CN222422772U

CN222422772U - Bypass components and bypass cabinets

Info

Publication number: CN222422772U
Application number: CN202323548829.9U
Authority: CN
Inventors: 王金雪
Original assignee: Beijing Hekang Xinneng Frequency Conversion Technology Co ltd
Current assignee: Beijing Hekang Xinneng Frequency Conversion Technology Co ltd
Priority date: 2023-12-25
Filing date: 2023-12-25
Publication date: 2025-01-28
Anticipated expiration: 2033-12-25

Abstract

The utility model discloses a bypass assembly and a bypass cabinet, wherein the bypass cabinet comprises a first contactor, a second contactor, a third contactor, a first isolating switch and a second isolating switch, wherein the first contactor and the first isolating switch are transversely arranged side by side, the second contactor and the third contactor are transversely arranged side by side and are arranged at the lower sides of the first contactor and the first isolating switch, and the second isolating switch is arranged at one side, away from the first contactor and the first isolating switch, of the second contactor and the third contactor. According to the arrangement structure, two adjacent contactors or isolating switches are connected through the plurality of conductive connecting parts, so that the motor power supply requirement under two working conditions is met, two adjacent switching elements are connected to the two ends of each conductive connecting part respectively, the plurality of switching elements are not required to be crossed for connection, the length of the conductive connecting parts used integrally is short, and the problems that the existing bypass cabinet is unreasonable in layout and the wiring is messy and wastefully connected with copper bars are solved.

Description

Bypass assembly and bypass cabinet

Technical Field

The utility model relates to the field of electrical equipment, in particular to a bypass assembly and a bypass cabinet.

Background

With the continuous development of frequency conversion technology, the long-term standby reliability of the frequency converter is greatly improved. But the motor needs to work continuously for some special industries. How to avoid the accident caused by the frequency converter fault, improve the running reliability of the uninterrupted working motor, become the most important consideration factors in the coal mine and chemical industry, and therefore, besides selecting the frequency converter product with high reliability, the bypass cabinet is required to be configured. Compared with a manual bypass cabinet, the automatic bypass cabinet can carry out fault maintenance and normal maintenance on the frequency converter under the condition that the motor is not stopped.

Disclosure of utility model

The utility model mainly aims to provide a bypass assembly and a bypass cabinet, and aims to solve the problems that the existing bypass cabinet is unreasonable in layout, and the wiring is messy and waste in connection with copper bars.

In order to achieve the above object, the present utility model provides a bypass assembly, which includes a plurality of contactors, a plurality of isolating switches and a plurality of conductive connection parts;

The plurality of contactors comprise a first contactor, a second contactor and a third contactor, and the plurality of isolating switches comprise a first isolating switch and a second isolating switch;

The first contactor and the first isolating switch are arranged side by side in the transverse direction, the second contactor and the third contactor are arranged side by side in the transverse direction and are arranged on the lower sides of the first contactor and the first isolating switch, and the second isolating switch is arranged on one side, away from the first contactor and the first isolating switch, of the second contactor and the third contactor;

The output end of the first contactor is used for being connected with the input end of the frequency converter, the input end of the first contactor is connected with the output end of the first isolating switch through a conductive connecting part, the input end of the first isolating switch is used for being connected with a power supply through a conductive connecting part and is connected with the input end of the third contactor through another conductive connecting part, the output end of the third contactor is connected with the output end of the second contactor through a conductive connecting part and is used for being connected with a motor, the input end of the second contactor is connected with the output end of the second isolating switch, and the input end of the second isolating switch is used for being connected with the output end of the frequency converter.

Optionally, the input end of the first contactor is located at the upper side of the main body of the first contactor, and the output end of the first isolating switch is located at the upper side of the main body of the first isolating switch;

The input end of the first isolating switch is positioned at one side of the main body of the first isolating switch in the transverse direction and is arranged away from the first contactor, and the input end of the third contactor is positioned at one side of the main body of the third contactor in the transverse direction and is arranged away from the second contactor;

The output end of the third contactor is positioned on the upper side of the main body of the third contactor, and the output end of the second contactor is positioned on the upper side of the main body of the second contactor.

