CN116243043A - Explosion-proof type voltage current transformer of motor side - Google Patents
Explosion-proof type voltage current transformer of motor side Download PDFInfo
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- CN116243043A CN116243043A CN202310076064.9A CN202310076064A CN116243043A CN 116243043 A CN116243043 A CN 116243043A CN 202310076064 A CN202310076064 A CN 202310076064A CN 116243043 A CN116243043 A CN 116243043A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/80—Arrangements in the sub-station, i.e. sensing device
- H04Q2209/82—Arrangements in the sub-station, i.e. sensing device where the sensing device takes the initiative of sending data
- H04Q2209/823—Arrangements in the sub-station, i.e. sensing device where the sensing device takes the initiative of sending data where the data is sent when the measured values exceed a threshold, e.g. sending an alarm
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Abstract
The invention discloses a motor side voltage-current transformer which comprises an anti-shell, a shunt, a power module, a main control unit and a photoelectric conversion device, wherein the shunt is connected in series in a power supply main loop of a motor, the shunt converts a current signal of the main loop into a voltage signal of 0-75mV, the voltage signal and a full-voltage signal of the main loop enter the main control unit through a connecting wire and are subjected to analog-to-digital conversion, digital signals after analog-to-digital conversion are respectively converted into an RS485 signal and a TCP/IP signal through different communication coding chips, the RS485 signal is led to a terminal of the main control unit, the TCP/IP signal is led to a communication network port of the main control unit, and the TCP/IP signal is connected with the photoelectric conversion device through a network cable and is converted into an optical signal for wire transmission. The invention can monitor the actual power consumption voltage and current of the motor in real time, effectively analyze the operation condition of the motor, reduce the potential safety hazard caused by power transmission detection in dangerous areas, and reduce the attenuation interference and equipment cost caused by wiring transmission.
Description
Technical Field
The invention relates to the technical field of electric explosion prevention, in particular to a motor side explosion-proof voltage and current transformer, a motor with the transformer and a mining underground transformer substation with the motor.
Background
The transformer is also called as an instrument transformer, and is a generic term of a current transformer and a voltage transformer. Can change high voltage into low voltage and large current into small current for measuring or protecting system. The function of the device is mainly to convert high voltage or large current into standard low voltage (100V) or standard small current (5A or 1A, respectively, nominal value) proportionally so as to realize standardization and miniaturization of measuring instruments, protecting equipment and automatic control equipment. Meanwhile, the mutual inductor can be used for separating a high-voltage system so as to ensure the safety of personnel and equipment. In order to ensure the normal operation of industrial equipment, it is necessary to provide real-time monitoring of voltage and current for each motor.
Currently, the voltage and current of the motor are monitored in real time, generally on the power supply side, i.e. in the starting loop of the device. However, in the field operation process of the equipment, particularly when the distance of the transmission line is relatively far, the problem of the transmission line is relatively prominent, more attenuation and interference often exist, and when the equipment fails, the need of accurately judging whether the failure point is on the motor or on the cable line is often encountered. In particular in the field of underground electrical equipment for mines, cable line faults often have larger potential safety hazards and are not easy to check. The fault points can be accurately distinguished, and time and material cost can be saved for users in the actual production process. If the transformer is directly installed at the power supply equipment side according to the traditional voltage and current sampling mode, the sampling line is too long and too high in cost, and the sampling error can be caused by the interference and attenuation of the sampling line.
Disclosure of Invention
In order to solve the technical problems, the invention provides the voltage-current transformer arranged at the motor side aiming at the defects of voltage-current sampling of the existing equipment, which can monitor the voltage and current in the actual operation of the motor in real time, transmit the monitored voltage and current signals in different communication modes such as RS485, network, optical fiber, wireless and the like, ensure the accuracy and timeliness of the monitored signals, distinguish the voltage and current at the motor side from the voltage and current at the starting side, provide guarantee for the normal operation of the equipment and provide basis for the fault analysis of the equipment.
The complete technical scheme of the invention comprises the following steps:
a motor-side explosion-proof voltage-current transformer, comprising: the explosion-proof housing 1, the current divider 2, the power module 3, the main control unit 4 and the photoelectric conversion device 5.
Further, the shunt 2 is connected in series in a power supply main loop of the motor, and a cable crimping part of the shunt 2 and the power supply main loop is connected with the power supply module 3 and supplies power to the power supply module 3.
