CN116165418A - Integrated plug-in voltage sensor and circuit breaker for 10kV pole-mounted circuit breaker - Google Patents
Integrated plug-in voltage sensor and circuit breaker for 10kV pole-mounted circuit breaker Download PDFInfo
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- CN116165418A CN116165418A CN202310191252.6A CN202310191252A CN116165418A CN 116165418 A CN116165418 A CN 116165418A CN 202310191252 A CN202310191252 A CN 202310191252A CN 116165418 A CN116165418 A CN 116165418A
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- circuit breaker
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- insulating cylinder
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- 239000003990 capacitor Substances 0.000 claims description 22
- 238000002955 isolation Methods 0.000 claims description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- 238000005266 casting Methods 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 238000000465 moulding Methods 0.000 claims description 8
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 4
- 239000004677 Nylon Substances 0.000 claims description 4
- 230000000712 assembly Effects 0.000 claims description 4
- 238000000429 assembly Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 229920001778 nylon Polymers 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims 2
- 238000009434 installation Methods 0.000 abstract description 6
- 230000005350 ferromagnetic resonance Effects 0.000 abstract description 4
- 239000011162 core material Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000012212 insulator Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000000819 phase cycle Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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Classifications
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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
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
-
- 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
-
- 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
- G01R15/04—Voltage dividers
-
- 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
-
- 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
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
-
- 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
-
- 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
- H01H9/02—Bases, casings, or covers
- H01H9/0271—Bases, casings, or covers structurally combining a switch and an electronic component
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
The invention belongs to a voltage sensor, and provides an integrated plug-in voltage sensor and a circuit breaker for a 10kV pole-mounted circuit breaker, which aim to solve the technical problems that an electromagnetic voltage transformer used for the current 10kV pole-mounted circuit breaker is large in occupied space and high in ferromagnetic resonance accident hidden trouble, so that the application cost of the circuit breaker is increased and the installation is inconvenient.
Description
Technical Field
The invention belongs to a voltage sensor, and particularly relates to an integrated plug-in voltage sensor and a circuit breaker for a 10kV pole-mounted circuit breaker.
Background
At present, a voltage transformer used by a 10kV pole-mounted circuit breaker of a power distribution network is mainly an electromagnetic voltage transformer, but the traditional electromagnetic voltage transformer has the problems of large occupied space, high hidden danger of ferromagnetic resonance accidents and the like. In practical application, space on the power supply line post is very limited, in order to install electromagnetic voltage transformer, makes the installation space of circuit breaker on the post compressed, often need change the space structural design of circuit breaker and just can install, has increased more use cost and has caused the installation inconvenient. In particular, in some multi-circuit bus-bar supply lines, electromagnetic voltage transformers cannot be installed due to limited space.
Disclosure of Invention
The invention provides an integrated plug-in voltage sensor and a circuit breaker for a 10kV pole-mounted circuit breaker, which are used for solving the technical problems of high application cost and inconvenient installation of the circuit breaker caused by large occupied space and high hidden danger of ferromagnetic resonance accident of an electromagnetic voltage transformer used for the current 10kV pole-mounted circuit breaker.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
an integrated plug-in voltage sensor for a 10kV pole-mounted circuit breaker is characterized by comprising three voltage sensor assemblies; the voltage sensor assembly comprises an insulating cylinder, an insulating cylinder insert and an electrical assembly arranged in the insulating cylinder;
one end of the insulating cylinder is fixedly connected with one end of the insulating cylinder insert, and the other ends of the three insulating cylinder inserts are respectively connected with three-phase corresponding outgoing line terminals of the circuit breaker;
the electrical component comprises a high-voltage dividing resistor R1, a low-voltage dividing resistor R2, an isolation transformer T and a low-voltage dividing capacitor C; one end of the high-voltage divider resistor R1 is connected with one end of the insulating cylinder insert through a connecting piece, the other end of the high-voltage divider resistor R1 is connected with one end of the low-voltage divider resistor R2, and the other end of the low-voltage divider resistor R2 is connected with the positive electrode of the low-voltage divider capacitor C; the low-voltage divider resistor R2 is connected to the primary side of the isolation transformer T; the negative electrode of the low-voltage-dividing capacitor C is grounded, the positive electrode and the negative electrode of the low-voltage-dividing capacitor C are used as zero sequence voltage secondary signals of the electrical component to be output, and the secondary side of the isolation transformer T is used for being connected with external terminal equipment.
