CN204927856U - A statically adjustable power supply cabinet - Google Patents

Abstract

The utility model relates to a statically adjustable power supply cabinet, which comprises a cabinet body, an isolating switch, a circuit breaker, a contactor, a fuse, a shunt, a relay and a programmable controller. The cabinet is provided with a primary element room and a secondary control Component room, a protective partition is provided between the primary component room and the secondary control component room, the isolating switch, circuit breaker, contactor, fuse and shunt are located in the primary component room, the relay and the The programming controller is located in the secondary control element compartment. The utility model adopts an integrated structural design, which integrates a circuit breaker, an isolating switch and a contactor, and cooperates with each other to jointly realize the power feeding function and increase the safety of the static power supply cabinet; at the same time, the primary element and the secondary The components are arranged separately in the cabinet, which not only ensures electrical safety but also reduces electromagnetic interference, and at the same time facilitates maintenance and repair.

Description

A statically adjustable power supply cabinet

technical field

The utility model relates to a switch cabinet, in particular to a statically adjustable power supply cabinet.

Background technique

After the subway vehicle is overhauled, it is necessary to carry out static debugging on the train, and carry out dynamic debugging on the test run line, and it can only be put into operation after passing the test. The static power supply cabinet can obtain DC1500V or DC750V power supply and AC220V power supply input from the outside to meet the requirements of the train's electrical equipment and air conditioning. The maintenance and commissioning needs DC1500V or DC750V, and the auxiliary power supply device of the subway train is debugged through the control system of the static power supply cabinet, and at the same time, the damage to the power grid caused by the fault of the vehicle circuit is avoided. However, the current static power supply cabinet has a certain impact on the performance of its electrical equipment due to its complex structure and chaotic arrangement of components and equipment, and at the same time there are hidden dangers in terms of safety and convenience.

Utility model content

The technical problem to be solved by the utility model is to provide a statically adjustable power supply cabinet with excellent performance, high safety and convenient use.

The technical scheme of the utility model for solving the above-mentioned technical problems is as follows: a statically adjustable power supply cabinet, including a cabinet body, an isolating switch, a circuit breaker, a contactor, a fuse, a shunt, a relay and a programmable controller. There is a primary element room and a secondary control element room, a protective partition is provided between the primary element room and the secondary control element room, and the isolating switch, circuit breaker, contactor, fuse and shunt are located in the primary In the component room, the relay and programmable controller are located in the secondary control component room, and the isolating switch, circuit breaker, contactor, fuse and shunt are connected in series in sequence, and the isolating switch, circuit breaker and contactor are respectively It is electrically connected with the relay and the programmable controller.

The beneficial effects of the utility model are: the utility model adopts an integrated structural design, which integrates a circuit breaker, a disconnector, and a contactor, cooperates with each other, and jointly realizes the power feeding function. The power supply passes through the disconnector, the circuit breaker and the contactor in sequence These three components are electrically interlocked. You must first close the isolating switch manually, then close the DC fast circuit breaker, and finally close the contactor to realize the power transmission process together, adding a static power supply cabinet At the same time, the utility model arranges the primary element and the secondary element separately in the cabinet, and the circuit breaker, contactor, isolating switch, fuse, shunt and other primary elements are located in the primary element room, and the programmable controller, Secondary control equipment such as relays are located in the secondary control component room, which not only ensures electrical safety but also reduces electromagnetic interference, and at the same time facilitates maintenance and repair.

On the basis of the above technical solutions, the utility model can also be improved as follows.

Further, it also includes a DC voltage transmitter, the DC voltage transmitter is located in the secondary control element room, one end of the DC voltage transmitter is electrically connected to the shunt, and the DC voltage transmitter The other end of the device is electrically connected to the programmable controller.