Optionally, the input end of the second contactor is located at one side of the main body of the second contactor in the transverse direction and is arranged away from the third contactor, and the output end of the second disconnecting switch is located at one side of the main body of the second disconnecting switch in the transverse direction;

The bypass assembly further includes a flexible cable connecting the input of the second contactor with the output of the second isolation switch.

Optionally, the second contactor and the third contactor both have a closing state and a separating state;

the bypass assembly further includes a mechanical interlock for causing one of the second contactor and the third contactor to switch to the open state when the other of the second contactor and the third contactor is in the closed state.

The utility model also provides a bypass cabinet comprising:

a cabinet body formed with an installation cavity;

A bypass assembly provided in the mounting cavity, and

The first contactor, the second contactor, the third contactor, the first isolating switch and the second isolating switch are respectively arranged on the plurality of mounting beams;

The bypass assembly comprises a plurality of contactors, a plurality of isolating switches and a plurality of conductive connecting parts;

Optionally, an opening is arranged on one side of the mounting cavity, which is in the transverse direction and is close to the first isolating switch;

The first disconnecting switch has a first blade rotatably mounted to an input end of the first disconnecting switch, the first blade being configured such that a free end of the first blade is movable toward or away from the opening during a rotational travel thereof to turn the first disconnecting switch on or off.

Optionally, the second isolating switch has a second blade rotatably mounted to an input of the second isolating switch, the second blade being operable to turn on and off the second isolating switch output during a rotational stroke thereof, a free end of the second blade being movable towards and away from a bottom wall of the mounting cavity during a rotational stroke thereof.

Optionally, the bypass cabinet further comprises an insulating plate arranged on the bottom wall of the mounting cavity.

Optionally, the plurality of conductive connection parts further include an outgoing metal conductive strip and a first connection metal conductive strip, the outgoing metal conductive strip is located between the first contactor and the second contactor, the outgoing metal conductive strip is provided with two groups of connection terminals, one group of connection terminals is used for being connected with a power supply, and the other group of connection terminals is connected with the input end of the first isolating switch through the first connection metal conductive strip.

Optionally, the outgoing metal conducting bar, the first contactor and the first isolating switch are sequentially and fixedly connected to the first cross beam at intervals in the transverse direction;

the plurality of mounting beams comprise first cross beams extending transversely, the first connecting metal conducting bars comprise connecting sections extending transversely and two mounting sections which are respectively arranged at two ends of the connecting sections and extend vertically, one mounting section is connected with the outgoing metal conducting bars, the other mounting section is connected with the first isolating switch, and the connecting sections are arranged below the first cross beams;

the bypass cabinet further comprises an insulator arranged between the outgoing metal conducting bar and the first isolating switch, the upper end of the insulator is fixedly connected with the first cross beam, and the lower end of the insulator is fixedly connected with the middle of the first connecting metal conducting bar.

In the technical scheme provided by the utility model, a power supply supplies power to a motor, two circuits which are arranged in parallel are arranged on a circuit connected with the power supply and the motor, when the motor is in a normal working state and the frequency conversion electricity needs to be supplied through a frequency converter, a first isolating switch, a first contactor, a second isolating switch and a second contactor which are arranged on the circuit for connecting the power supply and the frequency converter and connecting the frequency converter and the motor can be closed and connected, a third contactor is disconnected, when the frequency converter breaks down or needs to be maintained, at least one of the first isolating switch, the first contactor, the second isolating switch and the second contactor is switched to an open state, the third contactor arranged on the circuit of the power supply and the motor is closed and connected, so that the fault maintenance and normal maintenance are carried out on the frequency converter under the condition that the motor is not stopped, the first contactor and the first isolating switch are arranged side by side, the second contactor and the third contactor are arranged side by side in parallel in the transverse direction, the first contactor and the first contactor are arranged on one side of the first isolating switch, the first contactor and the second contactor and the first contactor are not required to be connected, the two adjacent to the first contactor and the second contactor are connected to the second contactor, the two adjacent conducting elements are not required to be connected, the two adjacent conducting elements are connected, the two conducting elements are connected at one side of the two sides of the first contactor and the two conducting elements are connected, the two conducting elements are connected according to the current conducting elements are reasonably, the current conducting elements are connected to the two conducting elements are connected at the two adjacent to the first isolating switches are connected, the wiring is messy and wasteful, and the copper bar is connected.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic front view of an embodiment of a related art bypass cabinet;

