CN209896443U - Mobile intelligent distribution box for oil field high-voltage motor - Google Patents
Mobile intelligent distribution box for oil field high-voltage motor Download PDFInfo
- Publication number
- CN209896443U CN209896443U CN201920577554.6U CN201920577554U CN209896443U CN 209896443 U CN209896443 U CN 209896443U CN 201920577554 U CN201920577554 U CN 201920577554U CN 209896443 U CN209896443 U CN 209896443U
- Authority
- CN
- China
- Prior art keywords
- power supply
- power
- phase
- operation screen
- distribution box
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The utility model relates to the technical field of power supply special for high-voltage motor in oil field mobile working vehicle, in particular to a mobile intelligent distribution box for oil field high-voltage motor with reliable structure and power state parameter on-line display, which comprises an intelligent control device and a touch control operation screen, wherein the intelligent control device comprises a three-phase voltage mutual inductor, a power inlet main switch, a three-phase current mutual inductor, an air contactor, an insulation resistance tester, a power transformer and a central control unit, and also comprises an external insulation resistance tester, the power transformer provides power supply for the central control unit and the touch screen, and provides operation control power supply for the power inlet main switch and two air contactors, thus realizing the insulation monitoring of the oil field high-voltage power supply, the on-line control of the positive and negative rotation of the motor, leakage current protection, the coordination of overcurrent quick-break protection and timing limit protection, the coordination of air contactor front protection and the back-, a high-reliability special power distribution box is provided.
Description
Technical Field
The invention relates to the technical field of power supplies special for high-voltage motors in oil field mobile working vehicles, in particular to a mobile intelligent distribution box for the high-voltage motors in the oil fields, which has a reliable structure and can realize automatic monitoring of power circuit insulation, automatic forward and reverse control of the motors, leakage current protection, over-current quick-break protection and timing limit protection coordination, air contactor front protection and main switch backup protection coordination and on-line display of power state parameters.
Background
The special power supply for the high-voltage motor in the existing oil field mobile working vehicle generally adopts a control switch on site to control operation, the motor in a deep well operation area is not subjected to power insulation monitoring, leakage current and overcurrent protection, the motor steering needs to be changed by manual reverse line in the forward and reverse operation of the motor, and when the current exceeds a value, the control switch acts slowly or the difference of the setting current is large, so that override tripping is caused, a superior power circuit breaker is jacked, and the power station or the power supply point connected with the power station has large-area power failure.
Disclosure of Invention
The utility model aims to overcome the not enough of existence among the prior art and provide a simple structure, dependable performance's oil field high voltage motor is with removing intelligent power distribution box.
The technical scheme of the utility model is realized like this:
a movable intelligent distribution box for an oil field high-voltage motor comprises an outer box body and an inner box body, wherein the outer box body comprises a box body shell, a handle on the side wall of the box body shell, and a single-opening door hinged with the shell, a grounding bolt is arranged at the bottom of the box body shell, the single-opening door comprises an upper door plate and a lower door plate which are independent, the two door plates are respectively connected with the box body shell through a door lock, a window is arranged on the upper door plate of the single-opening door, the box body corresponding to the upper door plate and the lower door plate is divided into an upper box body and a lower box body which are independent, a three-phase power supply incoming line connecting terminal and a three-phase power supply outgoing line connecting terminal are arranged in the lower box body, a distribution box main body is arranged in the upper box body, the distribution box main body comprises an intelligent control device arranged in the distribution, the intelligent control device comprises a three-phase voltage transformer, a power supply inlet wire main switch, a three-phase current transformer, two air contactors in parallel connection, an insulation resistance tester, a power supply transformer and a central control unit; the central control unit comprises a programmable controller CPU inserted in the slot, a switching value I/O output input interface, an analog-to-digital A/D converter and a controller network communication interface; the touch control operation screen comprises touch panel keys, an operation screen CPU and an operation screen network communication interface and is used for generating a visual control interface; the power transformer provides a power supply for the central control unit and the touch screen and provides an operation control power supply for the power inlet main switch and the two air contactors;
the power incoming line is connected to the outside of the three-phase power incoming line wiring terminal, the inside of the three-phase power incoming line wiring terminal is connected with the primary side of a three-phase voltage transformer in parallel, the inside of the three-phase power incoming line wiring terminal is connected with the upper port of a power incoming line main switch in series, the lower port of the power incoming line main switch is connected with the incoming line port of a three-phase current transformer in series, the primary outlet end of the three-phase current transformer is connected with the inlet line terminals of the upper ports of two parallel air contactors in series, the inside of one of the two air contactors is connected according to the method that the outlet is in a positive sequence A, B, C phase, the, B. and in the phase A connection method, outlet connection wires of the two air contactors are connected in parallel to an outlet wiring terminal of the distribution box and serve as a power box outlet wiring terminal of an aboveground high-voltage motor loop connected to an oil field.
