CN114899033A - Miniaturized degree of depth once and twice fuses circuit breaker on post - Google Patents
Miniaturized degree of depth once and twice fuses circuit breaker on post Download PDFInfo
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- CN114899033A CN114899033A CN202210523554.4A CN202210523554A CN114899033A CN 114899033 A CN114899033 A CN 114899033A CN 202210523554 A CN202210523554 A CN 202210523554A CN 114899033 A CN114899033 A CN 114899033A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/027—Integrated apparatus for measuring current or voltage
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/6606—Terminal arrangements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/662—Housings or protective screens
- H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/16—Indicators for switching condition, e.g. "on" or "off"
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/16—Indicators for switching condition, e.g. "on" or "off"
- H01H9/168—Indicators for switching condition, e.g. "on" or "off" making use of an electromagnetic wave communication
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/662—Housings or protective screens
- H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
- H01H2033/66223—Details relating to the sealing of vacuum switch housings
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The embodiment of the invention discloses a miniaturized deep primary and secondary fusion pole-mounted circuit breaker, which comprises a pole-mounted circuit breaker switch body, a low-power-consumption intelligent feeder terminal and a primary and secondary connecting cable, wherein the pole-mounted circuit breaker switch body is connected with a power supply; the pole-mounted breaker switch body is connected with the low-power-consumption intelligent feeder terminal through the primary connecting cable and the secondary connecting cable; the pole-mounted circuit breaker switch body adopts a three-phase discrete support type and comprises a deep primary and secondary fusion solid-sealed pole, a switch box body and a magnetic control operating mechanism; each switch box body supports each primary and secondary fusion embedded pole with the depth; each magnetic control operating mechanism is arranged in each switch box body and connected to the corresponding deep primary-secondary fusion solid-sealed pole. The invention has complete functions, reliable performance, small volume, light weight and convenient daily production and field installation.
Description
Technical Field
The invention relates to the technical field of circuit breakers, in particular to a miniaturized depth primary and secondary fusion pole-mounted circuit breaker.
Background
In recent years, with the advance of the primary and secondary fusion technology, the usage amount of the primary and secondary fusion switch device is increasing. At present, the conventional complete switch equipment is mostly adopted by the overhead line switch equipment of the power distribution network in China, namely, the modes of a column switch (a load switch or a breaker) + a Feeder Terminal (FTU) + an electromagnetic voltage transformer (PT), and the conventional complete switch equipment has a plurality of problems in the actual operation process, such as mismatching of primary equipment interfaces and secondary equipment interfaces, and poor compatibility, interchangeability and expansibility; the operating mechanism is rusted and jammed due to the equipment condensation; equipment damage caused by secondary short circuit of the voltage transformer and secondary open circuit of the current transformer; the short-circuit fault needs to be reclosed for many times to isolate the fault; the line loss calculation cannot be supported, etc.
The current complete set of switch equipment in China mainly adopts the following three forms:
(1) the traditional primary and secondary complete switch equipment consists of switch equipment with an electromagnetic current transformer arranged inside, a feeder terminal and an electromagnetic voltage transformer. The electromagnetic current transformer of the equipment is easy to saturate, and the measurement error is large; the electromagnetic voltage transformer has large volume, heavy weight and high failure rate; the voltage transformer cannot completely acquire three-phase voltage data; the switchgear assembly is relatively bulky.
(2) And the secondary fusion equipment consists of switch equipment fused with a current sensor and a voltage sensor, a feeder terminal, an electromagnetic voltage transformer or a capacitive energy-taking device. The equipment is not completely fused, the electromagnetic voltage transformer is not completely replaced by the capacitor energy-taking device with better performance, and the electromagnetic voltage transformer and the capacitor energy-taking device are both required to be independently installed outside the switch equipment, so that the volume of the complete set of switch equipment is increased.
(3) The deep primary and secondary fusion equipment consists of a switch device fused with a current sensor, a voltage sensor and a capacitance type energy-taking device and a low-power-consumption feeder terminal. The equipment has reached the technical requirement of depth one-time and two-time fusion, but the switch equipment fused with the capacitive energy-taking device has larger volume, on one hand, the diameter and the height of a solid-sealed polar pole are larger, so that the solid-sealed polar pole has larger volume, on the other hand, the larger switch phase distance (340mm) causes larger overall volume, and the large volume inevitably brings large weight, so that much inconvenience is brought to the daily production and field installation of the switch equipment.