FIG. 2 is a schematic circuit diagram of the bypass assembly of FIG. 1;

FIG. 3 is a schematic view of an internal structure of an embodiment of a bypass cabinet according to the present utility model;

Fig. 4 is a schematic circuit diagram of the bypass assembly of fig. 3.

Reference numerals illustrate:

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear are referred to in the embodiments of the present utility model), the directional indications are merely used to explain the relative positional relationship, movement conditions, and the like between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

Referring to fig. 1 and 2 in the drawings, fig. 1 is a schematic front view of an embodiment of a related art bypass cabinet, fig. 2 is a schematic circuit diagram of a bypass assembly in fig. 1, and the conventional automatic bypass cabinet has the defects of messy wiring, copper bar waste and limited wire inlet and outlet due to unreasonable layout of electric devices.

Specifically, in the circuit layout shown in fig. 2, the first contactor, the first isolating switch, the second contactor and the second isolating switch are all arranged along the up-down direction, the third contactor is arranged on one side of the first contactor, the first isolating switch, the second contactor and the second isolating switch in the transverse direction, and then the length of the copper bar required when the input end of the third contactor is connected with the power supply and the output end of the third contactor is connected with the motor needs to span the distance of the lengths and the widths of the switch elements, and the length of the copper bar is longer.

In order to solve the above-mentioned problems, the present utility model provides a bypass assembly, fig. 3 is a schematic diagram of an internal structure of an embodiment of a bypass cabinet provided by the present utility model, and fig. 4 is a schematic circuit diagram of the bypass assembly in fig. 3.

Referring to fig. 3 to 4, the bypass assembly includes a plurality of contactors, a plurality of isolating switches and a plurality of conductive connecting parts 40; the plurality of contactors comprise a first contactor KM1, a second contactor KM2 and a third contactor KM3, the plurality of isolating switches comprise a first isolating switch KM1 and a second isolating switch QS2, the first contactor KM1 and the first isolating switch QS1 are transversely arranged side by side, the second contactor KM2 and the third contactor KM3 are transversely arranged side by side and are arranged at the lower sides of the first contactor KM1 and the first isolating switch QS1, the second isolating switch QS2 is arranged at one side of the second contactor KM2 and the third contactor KM3, which is far away from the first contactor KM1 and the first isolating switch QS1, the output end of the first contactor KM1 is connected with the input end of a frequency converter, the input end of the first contactor KM1 is connected with the output end of the first isolating switch QS1 through a conductive connecting part 40, the first isolating switch QS1 is connected with the output end of the second contactor KM2 through a conductive connecting part 40, and the input end of the first contactor QS1 is connected with the output end of the second contactor QS2 through a conductive part 40, and the output end of the second contactor QS2 is connected with the output end of the input end of the second contactor QS2 through a conductive part.

It can be appreciated that when the motor is operated in variable frequency, the first disconnecting switch QS1 and the second disconnecting switch QS2 are switched on, the first contactor KM1 and the second contactor KM2 are switched on, and the third contactor KM3 is switched off.

When the frequency converter fails, the second contactor KM2 is automatically switched off, and the third contactor KM3 is automatically switched on, so that the frequency conversion of the motor is switched to the power frequency.

When the frequency converter is overhauled, the third contactor KM3 is switched on, the second contactor KM2 is switched off, the first contactor KM1 is switched off, the first isolating switch QS1 and the second isolating switch QS2 are switched off.