The central control unit reads data transmitted by an operation screen network communication interface of the touch control operation screen, a serial communication interface of the intelligent electric energy meter and a network port of the insulation resistance tester through the controller network communication interface respectively, accesses a power supply incoming line main switch and an auxiliary switching value normally open contact of the air contactor through a switching value I/O input interface, and controls tripping and closing of the power supply incoming line main switch and the air contactor through closing or opening of a switching value I/O output interface contact.
The three-phase voltage transformer and the three-phase current transformer respectively convert power supply incoming line voltage and total supply current into 0-5V alternating voltage signals and respectively send the signals to an incoming line interface of the intelligent electric energy meter and a wiring interface of an analog-digital A/D converter of the central control unit.
The insulation resistance tester is an independent measuring instrument, and a measuring probe of the insulation resistance tester is connected to a three-phase power supply outgoing line wiring terminal so as to check the circuit and the insulation resistance value of a line connected to the circuit; when the insulation resistance value of the cable is reduced to 100K omega, the alarm information shows' insulation secondary alarm
100K omega, when the insulation resistance value of the cable is reduced to 30K omega, the alarm information shows' insulation first-level alarm
30K omega ", when alarming occurs, a real-time alarm picture can be automatically popped up in a main picture of the touch control operation screen, alarm time, current value and alarm description are displayed, and a red light flickers at the upper right corner of an alarm information button.
The output null nodes of the I/O input/output interface of the switching value are respectively connected with a power supply inlet wire main switch and the closed and open loops of the two air contactors to control the switch action, and the A/D interfaces of the digital-to-analog A/D converter are respectively connected with secondary voltage signals of a three-phase voltage transformer and a three-phase current transformer, and the secondary voltage signals are converted into digital values and then are sent to a CPU for calculation.
The touch panel of the touch control operation screen transmits the key information to the CPU of the operation screen for calculation and analysis, then communicates with the central control unit through the network communication interface of the operation screen, and confirms to receive or send the information again.
The touch control operation screen displays an operation wiring diagram of equipment in the intelligent distribution box, a main switch, the on-off state of the air contactor, the electric operation parameter of a control loop and insulation resistance monitoring and alarming on a screen surface, and simultaneously performs current quick-break protection, current timing limit protection fixed value setting, protection pressing plate switching and historical data query on the main switch of a power supply and the air contactor through touch keyboard operation.
The intelligent electric energy meter detects the three-phase voltage, three-phase current, active power, reactive power, apparent power, power factors and total electric energy consumption of the power supply control circuit in real time, and transmits the information to the panel of the touch control operation screen for display.
The utility model has the advantages that: the special high-voltage power supply distribution box realizes the coordination of insulation monitoring, forward and reverse rotation online control of the motor, leakage current protection, overcurrent quick-break protection and timing limit protection, and circuit breaker front protection and main switch backup protection of the special high-voltage power supply for the oil field, and provides the special power supply distribution box with high reliability.