The beneficial effect of adopting the above-mentioned further scheme is: for the input and output voltage, the current fluctuation may damage the components, and the circuit fault may have an impact on the power grid, the utility model adopts overvoltage, overcurrent and reverse current protection; voltage protection: measured value Including the incoming line voltage and the feeder line voltage, which are sampled at the incoming line end and the outgoing line end respectively, converted into a low voltage signal by the DC voltage transmitter and input to the programmable controller for logic operation to realize display and protection functions; overcurrent and reverse current protection: Sampling at the shunt, processed by the DC voltage transmitter and then input to the programmable controller for logic operation to realize over-current and reverse-current protection.

Further, the cabinet is also provided with a busbar room and a cable room, the busbar room and the cable room are located at the rear of the primary element room and the secondary control element room, and the positive busbar, feeder Loop and cable connectors, cables are connected to the cable connectors, cable fixing brackets, cable laying channels and fixing parts are arranged in the cable chamber, and the cables pass through the busbar chamber and extend into the cables in the cable chamber Lay it on the channel and fix it with cable fixing brackets or fixings.

Further, the cable includes an output cable, and the end of the output cable is equipped with a plug that matches the input hole of the train.

The beneficial effect of adopting the above further solution is that the output cable of the static power supply cabinet is equipped with a special plug at the end of the cable, which can be plugged and played, and is convenient for train input.

Further, a warning light is provided on the top of the cabinet, the warning light is a combined warning light, a galvanized cover plate with cable perforation is installed on the bottom of the cabinet, and an insulating cable fixing device is provided on the cover plate .

The beneficial effect of adopting the above further scheme is: a warning light is designed on the top of the cabinet, and the warning light is a combined warning light. When the secondary control circuit in the cabinet is powered, the yellow light is on, indicating that the static power supply cabinet can be operated at this time; When the primary component is powered on, the red light is on and flashes, which acts as a warning; the cover plate at the bottom of the cabinet can not only ensure the protection level specified by the switch cabinet, but also prevent small animals and snakes from entering the switch cabinet through the cable trench in humid areas. It will cause short-circuit accidents, and at the same time reduce the corrosion of the moisture in the cable trench to the internal equipment of the switchgear and shorten the service life of the switchgear.

Further, a cabinet door is provided at the front of the cabinet, and an electromagnetic lock is provided on the cabinet door, and the electromagnetic lock is interlocked with the circuit breaker.

The beneficial effect of adopting the above-mentioned further scheme is: the cabinet door is designed with an electromagnetic lock, and the electromagnetic lock is electrically interlocked with the circuit breaker. When the primary component is charged, the cabinet door cannot be opened to prevent operators and maintenance personnel from entering the charged interval by mistake. If the door is forcibly opened , The circuit breaker trips and automatically cuts off the power supply, ensuring the safety of personnel.

Further, it also includes an emergency stop button, the emergency stop button is electrically connected with the circuit breaker and the contactor respectively, the emergency stop button is provided with two, and one of the emergency stop buttons is located on the cabinet door, wherein The other emergency stop button is located at a preset position away from the cabinet body.

The beneficial effect of adopting the above further solution is: there are two emergency stop buttons, one of which is located on the cabinet door, and the other of which is located at a preset position away from the cabinet body , it can be installed on the column next to the vehicle for maintenance in the garage. In an emergency, you can press the emergency stop button on the cabinet door or on the column next to the vehicle to be inspected, and the circuit breaker and contactor in the cabinet will trip immediately, thereby cutting off The power supply is convenient and simple to operate, and realizes emergency shutdown.

Further, a communication interface is reserved on the programmable controller, and there are two communication interfaces, one of which is electrically connected to the local display screen, and the other of which is electrically connected to the remote integrated control room .

The beneficial effect of adopting the above-mentioned further solution is: reserve a communication interface on the programmable controller, and the programmable controller has two communication interfaces, one of which is reserved for the local area and can be connected to the display screen, and the other communication port is reserved for the remote place In the comprehensive control room, information collection and operation can be carried out on the local display screen and in the remote place; the opening and closing of circuit breakers and contactors can also be operated in the remote comprehensive control room, so that the utility model statically adjustable power supply cabinet can realize the functions of control, protection and detection. Digitization, intelligence and networking.