Disclosure of Invention
The invention aims to provide a miniaturized deep primary-secondary fusion pole-mounted circuit breaker which is used for solving at least one technical problem, has complete functions and reliable performance, is small in size and light in weight, and is convenient for daily production and field installation.
The embodiment of the invention is realized by the following steps:
a miniaturized degree of depth one secondary fuses circuit breaker on post, includes circuit breaker switch body 1, low-power consumption intelligent feeder terminal 3 and one secondary connecting cable 2 on the post.
The pole-mounted circuit breaker switch body 1 is connected with the low-power-consumption intelligent feeder terminal 3 through the secondary connecting cable 2.
The pole-mounted circuit breaker switch body 1 adopts a three-phase discrete support type and comprises a deep primary-secondary fusion solid-sealed pole 101, a switch box body 102 and a magnetic control operating mechanism 103.
Each switch box body 102 supports each of the primary and secondary fusion embedded poles 101 with the depth.
Each magnetic control operating mechanism 103 is respectively arranged in each switch box body 102 and connected to the corresponding primary and secondary fusion embedded pole 101 with the depth.
In a preferred embodiment of the present invention, the deep one-time and two-time fusion embedded pole 101 of the miniaturized deep one-time and two-time fusion pole-mounted circuit breaker is poured with an outdoor epoxy resin.
An outlet side current sensor ECT, an inlet side voltage sensor EVT1, an outlet side voltage sensor EVT2, an inlet side energy-taking high-voltage capacitor, an outlet side energy-taking high-voltage capacitor and a circuit breaker vacuum arc extinguish chamber are poured inside the depth primary and secondary fusion solid-sealed polar pole 101.
The top end of the deep primary and secondary fusion solid-sealed polar pole 101 is an incoming line side, and the horizontal end is an outgoing line side.
The technical effects are as follows: the deep primary and secondary fusion solid-sealed pole 101 is a core component of the pole-mounted circuit breaker switch body 1, bears rated current and short-time fault current, switches on and off the rated current and the specified fault current, collects current and voltage signals, and obtains energy from a power grid.
In a preferred embodiment of the present invention, the switch box 102 of the miniaturized deep-second fusion pole-top circuit breaker is integrally formed by a stamping process.
The switch box body 102 is provided with a connecting socket, and is connected with the low-power-consumption intelligent feeder terminal 3 through the primary and secondary connecting cable 2.
The technical effects are as follows: the switch box body 102 is of an integrated die punch forming structure, welding points are reduced, aluminum alloy can be used for casting, integrity is better, and weight can be reduced; the supporting depth is first and second times fused with the solid-sealed polar pole 101, and all transmission parts are sealed in the box body, so that the influence of the outdoor environment is avoided.
In the preferred embodiment of the present invention, the base of the switch box 102 of the miniaturized depth primary-secondary fused pole-mounted circuit breaker is sealed with a cover plate and a sealing ring.
The technical effects are as follows: ensuring no moisture to enter.
In a preferred embodiment of the present invention, each of the magnetic control operating mechanisms 103 of the miniaturized depth-first-second fusion pole-mounted circuit breaker is connected to a moving contact of a vacuum arc-extinguishing chamber of each of the depth-first-second fusion pole-mounted terminals 101 through an insulating pull rod, so as to perform linear switching on and off movements.
And the insulating pull rod is connected with a manual brake separating device.
The technical effects are as follows: the transmission is simple, the switching-on and switching-off speed is high, the switching-on is not more than 20ms, and the switching-off is not more than 10 ms. When the manual brake opening is needed, the brake opening handle is pulled downwards, and the switch can open the brake.
In the preferred embodiment of the present invention, one end of the primary and secondary connecting cable 2 of the miniaturized depth primary and secondary fused pole upper circuit breaker is a plug, and the other end is divided into a signal line 201 and a control line 202.
The plug adopts a 90-degree steering plug.
The plug is made of aluminum alloy.
The signal line 201 and the control line 202 at the other end are respectively connected with two sockets of the low-power intelligent feeder terminal 3.
