of the sleeves, and a second measuring circuit is passed through the other group of the sleeves;

[0007] an insulating body, which is placed in the box body and divides the interior of the box body into a first chamber, a second chamber, a third chamber and a fourth chamber, wherein a first conductor is arranged in the first chamber and the first conductor is connected to the first measurement circuit; a second conductor is arranged in the second chamber and the second conductor is connected to the second measurement circuit;

[0008] An isolating switch is placed in the box, and the static contact of the isolating switch is located in the first chamber and in contact with the first conductor, the moving contact of the isolating switch is located in the fourth chamber, and the conductive rod of the isolating switch is exposed in the area between the first chamber and the fourth chamber;

[0009] A circuit breaker is placed in the third chamber and connected to the second measuring line through the second conductor, and is used for switching on and off normal current of the line or cutting off fault current.

[0010] Furthermore, in the above-mentioned pole-mounted combination electrical appliance, the isolating switch comprises: an isolating switch operating shaft, an isolating switch insulating pull rod, an isolating switch conductive rod, an isolating switch static contact and an isolating switch moving contact; wherein,

[0011] One end of the insulating pull rod of the isolating switch is connected to the isolating switch operating shaft, and the other end is connected to the isolating switch conductive rod. The isolating switch operating shaft drives the insulating pull rod of the isolating switch to operate and drive the isolating switch conductive rod to move between the static contact of the isolating switch and the moving contact of the isolating switch to achieve the conduction and disconnection of the static contact of the isolating switch and the moving contact of the isolating switch.

[0012] Furthermore, in the above-mentioned pole-mounted combination electrical appliance, a guide block is embedded in the end of the isolating switch conductive rod close to the isolating switch static contact, and a plurality of first guide rings are provided on the end of the isolating switch conductive rod close to the isolating switch moving contact, and each of the first guide rings is distributed on both sides of the isolating switch moving contact, and the guide block cooperates with the first guide rings to make the isolating switch static contact and the isolating switch moving contact centrally inserted on the isolating switch conductive rod.

[0013] Furthermore, in the above-mentioned pole-mounted combined electrical appliance, a plurality of ventilation holes are provided in the circumference of the guide block to prevent the insulating gas in the box from being sealed.

[0014] Furthermore, in the above-mentioned pole-mounted combined electrical appliance, the circuit breaker comprises: a circuit breaker operating shaft, a circuit breaker insulating pull rod and a vacuum interrupter; wherein,

[0015] One end of the insulating rod of the circuit breaker is connected to the moving end of the vacuum arc extinguishing chamber, and the spring inside the insulating rod of the circuit breaker is arranged close to the vacuum arc extinguishing chamber; the other end of the insulating rod of the circuit breaker is connected to the circuit breaker operating shaft, and the insulating rod of the circuit breaker is used to transfer the closing and opening energy of the circuit breaker operating shaft to the vacuum arc extinguishing chamber to control the closing and opening operations of the circuit breaker; the moving end of the vacuum arc extinguishing chamber is connected to the second measuring circuit, and the first measuring circuit that is conductive through the static contact of the disconnector and the moving contact of the disconnector is led out of the box through the vacuum arc extinguishing chamber.

[0016] Furthermore, in the above-mentioned pole-mounted combination electrical appliance, the two sets of bushings are both provided with guiding mechanisms for guiding the docking of the first measuring circuit with the first conductor, and the docking of the second measuring circuit with the second conductor.

[0017] Furthermore, in the above-mentioned column mounted combination electrical appliance, the guide mechanism comprises: a conductive tube, a guide sleeve, a second guide ring and a strap contact finger structure; wherein,

[0018] The conductive tube is provided with a first plug-in cavity and a second plug-in cavity at opposite ends thereof, the first measuring circuit is plugged into the first plug-in cavity; the first conductor is plugged into the second plug-in cavity, and a guide sleeve is sleeved between the first end of the first conductor and the inner wall of the conductive tube;

[0019] The second guide ring is arranged on the first conductor at a position away from the first end, and the area on the first conductor between the second guide ring and the guide sleeve is slidably provided with the watchband contact finger structure, and the guide sleeve, the second guide ring and the watchband contact finger structure cooperate to ensure reliable docking between the conductive tube and the first conductor.