Further, the circuit breaker is equipped with an arc blowing device, and the contactor is provided with an exchange hole.

The beneficial effect of adopting the above further scheme is: the circuit breaker is equipped with a separate arc blowing device to increase the along-axis gradient of the arc column voltage; the contactor adds an exchange hole on the contactor, and uses high-speed flowing air to increase the electric current between the arc gaps. Insulation strength, so as to achieve arc extinguishing; at the same time, on the disconnector, the opening distance of the contacts can be increased to increase the arc length to finally extinguish the arc. The utility model adopts a combination of multiple arc extinguishing methods to improve the performance of the components.

Further, a leakage protector is provided on the cabinet, and the leakage protector is electrically connected to the programmable controller.

The beneficial effect of adopting the above-mentioned further scheme is: install a leakage protector on the cabinet body, and the auxiliary point of the leakage protector is connected to the programmable controller module. The trip contactor thus breaks the power supply, effectively ensuring the safety of the operation site.

Description of drawings

Fig. 1 is a schematic structural view of a statically adjustable power supply cabinet of the present invention;

Fig. 2 is a side view of a statically adjustable power supply cabinet of the present invention.

In the accompanying drawings, the list of parts represented by each label is as follows:

1. Cabinet body, 2. Isolating switch, 3. Circuit breaker, 4. Contactor, 5. Primary element room, 6. Secondary control element room, 7. Protective partition, 8. Busbar room, 9. Cable room, 10. Warning light, 11. Cover plate, 12. Cabinet door, 13. Electromagnetic lock.

Detailed ways

The principles and features of the present utility model are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the utility model, and are not used to limit the scope of the utility model.

As shown in Figure 1 and Figure 2, a statically adjustable power supply cabinet includes a cabinet body 1, an isolating switch 2, a circuit breaker 3, a contactor 4, a fuse, a shunt, a relay, a programmable controller and a DC voltage transmitter , the cabinet 1 is provided with a primary element chamber 5 and a secondary control element chamber 6, a protective partition 7 is provided between the primary element chamber 5 and the secondary control element chamber 6, and the isolation switch 2, The circuit breaker 3, contactor 4, fuse and shunt are located in the primary element chamber 5, the relay, programmable controller and DC voltage transmitter are located in the secondary control element chamber 6, and the circuit breaker 3 , contactor 4, isolating switch 2, fuse, and shunt are primary components, and programmable controllers and relays are secondary components. The primary components and secondary components are placed in different rooms to ensure electrical safety and prevent electromagnetic interference. , but also easy maintenance. The isolating switch 2, circuit breaker 3, contactor 4, fuse and shunt are connected in series in sequence; the external 1500V or 750V direct current flows through the isolating switch 2, circuit breaker 3, contactor 4, fuse and shunt in sequence, and is delivered to On the train, the isolating switch 2, the circuit breaker 3, and the contactor 4 are used to close and control the power supply. These three components adopt electrical interlocking, and the isolating switch 2 must be closed manually before closing the circuit breaker 3. , and finally close the contactor 4 to jointly realize the power transmission process, and the fuse can quickly break the overcurrent to prevent the overcurrent from burning out the electrical equipment on the train. The isolating switch 2, the circuit breaker 3 and the contactor 4 are electrically connected to the relay and the programmable controller respectively, one end of the DC voltage transmitter is electrically connected to the shunt, and the DC voltage transmitter The other end is electrically connected to the programmable controller; wherein, the shunt realizes the sampling of direct current, and finally transmits the current signal to the programmable controller to realize current measurement and current protection. The utility model adopts overvoltage, Overcurrent and reverse current protection; voltage protection: the measured values include incoming line voltage and feeder line voltage, which are sampled at the incoming line end and outgoing line end respectively, converted into low voltage signals by DC voltage transmitters and input to programmable controllers for logic operations to realize Display and protection functions; over-current and reverse-current protection: samples are taken at the shunt, processed by the DC voltage transmitter, and then input to the programmable controller for logic operation to realize over-current and reverse-current protection, avoiding input and output voltage and current fluctuations, which can be corrected Damage to components and circuit failures may have an impact on the grid.

