CN116054008A - Multifunctional power distribution device with oil temperature and oil level protection function - Google Patents
Multifunctional power distribution device with oil temperature and oil level protection function Download PDFInfo
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- CN116054008A CN116054008A CN202310075976.4A CN202310075976A CN116054008A CN 116054008 A CN116054008 A CN 116054008A CN 202310075976 A CN202310075976 A CN 202310075976A CN 116054008 A CN116054008 A CN 116054008A
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- 238000009826 distribution Methods 0.000 title claims abstract description 24
- 238000005065 mining Methods 0.000 claims abstract description 36
- 230000001012 protector Effects 0.000 claims abstract description 25
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- 239000007788 liquid Substances 0.000 claims abstract description 16
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- 238000002955 isolation Methods 0.000 claims description 12
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B15/00—Supervisory desks or panels for centralised control or display
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B7/00—Enclosed substations, e.g. compact substations
- H02B7/06—Distribution substations, e.g. for urban network
- H02B7/08—Underground substations
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal fluid pressure, liquid level or liquid displacement, e.g. Buchholz relays
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/40—Display of information, e.g. of data or controls
Abstract
The invention discloses a multifunctional power distribution device with oil temperature and oil level protection, which comprises a comprehensive protector based on PLC, a display screen, an intermediate relay, a contact relay, a vacuum alternating current contactor, an isolated phase change switch and an explosion-proof shell, wherein the protective layer is arranged on the display screen; the comprehensive protector is connected with a display screen, the PLC and the display screen are internally provided with software programs which are verified and optimized, the display screen is provided with a man-machine interaction interface, and the multifunctional power distribution device can be used as a matching of a mining frequency converter or can be used for controlling and protecting a water pump and an oil pump. The intelligent control system has high intelligent degree, can control a plurality of water pumps and oil pumps, can provide overload, short circuit, overvoltage, undervoltage and other protection for the oil pump motor of the water pump motor, can realize automatic control of liquid level and oil level according to the setting, and effectively solves the defect that most of domestic mining frequency converters have no power frequency loop, and has the advantages of space reduction, centralized and unified management and intelligent control.
Description
Technical Field
The invention relates to the technical field of circuit control, in particular to a multifunctional power distribution device with oil temperature and oil level protection, a frequency converter with the power distribution device and a transformer substation with the frequency converter, and particularly relates to a mining underground mobile transformer substation.
Background
At present, most of the control of the water pump of the underground coal mine pump house pump station is controlled by an old winch switch. The winch switch has the following defects: 1) The winch switch is a single-loop switch, one can only control one water pump or oil pump, and the pump house pump station generally has more than ten water pumps or oil pumps to control, needs a large number of winch switches, occupies a large amount of space, has limited underground space of a coal mine, and is time-consuming and labor-consuming in wiring construction. 2) The old winch switch has poor reliability due to extremely low material consumption and cost due to limited price. 3) The intelligent degree of the winch switch is very low, and the water level and the oil level cannot be automatically controlled; and the plurality of winch switches cannot be controlled online, intelligent control equipment is required to be added, and cost and workload are increased.
A frequency converter used in high-risk environments such as coal mines is used for supplying power to a high-power motor under the coal mines and providing a protection function. Most of the existing frequency converters on the mine at the present stage have no power frequency loop, and when the frequency converter fails, the standby power frequency loop cannot be immediately put into service or the frequency converter can be replaced, so that the production is seriously affected. And part of the coal mine frequency converters are directly connected with the mining mobile substation, an isolating device is not arranged in the middle, when the frequency converters have serious faults such as burnout, explosion loss and the like, the power supply of the fault frequency converters cannot be cut off independently in time, and only the method of turning off the upper mobile substation can seriously influence the normal operation of other equipment and has potential safety hazards.
In order to solve the isolation problem between the mine frequency converter and the mobile substation, a mine explosion-proof isolation switch box is added between the mine frequency converter and the mobile substation, the method solves the isolation problem of the mine frequency converter, but cannot solve the problem of a standby power frequency loop, and the mine explosion-proof isolation switch box is only a simple mechanical isolation switch, is not intelligent equipment, and cannot provide intelligent functions and protection functions.