In a preferred embodiment of the present invention, the signal line 201 of the miniaturized depth primary-secondary fused pole-mounted circuit breaker adopts a shielded cable for transmitting current-voltage signals and switch position signals.
The control line 202 is used for switching on and off control and power supply control.
In a preferred embodiment of the present invention, the low power consumption intelligent feeder terminal 3 of the miniaturized depth primary-secondary fusion pole-mounted circuit breaker is provided with:
and the power supply module is used for processing the alternating current transmitted by the pole-mounted circuit breaker switch body 1 and converting the alternating current into the direct current available for the low-power-consumption intelligent feeder terminal 3.
The power module can be simultaneously connected with two paths of independent alternating current, and can normally work after being connected with any path of alternating current; the power module is also provided with a loop which is connected with the storage battery and utilizes the storage battery to supply power or charge the storage battery.
And the signal processing module is used for processing the switch state quantity in real time, judging whether a line has a fault or not and judging the fault type, and ensuring the accurate action of protection.
And the control module is used for sending an action command to the pole-mounted breaker switch body 1 to control the switch to be switched on or switched off.
And the line loss module is used for measuring forward active and reactive electric energy, reverse active and reactive electric energy, measuring four-quadrant reactive electric energy, and measuring, recording and displaying voltage, current, power and power factor in real time.
And the communication module is used for optical fiber or wireless communication, uploading the switching state quantity in real time, uploading line state data such as line voltage, current, power, electric quantity and the like in real time, and receiving the control command issued by the master station in real time.
And the human-computer interaction module is used for setting a protection fixed value, switching a remote/local state, performing on-site combination and separation operation and setting the opening and closing of the outlet pressing plate.
The technical effects are as follows: the low-power-consumption intelligent feeder terminal 3 has the functions of short-circuit fault, local line selection of single-phase earth fault, section positioning, fault isolation and non-fault section power restoration; the minimum fault area is automatically isolated through a level difference mode, and normal power supply is carried out in a non-fault area; the fault isolation and the non-fault section power restoration can be realized on the spot without depending on a main station through control logics such as voltage-loss brake opening, brake pressing, brake closing starting protection and the like.
The low-power-consumption intelligent feeder terminal 3 has an automatic reclosing function.
The low-power consumption intelligent feeder terminal 3 has the functions of remote measurement, remote signaling, remote control and remote regulation.
The low-power-consumption intelligent feeder terminal 3 has a bidirectional electric quantity acquisition function and a real-time quantity measurement function, can realize automatic acquisition and uploading of line loss data, and meets the technical requirements of line loss management.
In a preferred embodiment of the present invention, a backup battery module is further disposed in the low-power consumption intelligent feeder terminal 3 of the miniaturized deep primary-secondary fusion column circuit breaker, and is configured to float and charge stored energy when the low-power consumption intelligent feeder terminal 3 is in normal operation, and provide electric energy to enable the low-power consumption intelligent feeder terminal 3 to continue to operate when the low-power consumption intelligent feeder terminal 3 does not have external alternating current.
In a preferred embodiment of the present invention, the low-power-consumption intelligent feeder terminal 3 of the miniaturized depth primary-secondary fusion pole-mounted circuit breaker adopts a hood-type structure.
The embodiment of the invention has the beneficial effects that:
according to the miniaturized depth primary and secondary fusion pole-mounted circuit breaker, the switch body of the pole-mounted circuit breaker is complete in function, current sampling, voltage sampling at two sides and energy taking at two sides are achieved; the pole-mounted circuit breaker switch body is small in size, light in weight and suitable for manual carrying operation and assembly operation in a factory; the low-power consumption intelligent feeder terminal has small volume, low power consumption, complete functions of control, protection, measurement, metering, communication and the like; the switch body operating mechanism has high switching-on and switching-off speed and low power consumption; the pole-mounted breaker switch body is small in size, light in weight, easy to move and mount; the whole group of action time is not more than 50ms, and level difference protection is set suitably; the miniaturized degree of depth once and twice fuses circuit breaker on post only has circuit breaker switch body and low-power consumption intelligent feeder terminal on the post, connects with the cable, and the installation is simple.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic view of the overall structure of a miniaturized depth primary and secondary fusion pole-mounted circuit breaker according to the present invention;
FIG. 2 is a schematic view of a pole top breaker switch body configuration for a miniaturized depth primary and secondary fusion pole top breaker of the present invention;
FIG. 3 is a schematic diagram of a side view of an on-pole circuit breaker switch body of the miniaturized depth first and second fusion on-pole circuit breaker of the present invention;
fig. 4 is a schematic view of the working principle of the miniaturized depth primary and secondary fusion pole-mounted circuit breaker of the present invention.