Drawings
Fig. 1 is a schematic view of the external structure of the present invention.
Fig. 2 is a schematic diagram of the internal structure of the present invention.
Fig. 3 is a schematic diagram of the connection of the programmable controller according to the present invention.
Fig. 4 is the wiring schematic diagram of the intelligent electric energy meter of the utility model.
Fig. 5 is a schematic wiring diagram of the air contactor of the present invention.
Fig. 6 is a schematic diagram of the connection of the insulation resistance tester of the present invention.
Fig. 7 is a system diagram of the present invention.
Detailed Description
As shown in fig. 1 to 7, a mobile intelligent distribution box for an oil field high voltage motor comprises an outer layer box body and an inner layer box body, wherein the outer layer box body comprises a box body shell 1, a handle 2 on the side wall of the box body shell, and a single-opening door hinged with the box body shell, a grounding bolt is fixedly connected to the bottom of the box body shell 1, the single-opening door comprises an upper door plate and a lower door plate which are independent, the two door plates are respectively connected with the box body shell 1 through a door lock, a window 5 is arranged on the upper door plate 3 of the single-opening door, the box body corresponding to the upper door plate and the lower door plate is divided into an upper layer box body and a lower layer box body which are independent, a three-phase power supply incoming line connecting terminal 6 and a three-phase power supply outgoing line connecting terminal 7 are arranged in the lower layer box body, the upper layer box body, the front panel of block terminal and the articulated structure that singly opens the door that forms of block terminal main part, touch control operation screen 8 corresponding with the position of window 5 of outer box, intelligent electric energy meter 9 is located the below of touch control operation screen, the intelligent control device include a three-phase voltage transformer 10, a power inlet wire master switch 11, a three-phase current transformer 12, two parallelly connected air contactor 13, an insulation resistance tester 14, a power transformer 15 and a central control unit 16. The power transformer 15 provides power for the central control unit and the touch control operation screen, and provides operation control power for the power inlet main switch and the two air contactors.
The power incoming line is connected with the outside of a three-phase power incoming line connecting terminal 6, the inside of the three-phase power incoming line connecting terminal 6 is connected with the primary side of a three-phase voltage transformer 10 in parallel, the inside of the three-phase power incoming line connecting terminal 6 is connected with the upper port of a power incoming line main switch 11 in series, the lower port of the power incoming line main switch 11 is connected with the incoming line of a three-phase current transformer 12 in series, the primary outgoing line end of the three-phase current transformer 12 is connected with the incoming line terminals of the upper ports of two parallel air contactors 13 in series, the inside of one of the two air contactors 13 is connected according to the outlet with the positive sequence A, B, C phase, the other, B. and in the phase A connection method, the outlet connection wires of the two air contactors 13 are connected in parallel to a three-phase power supply outlet wiring terminal 7 of the distribution box and serve as a power box outlet wiring terminal of an aboveground high-voltage motor loop connected to an oil field.
Two air contactor 13 carry out machinery and electric interlocking through normally open normally closed contact, the procedure only allows to close a floodgate one in all time series, the procedure is acquiescent to set up at first to start positive sequence control circuit breaker, it is normal if the motor phase sequence, the motor forward rotation, then do not adjust, if the phase sequence is reverse, the motor reversal, then jump off positive sequence control circuit breaker, treat that the motor speed stops the back and close reverse rotation control circuit breaker, make the motor reach the forward rotation, no matter the wiring phase sequence of motor control circuit is how, the deciliter state of two circuit breakers of accessible control guarantees the motor forward rotation, change when avoiding actual motor reversal connects the wiring.
The three-phase voltage transformer 10 and the three-phase current transformer 12 respectively convert the power supply incoming line voltage and the total supply current into 0-5V alternating voltage signals which are respectively sent to an incoming line interface of the intelligent electric energy meter 9 and a wiring interface of an analog-digital A/D converter of the central control unit 16.