[0020] Furthermore, in the above-mentioned pole-mounted combination electrical appliance, the strap contact finger structure is formed by stacking a plurality of strap contact fingers, and a spring is provided between each of the strap contact fingers to limit the displacement of each of the strap contact fingers on the first conductor.

[0021] Furthermore, in the above-mentioned pole-mounted combined electrical appliance, a lightning arrester and a voltage transformer are arranged in parallel on one side of the two sets of bushings located outside the box.

[0022] Furthermore, in the above-mentioned pole-mounted combination electrical appliance, the inner wall of the box body is provided with a flame retardant structure.

[0023] The present invention integrates the isolating switch and the circuit breaker into an insulating body of an overall frame structure, which has a compact structure and reduces the number of wiring terminals, making the wiring of the entire electrical appliance simpler. In particular, the conductive rod of the isolating switch is exposed in the space outside the insulating body, so that the break of the isolating switch is an obvious disconnection point to ensure reliable insulation; and the insulation level between the breaks of the isolating switch will not decrease due to changes in the state of the internal insulating gas, contamination on the surface of the insulating body, and metal debris generated by the operation of the isolating switch 4 deposited on the surface of the insulating body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0025] Figure 1 A schematic diagram of the external structure of a pole-mounted combined electrical appliance provided in an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of the internal structure of a pole-mounted combination appliance provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0027] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to be able to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] See also Figure 1 and Figure 2 The pole-mounted combination electrical device of the embodiment of the present invention comprises: a box body 1, two sets of bushings 2, an insulating body 3, an isolating switch 4 and a circuit breaker 5; wherein, partial structures of the two sets of bushings 2 are respectively inserted on both sides of the box body 1, a first measuring line 6 is passed through one set of bushings 2, and a second measuring line 7 is passed through the other set of bushings 2; the insulating body 3 is placed in the box body 1, and the interior of the box body 1 is divided into a first chamber, a second chamber, a third chamber and a fourth chamber, and a first conductor 8 is provided in the first chamber, and the first conductor 8 and the first measuring line 6 are connected to each other. docking; a second conductor 9 is provided in the second chamber, and the second conductor 9 is docked with the second measuring line 7; the isolating switch 4 is placed in the box body 1, and the static contact of the isolating switch 4 is located in the first chamber and contacts with the first conductor 8, the moving contact of the isolating switch 4 is located in the fourth chamber, and the conductive rod of the isolating switch 4 is exposed in the area between the first chamber and the fourth chamber; the circuit breaker 5 is placed in the third chamber, and is connected to the second measuring line 7 through the second conductor 9, and is used to switch the normal current in the line or cut off the fault current.

[0029] Specifically, the box body 1 can be made of metal and has a stepped layered structure. The box body 1 can be filled with insulating gas, such as non-greenhouse effect gas such as dry air, or SF6 gas.

[0030] The two sets of bushings 2 are both provided with a lightning arrester 23 and a voltage transformer 24 in parallel on one side outside the box body 1. The figure shows a three-phase independent structure, which can also be a three-phase integrated structure. The lightning arrester can effectively protect the first measurement circuit 6 and the second measurement circuit 7. The voltage transformer can be an electronic voltage sensor or an electromagnetic voltage transformer; the electric energy signal is collected by the electronic voltage sensor and transmitted to the energy storage element in the FTU (distribution switch monitoring terminal) through the first measurement circuit 6 and the second measurement circuit 7, which can drive the circuit breaker to operate (power off) in the case of power failure. Among them, the energy storage element can be an energy storage capacitor or a battery.

[0031] The inner wall of the box 1 is provided with a flame retardant structure. The flame retardant structure can be a flame retardant layer formed by coating a flame retardant material; or it can be a flame retardant plate made of a flame retardant material. The flame retardant structure is provided on the inner surface of the box 1, which greatly improves the arc resistance of the entire switchgear.

[0032] The bushing 2 may include: an insulating jacket and a voltage transformer (not shown in the figure), the voltage transformer is in direct contact with the outer surface of the first measurement circuit 6 or the second measurement circuit 7 or the voltage transformer is isolated from the first measurement circuit 6 or the second measurement circuit 7 by an insulating material, and the first measurement circuit 6, the second measurement circuit 7, the insulating jacket and the voltage transformer are coated and solidified into one by the insulating material. Voltage sensors are provided in both sets of bushings 2, which can respectively collect voltage data passing through the first measurement circuit 6 and the second measurement circuit 7 in real time.