The power supply refers to power frequency electricity, and general power frequency electricity refers to standard alternating current power supplies used in industrial and household electricity, and the frequency of the standard alternating current power supplies is usually 50 hertz (Hz) or 60 hertz (Hz), that is, when a motor is directly connected with the power frequency electricity, the motor works according to fixed rotating speed and output power. Since the inverter is a device for controlling the rotational speed and output power of the motor, the operating speed of the motor is adjusted by changing the frequency and voltage of the power supply. The frequency converter can realize the functions of speed regulation, starting, stopping, protection and the like of the motor, and improves the running efficiency of the motor and the control performance of the system, so that the frequency conversion power supply is required to be provided by the frequency converter under the actual normal working state of the motor, the running speed of the motor is accurately regulated to a required range, and the output power of the motor is regulated in real time according to the load change, so that the energy efficiency of the system is improved. Because the frequency converter works for a long time, when overhauling and maintenance are needed, the motor needs to work continuously, and then the motor can be directly and electrically connected with the power frequency.

It will be appreciated that in a frequency conversion circuit, the input of the frequency converter is typically connected to a power source, the connection and disconnection of which is controlled by contactors. The contactor may turn on or off the input of the power supply by a control signal, such as a button, a switch, or an automatic control device, etc. Thus, the power supply state of the power supply can be conveniently controlled, and the operation of the frequency converter can be started and stopped. The output of the frequency converter is typically connected to a motor or other load device. The contactor is used for connecting the output of the frequency converter with load equipment, and the contactor can realize the starting, stopping and protecting functions of the motor. When the contactor is closed, the power can be transmitted to the motor to enable the motor to normally operate. When the contactor is opened, the power supply is disconnected from the motor, and stopping of the motor is achieved.

It will be appreciated that the isolating switch is provided before the input contactor of the frequency converter, and is used to cut off the electrical connection between the power supply and the frequency converter, and to isolate the power supply from the frequency converter thoroughly, so as to ensure safe operation in maintenance, overhaul or emergency situations. When the frequency converter needs to be overhauled, maintained or replaced, the isolating switch can be closed to cut off the power supply of the power supply to the frequency converter, so that the danger of the power supply voltage to staff is avoided. And when the frequency converter is in fault or abnormal in power supply, the power supply can be cut off rapidly by closing the isolating switch so as to protect the frequency converter and other equipment from potential electrical faults.

It should be noted that, in the solution of the present application, the contactor may provide overload protection, and when the motor or the load device is overloaded, the contactor may automatically open the circuit, so as to avoid damage or failure of the device. Although the contactor is arranged to add a layer of safety protection in the control loop of the frequency converter, the frequency converter can be conveniently started and stopped by arranging the isolating switch. Compared with the direct operation of a contactor or the disconnection of a power supply, the isolating switch can cut off or restore the power supply more conveniently, and meanwhile, the influence on other equipment or systems caused by misoperation can be avoided.

In the technical scheme provided by the utility model, a power supply supplies power to a motor, two circuits which are arranged in parallel are arranged on a circuit connected with the motor by the power supply, when the motor is in a normal working state, variable frequency power is required to be supplied through a frequency converter, a first isolating switch QS1, a first contactor KM1, a second isolating switch QS2 and a second contactor KM2 which are arranged on the circuit connected with the power supply and the frequency converter and the motor can be closed and connected, and a third contactor KM3 is disconnected; when the frequency converter fails or needs to be maintained, at least one of the first disconnecting switch QS1, the first contactor KM1, the second disconnecting switch QS2 and the second contactor KM2 can be switched to an off state, the third contactor KM3 arranged on the power supply and the motor circuit is closed and connected, so that the frequency converter is maintained in a fault and normal state under the condition that the motor is not stopped, the first contactor KM1 and the first disconnecting switch QS1 are arranged side by side transversely, the second contactor KM2 and the third contactor KM3 are arranged side by side transversely, the first contactor KM1 and the first disconnecting switch QS1 are arranged on one side of the upper side and the lower side, the second disconnecting switch QS2 is arranged on one side of the second contactor KM2 and the third contactor KM3, which is away from the first contactor KM1 and the first disconnecting switch QS1, the two adjacent conducting parts 40 are connected in a short distance through a plurality of conducting parts or two conducting elements 40 are connected in a short distance respectively, the two adjacent conducting parts can be connected in a short distance respectively, the problem of current bypass cabinet 100 overall arrangement is unreasonable, goes up the messy connection copper bar of wastage is solved.