The invention also provides a circuit breaker, which is characterized by comprising the integrated plug-in voltage sensor for the 10kV pole-mounted circuit breaker;
and the three-phase corresponding outgoing terminals of the circuit breaker are respectively connected with the other ends of the three insulating cylinder inserts.
Further, the insulating cylinder and the insulating cylinder insert are of an integral casting molding structure, and the casting material is nylon.
Further, the insulating cylinder insert includes a first insert segment and a second insert segment;
one end of the first insert block is connected with one end of the second insert block, the first insert block is mutually perpendicular to the second insert block, the other ends of the three first insert blocks are respectively positioned above the three-phase corresponding outgoing line terminals of the circuit breaker, and the first insert blocks are connected with the outgoing line terminals through bolts;
the second insert section and the insulating cylinder are of an integral casting molding structure, and the other end of the second insert section is in threaded connection with the connecting piece.
Further, a secondary signal output line is connected between the positive electrode and the negative electrode of the low-voltage dividing capacitor C and is used for outputting a zero sequence voltage secondary signal serving as an electrical component; the negative electrode of the low-voltage division capacitor C is connected with a grounding wire;
the secondary signal output line adopts an armored multi-core wire with an inner shielding layer and is output through a six-core aviation plug;
the grounding wire is connected with the grounding point of the circuit breaker by adopting a metal flange.
Further, the isolation transformer T adopts a silicon steel sheet iron core, and the iron core structure is CD type; the high-voltage divider resistor R1 and the low-voltage divider resistor R2 are metal film resistors.
Further, the high-voltage divider resistor R1 comprises two resistors which are connected in series and have the resistance of 1000kΩ;
the resistance value of the low-voltage divider resistor R2 is 20kΩ.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention provides an integrated externally-hung voltage sensor for a 10kV pole-mounted circuit breaker, which can collect phase voltage and zero sequence voltage, has small volume and light weight, does not need to be fixed by an additional mounting bracket and has no ferromagnetic resonance hidden trouble, and is particularly suitable for pole-mounted circuit breakers which cannot be provided with an electromagnetic voltage transformer due to narrow space.
2. According to the invention, the insulating cylinder and the insulating cylinder insert are of an integral casting molding structure, so that the installation is more convenient.
3. The insulating cylinder insert comprises the first insert block and the second insert block, and the first insert block is positioned above the wire outlet terminal when connected with the wire outlet terminal, so that the installation volume is further reduced.
4. The specific structural design of the secondary signal output line, the grounding line and the isolation transformer ensures that the voltage sensor has better safety.
Drawings
FIG. 1 is a schematic diagram of an embodiment of an integral plug-in voltage sensor for a 10kV pole-mounted circuit breaker;
fig. 2 is a schematic diagram of an embodiment of a circuit breaker according to the present invention;
FIG. 3 is a top view of FIG. 2;
FIG. 4 is a schematic diagram of the electrical assembly of FIG. 1;
fig. 5 is a schematic diagram of any of the phase electrical components of fig. 4.