Disclosure of Invention
In order to solve the above technical problems. The invention discloses a multifunctional power distribution device with oil temperature and oil level protection, which is characterized by comprising a comprehensive protector based on PLC, a display screen, an intermediate relay, a contact relay, a vacuum alternating current contactor and an explosion-proof shell. The alternating current vacuum contactor is connected with the intermediate relay, the intermediate relay and the contact relay are distributed and connected with the comprehensive protector, the comprehensive protector is connected with the display screen, and the comprehensive protector is based on a Programmable Logic Controller (PLC), so that the defect that most of domestic mining frequency converters have no power frequency loop is effectively overcome, and when the frequency converter is used independently, the space is reduced, and centralized and unified management and intelligent control can be realized.
The complete technical scheme of the invention comprises the following steps:
a multifunctional power distribution device with oil temperature and oil level protection comprises a comprehensive protector based on a PLC, a display screen, an intermediate relay set KA, a contact relay set KJ, a vacuum alternating current contactor set KM, an isolated phase change switch and an explosion-proof shell;
further, the isolated phase change switch is connected with the alternating current vacuum contactor set KM, the alternating current vacuum contactor set KM is connected with the intermediate relay set KA, and the intermediate relay set KA and the contact relay set KJ are respectively connected with the comprehensive protector. The comprehensive protector calculates and then controls the intermediate relay group KA and the contact relay group KJ through a PLC program, and then the intermediate relay KA group controls the vacuum alternating current contactor group KM.
Further, the vacuum ac contactor group KM includes a first vacuum ac contactor KM1, a second vacuum ac contactor KM2, a third vacuum ac contactor KM3, a fourth vacuum ac contactor KM4, a fifth vacuum ac contactor KM5, and a sixth vacuum ac contactor KM6.
Further, the contact relay group KJ includes a first contact relay KJ1, a second contact relay KJ2, a third contact relay KJ3, a fourth contact relay KJ4, a fifth contact relay KJ5, and a sixth contact relay KJ6.
Further, the intermediate relay group KA includes a first intermediate relay KA1, a second intermediate relay KA2, a third intermediate relay KA3, a fourth intermediate relay KA4, a fifth intermediate relay KA5, and a sixth intermediate relay KA6.
Further, the isolating phase change switch comprises a first isolating switch and a second isolating switch, wherein the first isolating switch is connected with the front three alternating current vacuum contactors KM1-KM3, and the second isolating switch is connected with the rear three alternating current vacuum contactors KM4-KM6.
Further, the comprehensive protector is connected with a display screen, the PLC and the display screen are internally provided with software programs which are verified and optimized, and the display screen is provided with a man-machine interaction interface;
further, the multifunctional power distribution device can be used as a matching of a mining frequency converter, the first alternating current vacuum contactor KM1 is connected with the fourth alternating current vacuum contactor KM4 in parallel, the second alternating current vacuum contactor KM2 is connected with the fifth alternating current vacuum contactor KM5 in parallel, and the third alternating current vacuum contactor KM3 is connected with the sixth alternating current vacuum contactor KM6 in parallel; then the first 3 alternating current vacuum contactors (namely, a first alternating current vacuum contactor, a second alternating current vacuum contactor and a third alternating current vacuum contactor) are used as isolation elements of a mining frequency converter to be connected with the mining frequency converter, and the mining frequency converter is respectively connected with 3 motors (a first motor M1, a second motor M2 and a third motor M3); the last 3 alternating current vacuum contactors (namely, a fourth alternating current vacuum contactor, a fifth alternating current vacuum contactor and a sixth alternating current vacuum contactor) are directly connected with the 3 motors M1-M3 as a power frequency standby loop of the mining frequency converter. The 6 contact relays KJ1-KJ6 are respectively connected with 3 electric ball valves of the 3 mining frequency converters, respectively supply power to the 3 electric ball valves and control the 3 electric ball valves.