[0033] The portions of the two sets of bushings 2 where the first measuring line 6 and the first conductor 8 are connected are both provided with shielding covers 21 for shielding the electric field.

[0034] The insulating body 3 is a frame structure made of solid insulating material, for example, it can be made of epoxy resin material. Current transformers 31 are provided on the inlet and outlet lines of the insulating body 3. The insulating body 3 divides the interior of the box 1 into four chambers. The first conductor 8 is laid in the first chamber, and one end of the first conductor 8 close to the bottom of the box 1 is connected to the static contact of the disconnector 4; the second chamber is arranged opposite to the second measuring line 7 to pass the second conductor 9. The circuit breaker 5 is laid in the third chamber. Among them, the fourth chamber is connected to the third chamber.

[0035] The static contact of the isolating switch 4 contacts the first conductor 8 to lead the first measuring line 6 out of the box 1 through the circuit breaker 5. The conductive rod of the isolating switch 4 is exposed in the area between the first chamber and the fourth chamber, so that the break of the isolating switch 4 is an obvious disconnection point. The insulation level of the break of the isolating switch 4 should be greater than the insulation level of the first measuring line 6 to the ground to ensure reliable insulation of the break; and the insulation level between the breaks of the isolating switch 4 will not decrease due to changes in the state of the internal insulating gas, contamination on the surface of the insulating body 3, and metal debris generated by the operation of the isolating switch 4 deposited on the surface of the insulating body 3.

[0036] It can be clearly seen from the above that the present invention integrates the disconnector 4 and the circuit breaker 5 into the insulating body 3 of the overall frame structure, which has a compact structure and reduces the number of wiring terminals, making the wiring of the entire electrical appliance simpler. In particular, the conductive rod of the disconnector is exposed in the space outside the insulating body 3, so that the disconnector 4 is an obvious disconnection point to ensure reliable insulation; and the insulation level between the disconnector 4 will not decrease due to changes in the state of the internal insulating gas, contamination on the surface of the insulating body 3, and metal debris generated by the operation of the disconnector 4 deposited on the surface of the insulating body 3.

[0037] Continue reading Figure 2 The isolating switch 4 includes: an isolating switch operating shaft 41, an isolating switch insulating rod 42, an isolating switch conductive rod 43, an isolating switch static contact 44 and an isolating switch moving contact 45; wherein, one end of the isolating switch insulating rod 42 is connected to the isolating switch operating shaft 41, and the other end is connected to the isolating switch conductive rod 43, and the isolating switch operating shaft 41 drives the isolating switch insulating rod 42 to operate and drive the isolating switch conductive rod 43 to move between the isolating switch static contact 44 and the isolating switch moving contact 45 to realize the conduction and disconnection of the isolating switch static contact 44 and the isolating switch moving contact 45.

[0038] Specifically, according to the spring load capacity and dynamic thermal stability test requirements, the isolating switch static contact 44 and the isolating switch moving contact 45 are both composed of a plurality of spring coils arranged at intervals. For example, two spring coils arranged at intervals are selected to increase the current carrying capacity. The isolating conductive rod is preferably a copper tube so that the current passes through the outer layer, which saves materials, reduces weight, and is easy to drive.

[0039] In order to ensure the length of the disconnecting switch, one end of the first chamber close to the bottom of the box body 1 is bent and extended outward from the length direction of the disconnecting switch conductive rod 43.

[0040] The connection between the isolating switch insulating operating rod and the isolating switch conductive rod 43 is a conical surface, and the side with a larger diameter of the conical surface is arranged close to the isolating switch conductive rod 43. Compared with the insulating operating rod in the prior art, the isolating switch insulating operating rod reduces the setting of the shed, making the processing more convenient, saving materials, and having better insulation performance in the horizontal direction.

[0041] A buffer spring structure (shown in the figure) is arranged on the operating shaft 41 of the isolating switch, and the switch is automatically closed after being operated at a certain angle, thereby reducing the operating force and facilitating operation by on-site personnel.