Further, the dc output end of the power module 3 is connected to the main control unit 4 and the photoelectric conversion device 5, and the power module 3 supplies power to the main control unit 4 and the photoelectric conversion device 5.
Further, the current signal of the main loop is converted into a voltage signal of 0-75mV by the shunt 2, and the voltage signal and the full voltage signal of the main loop enter the main control unit 4 through a connection line and are subjected to analog-digital conversion.
Further, the digital signals after analog-to-digital conversion are respectively converted into an RS485 signal and a TCP/IP signal through different communication coding chips.
Further, the RS485 signal is led to a terminal of the main control unit 4, and the TCP/IP signal is led to a communication network port of the main control unit 4.
Further, the TCP/IP signal is connected to the photoelectric conversion device 5 through a network cable, and converts an electrical signal into an optical signal, and the optical signal is transmitted through the optical signal.
Further, the shunt 2, the power module 3, the main control unit 4, the photoelectric conversion device 5, and electrical and communication wires between the devices are all installed in the explosion-proof housing 1.
Further, the mining underground transformer substation with the explosion-proof voltage and current transformer comprises a high-voltage part, wherein 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 switch protection controller. The transformer substation further comprises a low-voltage power distribution cabinet, 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.
Compared with the prior art, the invention has the following beneficial effects:
1. the motor side explosion-proof voltage and current transformer can monitor the actual power consumption voltage and current of the motor in real time, effectively analyze the operation condition of the motor and ensure the normal operation of the motor; when faults occur, fault points are accurately distinguished, and potential safety hazards caused by power transmission detection in dangerous areas are reduced.
2. The invention transmits the voltage and current signals monitored in real time in a communication mode, reduces attenuation and interference caused by wiring transmission, and greatly reduces the material and labor cost caused by the traditional wiring mode.
3. The current transformer can be an explosion-proof device used alone, can also be used as an explosion-proof flange of an explosion-proof motor, and is matched with a junction box of the motor for use, so that the cost of the device is reduced, and the space required by the installation of the device is reduced.
Drawings
Fig. 1 is a schematic diagram of a motor side explosion-proof voltage-current transformer according to the present invention.
Fig. 2 is a schematic diagram of a mining underground substation high-voltage vacuum switch controller with the voltage-current transformer of the present invention.
Fig. 3 is a schematic diagram of a multifunctional distribution device of a mining underground substation with the voltage-current transformer of the invention.
In the figure: 1-an explosion-proof shell; 2-a shunt; a 3-power module; 4-a main control unit; 5-photoelectric conversion device.
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 invention discloses an explosion-proof voltage-current transformer at the motor side.
Fig. 1 is a schematic structural diagram of a motor-side explosion-proof voltage-current transformer, which includes: the explosion-proof housing 1, the current divider 2, the power module 3, the main control unit 4 and the photoelectric conversion device 5.
The shunt 2 is connected in series in a power supply main loop of the motor, a power supply of the power module 3 is taken from a cable crimping position of the main loop of the shunt 2, and the power supply of the main control unit 4 and the photoelectric conversion device 5 is taken from a direct current output end of the power module 3.
The current signal of the main loop is converted into a voltage signal of 0-75mV by the current divider 2, the voltage signal and the full-voltage signal of the main loop enter the main control unit 4 through a connecting wire, the full-voltage signal and the full-voltage signal are subjected to analog-digital conversion in the main control unit and are converted into digital signals, the digital signals are respectively converted into an RS485 signal and a TCP/IP signal by different communication coding chips, the RS485 signal is led to a terminal of the main control unit 4, the TCP/IP signal is led to a communication network port of the main control unit 4, the TCP/IP signal can be connected with the photoelectric conversion device 5 through a network cable, and the electric signals are converted into optical signal incoming lines for transmission.
Taking a transformer using an optical signal as an example, a rated current of a motor is 45A, an explosion-proof transformer with a rated current of 75A is installed at the motor side, the motor is overloaded in operation (the voltage is kept basically stable in the process) due to the increase of load, the actual operation current is stabilized at about 49.5A, the actual operation current passes through the shunt 2, the voltage signal converted from the current signal is 49.5mV, the voltage signal is directly connected into the central control unit 4, and in the central control unit, the signal is converted into a digital signal through an analog-digital conversion, and is converted into a communication signal through a coding chip, and then the signal is converted into an optical signal through the photoelectric conversion device 5 and is uploaded to a far end. After the optical signal is uploaded to the far end, the optical signal is converted back into a communication signal through the photoelectric converter, transmitted to the protection terminal, displays the actual running current 49.5A of the motor, and outputs a protection tripping signal when necessary. In the protection terminal, taking the current triggering inverse time limit overcurrent protection as an example, if the rated current of the motor set in the protection terminal is 45A and the inverse time limit overcurrent protection characteristic is 110% of the rated current for 1min to trigger tripping, the protection terminal sends a tripping signal after receiving the stable running current of the motor to be 49.5A and the running time exceeds 1min, and cuts off a power supply loop of the motor.