The central control unit 16 includes a programmable controller CPU plugged in the slot, a switching value I/O input/output interface, an analog-to-digital a/D converter, and a controller network communication interface. The central control unit 16 reads in data transmitted by the operation screen network communication interface of the touch control operation screen 8, the serial communication interface of the intelligent electric energy meter 9 and the network port of the insulation resistance tester 14 through the controller network communication interface respectively, accesses the power supply inlet wire main switch 11 and the auxiliary switching value normally open contact of the air contactor 13 through the switching value I/O input interface, and controls tripping and closing of the power supply inlet wire main switch 11 and the air contactor 13 through closing or opening of the switching value I/O output port contact.
The output null nodes of the I/O output-input interface of the switching value are respectively connected with a power supply inlet wire main switch 11 and the closed and open loops of two air contactors 13 to control the switch action, and the A/D interfaces of the digital-to-analog A/D converter are respectively connected with secondary voltage signals of a three-phase voltage transformer 10 and a three-phase current transformer 12, and the secondary voltage signals are converted into digital values and then sent to a CPU for calculation.
The central control unit 16 detects the voltage and current of the power supply from the three-phase voltage transformer 10 and the three-phase current transformer 12, detects the closing and opening of the main switch 11 and the two air contactors 13 through the switching value, and carries out the following quick protection program judgment when the detected effective value of the current of the power supply loop is suddenly increased or the position of the switch is changed:
1) when the calculated running current exceeds a given quick-break current protection fixed value of the air contactor, the central control unit immediately sends a tripping name to trip off the air contactor to form instantaneous quick-break overcurrent protection;
2) when the calculated running current exceeds a given time limit current quick-break protection fixed value of the air contactor and the fault current duration exceeds a set time limit value, the central control unit immediately sends a tripping name to trip off the air contactor to form the air contactor time limit overcurrent protection;
3) when the calculated running current exceeds a current quick-break protection fixed value given by a main switch, the central control unit immediately sends a tripping name to trip off the main switch of the power supply to form the quick-break current protection of the main switch of the power supply;
4) when the calculated running current exceeds a given time limit current quick-break protection fixed value of a main switch and the fault current duration exceeds a set time limit value, the central control unit immediately sends a tripping name to trip off the main switch of the power supply to form the time limit current protection of the main switch of the power supply;
5) the current fixed value of the power main switch timing limit overcurrent protection is larger than the fixed value of the air contactor current protection, and the time fixed value is higher than the time fixed value of the air contactor timing limit overcurrent protection and is used as the backup protection of the air contactor protection;
6) and when the detected leakage current of the power supply loop is larger than the current fixed value and the duration time exceeds the set time, the running air contactor is tripped off, and the leakage current protection is finished.
The intelligent electric energy meter 9 detects the three-phase voltage, three-phase current, active power, reactive power, apparent power, power factor and total electric energy consumption of the power supply control loop in real time, and transmits the information to the panel of the touch control operation screen 9 for display.
The touch control operation screen 8 comprises a touch panel key, an operation screen CPU and an operation screen network communication interface and is used for generating a visual control interface, the touch panel of the touch control operation screen 9 transmits key information to the operation screen CPU for calculation and analysis, then the key information is communicated with the central control unit through the operation screen network communication interface, and the receiving or sending of the information is confirmed again; the touch control operation screen 9 displays an operation wiring diagram of equipment in the intelligent distribution box, a main switch, the on-off state of the air contactor, the electric operation parameter of a control loop and insulation resistance monitoring and alarming on a screen surface, and simultaneously carries out current quick-break protection of the main switch of a power supply and the air contactor, setting of a current timing limit protection fixed value, switching on and off of a protection pressing plate and query of historical data through touch keyboard operation.