It should be understood that the wire connection portion 40 is generally configured as a metal conductive device, such as a copper bar, or a conductive connection bar made of copper-nickel alloy, copper-aluminum alloy, etc., and may be specifically designed according to the practical situation, which is not limited in the embodiment of the present disclosure.

Specifically, in this embodiment, the input end of the first contactor KM1 is located on the upper side of the main body of the first contactor KM1, and the output end of the first disconnecting switch QS1 is located on the upper side of the main body of the first disconnecting switch QS1, so that only the length of the conductive connection portion 40 connecting the first disconnecting switch QS1 and the first contactor KM1 needs to be set to be the linear distance between the input end of the first contactor KM1 and the output end of the first disconnecting switch QS1 in the lateral direction.

Specifically, in this embodiment, the input end of the first disconnecting switch QS1 is located at a side of the main body of the first disconnecting switch QS1 in the lateral direction and is disposed away from the first contactor KM1 in the lateral direction, and the input end of the third contactor KM3 is located at a side of the main body of the third contactor KM3 in the lateral direction and is disposed away from the second contactor KM2 in the lateral direction. In this way, the length of the conductive connection portion 40 connecting the first disconnecting switch QS1 and the third contactor KM3 is only required to be set to be substantially the linear distance between the input end of the third contactor KM3 and the input end of the first disconnecting switch QS1 in the up-down direction.

Specifically, in the present embodiment, the output end of the third contactor KM3 is located on the upper side of the body of the third contactor KM3, and the output end of the second contactor KM2 is located on the upper side of the body of the second contactor KM 2. In this way, the length of the conductive connection portion 40 connecting the second contactor KM2 and the third contactor KM3 is set to be substantially the linear distance between the output end of the third contactor KM3 and the output end of the second contactor KM2 in the lateral direction.

In this way, the length of each of the conductive connection parts 40 can be made to the shortest size, so that the overall length of the plurality of conductive connection parts 40 can be made to the shortest length, thereby further reducing the cost.

Specifically, in the actual bypass cabinet 100, the space where the input end of the second contactor KM2 is connected to the output end of the second disconnecting switch QS2 is relatively complex, and other electrical components exist, so that the conductive connection portion 40 is inconvenient to be arranged, and in order to connect the input end of the second contactor KM2 with the output end of the second disconnecting switch QS2, in this embodiment, the input end of the second contactor KM2 is located at a lateral side of the main body of the second contactor KM2 and is set away from the third contactor KM3, and the output end of the second disconnecting switch QS2 is located at a lateral side of the main body of the second disconnecting switch QS 2. So set up, with the input of second contactor KM2 with the output of second isolator QS2 locates same one side, no matter what kind of connection switches on the part, can all set up the distance short. In this embodiment, the bypass assembly further includes a flexible cable 1, and the flexible cable 1 connects the input end of the second contactor KM2 and the output end of the second disconnecting switch QS 2. In this way, by providing the flexible cable 1, bending and arrangement can be performed as required, adapting to different installation environments and space constraints. Compared with the connection through copper bars, the copper bar is rigid and not flexible, so that the copper bar has better performance in terms of flexibility, expandability, maintenance and disassembly.

In this embodiment, the second contactor KM2 and the third contactor KM3 each have a closing state and a breaking state, when the contactors are in the closing state, the circuit paths between the contacts are connected, and current can flow through the contactors to make the circuit in the closing state, and when the contactors are broken, the circuit is broken.

