A control circuit for a power distribution cabinet and a power distribution cabinet

Abstract

This utility model relates to a power distribution cabinet control circuit and a power distribution cabinet. The power distribution cabinet control circuit includes a power supply module, a controller module, a communication module, and an electric operating mechanism module. In this utility model, the controller module establishes a connection with the cloud through the communication module. The cloud sends opening and closing signals to the controller module, which controls the operation of intermediate relays to complete the opening and closing operations, thereby realizing remote control of the power distribution cabinet. The power distribution cabinet includes a power distribution cabinet body, partitions, and the power distribution cabinet control circuit. The power distribution cabinet of this utility model adopts a partition structure, dividing the power distribution cabinet body into two receiving platforms, and rearranging the electrical components. The digital remote control components are installed on the partitions, and the components in the high-voltage area are installed on the bottom plate of the power distribution cabinet body. By modularizing the layout of the power distribution cabinet, the layout structure is optimized, the circuit wiring is optimized, and the fault detection efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of power distribution cabinets, and in particular to a power distribution cabinet control circuit and a power distribution cabinet. Background Technology

[0002] As the core equipment for power distribution and protection in a power system, the safe and reliable operation of the distribution cabinet plays a decisive role in the stability of the power supply and distribution system. In the existing technology, the opening and closing operations of the distribution cabinet mainly rely on manual on-site execution or automated control based on fixed programs. It is impossible to remotely control the distribution cabinet to perform opening and closing operations by acquiring distribution current and voltage data in real time at the control terminal, making it difficult to respond to faults in a timely manner. Utility Model Content

[0003] Based on this, the purpose of this utility model is to provide a power distribution cabinet control circuit and a power distribution cabinet, which establishes a communication connection with the cloud through a controller module and a communication module to realize remote control of the opening and closing of the power distribution cabinet.

[0004] In a first aspect, this utility model provides a power distribution cabinet control circuit, including: a power supply module, a controller module, a communication module, and an electric operating mechanism module; the power supply module supplies power to the controller module and the communication module respectively;

[0005] The input terminal of the controller module is connected to the output terminal of the communication module, and the controller module is used to receive control signals of the electric operating mechanism sent from the cloud through the communication module;

[0006] The electric operating mechanism module includes a first intermediate relay, a second intermediate relay, and an electric operating mechanism; the output terminal of the controller module is connected to the power supply terminals of the first intermediate relay and the second intermediate relay respectively; the first normally closed terminal of the first intermediate relay is connected to the first normally open terminal of the second intermediate relay, and the first normally closed terminal of the second intermediate relay is connected to the normally open terminal of the first intermediate relay; the first common terminal of the first intermediate relay and the second intermediate relay is connected to the closing input port and the opening input port of the electric operating mechanism respectively.

[0007] In some possible implementations, the circuit further includes a selector switch and a button module;

[0008] The first and third terminals of the changeover switch are respectively connected to the electrical equipment, the second terminal of the changeover switch is connected to the button module, the fourth terminal of the changeover switch is respectively connected to the first intermediate relay and the second intermediate relay, and the seventh and eighth terminals of the changeover switch are connected to the controller module; the button module is connected to the closing input port and the opening input port of the electric operating mechanism.

[0009] In some possible implementations, the circuit further includes a monitoring device; the neutral input port of the monitoring device is connected to the output port of the electric operating mechanism module, and the monitoring device is connected to the electrical equipment via a three-phase circuit; the output of the monitoring device is connected to the communication module; the monitoring device is used to send the current and voltage data of the electrical equipment to the cloud via the communication module.

[0010] In some possible implementations, the circuit further includes a surge protector module connected to the three-phase circuit, and the monitoring device is connected to the electrical equipment through the surge protector module.

[0011] In some possible implementations, the circuit further includes a current transformer group; the current transformer group includes a plurality of current transformers, the first terminal of the current transformer is connected to the positive secondary terminal of the current transformer of the monitoring equipment, the second terminal of the current transformer is grounded, and the power supply cable of the electrical equipment passes through the current transformer.