The insulation resistance tester 14 is an external independent measuring instrument, and a measuring probe of the insulation resistance tester 14 is connected to a three-phase power supply outgoing line wiring terminal so as to check the circuit and the insulation resistance value of a line connected to the circuit; when the insulation resistance value of the cable is reduced to 100K omega, the alarm information shows' insulation secondary alarm
100K omega, when the insulation resistance value of the cable is reduced to 30K omega, the alarm information shows' insulation first-level alarm
30K omega ", when alarming occurs, a real-time alarm picture can be automatically popped up in a main picture of the touch control operation screen, alarm time, current value and alarm description are displayed, and a red light flickers at the upper right corner of an alarm information button.
The control method of the distribution box comprises the following steps:
step one), program initialization
The method comprises the steps of setting storage addresses of sampling data of a power supply voltage and a power supply branch current A/D conversion circuit, calculating an effective value data storage address, setting communication addresses and protocols of a central control unit, an intelligent electric energy meter and an insulation resistance tester, setting data of two air contactor electric quantity locking units, setting a power supply branch current protection constant value area, and setting a constant value on line.
Step two), insulation resistance on-line monitoring
And starting a monitoring function of the insulation resistance tester, monitoring the insulation state on line, continuing the next step if the insulation resistance is good, and sending an over-value signal and giving an alarm if the insulation resistance is over-value, and locking a closing loop.
Step three) voltage running state monitoring and main switch control
Reading the monitoring and measuring data of the three-phase voltage transformer, calculating whether the effective value of the incoming line voltage is qualified or not, judging whether the incoming line voltage is overvoltage or low voltage, allowing a main loop switch to be closed when the incoming line voltage is normal, and locking a closing loop when the incoming line voltage is abnormal.
Step four), switching on the power supply loop air contactor and one-key phase-changing operation
When the program detects that the voltage is normal, the main circuit switch is in a closing state, and after a starting command sent by the touch control operation screen is received, the central control unit starts the air contactor with the default wiring being in a positive sequence to be closed, after closing, the program reads the starting current of the motor and manually checks the problem of reverse rotation of the motor, if the reverse rotation is found, a phase change operation button is immediately pressed, and the program enters a phase change automatic operation state.
Step five), power supply current calculation and protection
When the air contactor is switched on, the central control unit automatically detects current, performs leakage current, quick-break overcurrent protection and timing-limit overcurrent protection judgment, performs corresponding current protection when an over-value is found and a protection criterion is met, trips the air contactor, and simultaneously starts power supply inlet main switch protection if the air contactor fails, and then judges whether the power supply inlet main switch protection condition is met, if the tripping of the power supply inlet main switch is met, so that the quick-break and timing-limit coordination, preposition and backup protection coordination of a power supply loop are realized.
Step six), data storage and recording
After the tasks of the steps are completed, the program stores the sequence recording data of all events, including time, voltage, current, switch action state and switch position information, and refreshes the switch position, current and accident state information data on the display screen according to the real-time information, thereby achieving the purpose of real-time display and update.