The cabinet body 1 is provided with a leakage protector, which is connected to the programmable controller; a leakage protector is installed in the static power supply cabinet, and the auxiliary point of the leakage protector is connected to the programmable controller. If the leakage protector Action, the programmable controller sends a trip command, and trips the contactor within 0.1S to cut off the power supply, effectively ensuring the safety of the operating site.

The cabinet 1 is also provided with a busbar room 8 and a cable room 9, the busbar room 8 and the cable room 9 are located at the rear of the primary element room 5 and the secondary control element room 6, the busbar room 8 There are positive busbars, feeder circuits and cable connectors inside, cables are connected to the cable connectors, cable fixing brackets, cable laying channels and fixing parts are arranged in the cable chamber 9, and the cables pass through the busbar The chamber extends into the cable laying channel in the cable chamber 9 and is fixed by a cable fixing bracket or a fixing piece.

The cable includes an output cable, and the end of the output cable is equipped with a plug that matches the input hole of the train; the output cable of the static power supply cabinet is equipped with a special special plug at the end of the cable, which can be plugged and played, which is convenient for the train enter.

The top of the cabinet 1 is provided with a warning light 10, and the warning light 10 is a combined warning light; the top of the cabinet 1 is designed with a warning light, and the warning light is a combined warning light, which is composed of a red light and a yellow light. The light is connected to the secondary control circuit in the cabinet, and the red light is connected to the primary component circuit in the cabinet. When the secondary control circuit in cabinet 1 is powered, the yellow light is on, indicating that the static power supply cabinet can be operated at this time. When the primary element is powered on, the red light is on and flashing, which acts as a warning. The bottom of the cabinet body 1 is equipped with a cover plate 11 with cable perforation and galvanized, and the cover plate 11 is provided with an insulating cable fixing device; the cover plate 11 at the bottom of the cabinet body 1 can not only ensure the protection level specified by the switch cabinet, Prevent small animals and snakes from entering the switchgear from the cable trench in humid areas to cause short-circuit accidents, and also reduce the corrosion of the moisture in the cable trench to the internal equipment of the switchgear and shorten the service life of the switchgear.

The front portion of the cabinet body 1 is provided with a cabinet door 12, and the cabinet door 12 is provided with an electromagnetic lock 13, and the electromagnetic lock 13 is interlocked with the circuit breaker 3; the cabinet door 12 is designed with an electromagnetic lock 13, and the electromagnetic lock 13 is electrically interlocked with the circuit breaker 3. When the primary component is charged, the cabinet door 12 cannot be opened to prevent operators and maintenance personnel from accidentally entering the electrified interval. If the door is forcibly opened, the circuit breaker 3 trips and automatically cuts off the power supply, ensuring the safety of personnel. Safety.

The utility model is also provided with an emergency stop button, and the emergency stop button is electrically connected with the circuit breaker 3 and the contactor 4 respectively. There are two emergency stop buttons, and one of the emergency stop buttons is located in the cabinet On the door 12, the other said emergency stop button is located at a preset position away from the cabinet body, and this preset position can be on the column next to the garage maintenance vehicle; in an emergency, you can press the cabinet door 12 or It is the emergency stop button on the column next to the vehicle to be inspected, and the circuit breaker 3 and contactor 4 of the static control cabinet trip immediately, thereby cutting off the power supply. The operation is convenient and simple, and the emergency shutdown is realized.

A communication interface is reserved on the programmable controller, and there are two communication interfaces; one of which is reserved for the local area and can be connected to the display screen, and the other communication interface is reserved for the remote integrated control room, where the local display screen and Information collection and operation can be carried out remotely. The signals that can be collected include position signals of isolating switches, circuit breakers and contactors, all accidents and alarm signals in the static control cabinet, and analog quantity collection of voltage and current. In the remote integrated control room It can also operate the opening and closing of circuit breakers and contactors.