Further, the multifunctional power distribution device can be used for controlling and protecting the water pump pumps, 6 water pump pumps are directly connected to 6 vacuum alternating current contactors KM of the device,
further, the total 8 sensors of 4 oil temperatures, 3 oil levels and 1 liquid level of the water tank oil cylinder are connected to the comprehensive protector, the comprehensive protector is connected to the comprehensive protector, the setting of overrun threshold values of the liquid levels, the oil levels and the oil temperatures is carried out through a man-machine interaction interface of a display screen, real-time values of the liquid levels, the oil levels and the oil temperatures can be displayed in real time, after the real-time values of the liquid levels, the oil levels and the oil temperatures are set according to actual requirements on site, the automatic control of the oil temperatures, the oil levels and the liquid levels is realized through calculation of software programs in a PLC according to the real-time values, when the set threshold values are reached, the corresponding alternating current contactor is automatically switched on or automatically switched off, and when overrun occurs, the display screen pops up a red alarm frame to prompt overrun alarm.
Further, the frequency converter with the multifunctional power distribution device adopts a three-level four-quadrant frequency conversion machine core.
Further, the mining transformer substation with the frequency converter comprises a high-voltage part, the high-voltage part is provided with a high-voltage vacuum switch, and the high-voltage vacuum switch is controlled and protected by a high-voltage vacuum switch protection controller.
Compared with the prior art, the invention has the following beneficial effects:
the device is a multifunctional and multi-use scene, can be matched with a mining frequency converter to be used as a working frequency loop and a standby loop of the mining frequency converter, and can control a water-cooling electric ball valve of the frequency converter; the intelligent oil pump control device can also be used as a single device for underground coal mines, has the automatic control function of liquid level, oil level and oil temperature, can control a plurality of water pumps and oil pumps, can provide overload, short circuit, overvoltage, undervoltage and other protection for the oil pump motor of the water pump motor, and can realize the automatic control of the liquid level and the oil level according to the setting. The device has novel design, and effectively solves the defect that most of domestic mining frequency converters have no power frequency loop when being matched with the frequency converters for use; when being used alone, the device can replace a plurality of sets of old winch switches and single-loop starters when being applied to pump rooms and pump stations, and has the characteristics of space reduction, centralized and unified management and intelligent control. The device has high reliability and high automation degree.
Drawings
Fig. 1 is a schematic diagram of the invention in use as a companion for a mining frequency converter.
Fig. 2 is a schematic diagram of the present invention when applied solely to the control of the water pump oil pump.
Fig. 3 is a diagram showing a man-machine interface of each parameter of the pump.
Fig. 4 is an alarm diagram.
Fig. 5 is a schematic diagram of a high voltage vacuum switch protection controller of a mining substation with a power distribution device of the invention.
Description of the embodiments
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only examples and are not intended to limit the present application.
The disclosure of the present invention is schematically illustrated below.
As shown in fig. 1, the mining frequency converter with oil temperature and oil level protection disclosed by the invention is matched with a multifunctional power distribution device, and comprises a comprehensive protector based on PLC, a display screen, an intermediate relay, a contact relay, a vacuum alternating current contactor, an isolated phase change switch and an explosion-proof shell.
The comprehensive protector is a comprehensive protector based on PLC. The comprehensive protector is connected with a display screen, the PLC and the display screen are internally provided with software programs which are verified and optimized, and the display screen is provided with a man-machine interaction interface.
The isolating switch is connected with the alternating current vacuum contactor KM, the alternating current vacuum contactor KM is connected with the intermediate relay KA, and the intermediate relay KA and the contact relay KJ are respectively connected with the comprehensive protector. The comprehensive protector calculates and then controls the intermediate relay KA and the contact relay KJ through a PLC program, and then the intermediate relay KA controls the vacuum alternating current contactor KM. The invention has 2 isolating switches, 6 vacuum alternating current contactors KM1-KM6, 6 intermediate relays KA1-KA6 and 6 contact relays KJ1-KJ6. Preferably, the isolating switch comprises a first isolating switch and a second isolating switch, wherein the first isolating switch is connected with the alternating current vacuum contactors KM1-KM3, and the second isolating switch is connected with the alternating current vacuum contactors KM4-KM6.