[0012] In some possible implementations, the circuit further includes a status acquisition module, the input of which is connected to the output port of the electric operating mechanism, and the output of which is connected to the input of the controller module.

[0013] Secondly, this utility model provides a power distribution cabinet, including a power distribution cabinet body, a partition, and a power distribution cabinet control circuit as described in any one of the above.

[0014] The inner walls on both sides of the power distribution cabinet body are provided with support members; the partition is installed on the support members, and the partition and the power distribution cabinet body enclose a receiving space; the power module, controller module, communication module, first intermediate relay and second intermediate relay are installed on the partition, the electric operating mechanism is set in the receiving space, and the electric operating mechanism module is set in the receiving space and fixedly installed on the bottom plate of the power distribution cabinet body.

[0015] In some possible implementations, the system further includes a distribution cabinet housing with an opening on one side. The distribution cabinet body is housed within the housing, with its front facing the opening. A push-pull mechanism is provided on the front of the distribution cabinet body, and limiting blocks and guide wheels are provided on both sides of the body. The guide wheels are located at the ends of the limiting blocks away from the front of the distribution cabinet body. Guide rails that cooperate with the guide wheels are provided on both sides of the inner wall of the distribution cabinet housing, and the guide wheels move along the guide rails to open or close the distribution cabinet body.

[0016] In some possible implementations, a drive mechanism is also included, which is disposed within the accommodating space; the drive mechanism is used to drive the distribution cabinet body to open or close; a rocker arm opening is provided on the front of the distribution cabinet body, the rocker arm opening is opposite to the drive mechanism, and the rocker arm opening is used to insert a rocker arm from outside the distribution cabinet body to drive the drive mechanism to operate.

[0017] In some possible implementations, the front of the power distribution cabinet body is provided with a first opening, and the power distribution cabinet also includes a monitoring equipment mounting plate. The first opening is matched with the size of the monitoring equipment mounting plate, and the monitoring equipment mounting plate is disposed at the first opening.

[0018] The monitoring equipment mounting plate has a second opening in the middle, which matches the size of the monitoring equipment's display screen. The side of the power distribution cabinet body has a rotating shaft. The end of the monitoring equipment mounting plate near the side of the power distribution cabinet body has a rotating shaft hole. The rotating shaft includes a fixed base and a rotating shaft. The rotating shaft hole is installed on the rotating shaft, allowing the monitoring equipment mounting plate to rotate.

[0019] This utility model provides a control circuit for a power distribution cabinet. By introducing a 12V low-voltage module, a controller module, and a communication module, the low-voltage module supplies power to the controller module and the communication module. The controller module is connected to the electric operating mechanism through an intermediate relay, and the controller module establishes a connection with the cloud through the communication module. The cloud sends opening and closing signals, which reach the controller module after passing through the communication module. The controller module controls the coil of the intermediate relay to be energized or de-energized, causing the relay to engage or disengage, thereby completing the opening and closing operation and realizing remote control of the power distribution cabinet.

[0020] This utility model provides a power distribution cabinet that adds a low-voltage section. It adopts a partition structure to divide the power distribution cabinet body into two receiving platforms and re-layouts the electrical components. The digital remote control components are installed on the partition, while the components in the high-voltage area are installed on the bottom plate of the power distribution cabinet body. By modularizing the power distribution cabinet, the layout structure is optimized, the circuit wiring is optimized, and the fault detection efficiency is improved.

[0021] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0022] Figure 1 This is a structural diagram of a power distribution cabinet control circuit according to one embodiment of the present utility model;

[0023] Figure 2 This is a first-view structural schematic diagram of a power distribution cabinet according to one embodiment of the present utility model;

[0024] Figure 3 This is a structural schematic diagram of a power distribution cabinet from a second perspective in one embodiment of the present invention;

[0025] Figure 4 This is a partial structural schematic diagram of a power distribution cabinet from a third-view perspective in one embodiment of the present invention. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this application clearer, the present invention will be described in further detail below with reference to the accompanying drawings.