Claims (8)
1. The utility model provides an oil field high voltage motor is with removing intelligent distribution box, includes outer box and inlayer box, its characterized in that: the outer box body comprises a box body shell, a handle on the side wall of the box body shell and a single-opening door hinged with the box body shell, wherein the bottom of the box body shell is provided with a grounding bolt, the single-opening door comprises an upper door plate and a lower door plate which are independent, the two independent door plates are respectively connected with the box body shell through door locks, a window is arranged on the upper door plate of the single-opening door, the box body corresponding to the upper door plate and the lower door plate is divided into an upper layer box body and a lower layer box body which are independent, a three-phase power supply incoming line connecting terminal and a three-phase power supply outgoing line connecting terminal are arranged in the lower layer box body, the upper layer box body is internally provided with a distribution box main body, the distribution box main body comprises an intelligent control device arranged in the distribution box main body, and a touch control operation screen and an intelligent electric energy meter, the intelligent electric energy meter is positioned below the touch control operation screen, and the intelligent control device comprises a three-phase voltage transformer, a power supply incoming line main switch, a three-phase current transformer, two air contactors in parallel connection, a power supply transformer and a central control unit; the central control unit comprises a programmable controller CPU inserted in the slot, a switching value I/O output input interface, an analog-to-digital A/D converter and a controller network communication interface; the touch control operation screen comprises touch panel keys, an operation screen CPU and an operation screen network communication interface and is used for generating a visual control interface; the power transformer provides a power supply for the central control unit and the touch control operation screen and provides an operation control power supply for the power inlet main switch and the two air contactors; the intelligent control device also comprises an external insulation resistance tester;
the power incoming line is connected to the outside of the three-phase power incoming line wiring terminal, the inside of the three-phase power incoming line wiring terminal is connected with the primary side of a three-phase voltage transformer in parallel, the inside of the three-phase power incoming line wiring terminal is connected with the upper port of a power incoming line main switch in series, the lower port of the power incoming line main switch is connected with the incoming line port of a three-phase current transformer in series, the primary outlet end of the three-phase current transformer is connected with the inlet line terminals of the upper ports of two parallel air contactors in series, the inside of one of the two air contactors is connected according to the method that the outlet is in a positive sequence A, B, C phase, the, B. and in the phase A connection method, the outlet wiring of the two air contactors is connected in parallel to a three-phase power supply outlet wiring terminal of the distribution box and is used as a power box outlet wiring terminal of an aboveground high-voltage motor loop connected to an oil field.
2. The mobile intelligent distribution box for the oilfield high-voltage motor according to claim 1, wherein: the central control unit reads data transmitted by an operation screen network communication interface of the touch control operation screen, a serial communication interface of the intelligent electric energy meter and a network port of the insulation resistance tester through the controller network communication interface respectively, accesses a power supply incoming line main switch and an auxiliary switching value normally open contact of the air contactor through a switching value I/O input interface, and controls tripping and closing of the power supply incoming line main switch and the air contactor through closing or opening of a switching value I/O output interface contact.
3. The mobile intelligent distribution box for the oilfield high-voltage motor according to claim 1, wherein: the three-phase voltage transformer and the three-phase current transformer respectively convert power supply incoming line voltage and total supply current into 0-5V alternating voltage signals and respectively send the signals to an incoming line interface of the intelligent electric energy meter and a wiring interface of an analog-digital A/D converter of the central control unit.
4. The mobile intelligent distribution box for the oilfield high-voltage motor according to claim 1, wherein: the insulation resistance tester is an independent measuring instrument, and a measuring probe of the insulation resistance tester is connected to a three-phase power supply outgoing line wiring terminal so as to check the circuit and the insulation resistance value of a line connected to the circuit; when the insulation resistance value of the cable is reduced to 100K omega, the alarm information shows' insulation secondary alarm100K omega, when the insulation resistance value of the cable is reduced to 30K omega, the alarm information shows' insulation first-level alarm
30K omega ", when alarming occurs, a real-time alarm picture can be automatically popped up in a main picture of the touch control operation screen, alarm time, current value and alarm description are displayed, and a red light flickers at the upper right corner of an alarm information button.
5. The mobile intelligent distribution box for the oilfield high-voltage motor according to claim 1, wherein: the output null nodes of the I/O input/output interface of the switching value are respectively connected with a power supply inlet wire main switch and the closed and open loops of the two air contactors to control the switch action, and the A/D interfaces of the digital-to-analog A/D converter are respectively connected with secondary voltage signals of a three-phase voltage transformer and a three-phase current transformer, and the secondary voltage signals are converted into digital values and then are sent to a CPU for calculation.
6. The mobile intelligent distribution box for the oilfield high-voltage motor according to claim 1, wherein: the touch panel of the touch control operation screen transmits the key information to the CPU of the operation screen for calculation and analysis, then communicates with the central control unit through the network communication interface of the operation screen, and confirms to receive or send the information again.