In the figure: 1-a pole-mounted circuit breaker switch body; 101-depth primary and secondary fusion solid-sealed polar pole; 102-a switch box body; 103-a magnetic control operating mechanism; 2-a secondary connecting cable; 201-signal lines; 202-control line; 3-low power consumption intelligent feeder terminal.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein can be arranged and designed in a wide variety of different configurations.
Referring to fig. 1 to 3, a first embodiment of the present invention provides a miniaturized deep-depth one-secondary-fusion pole-top circuit breaker, which includes a pole-top circuit breaker switch body 1, a low-power-consumption intelligent feeder terminal 3, and a secondary connection cable 2.
The pole-mounted circuit breaker switch body 1 is connected with the low-power-consumption intelligent feeder terminal 3 through the secondary connecting cable 2.
The pole-mounted circuit breaker switch body 1 is of a three-phase discrete support type and comprises a deep primary-secondary fusion solid-sealed pole 101, a switch box body 102 and a magnetic control operating mechanism 103.
Each switch box body 102 supports each of the primary and secondary fusion embedded poles 101 with the depth.
Each magnetic control operating mechanism 103 is respectively arranged in each switch box body 102 and connected to the corresponding primary and secondary fusion embedded pole 101 with the depth.
In a preferred embodiment of the present invention, the deep one-time and two-time fusion embedded pole 101 of the miniaturized deep one-time and two-time fusion pole-mounted circuit breaker is poured with an outdoor epoxy resin.
An outlet side current sensor ECT, an inlet side voltage sensor EVT1, an outlet side voltage sensor EVT2, an inlet side energy-taking high-voltage capacitor, an outlet side energy-taking high-voltage capacitor and a circuit breaker vacuum arc extinguish chamber are poured inside the depth primary and secondary fusion solid-sealed polar pole 101.
The top end of the depth primary and secondary fusion solid-sealed polar pole 101 is an incoming line side, and the horizontal end is an outgoing line side.
The technical effects are as follows: the deep primary and secondary fusion solid-sealed pole 101 is a core component of the pole-mounted circuit breaker switch body 1, bears rated current and short-time fault current, switches on and off the rated current and the specified fault current, collects current and voltage signals, and obtains energy from a power grid.
In a preferred embodiment of the present invention, the switch box 102 of the miniaturized deep-second fusion pole-top circuit breaker is integrally formed by a stamping process.
The switch box body 102 is provided with a connecting socket, and is connected with the low-power-consumption intelligent feeder terminal 3 through the primary and secondary connecting cable 2.
The technical effects are as follows: the switch box body 102 is of an integrated die punch forming structure, welding points are reduced, aluminum alloy can be used for casting, integrity is better, and weight can be reduced; the supporting depth is first and second times fused with the solid-sealed polar pole 101, and all transmission parts are sealed in the box body, so that the influence of the outdoor environment is avoided.
In the preferred embodiment of the present invention, the base of the switch box 102 of the miniaturized depth primary-secondary fused pole-mounted circuit breaker is sealed with a cover plate and a sealing ring.
The technical effects are as follows: ensuring no moisture to enter.
In a preferred embodiment of the present invention, each of the magnetic control operating mechanisms 103 of the miniaturized depth-first-second fusion pole-mounted circuit breaker is connected to a moving contact of a vacuum arc-extinguishing chamber of each of the depth-first-second fusion pole-mounted terminals 101 through an insulating pull rod, so as to perform linear switching on and off movements.
And the insulating pull rod is connected with a manual brake separating device.
The technical effects are as follows: the transmission is simple, the switching-on and switching-off speed is high, the switching-on is not more than 20ms, and the switching-off is not more than 10 ms. When the manual brake opening is needed, the brake opening handle is pulled downwards, and the switch can open the brake.