Wherein: 1-voltage sensor assembly, 2-insulator cartridge, 3-electrical assembly, 4-insulator cartridge insert, 41-first insert block, 42-second insert block, 5-ground wire, 6-circuit breaker, 7-connector, 8-secondary signal output wire, 9-bolt.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
As shown in fig. 1 and 2, the invention provides an integrated plug-in voltage sensor for a 10kV pole-mounted circuit breaker, which comprises three voltage sensor assemblies 1, wherein the voltage sensor assemblies 1 comprise an insulating cylinder 2, an insulating cylinder insert 4 and an electrical assembly 3 arranged in the insulating cylinder 2. The following is a preferred embodiment of the invention, the insulating cylinder 2 is cast by nylon material, and is cast integrally with the insulating cylinder insert 4, the temperature and pressure resistant capability is strong, and the cylinder body of the insulating cylinder 2 is not deformed after the high and low temperature alternating test at-40-85 ℃. The insulating cylinder insert 4 comprises a first insert block 41 and a second insert block 42, one end of the first insert block 41 is connected with one end of the second insert block 42, the first insert block 41 is perpendicular to the second insert block 42, the other ends of the three first insert blocks 41 are respectively located above the three-phase corresponding outgoing line terminals of the circuit breaker 6, the first insert block 41 is connected with the outgoing line terminals through bolts 9 with the specification of M8, the second insert block 42 and the insulating cylinder are of an integrally cast molding structure, and the other ends of the second insert blocks 42 are in threaded connection with the connecting pieces 7.
As shown in fig. 4 and 5, the electrical component 3 includes a high-voltage dividing resistor R1, a low-voltage dividing resistor R2, an isolation transformer T and a low-voltage dividing capacitor C, one end of the high-voltage dividing resistor R1 is connected with one end of the insulating cylinder insert 4 through the connecting piece 7, the other end is connected with one end of the low-voltage dividing resistor R2, the other end of the low-voltage dividing resistor R2 is connected with the positive pole of the low-voltage dividing capacitor C, the low-voltage dividing resistor R2 is connected to the primary side of the isolation transformer T, the negative pole of the low-voltage dividing capacitor C is grounded, and the positive pole and the negative pole of the low-voltage dividing capacitor C are used as zero sequence voltage secondary signals of the electrical component 3 for outputting. A secondary signal output line 8 is connected between the positive electrode and the negative electrode of the low-voltage-dividing capacitor C and used for outputting a zero-sequence voltage secondary signal of the electrical component 3, the negative electrode of the low-voltage-dividing capacitor C is connected with a grounding wire 5, the secondary signal output line 8 adopts an armored multi-core wire with an inner shielding layer and is output through a six-core aviation plug, and the grounding wire 5 is connected with a grounding point of the circuit breaker 6 through a metal flange. In this embodiment, the electrical component 3 adopts a resistive-capacitive voltage division mode, and is composed of three phase sequence voltage sensors and a zero sequence voltage sensor, wherein the phase sequence voltage sensors are composed of a high voltage divider resistor R1, a low voltage divider resistor R2 and an isolation transformer T, and the zero sequence voltage sensor is composed of a low voltage divider capacitor C. The isolation transformer T adopts a silicon steel sheet as an iron core material, a CD type iron core structure is adopted, a secondary coil is designed in an isolation way, the saturation of the iron core is high, the voltage entering a linear working area is about 0.06V, the linear area of an output signal is 0.06V-35V, the bus voltage of 2% -190% point is supported to be measured for sampling protection, the linear working range of the output signal is 2% -200%, the output precision level requirement of the current voltage sensor at 0.5 level is met, in addition, the secondary side isolation way is adopted, the polarity end of the voltage signal which is secondarily output can not be grounded, the accuracy of the secondary output signal is improved, and the precision error problem brought by secondary grounding of the sensor is solved. The zero sequence voltage sensor collects zero sequence voltage signals through three-phase voltages, no voltage signals are output under normal conditions, and zero sequence voltage signals are output under the condition that single-phase grounding or three-phase voltage unbalance occurs in a line. The high-voltage divider resistor R1 and the low-voltage divider resistor R2 are both metal film resistors, the high-voltage divider resistor R1 can be formed by connecting two resistors in series, the resistance value of a single resistor is 1000k omega, the low-voltage divider resistor R2 can be formed by one resistor, the resistance value is about 20k omega, and the low-voltage divider resistor outputs 10V.