[0027] It should be understood that the described embodiments are merely some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0028] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a,” “the,” and “the” used in this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0029] In the following description, when referring to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims. In the description of this application, it should be understood that the terms "first," "second," "third," etc., are used only to distinguish similar objects and are not necessarily used to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0030] Furthermore, in the description of this application, unless otherwise stated, "several" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0031] Firstly, please refer to Figure 1 , Figure 1This is a structural diagram of a power distribution cabinet control circuit according to one embodiment of the present utility model.

[0032] This utility model provides a power distribution cabinet control circuit, including: a power supply module 1, a controller module 2, a communication module 3, and an electric operating mechanism module 4; the power supply module 1 supplies power to the controller module 2 and the communication module 3 respectively;

[0033] The input terminal of the controller module 2 is connected to the output terminal of the communication module 3. The controller module 2 is used to receive control signals from the electric operating mechanism module 4 sent from the cloud through the communication module 3.

[0034] The electric operating mechanism module 4 includes a first intermediate relay 41, a second intermediate relay 42, and an electric operating mechanism 43; the output terminal of the controller module 2 is connected to the power supply terminals of the first intermediate relay 41 and the second intermediate relay 42 respectively; the first normally closed terminal of the first intermediate relay 41 is connected to the first normally open terminal of the second intermediate relay 42, and the first normally closed terminal of the second intermediate relay 42 is connected to the normally open terminal of the first intermediate relay 41; the first common terminal of the first intermediate relay 41 and the second intermediate relay 42 is connected to the closing input port and the opening input port of the electric operating mechanism 43 respectively.

[0035] The power supply module is a 12V industrial power supply used to power the control circuit of the power distributor. In one embodiment, the live wire port and neutral wire port of the power supply module are respectively connected to an air switch. In one embodiment, the controller module is an OA0-860k module, and the communication module is a serial port server. The controller module and the communication module are communicatively connected. The communication module establishes a connection with the cloud. The serial port server is used for protocol conversion and to receive control signals sent from the cloud, and then sends the control signals to the controller module. The controller module controls the switching of the intermediate relay according to the control signals, thereby completing the opening and closing operation.

[0036] The circuit also includes a changeover switch 5 and a button module 6; the first and third terminals of the changeover switch 5 are respectively connected to the electrical equipment, the second terminal of the changeover switch 5 is connected to the button module, the fourth terminal of the changeover switch 5 is respectively connected to the first intermediate relay 41 and the second intermediate relay 42, and the seventh and eighth terminals of the changeover switch 5 are connected to the controller module 2; the button module 6 is connected to the closing input port and the opening input port of the electric operating mechanism.

[0037] The button module 6 includes a closing button and a closing button, which control the closing and opening of the electric operating mechanism, respectively. The changeover switch is used to change the control mode of the distribution cabinet. In one embodiment, the changeover switch includes a left position, a middle position, and a right position. When the changeover switch is adjusted to the left position, terminals 1-2 and 5-6 of the changeover switch are connected, and the distribution cabinet is adjusted to local control mode. The button module is connected to the circuit, and the closing and opening of the distribution cabinet are controlled by using the closing and opening buttons. When the changeover switch is adjusted to the right position, terminals 3-4 and 7-8 of the changeover switch are connected, and the distribution cabinet is adjusted to remote control mode. The detection circuit and intermediate relay circuit of the controller module are connected, and the remote control of the distribution cabinet's closing and opening is realized through the controller module.

[0038] In this embodiment, the switch can be used to control the power distribution cabinet to select local control mode and remote control mode, thereby controlling the power distribution cabinet according to different inspection conditions and improving inspection efficiency.

[0039] The circuit also includes a monitoring device 7; the neutral input port of the monitoring device 7 is connected to the output port of the electric operating mechanism module 4, and the monitoring device 7 is connected to the electrical equipment through a three-phase circuit; the output of the monitoring device 7 is connected to the communication module; the monitoring device 7 is used to send the current and voltage data of the electrical equipment to the cloud through the communication module 3.