[0042] During actual operation, the operator applies external force to the external operating shaft of the box body 1 to drive the operating shaft of the isolating switch to rotate. While the isolating switch operating shaft rotates, it will drive one end of the isolating switch insulating rod 42 to move in a curve, and the other end of the isolating switch insulating rod 42 drives the isolating switch moving contact 45 to move in a straight line, thereby realizing the opening and closing of the isolating switch static contact 44 and the isolating switch moving contact 45.

[0043] Furthermore, a guide block 452 is embedded in one end of the isolating switch conductive rod 43 close to the isolating switch static contact 44, and a plurality of first guide rings 451 are provided on one end of the isolating switch conductive rod 43 close to the isolating switch moving contact 45, and each of the first guide rings 451 is distributed on both sides of the isolating switch moving contact 45, and the guide block 452 cooperates with the first guide rings 451 to make the isolating switch static contact 44 and the isolating switch moving contact 45 align and be inserted on the isolating switch conductive rod 43.

[0044] Specifically, one end of the isolating switch conductive rod 43 is connected to the first conductor 8 through a bolt, and the guide block is sleeved between the inner wall of the isolating switch conductive rod 43 and the head of the bolt; the other end of the isolating switch conductive rod 43 is connected to the isolating switch insulating pull rod 42 through a bolt, and two second guide rings 223 are sleeved on the outside of the isolating switch conductive rod 43, thereby ensuring that the isolating switch static contact 44 and the isolating switch moving contact 45 are coaxially arranged.

[0045] Preferably, a plurality of ventilation holes (not shown in the figure) are opened in the circumference of the guide block, and the ventilation holes are connected to the small space in the static contact 44 of the isolating switch to avoid the insulation gas in the static contact 44 of the isolating switch being closed.

[0046] Continue reading Figure 2The circuit breaker 5 comprises: a circuit breaker operating shaft 51, a circuit breaker insulating rod 52 and a vacuum arc extinguishing chamber 53; wherein, one end of the circuit breaker insulating rod 52 is connected to the moving end of the vacuum arc extinguishing chamber 53, and a spring 521 inside the circuit breaker insulating rod 52 is arranged close to the vacuum arc extinguishing chamber 53; the other end of the circuit breaker insulating rod 52 is connected to the circuit breaker operating shaft 51, and the circuit breaker insulating rod 52 is used to transfer the closing and opening energy of the circuit breaker operating shaft 51 to the vacuum arc extinguishing chamber 53 to control the closing and opening operations of the circuit breaker; the moving end of the vacuum arc extinguishing chamber 53 is connected to the second measuring circuit 7, and the first measuring circuit 6 conducted through the static contact 44 of the disconnector and the moving contact 45 of the disconnector is led out of the box body 1 through the vacuum arc extinguishing chamber 53.

[0047] Specifically, the disconnector movable contact 45 is connected to the vacuum interrupter 53 via the connecting conductor 11. The spring in the circuit breaker insulating pull rod 52 is close to one side of the interrupter, so that the driving mass is small and the output characteristic is good.

[0048] The end of the circuit breaker insulating rod 52 connected to the moving end of the vacuum interrupter 53 is also provided with a flexible connection, which is connected to the second conductor 9 through a bolt. The circuit breaker insulating rod 52 controls the expansion and contraction of the flexible connection to maintain electrical connection with the second conductor 9 when the circuit breaker is opened and closed.

[0049] The circuit breaker operating shaft 51 is sealed in the shell of the side wall of the box body 1, is not affected by the external environment, has strong environmental adaptability, and through the mechanism design, can achieve maintenance-free during the mechanical life.

[0050] In the above embodiments, the two sets of sleeves 2 are both provided with a guide mechanism 22 for guiding the docking of the first measuring line 6 and the first conductor 8 , and the docking of the second measuring line 7 and the second conductor 9 .