In the preferred embodiment of the present invention, one end of the primary and secondary connecting cable 2 of the miniaturized depth primary and secondary fused pole upper circuit breaker is a plug, and the other end is divided into a signal line 201 and a control line 202.
The plug adopts a 90-degree steering plug.
The plug is made of aluminum alloy.
The signal line 201 and the control line 202 at the other end are respectively connected with two sockets of the low-power intelligent feeder terminal 3.
In a preferred embodiment of the present invention, the signal line 201 of the miniaturized depth primary-secondary fused pole-mounted circuit breaker adopts a shielded cable for transmitting current-voltage signals and switch position signals.
The control line 202 is used for switching on and off control and power supply control.
In a preferred embodiment of the present invention, the low power consumption intelligent feeder terminal 3 of the miniaturized depth primary-secondary fusion pole-mounted circuit breaker is provided with:
and the power supply module is used for processing the alternating current transmitted by the pole-mounted circuit breaker switch body 1 and converting the alternating current into the direct current available for the low-power-consumption intelligent feeder terminal 3.
The power module can be simultaneously connected with two paths of independent alternating current, and can normally work after being connected with any path of alternating current; the power module is also provided with a loop which is connected with the storage battery and utilizes the storage battery to supply power or charge the storage battery.
And the signal processing module is used for processing the switch state quantity in real time, judging whether a line has a fault or not and judging the fault type, and ensuring the accurate action of protection.
And the control module is used for sending an action command to the pole-mounted breaker switch body 1 to control the switch to be switched on or switched off.
And the line loss module is used for measuring forward active and reactive electric energy, reverse active and reactive electric energy, measuring four-quadrant reactive electric energy, and measuring, recording and displaying voltage, current, power and power factor in real time.
And the communication module is used for optical fiber or wireless communication, uploading line state data such as switching state quantity, line voltage, current, power, electric quantity and the like in real time, and receiving a control command issued by the master station in real time.
And the human-computer interaction module is used for setting a protection fixed value, switching a remote/local state, performing on-site combination and separation operation and setting the opening and closing of the outlet pressing plate.
The technical effects are as follows: the low-power-consumption intelligent feeder terminal 3 has the functions of short-circuit fault, local line selection of single-phase earth fault, section positioning, fault isolation and non-fault section power restoration; the minimum fault area is automatically isolated through a level difference mode, and normal power supply is carried out in a non-fault area; the fault isolation and the non-fault section power restoration can be realized on the spot without depending on a main station through control logics such as voltage-loss brake opening, brake pressing, brake closing starting protection and the like.
The low-power-consumption intelligent feeder terminal 3 has an automatic reclosing function.
The low-power consumption intelligent feeder terminal 3 has the functions of remote measurement, remote signaling, remote control and remote regulation.
The low-power-consumption intelligent feeder terminal 3 has a bidirectional electric quantity acquisition function and a real-time quantity measurement function, can realize automatic acquisition and uploading of line loss data, and meets the technical requirements of line loss management.
In a preferred embodiment of the present invention, a backup battery module is further disposed in the low-power consumption intelligent feeder terminal 3 of the miniaturized deep primary-secondary fusion column circuit breaker, and is configured to float and charge stored energy when the low-power consumption intelligent feeder terminal 3 is in normal operation, and provide electric energy to enable the low-power consumption intelligent feeder terminal 3 to continue to operate when the low-power consumption intelligent feeder terminal 3 does not have external alternating current.
In a preferred embodiment of the present invention, the low-power-consumption intelligent feeder terminal 3 of the miniaturized depth primary-secondary fusion pole-mounted circuit breaker adopts a hood-type structure.