The shunt 2, the power module 3, the main control unit 4 and the photoelectric conversion device 5 are all installed in the explosion-proof housing 1, and the explosion-proof housing contains complete explosion-proof elements, meets the explosion-proof requirements of the actual site and obtains the credentials necessary for the production of the equipment, and comprises necessary matched components such as a housing, a flange, a glans head, a horn mouth, a rubber pad, an internal component mounting plate, an external housing mounting bracket, a fastening screw and the like.
The invention also discloses a mining underground transformer substation adopting the voltage-current transformer, 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 by 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.
The high-voltage switch protection controller is shown in fig. 2, and comprises: 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. The temperature data collected by the temperature module often generate certain noise due to the complex underground environment and the precision problem of the temperature sensor, 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 previous continuous times for the detection temperature of each path to obtain 10 times of temperature data in total to obtain data T 0 To T 9 . For each data T i Divided by the maximum of 10 temperature dataPerforming normalization treatment and obtaining 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 component structure of the high-voltage vacuum switch composite breaker is as follows: the permanent magnet circuit breaker comprises a control power supply installation chamber, a permanent magnet mechanism installation chamber, a mechanical circuit breaker mechanism and a permanent magnet circuit breaker mechanism, wherein the mechanical circuit breaker mechanism is positioned in the mechanical mechanism installation chamber, and the permanent magnet circuit breaker mechanism is positioned in the permanent magnet mechanism installation chamber.
The permanent magnet switch controller is arranged in the control power supply installation chamber and controls the permanent magnet breaking mechanism to operate, and the permanent magnet breaking mechanism adopts a mode of combining a tripping permanent magnet mechanism with mechanical hand tripping.
The low-voltage indoor low-voltage power distribution cabinet comprises a wire inlet input part, a sub-control part and an output part, wherein 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 a multifunctional power distribution device. And a voltage and current transformer is arranged on motor equipment connected with the transformer substation.
The multifunctional power distribution device with the oil temperature and oil level protection is shown in fig. 3, and 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;
the isolated phase change switch is connected with an alternating current vacuum contactor set KM, the alternating current vacuum contactor set KM is connected with an intermediate relay set KA, and the intermediate relay set KA and a 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.
The vacuum alternating-current contactor group KM comprises a first vacuum alternating-current contactor KM1, a second vacuum alternating-current contactor KM2, a third vacuum alternating-current contactor KM3, a fourth vacuum alternating-current contactor KM4, a fifth vacuum alternating-current contactor KM5 and a sixth vacuum alternating-current contactor KM6.
The contact relay group KJ comprises 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.
The intermediate relay group KA comprises 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.
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.
The comprehensive protector is connected with a display screen, the PLC and the display screen are internally provided with software programs subjected to verification and optimization, and the display screen is provided with a man-machine interaction interface;
the multifunctional power distribution device can be used as a matching of a mining frequency converter, wherein a first alternating current vacuum contactor KM1 is connected with a fourth alternating current vacuum contactor KM4 in parallel, a second alternating current vacuum contactor KM2 is connected with a fifth alternating current vacuum contactor KM5 in parallel, and a third alternating current vacuum contactor KM3 is connected with a 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 3 motors M1-M3 as power frequency standby loops of the mining frequency converter, and the explosion-proof voltage-current transformer can be arranged on the motor side. 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.
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,
the device comprises a water tank oil cylinder, wherein 8 sensors including 4 oil temperatures, 3 oil levels and 1 liquid level are connected to a comprehensive protector, the comprehensive protector is connected to the device, 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 the overrun occurs, a red alarm frame is popped up by the display screen to prompt overrun alarm.
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 (8)
1. An explosion-proof voltage current transformer of motor side, characterized by comprising: the anti-explosion device comprises an anti-explosion shell (1), a shunt (2), a power module (3), a main control unit (4) and a photoelectric conversion device (5).