[0040] The monitoring device is a three-phase power monitor. It is connected to the electrical equipment via a three-phase circuit, forming a voltage detection loop to detect the voltage value of the electrical equipment and achieve voltage monitoring. Furthermore, the monitoring device is also connected to a communication module. In one embodiment, the monitoring device and the communication device are connected via an RS485 bus, and the monitoring device uploads the current and voltage data of the electrical equipment to the cloud via the communication device.

[0041] The circuit also includes a surge protector module 8, which is connected to the three-phase circuit. The monitoring device 7 is connected to the electrical equipment through the surge protector module 8.

[0042] In one embodiment, the surge protector module 8 includes a first fuse, a second fuse, and a third fuse, which are respectively connected to phase A, phase B, and phase C of a three-phase circuit. The fuses are connected to the three-phase circuit to prevent damage to electrical equipment from instantaneous high voltage.

[0043] The circuit also includes a current transformer group 9; the current transformer group 9 includes several current transformers, the first terminal of the current transformer is connected to the positive secondary terminal of the current transformer of the monitoring device 7, the second terminal of the current transformer is grounded, and the power supply cable of the electrical equipment passes through the current transformer.

[0044] In this embodiment, the current transformer group is connected to the monitoring equipment. The current transformer group includes an A-phase current transformer, a B-phase current transformer, and a C-phase current transformer. The A-phase, B-phase, and C-phase cables of the electrical equipment pass through the current transformers respectively, thereby detecting the operating current value.

[0045] The circuit also includes a status acquisition module 10, the input terminal of which is connected to the output port of the electric operating mechanism, and the output terminal of which is connected to the input terminal of the controller module.

[0046] In one embodiment, the status acquisition module 10 is an auxiliary contact module, including normally open contacts and normally closed contacts. When the electric operating mechanism opens, the normally closed contacts close; when the electric operating mechanism closes, the normally closed contacts open. The status acquisition module changes the contact state according to the output signal of the electric operating mechanism, and the controller module reads the state change to detect the state of the electric operating mechanism, thereby performing status monitoring of the electric operating mechanism.

[0047] The circuit also includes a fourth fuse, through which the second terminal of the changeover switch is connected to the three-phase circuit.

[0048] The circuit also includes an indicator light group, which includes a closing indicator light and an opening indicator light. The closing indicator light and the opening indicator light are respectively connected to the status acquisition module.

[0049] In one embodiment, the closing indicator light is red and the opening indicator light is green, and the corresponding indicator light is lit according to the opening and closing status of the electric operating mechanism.

[0050] In this embodiment, the control circuit of the power distribution cabinet introduces a 12V low-voltage module, a controller module, and a communication module. The low-voltage module supplies power to the controller module and the communication module. The controller module is connected to the electric operating mechanism through an intermediate relay. The controller module establishes a connection with the cloud through the communication module. The cloud sends opening and closing signals. After the signals pass through the communication module, they reach the controller module. The controller module controls the coil of the intermediate relay to be energized or de-energized, causing the relay to engage or disengage, thereby completing the opening and closing operation and realizing remote control of the power distribution cabinet.

[0051] This utility model provides a control circuit for a power distribution cabinet. Through a switch, the power distribution cabinet can be configured into local control mode and remote control mode. In local control mode, pressing the closing and opening buttons controls the opening and closing of the power distribution cabinet. In remote control mode, the controller module establishes a connection with the cloud via a communication module. The cloud sends data to the controller module, causing the controller module to control the operation of intermediate relays, thereby changing the opening and closing of the electric operating mechanism. The controller module can monitor the status of the electric operating mechanism in real time and perform fault detection. Operators can remotely control the opening and closing of the power distribution cabinet based on the received current and voltage information, thus greatly reducing the consumption and maintenance costs of manual inspections.

[0052] Secondly, please refer to Figures 2 to 4 , Figure 2 This is a first-view structural schematic diagram of a power distribution cabinet according to one embodiment of the present utility model; Figure 3 This is a second-view structural schematic diagram of a power distribution cabinet according to one embodiment of the present invention. Figure 4 This is a partial structural schematic diagram of a power distribution cabinet from a third-view perspective in one embodiment of the present invention.