As shown in fig. 1, when the invention is used as a matching of a mining frequency converter, a first ac vacuum contactor KM1 is connected in parallel with a fourth ac vacuum contactor KM4, KM2 is connected in parallel with KM5, and KM3 is connected in parallel with KM6. Then the first 3 alternating current vacuum contactors are used as isolation elements of a mining frequency converter to be connected with the mining frequency converter, and the mining frequency converter is respectively connected with 3 motors M1-M3; the last 3 alternating current vacuum contactors are directly connected with 3 motors M1-M3 as power frequency standby loops of the mining frequency converter. The 6 contact relays KJ1-KJ6 are respectively connected with 3 electric ball valves of the 3 mining frequency converters, respectively supply power to the 3 electric ball valves and control the 3 electric ball valves.
Through the connection mode, the invention realizes the direct isolation of the mining frequency converter and the mobile substation, realizes that the mining frequency converter has a power frequency standby loop, and further realizes that when the frequency converter fails and needs to be overhauled or replaced, only the first disconnecting switch and the first 3 alternating current vacuum contactors KM1-KM3 of the invention can be disconnected, and only the power supply of the frequency converter is disconnected or the standby power frequency loop is switched (the KM1-KM3 is disconnected, the KM4-KM6 is connected and the second disconnecting switch is switched on), so that the normal production of a coal mine is not affected.
When the invention is independently applied to a pump house pumping station for controlling and protecting a water pump oil pump scene, as shown in fig. 2, 6 water pump oil pumps are directly connected to 6 vacuum alternating current contactors KM of the device, liquid level, oil level and oil temperature sensors (C1-C8 in fig. 2) of a water tank oil cylinder are connected to a comprehensive protector of the device, and setting of overrun threshold values of liquid level, oil level and oil temperature is carried out through a man-machine interaction interface of a display screen as shown in fig. 3, real-time values of the liquid level, the oil level and the oil temperature can be displayed in real time, and the device can carry out automatic protection control and real-time display on 4 oil temperatures, 3 oil levels and 1 liquid level. After the interface is set according to the actual requirements of the site, the automatic control of the oil temperature, the oil level and the liquid level is realized through the calculation of a software program in the PLC according to real-time numerical values, and when the set threshold value is reached, the corresponding alternating current contactor is automatically switched on or off. The over-limit display screen pops up a red alarm box to prompt over-limit alarm, as shown in fig. 4.
As described above, when the invention is used as a matching device of a mine frequency converter, effective actual isolation of the mine frequency converter and a mine mobile substation is realized, and the mine frequency converter is provided with a standby power frequency loop. The isolation of the mining frequency converter has the significance that when the mining frequency converter has serious faults and needs to cut off the power supply of the mining frequency converter, the power supply of the mining frequency converter with faults can be cut off only by cutting off the first 3 alternating current contactors and the first isolating switch, and other electrical equipment connected to the same mining movable transformer substation (one mining movable transformer substation is used as a power supply to drive and connect a plurality of electric equipment) is not influenced. The invention has the significance of realizing the standby power frequency loop for the mine frequency converter, and is characterized in that when the mine frequency converter fails and the mine is required to stop production, the first isolating switch and the first 3 alternating current contactors are disconnected, the second isolating switch and the last three alternating current contactors are switched on, so that the quick switching to the standby power frequency loop is realized, and the normal production of a coal mine is not influenced. The invention has wide market prospect, and has many successful cases as the use prospect of the mine frequency converter matching device, such as Henan Jiyuan coal mine No. one well and Shandong Jining Wen up Tang Yang coal mine, and the mine side is consistent and good.
When the invention is independently applied to a pump house pump station for controlling and protecting the scene of the water pump, one device can be used for replacing a plurality of old winch switches, thereby greatly reducing the occupied space and the construction quantity of wiring and greatly reducing the failure rate. The intelligent control device uses the inlet PLC as an intelligent control element, has high automation degree, can realize automatic control of the oil pump of the water pump so as to realize automatic control of the oil temperature, the oil level and the liquid level, and is automatically connected or automatically closed corresponding to the alternating current contactor when the set threshold value is reached. And the over-limit display screen pops up a red alarm frame to prompt over-limit alarm. The invention has wide market prospect, and has multiple successful cases such as Shenhuaining coal group, jiangsu Xu Kuang energy share limited company and the like as a scene of being independently applied to a pump house pump station for controlling and protecting a water pump, so that the invention has good favor of the mining party. The invention has wide market prospect and can bring considerable market benefit.