Further, the bypass assembly further includes a mechanical interlock 2, where when one of the second contactor KM2 and the third contactor KM3 is in the closed state, the mechanical interlock 2 causes the other of the second contactor KM2 and the third contactor KM3 to switch to the open state, so that the second contactor KM2 and the third contactor KM3 can be prevented from switching to the closed state at the same time. It will be appreciated that the mechanical interlock 2 is typically physically or mechanically implemented, such as by means of a cam, pin, push rod, etc., for connection and operation. The mechanical interlocking 2 has the function of enabling the second contactor KM2 and the third contactor KM3 to have an interlocking relationship through designing and installing a mechanical connecting device, namely, when one of the two contactors is switched on, the other contactor is in a switching-off state and cannot be switched on simultaneously, so that the phenomenon that current is greatly increased in a short time when the second contactor KM2 and the third contactor KM3 are switched on simultaneously, short circuit faults are caused, overload faults of equipment are caused due to exceeding rated load capacity of the equipment, misoperation can be caused, and the circuit is started under improper time or condition is avoided.

The present utility model further provides a bypass cabinet 100, where the bypass cabinet 100 includes the bypass assembly, and because the bypass cabinet 100 includes the bypass assembly, the bypass assembly refers to the foregoing embodiments, and because the bypass assembly of the bypass cabinet 100 adopts all the technical solutions of all the foregoing embodiments, at least has all the beneficial effects brought by the technical solutions of the foregoing embodiments, which are not described herein in detail.

In this embodiment, the bypass cabinet 100 further includes a cabinet body 10 and a plurality of mounting beams 20, where the cabinet body 10 is formed with a mounting cavity, the plurality of mounting beams 20 are fixedly connected with an inner wall of the mounting cavity, and the first contactor KM1, the second contactor KM2, the third contactor KM3, the first isolating switch QS1 and the second isolating switch QS2 are separately disposed on the plurality of mounting beams 20.

Specifically, the plurality of mounting beams 20 includes an upper cross beam, an upper vertical beam, and a lower cross beam. The first contactor KM1 is fixed on the upper beam through a single contactor mounting plate, the first isolating switch QS1 is mounted at the front end of the first contactor KM1, that is, the first isolating switch QS1 is mounted at one side close to the opening of the bypass cabinet 100, the plurality of mounting beams 20 further include a first isolating mounting beam, and a second isolating mounting beam disposed at the lower side of the first isolating mounting beam, and the first isolating switch QS1 is fixed on the upper vertical beam through the first isolating mounting beam. The second contactor KM2 and the third contactor KM3 are fixed on a double-contactor mounting plate, and the mechanical linkage is arranged between the second contactor KM2 and the third contactor KM 3. The second isolating switch QS2 is fixed on the lower cross beam through the second isolating mounting beam and is positioned right below the double-contactor mounting plate. An insulator is fixed below the single-contactor mounting plate, the first isolating switch QS1 is fixed to the incoming copper bar of the high-voltage sensor, the high-voltage sensor is fixed to the rear upper end of the frame through a sensor mounting beam, and therefore all the switch elements are fixedly mounted through a corresponding mounting beam 20, and the inner space is reasonably distributed.

In the present utility model, the foregoing lateral direction corresponds to the bypass cabinet 100, and may refer to a front end and a rear end of the bypass cabinet 100, the first contactor KM1, the second contactor KM2, the third contactor KM3, the first disconnecting switch QS1, and the second disconnecting switch QS2 are described with respect to the bypass cabinet 100, the first disconnecting switch QS1 is disposed at the front end of the bypass cabinet 100 and is disposed near the opening, the first contactor KM1 is disposed at the rear end of the first disconnecting switch QS1, and the second contactor KM2 is disposed at the rear end of the third contactor KM 3.