[0051] Specifically, the guide mechanism 22 includes: a conductive tube 221, a guide sleeve 222, a second guide ring 223 and a watchband contact finger structure 224; wherein, the first plug-in cavity and the second plug-in cavity are respectively provided at the opposite ends of the conductive tube, and the first measurement circuit 6 is plugged into the first plug-in cavity; the first conductor 8 is plugged into the second plug-in cavity, and a guide sleeve is sleeved between the first end of the first conductor 8 and the inner wall of the conductive tube; the guide ring is sleeved on the first conductor 8 at a position away from the first end, and the watchband contact finger structure is slidably sleeved on the area of ​​the first conductor 8 between the second guide ring 223 and the guide sleeve, and the guide sleeve, the second guide ring 223 and the watchband contact finger structure cooperate to ensure reliable docking between the conductive tube and the first conductor 8. Wherein:

[0052] The first plug-in cavity and the second plug-in cavity can both be groove structures. The first measuring line 6 is fixed to the first plug-in cavity by bolts. A boss is provided at the first end of the first conductor 8, and the guide sleeve is sleeved between the boss and the inner wall of the conductive tube by bolts. An annular groove matching the second guide ring 223 is provided on the first conductor 8, and the setting of the guide ring can prevent friction between the conductive tube and the first conductor 8.

[0053] The watchband contact finger structure is slidably mounted on the first conductor 8 in the area between the guide ring and the guide sleeve. The setting of the watchband contact finger structure can reduce contact resistance, increase current carrying capacity, and can be plugged in and out multiple times, ensuring accurate docking between the conductive tube and the first conductor 8, and the conductive tube and the second conductor 9.

[0054] Furthermore, the strap contact finger structure is formed by stacking a plurality of strap contact fingers, and a spring 225 is provided between each of the strap contact fingers to limit the displacement of each strap contact finger on the first conductor 8. The strap contact finger located at the top layer contacts the bottom of the boss, and the strap contact finger located at the bottom layer contacts the portion of the first conductor 8 close to the first guide ring.

[0055] See also Figure 2 The working process of the pole-mounted combination electrical appliance in this embodiment is as follows: the external measurement circuit enters the box body 1 through one of the bushings 2, and is connected to the isolating switch static contact 44, and the two isolating switch static contacts 44 and the isolating switch moving contact 45 are contacted through the isolating switch conductive rod 43, and the isolating switch moving contact 45 is connected to the static end of the vacuum interrupter 53, and the external measurement circuit is led out of the box body 1 through the vacuum interrupter 53 and the right bushing. When the entire electrical appliance needs to be disconnected, the vacuum interrupter 53 is first driven to disconnect through the circuit breaker insulating rod 52, so that the arc is extinguished in the vacuum interrupter 53 and the circuit is disconnected; then the isolating switch insulating rod 42 drives the isolating switch conductive rod 43 to disconnect, so that the isolating switch 4 static contact is electrically separated from the isolating switch moving contact 45. When the entire electrical appliance needs to be closed, the isolating switch operating shaft 41 first drives the isolating switch conductive rod 43 to close through the isolating switch insulating rod 42, thereby connecting the isolating switch static contact 44 and the isolating switch moving contact 45; then the circuit breaker operating shaft 51 drives the vacuum interrupter 53 to close through the circuit breaker insulating rod 52, thereby connecting the circuit.

[0056] It can be obviously concluded from the above that the pole-mounted combination electrical appliance provided in the present embodiment has a compact structure by integrating the isolating switch and the circuit breaker into the insulating body of the overall frame structure, and reduces the number of wiring terminals, so that the wiring of the entire electrical appliance becomes relatively simple. In particular, the conductive rod of the disconnector is exposed in the space outside the insulating body, so that the disconnector break is an obvious disconnection point to ensure reliable insulation; and the insulation level between the disconnector breaks will not decrease due to changes in the state of the internal insulating gas, contamination on the surface of the insulating body, and metal debris generated by the operation of the isolating switch deposited on the surface of the insulating body. Furthermore, by arranging a guide mechanism in the two sets of bushings, the current carrying capacity is increased while ensuring accurate measurement of the connection between the circuit and the internal conductor.