Furthermore, the invention also discloses a mining underground mobile substation, which comprises a box body, wherein the box body is divided into a high-voltage chamber, a low-voltage chamber, a transformation chamber and a control chamber through a partition board, the high-voltage chamber is internally provided with high-voltage equipment, the low-voltage chamber is internally provided with low-voltage equipment, the transformation chamber is internally provided with a transformer, the control chamber is internally provided with control equipment, and the partition board is provided with terminals and cable channels for installing, connecting and communicating all parts of equipment.
The high-voltage equipment comprises a high-voltage switch cabinet, a high-voltage vacuum switch is arranged in the high-voltage switch cabinet, the high-voltage vacuum switch is protected by a high-voltage switch protection controller, and the high-voltage switch is used for conducting circuit breaking operation through a mining high-voltage vacuum switch composite circuit breaker.
As shown in fig. 5, the high voltage switch protection controller includes: the system comprises a main control module, an IO module, a communication module, a temperature module, a current and voltage sensor pre-detection module, a permanent magnet circuit breaker control module, a display module and an intrinsic safety power module; the main control module is connected with the display module, the main control module is connected with the communication module through optical fibers, and the communication module is respectively connected with the temperature module, the IO module, the first permanent magnet breaker control module and the second permanent magnet breaker control module through optical fibers, and the current and voltage sensor is a pre-detection module.
The main control module comprises a local control, a communication interface and a display interface; the IO module comprises input and output of switching value and input and output of analog value; the communication module is provided with an RS485, RJ45 and FC optical fiber interface; the temperature module is provided with multiple paths of temperature detection; the current-voltage sensor pre-detection module comprises direct current resistance detection of a constant current source generator; the permanent magnet breaker control module comprises capacitance detection, switching-on and switching-off control and position feedback; the display module comprises a 7-inch color liquid crystal configuration display screen; the intrinsic safety power supply module (B6) comprises 24V 'ib' intrinsic safety type protection switching power supply.
Specifically, the main control module specifically comprises 3 paths of current acquisition interfaces, 1 path of zero sequence current interfaces and 1 path of system voltage interfaces; the main control module uses 16 keys in a display module powered by the intrinsic safety power supply module to simulate keyboard input, sets local parameters and module parameters, sets communication parameters, sets parameters of a temperature module, sets parameters of an IO module, sets current and voltage protection, sets parameters of the temperature module and sets parameters of a permanent magnet breaker module.
The IO interface included in the IO module is as follows: the switching-off switch B1-1, the switching-on switch B1-2, the backup switch B1-3, the short circuit test switch B1-4, the overload test switch B1-5, the ready-to-complete switch B1-6, the breaker fault switch B1-7, the current sensor fault switch B1-8, the voltage sensor fault switch B1-9, the overtemperature switch B1-10, the other fault switches B1-11, and the three controller current sampling switches B1-12, B1-13 and B1-14, wherein the B1-12, B1-13 and B1-14 adopt 4-20 mA analog current output, and the current sampling values of the controllers can be output in the form of analog quantity in proportion to provide data basis for the other controllers. The three external variable switches B1-15, B1-16 and B1-17 are also included, wherein the B1-15, B1-16 and B1-17 adopt 0-10V analog voltage input, and physical quantities such as water pressure, liquid level and air quantity introduced by an external transmitter can be output in the form of analog voltage.
The communication module is powered by the intrinsic safety power module and is connected between each module and the main control module through an optical fiber interface, and the communication module is connected with external upper computer equipment of the switch through RS485, RJ45 and FC optical fiber interfaces.