The electronic voltage sensor can be integrated with the ring main unit or the circuit breaker, the circuit breaker pole is built in or the ring main unit cable chamber is built in, and the secondary signal is output to the terminal device through an analog quantity mode. The voltage sensor outputs electronic small signals in a secondary isolation mode, and the service life and the precision of the sensor cannot be influenced after the secondary signals are short-circuited.
Based on the above-mentioned integrated plug-in voltage sensor for the 10kV pole-mounted circuit breaker, as shown in fig. 2 and 3, the invention further provides a circuit breaker, and three outgoing terminals corresponding to three phases of the circuit breaker 6 are respectively connected with the other ends of the three insulating cylinder inserts 4. When the voltage sensor hanging net is electrified, 10kV voltage is input to the input end of the high-voltage dividing resistor R1, voltage signals are output at two ends of the low-voltage dividing capacitor C through the voltage division of the high-voltage dividing resistor R1 and the low-voltage dividing resistor R2, and the isolation transformer T is responsible for converting the voltage signals output by the C into standard phase voltage small signals of 3.25/v 3 and outputting the standard phase voltage small signals to the terminal device.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An integrative plug-in voltage sensor for 10kV post circuit breaker, its characterized in that: comprises three voltage sensor assemblies (1); the voltage sensor assembly (1) comprises an insulating cylinder (2), an insulating cylinder insert (4) and an electrical assembly (3) arranged in the insulating cylinder (2);
one end of the insulating cylinder (2) is fixedly connected with one end of the insulating cylinder insert (4), and the other ends of the three insulating cylinder inserts (4) are respectively connected with three corresponding outlet terminals of the circuit breaker (6);
the electrical component (3) comprises a high-voltage dividing resistor R1, a low-voltage dividing resistor R2, an isolation transformer T and a low-voltage dividing capacitor C; one end of the high-voltage divider resistor R1 is connected with one end of the insulating cylinder insert (4) through a connecting piece (7), the other end of the high-voltage divider resistor R1 is connected with one end of the low-voltage divider resistor R2, and the other end of the low-voltage divider resistor R2 is connected with the positive electrode of the low-voltage divider capacitor C; the low-voltage divider resistor R2 is connected to the primary side of the isolation transformer T; the negative electrode of the low-voltage-dividing capacitor C is grounded, the positive electrode and the negative electrode of the low-voltage-dividing capacitor C are used as zero sequence voltage secondary signals of the electrical component (3) to be output, and the secondary side of the isolation transformer T is used for being connected with external terminal equipment.
2. An integrated plug-in voltage sensor for a 10kV pole-mounted circuit breaker as recited in claim 1, wherein: the insulating cylinder (2) and the insulating cylinder insert (4) are of an integral casting molding structure, and the casting material is nylon.
3. An integrated plug-in voltage sensor for a 10kV pole-mounted circuit breaker according to claim 1 or 2, characterized in that: the insulation cylinder insert (4) comprises a first insert segment (41) and a second insert segment (42);
one end of the first insert section (41) is connected with one end of the second insert section (42), the first insert section (41) is perpendicular to the second insert section (42), the other ends of the three first insert sections (41) are respectively located above the outlet terminals corresponding to the three phases of the circuit breaker (6), and the first insert sections (41) are connected with the outlet terminals through bolts (9);
the second insert section (42) and the insulating cylinder (2) are of an integrally cast molding structure, and the other end of the second insert section (42) is in threaded connection with the connecting piece (7).
4. An integrated plug-in voltage sensor for a 10kV pole-mounted circuit breaker as claimed in claim 3, wherein: a secondary signal output line (8) is connected between the positive electrode and the negative electrode of the low-voltage dividing capacitor C and is used for outputting a zero sequence voltage secondary signal serving as an electrical component (3); the negative electrode of the low-voltage division capacitor C is connected with a grounding wire (5);
the secondary signal output line (8) adopts an armored multi-core wire with an inner shielding layer and outputs through a six-core aviation plug;
the grounding wire (5) is connected with the grounding point of the circuit breaker (6) by adopting a metal flange.