[0053] This utility model provides a power distribution cabinet, including a power distribution cabinet body 100, a partition 110, and a power distribution cabinet control circuit as described in the above embodiment;

[0054] The inner walls of both sides of the power distribution cabinet body 100 are provided with support members 101; the partition 110 is installed on the support members 101, and the partition 110 and the power distribution cabinet body 100 enclose a receiving space; the power module 1, the controller module 2, the communication module 3, the first intermediate relay 41 and the second intermediate relay 42 are installed on the partition 110, and the electric operating mechanism 43 is arranged in the receiving space and fixedly installed on the bottom plate of the power distribution cabinet body 100.

[0055] The distribution cabinet also includes a cabinet shell (not shown in the figure), one side of which is open. The cabinet body 100 is housed within the cabinet shell, with the front of the cabinet body 100 facing the opening of the cabinet shell. A push-pull member 102 is provided on the front of the cabinet body, and limiting blocks 103 and guide wheels 104 are respectively provided on both sides of the cabinet body. The guide wheels 104 are located at the ends of the limiting blocks 103 away from the front of the cabinet body 100. Guide rails that cooperate with the guide wheels 104 are provided on both sides of the inner wall of the cabinet shell. The guide wheels 104 move along the guide rails to open or close the cabinet body 100.

[0056] The power distribution cabinet also includes a drive mechanism (not shown), which is disposed within the accommodating space. The drive mechanism is used to drive the power distribution cabinet body 100 to open or close. A rocker arm opening 105 is provided on the front of the power distribution cabinet body 100. The rocker arm opening 105 is opposite to the drive mechanism, and the rocker arm opening 105 is used to insert a rocker arm from outside the power distribution cabinet body 100 to drive the drive mechanism to operate.

[0057] The front of the power distribution cabinet body 100 is provided with a first opening 106. The power distribution cabinet also includes a monitoring equipment mounting plate 120. The first opening 106 is matched in size with the monitoring equipment mounting plate 120. The monitoring equipment mounting plate 120 is located at the first opening 106.

[0058] The monitoring equipment mounting plate 120 has a second opening 121 in the middle, which matches the size of the monitoring equipment's display screen. The side of the power distribution cabinet body 100 is provided with a rotating shaft 130. The end of the monitoring equipment mounting plate 120 near the side of the power distribution cabinet body 100 is provided with a rotating shaft hole 121. The rotating shaft part 130 includes a fixed base and a rotating shaft. The rotating shaft hole 121 is installed on the rotating shaft, allowing the monitoring equipment mounting plate 120 to rotate.

[0059] This utility model provides a power distribution cabinet that adds a low-voltage section. It adopts a partition structure to divide the power distribution cabinet body into two receiving platforms and rearranges the electrical components. The digital remote control components are installed on the partition, while the components in the high-voltage area are installed on the bottom plate of the power distribution cabinet body. By modularizing the power distribution cabinet, the layout structure is optimized, the circuit wiring is optimized, and the fault detection efficiency is improved.

[0060] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A control circuit for a power distribution cabinet, characterized in that, include: The system includes a power supply module, a controller module, a communication module, and an electric operating mechanism module; the power supply module provides power to both the controller module and the communication module. The input terminal of the controller module is connected to the output terminal of the communication module, and the controller module is used to receive control signals of the electric operating mechanism sent from the cloud through the communication module; The electric operating mechanism module includes a first intermediate relay, a second intermediate relay, and an electric operating mechanism; the output terminal of the controller module is connected to the power supply terminals of the first intermediate relay and the second intermediate relay respectively; the first normally closed terminal of the first intermediate relay is connected to the first normally open terminal of the second intermediate relay, and the first normally closed terminal of the second intermediate relay is connected to the normally open terminal of the first intermediate relay. The first common terminal of the first intermediate relay and the second intermediate relay are respectively connected to the closing input port and the opening input port of the electric operating mechanism.