Referring to fig. 4, a second embodiment of the present invention provides a working principle of a miniaturized deep-second fused pole-top circuit breaker, which includes:
the energy taking 1 and the energy taking 2 are respectively an incoming line side energy taking device and an outgoing line side energy taking device, independent work is not affected, each side can take 15W (VA) of electricity for the low-power-consumption feeder terminal, the energy taking devices on the two sides are mutually standby, and the normal work of the feeder terminal can be guaranteed by the electricity on any one of a power supply side and a load side. The first EVT and the second EVT operate on the power source side and the load side, respectively, and the sampling current sensor ECT operates on the load side. When the CB circuit breaker is in a switching-off state, a feeder terminal FTU simultaneously reads voltage signals of a power supply side and a load side, judges the magnitude and phase relation of voltages at two sides and provides a basis for switching-on or reclosing of the CB circuit breaker; when the CB circuit breaker is in a closing state, the sampling current sensor ECT monitors current data in real time, voltage data sent by the sampling voltage sensor EVT are combined, a feeder line terminal can calculate three-phase power and line loss in real time, meanwhile, whether a line has a fault or not is judged, and when the CB circuit breaker has the fault, the CB circuit breaker is controlled to be opened in time, and the fault is isolated.
When the device normally works at a user boundary, a line branch or a line branch section, if the CB load side has a fault (short circuit or grounding), the load side ECT can detect a current abnormal signal, the first EVT at the power supply side and the second EVT at the load side can both detect a voltage abnormal signal, the feeder terminal FTU can carry out logic judgment after receiving the current and voltage abnormal signal, and finally a trip command can be output to the CB operating mechanism to trip the CB and remove the fault; if the CB power source side has a fault (short circuit or ground), the load side ECT does not detect the current abnormality signal, the FTU does not start the protection, and the CB does not operate.
When the device normally works at a ring network connection part, if power supplies on two sides of the CB participate in power supply, the CB is generally in a brake-off state, no current flows through the switch body at the moment, but the voltages of lines on two sides are normal, both the first energy-taking device on the power supply side and the second energy-taking device on the load side can normally work as FTUs to provide working power supplies, the first EVT on the power supply side and the second EVT on the load side both normally work to acquire voltage signals and send the voltage signals to the FTUs, and the FTUs sense that the lines on the incoming line side and the outgoing line side of the CB have normal voltages and can lock a brake-on output to enable the CB not to be switched on, so that the loop closing operation of the lines is avoided; if power supply needs to be switched after a certain section of circuit on the load side is in fault, the FTU can still normally work through a power supply provided by a first energy-taking device on the power supply side, at the moment, a second EVT on the load side sends a signal that the voltage of the circuit is zero to the FTU, meanwhile, an ECT on the load side sends a signal that the current of the circuit is zero to the FTU, the FTU comprehensively judges and unlocks a switch-on output, and at the moment, the CB switch-on can recover the power supply of the circuit on the load side; if power supply needs to be reversely rotated to supply power after a certain section of circuit on the power supply side is in fault, the FTU can still normally work through the power supply provided by the second energy-taking device on the load side, at the moment, the first EVT on the power supply side sends a signal that the line voltage is zero to the FTU, meanwhile, the ECT on the load side sends a signal that the line current is zero to the FTU, the FTU comprehensively judges and unlocks the switching-on output, and at the moment, the CB switching-on can recover the power supply of the circuit on the power supply side.
When the equipment works at the network source boundary, the CB power supply side is connected with the distributed power supply, the load side is connected with the power distribution network, the CB bears the grid connection and disconnection functions of the distributed power supply, and the FTU obtains electric energy through the first energy obtaining device at the power supply side or the second energy obtaining device at the load side to normally work. When the distributed power supply needs to be connected with a power distribution network in a grid mode, the matching problem of voltage amplitude and phases needs to be considered, the CB power supply side and the load side are both provided with sampling voltage sensors (EVT), voltage data can be monitored in real time, when the voltage data on the two sides meet the matching requirement, the FTU can send a switch-on command, and the CB can be switched on to enable the distributed power supply to be connected with the grid to operate.
The embodiment of the invention aims to protect a miniaturized depth primary and secondary fusion pole-mounted circuit breaker, which has the following effects:
1. the size of each pole-mounted breaker switch body is as follows: about 585mm in height, about 866mm in width, about 395mm in depth, and 280mm apart.
2. The embedded deep first-second fusion solid-sealed pole is internally provided with a current sensor (ECT), a double-side voltage sensor (EVT) and a double-side capacitance energy-taking device.