7. The mobile intelligent distribution box for the oilfield high-voltage motor according to claim 1, wherein: the touch control operation screen displays an operation wiring diagram of equipment in the intelligent distribution box, a main switch, the on-off state of the air contactor, the electric operation parameter of a control loop and insulation resistance monitoring and alarming on a screen surface, and simultaneously performs current quick-break protection, current timing limit protection fixed value setting, protection pressing plate switching and historical data query on the main switch of a power supply and the air contactor through touch keyboard operation.
8. The mobile intelligent distribution box for the oilfield high-voltage motor according to claim 1, wherein: the intelligent electric energy meter detects the three-phase voltage, three-phase current, active power, reactive power, apparent power, power factors and total electric energy consumption of the power supply control circuit in real time, and transmits the information to the panel of the touch control operation screen for display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920577554.6U CN209896443U (en) | 2019-04-25 | 2019-04-25 | Mobile intelligent distribution box for oil field high-voltage motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920577554.6U CN209896443U (en) | 2019-04-25 | 2019-04-25 | Mobile intelligent distribution box for oil field high-voltage motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209896443U true CN209896443U (en) | 2020-01-03 |
Family
ID=69019904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920577554.6U Active CN209896443U (en) | 2019-04-25 | 2019-04-25 | Mobile intelligent distribution box for oil field high-voltage motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209896443U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112564103A (en) * | 2020-12-10 | 2021-03-26 | 西安航天动力研究所 | Outdoor portable power supply and distribution equipment of target field emission |
-
2019
- 2019-04-25 CN CN201920577554.6U patent/CN209896443U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112564103A (en) * | 2020-12-10 | 2021-03-26 | 西安航天动力研究所 | Outdoor portable power supply and distribution equipment of target field emission |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2020083396A1 (en) | Commutation type automatic adjusting device for three-phase current imbalance | |
| CN106199341B (en) | Fault line identification method and device under single-phase fault grounding working condition | |
| CN102830255A (en) | Smart electricity meter with function of monitoring and protecting power failure | |
| CN208478943U (en) | A kind of remote control intelligent household distribution box | |
| CN201893540U (en) | Intelligent radio network dispatching digital-type boundary controller complete equipment | |
| CN111146755A (en) | Feeder terminal and line protection device | |
| CN115498774B (en) | Microcomputer type distribution automation station terminal based on multi-line measurement and control | |
| CN110620434A (en) | Block terminal based on intelligent monitoring | |
| CN211859281U (en) | Portable low pressure intelligence fast switch-on power supply box | |
| CN204465005U (en) | A kind of capacitance compensation device for low-voltage networks based on GPRS communication | |
| CN209896443U (en) | Mobile intelligent distribution box for oil field high-voltage motor | |
| CN102148495B (en) | Single-phase earth fault self-healing device and system | |
| CN203037795U (en) | Small current grounding line selection system based on CAN network | |
| CN2867561Y (en) | Mine flame-proof vacuum feed switch | |
| CN114441896B (en) | Distribution network automatic simulation platform and FTU detection method | |
| CN207518284U (en) | A kind of accident disconnection device of small power incorporating into power network | |
| CN113595250B (en) | Automatic analysis method and system for abnormal opening and closing positions of GIS busbar disconnecting link | |
| CN205984829U (en) | Continuously adjustable three -phase breaker with function recloses | |
| CN210016327U (en) | Monitoring device and monitoring system for automatic switch of distributed power distribution network | |
| CN212008841U (en) | Fault on-line monitoring system of circuit breaker | |
| CN115986695A (en) | Comprehensive feeder automation terminal based on characteristic quantity self-recognition fusion level difference protection | |
| CN209982078U (en) | Multifunctional integrated power distribution device | |
| An et al. | Development of a smart low voltage circuit breaker with integrated protection and control functions based on wireless communications | |
| CN202059150U (en) | Earth leakage protective device suitable for setting address | |
| CN206117170U (en) | Mix apotype low pressure intelligent combination formula power capacitor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |