CN218159962U

CN218159962U - Metering B-type leakage protection combined mutual inductor

Info

Publication number: CN218159962U
Application number: CN202221715375.2U
Authority: CN
Inventors: 邸兴宇; 耿辰; 王莹; 赵微; 王聪; 王董; 赵思; 田月久
Original assignee: HEBEI SHENKE ELECTRONICS CO Ltd
Current assignee: HEBEI SHENKE ELECTRONICS CO Ltd
Priority date: 2022-07-04
Filing date: 2022-07-04
Publication date: 2022-12-27
Anticipated expiration: 2032-07-04

Abstract

The utility model belongs to the technical field of the mutual-inductor, concretely relates to measurement B type leaks protects combination formula mutual-inductor, protect mutual inductance portion, measurement mutual inductance portion, the utmost point line of L and the utmost point line of N including leaking, leak and protect mutual inductance portion and pile up on measurement mutual inductance portion and fixed connection, leak and protect mutual inductance portion and protect the magnetic core including leaking the hourglass of protecting mutual inductance shell and setting in leaking protecting mutual inductance shell, measure mutual inductance portion including measurement mutual inductance shell and set up the measurement magnetic core in measuring mutual inductance shell, the utmost point line of L passes the inner ring of leaking the magnetic core of protecting, the utmost point line of N passes the inner ring of leaking the magnetic core of protecting and measuring the magnetic core. The adoption piles up the mutual-inductor combination with measurement, hourglass guarantor two kinds of functions to through the coiling of the utmost point line of L after the integration and the utmost point line of N, guaranteed that the measurement of upper portion earth leakage protection and lower part can both normally work, on the basis that improves the integration level, practices thrift installation space, still guaranteed better detection precision, make the product added value very promote.

Description

Metering B-type leakage protection combined mutual inductor

Technical Field

The utility model belongs to the technical field of the mutual-inductor, concretely relates to measurement B type leaks guarantor's combined transformer.

Background

The ac type electric leakage circuit breaker is an electric leakage protection circuit breaker which can break the sine alternating current residual current which is suddenly added and slowly increased, and the a type electric leakage circuit breaker is an electric leakage protection circuit breaker which can break the sine alternating current residual current which is suddenly added and slowly increased and the pulse sine direct current residual current which only has half-wave. The charging method is characterized in that the existence of smooth direct current is possibly accompanied when an automobile is charged, the smooth direct current can possibly damage the charged automobile, the B-type leakage protection circuit breaker can be used for effectively protecting the charging process, but the electrical control part of the charging pile is compact in structure, and therefore high requirements are provided for the transformer integration level of the leakage protection circuit breaker.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the problem that exists among the above-mentioned prior art, the utility model provides a measurement B type leaks and protects combined transformer has realized the integration of the current transformer that the measurement was used and current transformer for B type earth leakage protection circuit breaker, on improving space utilization's the basis, has guaranteed that the B type leaks the sensitivity of protecting the mutual-inductor.

The utility model discloses a specific technical scheme be:

measurement B type leaks protects combination formula mutual-inductor, including leaking and protecting mutual inductance portion, the mutual inductance portion of measurement, the utmost point line of L and the utmost point line of N, leak and protect mutual inductance portion and pile up on the mutual inductance portion of measurement and fixed connection, leak and protect mutual inductance portion and protect mutual inductance shell and set up the magnetic core of leaking protecting the hourglass in the mutual inductance shell of leakage including leaking, the mutual inductance portion of measurement is including the mutual inductance shell of measurement and setting up the measurement magnetic core in the mutual inductance shell of measurement, the utmost point line of L passes the inner ring of leaking the magnetic core of protecting, the utmost point line of N passes the inner ring of leaking the magnetic core of protecting and measuring the magnetic core.

The L pole primary line and the N pole primary line are of U-shaped structures respectively.

The leakage protection mutual inductance shell is provided with through holes for the L pole primary line and the N pole primary line to pass through respectively, and the metering mutual inductance shell is provided with through holes for the N pole primary line to pass through.

And an inserting separation blade is arranged between the through holes for the L pole primary wire and the N pole primary wire to penetrate out from the upper end of the leakage protection mutual inductance shell.

And a magnetic core shielding box is sleeved outside the leakage protection magnetic core.

The lower end of the metering mutual inductance shell is provided with a base sealing cover.

The lower end of the leakage protection mutual inductance shell is provided with a base inserting groove.

The side wall of the leakage protection mutual inductance shell is provided with a collecting secondary lead groove, the collecting secondary lead groove is provided with a plurality of slotted holes, the side wall of the metering mutual inductance shell is provided with a metering secondary lead groove, and the metering secondary lead groove is communicated with the slotted holes in the collecting secondary lead groove.