The circuit breaker is equipped with an arc blowing device, and the contactor is provided with an exchange hole. The circuit breaker is equipped with a separate arc blowing device to increase the gradient of the arc column voltage along the axis; the contactor is additionally opened on the contactor. Holes, using high-speed flowing air to increase the electrical insulation strength between the arc gaps, so as to achieve arc extinguishing; at the same time, the opening distance of the contacts can also be increased on the disconnector to increase the arc length to finally extinguish the arc. The utility model adopts a combination of multiple arc extinguishing methods to improve the performance of the components.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (10)

1. a quiet tune power cabinet, it is characterized in that: comprise cabinet, isolating switch, circuit breaker, contactor, fuse, shunt, relay and Programmable Logic Controller, primary element room and linear quadratic control element chamber is provided with in described cabinet, guard screen is provided with between described primary element room and linear quadratic control element chamber, described isolating switch, circuit breaker, contactor, it is indoor that fuse and shunt are positioned at described primary element, described relay and Programmable Logic Controller are positioned at described linear quadratic control element chamber, described isolating switch, circuit breaker, contactor, fuse and shunt are connected successively, described isolating switch, circuit breaker and contactor are electrically connected with described relay and Programmable Logic Controller respectively.

2. the quiet tune power cabinet of one according to claim 1, it is characterized in that: also comprise direct voltage transmitter, described direct voltage transmitter is arranged in described linear quadratic control element chamber, one end of described direct voltage transmitter is electrically connected with described shunt, and the other end of described direct voltage transmitter is electrically connected with described Programmable Logic Controller.

3. the quiet tune power cabinet of one according to claim 1 and 2, it is characterized in that: in described cabinet, be also provided with bus-bar room and cable vault, described bus-bar room and cable vault are positioned at the rear portion of described primary element room and linear quadratic control element chamber, positive pole busbar is provided with in described bus-bar room, feeding circuit and cable connector, described cable connector is connected with cable, cable stationary barrier is provided with in described cable vault, cable laying passage and fixture, described cable passes bus-bar room and stretches on the cable laying passage in described cable vault, and fixed by cable stationary barrier or fixture.

4. the quiet tune power cabinet of one according to claim 3, is characterized in that: described cable comprises output cable, and the termination of described output cable is equipped with the plug matched with train input hole.

5. the quiet tune power cabinet of one according to claim 1 and 2, it is characterized in that: described cabinet top is provided with warning lamp, described warning lamp is Combined warning lamp, and described bottom of cabinet bulk is provided with tape cable perforation and zinc-plated cover plate, and described cover plate is provided with insulated cable fixture.

6. the quiet tune power cabinet of one according to claim 1 and 2, it is characterized in that: the front portion of described cabinet is provided with cabinet door, described cabinet door is provided with electromagnetic lock, and described electromagnetic lock and described circuit breaker are interlocked.

7. the quiet tune power cabinet of one according to claim 6, it is characterized in that: also comprise scram button, described scram button is electrically connected with described circuit breaker and contactor respectively, described scram button is provided with two, scram button described in one of them is positioned on described cabinet door, and wherein scram button described in another is positioned on the predeterminated position away from cabinet.

8. the quiet tune power cabinet of one according to claim 1 and 2, it is characterized in that: described Programmable Logic Controller is reserved with communication interface, described communication interface is provided with two, communication interface described in one of them is electrically connected with local display screen, and wherein communication interface described in another is electrically connected with long-range comprehensive control room.

9. the quiet tune power cabinet of one according to claim 1 and 2, it is characterized in that: described circuit breaker is equipped with arc-blowing device, described contactor is provided with exchange hole.

10. the quiet tune power cabinet of one according to claim 1 and 2, it is characterized in that: described cabinet is provided with earth leakage protective device, described earth leakage protective device is electrically connected with Programmable Logic Controller.