The temperature module comprises 8 independent temperature units, each temperature unit comprises a mutually independent temperature detection interface, 8 paths of temperatures are detected simultaneously through connection with the PT100, and an alarm threshold value of each path of temperature can be independently set through the main control module. Wherein due to the complex downhole environment and the precision problem of the temperature sensor, the temperature data collected by the temperature module often generate certain noise, and the cost of immediately alarming and stopping is too high for the situation. If it cannot be determined whether the noise is generated or the data acquisition is normal, the manual inspection mode is difficult and accidents are easy to cause in the underground environment. Thus, in order to solve the problem, the present invention processes the collected temperature data, specifically, processes the historical data collected by combining with the temperature module, including: the temperature module selects the temperature measurement of the current time and the temperature measurement data of 9 times continuously before to obtain 10 times of temperature data, and records the 10 times of temperature data as data T 0 To T 9 . For each data T i Dividing by the maximum value in the 10 times temperature data to normalize and obtain T' i Subsequent calculation of
Wherein->
Is T' i Is a mean arithmetic value of (c). When M is greater than 0.01, the temperature data is temporarily set as the first abnormality, and the arithmetic average value of the 9 previous temperature data is temporarily used as the current temperature measurement value to carry out the next operation. If no abnormality occurs in the next temperature measurement, continuing to measure the temperature according to a normal program; if 3 anomalies appear continuously, it is determined that the 3 temperature data are not noise, and the arithmetic average value before is replaced by the real temperature measurement value. And if the alarm threshold is reached, immediately alarming.
The intrinsic safety power supply module comprises six paths of 24V power supply output interfaces, and is used for supplying power to a main control module, an IO module communication module, a temperature module, a display module, a current and voltage sensor pre-detection module and a permanent magnet circuit breaker control module, wherein the intrinsic safety level is 'ib'.
When the current and voltage sensor pre-detection module is at a separated position in the front-mounted isolation of the system, the keyboard is used for operation, the main control module controls the current and voltage sensor pre-detection module to sequentially test loop resistance of a secondary side loop of the current and voltage sensor, a test result is compared with parameters set by the main control module, the result is prompted by the display module, and if the result exceeds the range, an audible and visual alarm is sent.
After the main system is started, the permanent magnet circuit breaker module detects the capacity of the position switch and the capacity of the capacitor, compares the set parameters, prompts locking or preparation to be completed, and can carry out a closing request of the main circuit, which is provided by the controller, after the preparation is completed.
The low-voltage indoor unit comprises a low-voltage power distribution cabinet, wherein the low-voltage power distribution cabinet comprises an incoming line input part, a sub-control part and an output part, the output part is provided with a starter and a frequency converter, and the frequency converter adopts a three-level four-quadrant frequency conversion machine core and is matched with the multifunctional power distribution device.
The above applications are only some of the embodiments of the present application. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the inventive concept.
Claims (6)
1. The utility model provides a take multi-functional distribution device of oil temperature oil level protection which characterized in that includes comprehensive protector, display screen, intermediate relay, contact relay, vacuum alternating current contactor, isolation phase change switch and explosion-proof shell based on PLC.
2. The multifunctional power distribution device with oil temperature and oil level protection according to claim 1, wherein the comprehensive protector is connected with a display screen, the PLC and the display screen are internally provided with software programs which are verified and optimized, and the display screen is provided with a human-computer interaction interface.
3. The multifunctional power distribution device with oil temperature and oil level protection according to claim 2, wherein the multifunctional power distribution device can be used as a matching of a mining frequency converter.
4. A multi-function power distribution apparatus with oil temperature and level protection as claimed in claim 3, wherein said multi-function power distribution apparatus can be used for controlling and protecting a water pump oil pump.
5. The multifunctional power distribution device with oil temperature and oil level protection according to claim 4, wherein the isolating switch is connected with an alternating current vacuum contactor, the alternating current vacuum contactor is connected with an intermediate relay, and the intermediate relay and the contact relay are respectively connected with the comprehensive protector; the comprehensive protector calculates and then controls the intermediate relay and the contact relay through a PLC program, and then the intermediate relay controls the vacuum alternating current contactor.
6. The multifunctional power distribution device with oil temperature and oil level protection according to claim 5, wherein the liquid level, oil level and oil temperature sensors of the water tank oil cylinder are connected to the comprehensive protector of the device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310075976.4A CN116054008A (en) | 2023-02-07 | 2023-02-07 | Multifunctional power distribution device with oil temperature and oil level protection function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310075976.4A CN116054008A (en) | 2023-02-07 | 2023-02-07 | Multifunctional power distribution device with oil temperature and oil level protection function |
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| CN116054008A true CN116054008A (en) | 2023-05-02 |
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| CN202310075976.4A Pending CN116054008A (en) | 2023-02-07 | 2023-02-07 | Multifunctional power distribution device with oil temperature and oil level protection function |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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