3. The operating mechanism is a monostable magnetic control operating mechanism, a permanent magnet is not arranged in the operating mechanism, when the operating mechanism is switched on, the coil drives the movable iron core to switch on and magnetize the mechanism, and after the mechanism is switched on, the magnetic force is used for keeping the switch on; when the brake is opened, the coil demagnetizes the mechanism, the brake is opened by the brake opening spring, the mechanism has no magnetism after the brake is opened, the demagnetization temperature of the mechanism is higher than 300 ℃, the brake opening and closing speed is high, the power consumption is low, and the stability and the reliability are realized.
4. The operating mechanism and the vacuum arc extinguish chamber of the circuit breaker are of a direct connection type structure, the switching on and switching off are operated in a direct-acting mode, transmission is simple, and loss of mechanism output power is greatly reduced.
5. The magnetic control operating mechanism is provided with a mechanical manual brake separating device, when the manual brake separating is needed, the brake separating handle is pulled downwards, and the switch can separate the brake.
6. All transmission parts of the pole-mounted breaker switch body are sealed in the switch box body and are not affected by the external environment.
7. The pole-mounted circuit breaker switch body and the low-power-consumption intelligent feeder terminal are connected in a cable type aerial plug mode and are of a one-to-two structure.
8. The low-power consumption intelligent feeder terminal is of a cover type structure, small in size, internally provided with a lithium battery and free of a battery box.
9. The low-power-consumption intelligent feeder terminal has the functions of short-circuit fault, local line selection of single-phase earth fault, section positioning, fault isolation and non-fault section power restoration.
10. The low-power consumption intelligent feeder terminal realizes automatic isolation of a minimum fault area through a level difference mode, and normal power supply is carried out in a non-fault area.
11. The low-power consumption intelligent feeder terminal can realize fault isolation and non-fault section power restoration independent of a main station on the spot through control logics such as no-voltage brake opening, brake pressing, brake closing starting protection and the like.
12. The low-power consumption intelligent feeder terminal has a bidirectional electric quantity acquisition function and a real-time measurement function, can realize automatic acquisition and uploading of line loss data, and meets the technical requirements of line loss management.
13. The low-power consumption intelligent feeder terminal has an automatic reclosing function.
14. The low-power consumption intelligent feeder line terminal has the functions of remote measurement, remote signaling, remote control and remote regulation.
15. The miniaturized depth primary and secondary fusion on-column circuit breaker is applicable to user demarcation positions, line branch positions, network source demarcation positions, looped network connection positions and the like.
16. The miniaturized depth primary and secondary fusion pole-mounted circuit breaker has complete functions and reliable performance, and most importantly, the miniaturized depth primary and secondary fusion pole-mounted circuit breaker is small in size, light in weight and convenient to produce daily and install on site.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (10)
1. A miniaturized depth primary and secondary fusion pole-mounted circuit breaker is characterized by comprising a pole-mounted circuit breaker switch body (1), a low-power-consumption intelligent feeder terminal (3) and a secondary connecting cable (2);
the pole-mounted circuit breaker switch body (1) is connected with the low-power-consumption intelligent feeder terminal (3) through the primary and secondary connecting cable (2);
the pole-mounted breaker switch body (1) adopts a three-phase discrete support type and comprises a deep primary and secondary fusion solid-sealed pole (101), a switch box body (102) and a magnetic control operating mechanism (103);
each switch box body (102) supports each primary and secondary fusion embedded pole (101) with the depth;
each magnetic control operating mechanism (103) is arranged in each switch box body (102) and connected to the corresponding deep primary-secondary fusion solid-sealed pole (101).
2. The miniaturized depth once-and-twice-fused pole-top circuit breaker of claim 1,
the deep primary and secondary fusion solid-sealed polar pole (101) is poured by adopting outdoor epoxy resin;
an outgoing line side current sensor, an incoming line side voltage sensor, an outgoing line side voltage sensor, an incoming line side energy-taking high-voltage capacitor, an outgoing line side energy-taking high-voltage capacitor and a breaker vacuum arc extinguish chamber are poured inside the deep primary and secondary fusion solid-sealed polar pole (101);
the top end of the deep primary and secondary fusion solid-sealed polar pole (101) is an incoming line side, and the horizontal end of the deep primary and secondary fusion solid-sealed polar pole is an outgoing line side.