2. The control circuit for the distribution cabinet according to claim 1, characterized in that, The circuit also includes a selector switch and a button module; The first and third terminals of the changeover switch are respectively connected to the electrical equipment, the second terminal of the changeover switch is connected to the button module, the fourth terminal of the changeover switch is respectively connected to the first intermediate relay and the second intermediate relay, and the seventh and eighth terminals of the changeover switch are connected to the controller module; the button module is connected to the closing input port and the opening input port of the electric operating mechanism.

3. The control circuit for the distribution cabinet according to claim 1, characterized in that, The circuit also includes a monitoring device; the neutral input port of the monitoring device is connected to the output port of the electric operating mechanism module, and the monitoring device is connected to the electrical equipment through a three-phase circuit; the output of the monitoring device is connected to the communication module; the monitoring device is used to send the current and voltage data of the electrical equipment to the cloud through the communication module.

4. The control circuit for the distribution cabinet according to claim 3, characterized in that, The circuit also includes a surge protector module, which is connected to the three-phase circuit. The monitoring device is connected to the electrical equipment through the surge protector module.

5. The control circuit for the distribution cabinet according to claim 3, characterized in that, The circuit also includes a current transformer group; the current transformer group includes several current transformers, the first terminal of the current transformer is connected to the positive secondary terminal of the current transformer of the monitoring equipment, the second terminal of the current transformer is grounded, and the power supply cable of the electrical equipment passes through the current transformer.

6. The control circuit for the distribution cabinet according to claim 1, characterized in that, The circuit also includes a status acquisition module, the input of which is connected to the output port of the electric operating mechanism, and the output of which is connected to the input of the controller module.

7. A power distribution cabinet, characterized in that, Includes the power distribution cabinet body, partition, and a power distribution cabinet control circuit as described in any one of claims 1-6; The inner walls on both sides of the power distribution cabinet body are provided with support members; the partition is installed on the support members, and the partition and the power distribution cabinet body enclose a receiving space; the power module, controller module, communication module, first intermediate relay and second intermediate relay are installed on the partition, and the electric operating mechanism is set in the receiving space and fixedly installed on the bottom plate of the power distribution cabinet body.

8. The power distribution cabinet according to claim 7, characterized in that, It also includes a distribution cabinet shell, one side of which is open, and the distribution cabinet body is housed within the distribution cabinet shell, with the front of the distribution cabinet body facing the opening of the distribution cabinet shell; the front of the distribution cabinet body is provided with a push-pull component, and the two sides of the distribution cabinet body are respectively provided with a limiting block and a guide wheel, with the guide wheel located at the end of the limiting block away from the front of the distribution cabinet body; the inner walls of the distribution cabinet shell are provided with guide rails on both sides that cooperate with the guide wheel, and the guide wheel moves along the guide rail to open or close the distribution cabinet body.

9. The power distribution cabinet according to claim 8, characterized in that, It also includes a drive mechanism, which is disposed within the accommodating space; the drive mechanism is used to drive the distribution cabinet body to open or close; the front of the distribution cabinet body is provided with a rocker opening, which is opposite to the drive mechanism, and the rocker opening is used to insert a rocker from outside the distribution cabinet body to drive the drive mechanism to operate.

10. The power distribution cabinet according to claim 7, characterized in that, The front of the power distribution cabinet body has a first opening, and the power distribution cabinet also includes a monitoring equipment mounting plate. The first opening is matched with the size of the monitoring equipment mounting plate, and the monitoring equipment mounting plate is set at the first opening. The monitoring equipment mounting plate has a second opening in the middle, which matches the size of the monitoring equipment's display screen. The side of the power distribution cabinet body has a rotating shaft. The end of the monitoring equipment mounting plate near the side of the power distribution cabinet body has a rotating shaft hole. The rotating shaft includes a fixed base and a rotating shaft. The rotating shaft hole is installed on the rotating shaft, allowing the monitoring equipment mounting plate to rotate.

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