The utility model has the advantages that:

the utility model discloses a mode that piles up will measure, leak and protect the mutual-inductor of two kinds of functions and combine together, practiced thrift the installation space of mutual-inductor to through the coiling of the utmost point line of L after the integration and the utmost point line of N, guaranteed that the measurement of upper portion earth leakage protection and lower part can both normally work, on the basis that improves the integrated level, practices thrift installation space, still guaranteed better detection precision, make the product added value very promote.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is an exploded schematic view of the present invention;

FIG. 3 is a schematic view of the bottom view of FIG. 2;

in the attached drawing, 1, L pole primary wires, 2, N pole primary wires, 3, leakage protection mutual inductance shells, 4, leakage protection magnetic cores, 5, measurement mutual inductance shells, 6, measurement magnetic cores, 7, plug-in separation blades, 8, base sealing covers, 9, base plug-in connection grooves, 10, collecting secondary lead wire grooves, 11, slotted holes, 12 and measurement secondary lead wire grooves.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings and specific embodiments:

specific embodiment is shown in fig. 1, fig. 2 and fig. 3, the utility model relates to a measurement B type leaks protects combined transformer, protect mutual inductance portion, measurement mutual inductance portion, the utmost point primary winding 1 of L and the utmost point primary winding 2 including leaking, leak and protect mutual inductance portion and pile up on measurement mutual inductance portion and fixed connection, leak and protect mutual inductance portion and protect mutual inductance shell 3 and set up the hourglass in leaking protecting mutual inductance shell 3 and protect magnetic core 4 including leaking, measure mutual inductance portion including measurement mutual inductance shell 5 and set up measurement magnetic core 6 in measurement mutual inductance shell 5, the utmost point primary winding 1 of L passes the inner ring of leaking and protecting magnetic core 4, the utmost point primary winding 2 of N passes the inner ring of leaking and protecting magnetic core 4 and measurement magnetic core 6.

The utility model discloses a pile up will leak when will be protected mutual inductance portion, the mutual inductance portion combination of measurement to pass through the inner ring that leaks and protect magnetic core 4 through the utmost point primary winding 1 of L, the utmost point primary winding 2 of N passes the inner ring that leaks and protect magnetic core 4 and measurement magnetic core 6. Guarantee to leak and protect magnetic core 4 and sample alone L utmost point primary line 1, measurement magnetic core 6 samples respectively to L utmost point primary line 1 and N utmost point primary line 2, has guaranteed the normal work of mutual-inductor separately.

As shown in fig. 2, the measuring B-type leakage protection combined transformer of the present invention is designed to be composed of two parts, one part is a measuring mutual inductance part for measuring, and adopts an ultra-microcrystalline magnetic core, a live wire is introduced once, and a current is detected twice to realize the function of measuring. The other part is a current transformer for the B-type leakage protection circuit breaker, and the leakage current is smooth to be a small current of mA level, so that the sensitivity of the transformer is higher. The working condition of the B-type leakage protection mutual inductor is 2.5KHz 5V, and the mutual inductor is required to be quickly saturated in 0.4ms but cannot be deeply saturated; the working temperature of the mutual inductor is-40 to 105 ℃.

The core material of the leakage protection magnetic core 4 is 1K107B. The reason is that compared with 1K107B and 1K107, the magnetic permeability is high when the magnetic core is not saturated, the magnetic permeability is low when the magnetic core is saturated and at high and low temperatures, so that the magnetic core has the possibility of generating jump change, the consistency of the magnetic core heat treatment is difficult to control when the magnetic core is manufactured in batches, and the magnetic core is not suitable for charging piles; compared with 1K107, the magnetic permeability of the 1K107B magnetic core is relatively less influenced by high and low temperatures, so that the high and low temperature performance of the finished product can be effectively improved.

The material of the magnetic core is an amorphous nanocrystalline material formed by Fe, si, nb, B, cu and other element systems, the material is processed by a vacuum smelting and pressure strip-making process, compared with the traditional amorphous nanocrystalline material, the material has the characteristics of few component impurities, high stability of components and thickness of strips, the proportion of amorphous nanocrystalline mixed phases is accurately controlled by a special heat treatment process and a shaping technology, and when the magnetic core is unsaturated in electromagnetic exchange coupling, the magnetic core has the characteristics of high magnetic conductivity, good consistency and good high-low temperature tolerance, and when the magnetic core is saturated, the magnetic core is easy to change, and has good consistency and stable and reliable performance.

Further, as shown in fig. 2 and 3, the L-pole primary line 1 and the N-pole primary line 2 are respectively U-shaped. The primary wire of the U-shaped structure straddles on the ring of the magnetic core, and the leads on the two sides of the parallel arrangement are convenient for completing the assembly of the mutual inductor.