3. The miniaturized depth once-and-twice-fused pole-top circuit breaker of claim 1,
the switch box body (102) is integrally formed by adopting a stamping process;
the switch box body (102) is provided with a connecting socket, and the low-power-consumption intelligent feeder terminal (3) is connected through the primary and secondary connecting cable (2).
4. The miniaturized deep secondary fusion pole top circuit breaker of claim 3,
the base of the switch box body (102) is sealed by a cover plate and a sealing ring.
5. The miniaturized depth once-and-twice-fused pole-top circuit breaker of claim 1,
each magnetic control operating mechanism (103) is connected with a moving contact of a vacuum arc extinguish chamber of each deep primary and secondary fusion solid-sealed pole column (101) through an insulating pull rod respectively to perform switching-on and switching-off linear motion;
and the insulating pull rod is connected with a manual brake separating device.
6. The miniaturized depth once-and-twice-fused pole-top circuit breaker of claim 1,
one end of the primary and secondary connecting cable (2) is a plug, and the other end of the primary and secondary connecting cable is divided into a signal line (201) and a control line (202);
the plug adopts a 90-degree steering plug;
the signal line (201) and the control line (202) at the other end are respectively connected with two sockets of the low-power-consumption intelligent feeder terminal (3).
7. The miniaturized deep secondary fusion pole top circuit breaker of claim 6,
the signal wire (201) adopts a shielding type cable and is used for transmitting a current voltage signal and a switch position signal;
and the control line (202) is used for switching on and off control and power supply control.
8. The miniaturized deep primary and secondary fusion pole-mounted circuit breaker according to claim 1, characterized in that the low-power consumption intelligent feeder terminal (3) is internally provided with:
the power supply module is used for processing the alternating current transmitted by the pole-mounted circuit breaker switch body (1) and converting the alternating current into the direct current available for the low-power-consumption intelligent feeder terminal (3);
the signal processing module is used for processing the switch state quantity in real time, judging whether a line has a fault or not and judging the type of the fault so as to ensure the accurate action of protection;
the control module is used for sending an action command to the pole-mounted breaker switch body (1) and controlling the switch to be switched on or switched off;
the line loss module is used for measuring forward active and reactive electric energy, reverse active and reactive electric energy, measuring four-quadrant reactive electric energy, and measuring, recording and displaying voltage, current, power and power factor in real time;
the communication module is used for optical fiber or wireless communication, uploading line state data such as switching state quantity, line voltage, current, power, electric quantity and the like in real time, and receiving a control command issued by the master station in real time;
and the human-computer interaction module is used for setting a protection fixed value, switching a remote/local state, performing on-site combination and separation operation and setting the opening and closing of the outlet pressing plate.
9. The miniaturized deep primary-secondary fusion pole-mounted circuit breaker according to claim 8, wherein a backup battery module is further disposed in the low-power consumption intelligent feeder terminal (3) and is used for floating and charging stored energy when the low-power consumption intelligent feeder terminal (3) is normally operated, and when the low-power consumption intelligent feeder terminal (3) does not have external alternating current, the power is provided to enable the low-power consumption intelligent feeder terminal (3) to continue to operate.
10. The miniaturized deep once-and-twice fused pole-mounted circuit breaker according to claim 1, wherein the low power consumption intelligent feeder terminal (3) adopts a hood type structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210523554.4A CN114899033A (en) | 2022-05-13 | 2022-05-13 | Miniaturized degree of depth once and twice fuses circuit breaker on post |
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| CN202210523554.4A CN114899033A (en) | 2022-05-13 | 2022-05-13 | Miniaturized degree of depth once and twice fuses circuit breaker on post |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116500328A (en) * | 2023-06-06 | 2023-07-28 | 无锡市锡山湖光电器有限公司 | High-precision three-phase current sensor |
| CN116908615A (en) * | 2023-07-19 | 2023-10-20 | 贵州金百瑞能源环保科技有限公司 | Distributed line selection equipment |
-
2022
- 2022-05-13 CN CN202210523554.4A patent/CN114899033A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116500328A (en) * | 2023-06-06 | 2023-07-28 | 无锡市锡山湖光电器有限公司 | High-precision three-phase current sensor |
| CN116908615A (en) * | 2023-07-19 | 2023-10-20 | 贵州金百瑞能源环保科技有限公司 | Distributed line selection equipment |
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