5. The integrated plug-in voltage sensor for a 10kV pole-mounted circuit breaker of claim 4, wherein: the isolation transformer T adopts a silicon steel sheet iron core, and the iron core structure is CD type; the high-voltage divider resistor R1 and the low-voltage divider resistor R2 are metal film resistors.
6. The integrated plug-in voltage sensor for a 10kV pole-mounted circuit breaker of claim 5, wherein:
the high-voltage divider resistor R1 comprises two resistors which are connected in series and have the resistance value of 1000k omega;
the resistance value of the low-voltage divider resistor R2 is 20kΩ.
7. A circuit breaker, characterized in that: an integrated plug-in voltage sensor for a 10kV pole-on circuit breaker comprising the device of any one of claims 1 to 6;
and the three corresponding outlet terminals of the circuit breaker (6) are respectively connected with the other ends of the three insulating cylinder inserts (4).
8. The circuit breaker of claim 7, wherein: the insulation cylinder insert (4) comprises a first insert segment (41) and a second insert segment (42);
one end of the first insert section (41) is connected with one end of the second insert section (42), the first insert section (41) is perpendicular to the second insert section (42), the other ends of the three first insert sections (41) are respectively located above the outlet terminals corresponding to the three phases of the circuit breaker (6), and the first insert sections (41) are connected with the outlet terminals through bolts (9);
the second insert section (42) and the insulating cylinder (2) are of an integrally cast molding structure, and the other end of the second insert section (42) is in threaded connection with the connecting piece (7).
9. The circuit breaker of claim 8, wherein: the insulating cylinder (2) and the insulating cylinder insert (4) are of an integral casting molding structure, and the casting material is nylon;
the isolation transformer T adopts a silicon steel sheet iron core, and the iron core structure is CD type; the high-voltage divider resistor R1 and the low-voltage divider resistor R2 are metal film resistors;
the high-voltage divider resistor R1 comprises two resistors which are connected in series and have the resistance value of 1000k omega;
the resistance value of the low-voltage divider resistor R2 is 20kΩ.
10. A circuit breaker according to claim 9, characterized in that: a secondary signal output line (8) is connected between the positive electrode and the negative electrode of the low-voltage dividing capacitor C and is used for outputting a zero sequence voltage secondary signal serving as an electrical component (3); the negative electrode of the low-voltage division capacitor C is connected with a grounding wire (5);
the secondary signal output line (8) adopts an armored multi-core wire with an inner shielding layer and outputs through a six-core aviation plug;
the grounding wire (5) is connected with the grounding point of the circuit breaker (6) by adopting a metal flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310191252.6A CN116165418A (en) | 2023-03-02 | 2023-03-02 | Integrated plug-in voltage sensor and circuit breaker for 10kV pole-mounted circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310191252.6A CN116165418A (en) | 2023-03-02 | 2023-03-02 | Integrated plug-in voltage sensor and circuit breaker for 10kV pole-mounted circuit breaker |
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| Publication Number | Publication Date |
|---|---|
| CN116165418A true CN116165418A (en) | 2023-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310191252.6A Pending CN116165418A (en) | 2023-03-02 | 2023-03-02 | Integrated plug-in voltage sensor and circuit breaker for 10kV pole-mounted circuit breaker |
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| CN (1) | CN116165418A (en) |
Cited By (1)
| 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 |
-
2023
- 2023-03-02 CN CN202310191252.6A patent/CN116165418A/en active Pending
Cited By (1)
| 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 |
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Inventor after: Tian Baolong Inventor after: Wang Zhongyou Inventor after: Zhu Yunjiang Inventor after: Yan Hao Inventor after: Liu Chaojiang Inventor after: Yan Peng Inventor after: Cheng Run Inventor before: Yan Hao Inventor before: Wang Zhongyou Inventor before: Zhu Yunjiang Inventor before: Liu Chaojiang Inventor before: Yan Peng Inventor before: Zhang Yongsheng Inventor before: Cheng Run |