Further, in this embodiment, an opening is disposed on a side of the mounting cavity, which is located in a lateral direction and is close to the first disconnecting switch QS1, the opening is configured as a door window, so as to facilitate mounting and post-maintenance of each electronic device mounted in the mounting cavity, a cabinet door is disposed at the opening for opening and closing the opening, the first disconnecting switch QS1 has a first blade 3 rotatably mounted at an input end of the first disconnecting switch QS1, the first blade 3 is used for switching on and off an output end of the first disconnecting switch QS1 in a rotation stroke thereof, and a free end of the first blade 3 is disposed close to and far from the opening in the rotation stroke thereof. In this way the operator can clearly see and access the first blade 3 before entering the electrical cabinet. Therefore, misoperation of operators can be avoided, a certain distance is kept between the first switch blade 3 and the operators, and electric shock risks are reduced. When in operation, the operator needs to open or close the cabinet door, and the position of the first switch blade 3 can remind the operator to keep a safe distance, so as to avoid contacting the electrified part. And the first switch blade 3 faces to the opening, so that the position and the state of the first switch blade 3 can be monitored conveniently by an operator. In the operation process, an operator can directly observe whether the position of the first switch blade 3 is correct or not so as to ensure the correct switching of a circuit and the safety of operation, and the operation and maintenance are convenient, and when the maintenance or overhaul is needed, the cabinet door is opened to directly contact with the first switch blade 3, so that the operation and maintenance work are convenient.

In this embodiment, the second disconnecting switch QS2 has a second blade 4 rotatably mounted at an input end of the second disconnecting switch QS2, the second blade 4 is used for turning on and off an output end of the second disconnecting switch QS2 in a rotation stroke thereof, a free end of the second blade 4 can be close to and far away from a bottom wall of the mounting cavity in the rotation stroke thereof, and the second blade 4 of the second disconnecting switch QS2 is directed towards a cabinet door of the electrical cabinet, so that safety of operators is improved, misoperation and electric shock risks are prevented, and operation monitoring and maintenance work are facilitated.

Since the isolating switch generally has a larger creepage distance, the creepage distance is the maximum distance between the two conductive parts that can be safely contacted when the voltage is continuously increased on the insulating surface, in order to reduce or prevent the occurrence of arcing and corona discharge phenomena and ensure the safe isolation of the circuit, in this embodiment, the bypass cabinet 100 further comprises an insulating plate 30 provided on the bottom wall of the installation cavity. As such, the second disconnecting switch QS2 may generate an arc when cutting off the circuit, and damage the surrounding insulating material and equipment. By providing the insulating plate 30 below the second disconnecting switch QS2, the arc can be prevented from propagating downwards, reducing the impact on the equipment below. And the insulating plate 30 may provide an additional insulating layer to increase the insulating distance of the bypass cabinet 100, which helps to prevent the bypass cabinet 100 from an insulation failure during operation and reduce the generation of arc and corona. Meanwhile, the insulating plate 30 can also prevent foreign matters and moisture from entering the inside of the electric device, thereby improving the insulating reliability of the device. The insulating plate 30 may act as a barrier separating the area under the disconnector from the equipment above. Thus, the device can be more conveniently operated during maintenance and cleaning of the device, and the electric shock risk of operators is reduced. At the same time, dirt on the insulating plate 30 can be cleaned more easily, maintaining a good running state of the apparatus.

Meanwhile, in the related art, the second isolating switch is disposed at the rear end portion of the bypass cabinet, so that in order to enable the second isolating switch to have a larger creepage distance, the space required to be set by the bypass cabinet is larger, and in this embodiment, the second isolating switch QS2 is hoisted, so that the whole cabinet height of the bypass cabinet 100 can be controlled below 2 meters, and the volume and the height of the bypass cabinet 100 are effectively reduced.

In this embodiment, the plurality of conductive connection portions 40 further include an outgoing metal conductive strip 41 and a first connection metal conductive strip 401, the outgoing metal conductive strip 41 is located between the first contactor KM1 and the second contactor KM2, and the outgoing metal conductive strip 41 is provided with two groups of connection terminals 411, where one group of connection terminals 411 is used for connection with a power supply, and the other group of connection terminals 411 is connected with an input end of the first isolating switch QS1 through the first connection metal conductive strip 401. The outgoing metal conductor bars 41 are provided with two sets of the connection terminals 411, and it is understood that the connection terminals 411 may be provided as fixing holes. Some motor types (e.g., dc motors) operate at forward current, while other motor types (e.g., ac motors) operate at bi-directional current. Thus, different types of motors may need to select a particular current transfer direction depending on their manner of operation. By this arrangement, the cabinet body 10 of the bypass cabinet 100 can realize both the power supply upper outgoing line and the power supply lower outgoing line. The power supply upper outlet means that the output current of the power supply is output from the upper side or the top of the power supply. This means that current is transferred from the positive or output of the power supply to the load or device via the electrical line, and that the power supply down-line means that the output current of the power supply is coming out from the lower or bottom of the power supply. This means that current is transferred from the negative or output of the power supply to the load or device via the electrical line.