2. A motor-side explosion-proof voltage-current transformer according to claim 1, characterized in that the shunt (2) is connected in series in the main power supply circuit of the motor, and the cable crimping of the shunt (2) and the main power supply circuit is connected with the power supply module (3) and supplies power to the power supply module (3).
3. The explosion-proof voltage-current transformer of claim 2, wherein the direct current output end of the power module (3) is connected with the main control unit (4) and the photoelectric conversion device (5), and the power module (3) supplies power to the main control unit (4) and the photoelectric conversion device (5).
4. A motor-side explosion-proof voltage-current transformer according to claim 3, characterized in that the current divider (2) converts the current signal of the main circuit into a voltage signal of 0-75mV, and the voltage signal and the full voltage signal of the main circuit enter the main control unit (4) through a connection line and are subjected to analog-digital conversion.
5. The explosion-proof voltage-current transformer of claim 4, wherein the digital signals after analog-to-digital conversion are converted into RS485 signals and TCP/IP signals through different communication coding chips, respectively.
6. The explosion-proof voltage-current transformer of claim 5, wherein the RS485 signal is led to a terminal of the main control unit (4), and the TCP/IP signal is led to a communication network port of the main control unit (4).
7. The explosion-proof voltage-current transformer of the motor side according to claim 6, wherein the TCP/IP signal is connected to the photoelectric conversion device (5) through a network cable, and converts the electrical signal into an optical signal, and the optical signal is transmitted through the optical signal.
8. The explosion-proof voltage-current transformer of claim 6, wherein the shunt (2), the power module (3), the main control unit (4) and the photoelectric conversion device (5), and the electrical and communication connection between the devices are all installed in the explosion-proof housing (1).
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| CN202310076064.9A CN116243043A (en) | 2023-02-07 | 2023-02-07 | Explosion-proof type voltage current transformer of motor side |
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| CN202310076064.9A CN116243043A (en) | 2023-02-07 | 2023-02-07 | Explosion-proof type voltage current transformer of motor side |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102646955A (en) * | 2012-04-28 | 2012-08-22 | 山西科泰电气有限公司 | Comprehensive protecting device for coal mine power center |
| CN102928641A (en) * | 2012-10-31 | 2013-02-13 | 南京江北自动化技术有限公司 | Electronic current transformer |
| CN205069351U (en) * | 2015-09-16 | 2016-03-02 | 天津市凯源新能电气有限公司 | Mutual -inductor with explosion -proof function |
| CN207148198U (en) * | 2017-08-15 | 2018-03-27 | 山东联合电力技术有限公司 | A kind of electronic current mutual inductor based on current divider principle |
| CN207410019U (en) * | 2017-11-03 | 2018-05-25 | 山东联合电力技术有限公司 | A kind of power distribution network distribution differential protective system |
| CN216649229U (en) * | 2022-01-24 | 2022-05-31 | 山西研控智能科技有限公司 | Phase difference type comprehensive protector for coal mine motor |
| CN217563334U (en) * | 2022-05-24 | 2022-10-11 | 电光防爆科技（上海）有限公司 | Reactive compensation low-voltage protection box for mining explosion-proof mobile substation |
-
2023
- 2023-02-07 CN CN202310076064.9A patent/CN116243043A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102646955A (en) * | 2012-04-28 | 2012-08-22 | 山西科泰电气有限公司 | Comprehensive protecting device for coal mine power center |
| CN102928641A (en) * | 2012-10-31 | 2013-02-13 | 南京江北自动化技术有限公司 | Electronic current transformer |
| CN205069351U (en) * | 2015-09-16 | 2016-03-02 | 天津市凯源新能电气有限公司 | Mutual -inductor with explosion -proof function |
| CN207148198U (en) * | 2017-08-15 | 2018-03-27 | 山东联合电力技术有限公司 | A kind of electronic current mutual inductor based on current divider principle |
| CN207410019U (en) * | 2017-11-03 | 2018-05-25 | 山东联合电力技术有限公司 | A kind of power distribution network distribution differential protective system |
| CN216649229U (en) * | 2022-01-24 | 2022-05-31 | 山西研控智能科技有限公司 | Phase difference type comprehensive protector for coal mine motor |
| CN217563334U (en) * | 2022-05-24 | 2022-10-11 | 电光防爆科技（上海）有限公司 | Reactive compensation low-voltage protection box for mining explosion-proof mobile substation |
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