[0057] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A pole mounted combined electrical appliance, characterized in that: include: Box; Two sets of sleeves, part of the structures of the two sets of sleeves are respectively inserted on both sides of the box body, and one set of the sleeves A first measuring line is passed through the sleeve, and a second measuring line is passed through another set of the sleeves. A guiding mechanism is provided in both sets of the sleeves to guide the connection between the first measuring line and the first conductor, and the connection between the second measuring line and the second conductor. an insulating body, which is placed in the box body and divides the interior of the box body into a first chamber, a second chamber, a third chamber and a fourth chamber, wherein a first conductor is arranged in the first chamber and the first conductor is connected to the first measurement circuit; a second conductor is arranged in the second chamber and the second conductor is connected to the second measurement circuit; The isolating switch is placed in the box, and the static contact of the isolating switch is located in the first chamber and connected to the The first conductor contacts the isolating switch moving contact, the isolating switch moving contact is located in the fourth chamber, and the isolating switch conductive rod is exposed at The area between the first chamber and the fourth chamber; the isolating switch includes: an isolating switch operation Moving shaft, isolating switch insulating pull rod, isolating switch conductive rod, isolating switch static contact and isolating switch moving contact; wherein, One end of the isolating switch insulating pull rod is connected to the isolating switch operating shaft, and the other end is connected to the isolating switch The isolating switch operating shaft drives the isolating switch insulating pull rod to operate the isolating switch. The conductive rod moves between the static contact of the isolating switch and the movable contact of the isolating switch to realize the static contact of the isolating switch. The conduction and disconnection of the contact and the movable contact of the isolating switch; A circuit breaker is placed in the third chamber and connected to the second measuring line through the second conductor, and is used for switching on and off normal current of the line or cutting off fault current.

2. The column mounted combined electrical appliance according to claim 1, characterized in that: A guide block is embedded in one end of the isolating switch conductive rod close to the isolating switch static contact, and a plurality of first guide rings are arranged on one end of the isolating switch conductive rod close to the isolating switch moving contact, and each of the first guide rings is distributed on both sides of the isolating switch moving contact. The guide block cooperates with the first guide ring to center the static contact of the isolating switch and the moving contact of the isolating switch Inserted on the conductive rod of the isolating switch.

3. The column mounted combined electrical appliance according to claim 2, characterized in that: The guide block is provided with a plurality of passages in the circumference thereof. The air holes are provided to prevent the insulating gas in the box from being blocked.

4. The column mounted combined electrical appliance according to claim 1, characterized in that: The circuit breaker comprises: a circuit breaker operating shaft, Circuit breaker insulation rod and vacuum interrupter; among them, One end of the circuit breaker insulating pull rod is connected to the moving end of the vacuum interrupter, and the circuit breaker insulating pull rod has a The spring at the bottom is arranged close to the vacuum interrupter; the other end of the circuit breaker insulating pull rod is connected to the circuit breaker operating shaft The circuit breaker insulating pull rod is used to transfer the closing and opening energy of the circuit breaker operating shaft to the vacuum arc extinguishing chamber to control the closing and opening operation of the circuit breaker; the moving end of the vacuum interrupter is connected to the second measuring circuit, The first measuring line that is connected through the static contact of the isolating switch and the movable contact of the isolating switch is extinguished by the vacuum The chamber leads out of the box.

5. The pole mounted combined electrical appliance according to claim 1, characterized in that: The guide mechanism comprises: a conductive tube, a guide sleeve, a second guide ring and a watchband contact finger structure; wherein, The conductive tube is provided with a first plug-in cavity and a second plug-in cavity at opposite ends thereof, the first measuring circuit is plugged into the first plug-in cavity; the first conductor is plugged into the second plug-in cavity, and a guide sleeve is sleeved between the first end of the first conductor and the inner wall of the conductive tube; The second guide ring is disposed on the first conductor at a position away from the first end. The area between the second guide ring and the guide sleeve is slidably provided with the watchband contact structure. The second guide ring cooperates with the strap contact finger structure to ensure reliable alignment of the conductive tube with the first conductor. catch.

6. The pole mounted combined electrical appliance according to claim 5, characterized in that: The strap contact finger structure is composed of a plurality of strap contacts The fingers are stacked and arranged in layers, and a spring is arranged between each of the strap contact fingers to limit each of the strap contact fingers in the Displacement on the first conductor.

7. The pole mounted combined electrical appliance according to claim 1, characterized in that: The two sets of sleeves are located outside the box. Lightning arresters and voltage transformers are arranged in parallel on both sides.

8. The pole mounted combined electrical appliance according to claim 1, characterized in that: The inner wall of the box is provided with a flame retardant structure.

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