In this embodiment, the outgoing metal conductive strip 41, the first contactor KM1 and the first isolating switch QS1 are sequentially and fixedly connected to the first cross beam 21 at intervals in a transverse direction, the plurality of mounting beams 20 include a first cross beam 21 extending in a transverse direction, the first connecting metal conductive strip 401 includes a connecting section extending in a transverse direction and two mounting sections respectively disposed at two ends of the connecting section and extending in an up-down direction, one of the mounting sections is connected with the outgoing metal conductive strip 41, the other mounting section is connected with the first isolating switch QS1, and the connecting section is disposed below the first cross beam 21. The bypass cabinet 100 further includes an insulator 50 disposed between the outgoing metal conductive strip 41 and the first isolating switch QS1, an upper end of the insulator 50 is fixedly connected to the first cross beam 21, and a lower end of the insulator 50 is fixedly connected to a middle portion of the first connection metal conductive strip 401. Because the first contactor KM1 is spaced between the first disconnecting switch QS1 and the outgoing metal strip 41, when the outgoing metal strip 41 connecting a group of the connection terminals 411 and the input end of the first disconnecting switch QS1 is provided with an excessively long size, the insulator 50 can fix the middle portion of the outgoing metal strip 41 on the first beam 21.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims

1. A bypass assembly comprising a plurality of contactors, a plurality of disconnectors and a plurality of electrically conductive connections;

2. The bypass assembly of claim 1, wherein the input of the first contactor is located on an upper side of the body of the first contactor and the output of the first isolation switch is located on an upper side of the body of the first isolation switch;

3. The bypass assembly of claim 1, wherein the input of the second contactor is located laterally to the main body of the second contactor and is disposed away from the third contactor, and the output of the second disconnector is located laterally to the main body of the second disconnector;

4. The bypass assembly of claim 1, wherein the second contactor and the third contactor each have a closed state and an open state;

5. A bypass bin, comprising:

a cabinet body formed with an installation cavity;

A bypass assembly as claimed in any one of claims 1 to 4, provided in the mounting chamber, and

The first contactor, the second contactor, the third contactor, the first isolating switch and the second isolating switch are respectively arranged on the plurality of mounting beams.

6. The bypass cabinet of claim 5, wherein the mounting cavity is laterally open on a side adjacent to the first isolation switch;

7. The bypass bin of claim 5, wherein the second isolation switch has a second blade rotatably mounted to an input of the second isolation switch, the second blade being operable to turn on and off an output of the second isolation switch during a rotational travel thereof, a free end of the second blade being movable toward and away from a bottom wall of the mounting cavity during a rotational travel thereof.

8. The bypass bin of claim 7, further comprising an insulating plate provided on a bottom wall of the mounting cavity.

9. The bypass cabinet of claim 5, wherein the plurality of conductive connections further comprises an outgoing metal conductor bar and a first connection metal conductor bar, the outgoing metal conductor bar being located between the first contactor and the second contactor, the outgoing metal conductor bar being provided with two sets of connection terminals, one set of connection terminals being for connection to a power source, the other set of connection terminals being connected to an input of the first disconnector via the first connection metal conductor bar.

10. The bypass cabinet of claim 9, wherein the plurality of mounting beams includes a first cross beam extending in a lateral direction, the outgoing metal conductor bar, the first contactor, and the first isolation switch being fixedly connected to the first cross beam at successive intervals in the lateral direction;

The first connecting metal conductive bar comprises a connecting section extending transversely and two mounting sections which are respectively arranged at two end parts of the connecting section and extend vertically, one mounting section is connected with the outgoing metal conductive bar, the other mounting section is connected with the first isolating switch, and the connecting section is arranged below the first cross beam;