Further, as shown in fig. 2 and 3, the leakage protection mutual inductance housing 3 is provided with through holes for the L-pole primary line 1 and the N-pole primary line 2 to pass through, and the measurement mutual inductance housing 5 is provided with through holes for the N-pole primary line 2 to pass through.

Through the through holes which are arranged on the leakage protection mutual inductance shell 3 and the measurement mutual inductance shell 5 and are respectively used for penetrating the L-pole primary line 1 and the N-pole primary line 2 as shown in the figures 2 and 3, the high integration level is realized, meanwhile, the installation position of the primary line is ensured, and the stability and the uniformity of the product measurement parameters are improved

Furthermore, an inserting separation blade 7 is arranged between through holes, through which the L pole primary line 1 and the N pole primary line 2 penetrate out, at the upper end of the leakage protection mutual inductance shell 3.

The grafting separation blade 7 includes the lamellar body and the inserted bar of being connected with the lamellar body, makes the grafting separation blade 7 can with the mutual inductance shell 3 of leakage protection with the help of the inserted bar, makes L utmost point primary line 1 and the 2 formation separation between the end of wearing out of N utmost point primary line with the help of grafting separation blade 7, guarantees the electrical isolation between zero line and the live wire.

Furthermore, a magnetic core shielding box is sleeved outside the leakage protection magnetic core 4.

Experiments prove that only a small force is used for extruding the leakage protection magnetic core 4, the inductance value of the leakage protection magnetic core 4 is reduced by hundreds of times or even thousands of times under the same test condition, so that a protection box magnetic core structure is adopted, the hardness of the protection box material is enough, external shielding is guaranteed, and the winding and encapsulation are not likely to extrude the magnetic core product, so that the stability of performance is guaranteed.

The shielding material of the magnetic core shielding box is iron-nickel alloy (permalloy) as a soft magnetic material, and the magnetic core shielding box is high in magnetic conductivity, easy to magnetize, small in coercive force, small in residual magnetism and easy to demagnetize;

magnetic core shielding box structure: making into a box-shaped shield; and the thickness of the iron-nickel alloy strip is small, so that the space in the transformer box is saved.

Further, a base sealing cover 8 is arranged at the lower end of the metering mutual inductance shell 5. The measuring mutual inductance device is used for plugging the inner cavity of the measuring mutual inductance shell 5 after insulating resin is filled in the measuring mutual inductance shell 5 to bury the measuring coil.

Further, as shown in fig. 3, a base inserting groove 9 is arranged at the lower end of the leakage protection mutual inductance housing 3.

The leakage protection part considers the universality of product parts in independent use and matched use, and a structure matched with the base is reserved at the lower end of the leakage protection mutual inductance shell 3, so that the base corresponding to the leakage protection mutual inductance shell 3 is matched under different requirements, and the leakage protection part can be selected to be independently used.

As shown in fig. 2, a blocking piece for blocking the L-pole primary line 1 is further arranged on the contact surface of the leakage protection mutual inductance housing 3 and the measurement mutual inductance housing 5, so as to ensure the sealing performance of the leakage protection mutual inductor.

Further, as shown in fig. 1 and 2, a collecting secondary lead groove 10 is provided on a side wall of the leakage protection mutual inductance housing 3, the collecting secondary lead groove 10 is provided with a plurality of slots 11, a metering secondary lead groove 12 is provided on a side wall of the metering mutual inductance housing 5, and the metering secondary lead groove 12 is communicated with the slots 11 in the collecting secondary lead groove 10.

The plurality of slotted holes 11 of the secondary lead collecting groove 10 comprise slotted holes 11 coinciding with the positions of the metering secondary lead grooves 12 and slotted holes 11 used for leading out the secondary leads of the leakage protection coils independently, even if the leakage protection parts are used independently, the slotted holes 11 and the hole positions corresponding to the metering secondary lead grooves 12 are left empty or filled up, the secondary leads are collected together, the connection of devices is facilitated, the independent use of the leakage protection parts is facilitated, and the flexible and easy-to-use characteristics of products are improved.

Claims

1. Measurement B type leaks protects combination formula mutual-inductor, including leaking to protect mutual inductance portion, measurement mutual inductance portion, the utmost point primary line of L (1) and the utmost point primary line of N (2), its characterized in that: mutual inductance portion piles up and fixed connection on the mutual inductance portion of measurement, leak and protect mutual inductance portion including leaking to protect mutual inductance shell (3) and set up leak in leaking to protect mutual inductance shell (3) and protect magnetic core (4), the mutual inductance portion of measurement is including measuring mutual inductance shell (5) and setting measurement magnetic core (6) in measuring mutual inductance shell (5), the inner ring of magnetic core (4) is protected in the hourglass is passed in L utmost point primary line (1), the inner ring of magnetic core (4) and measurement magnetic core (6) is protected in the hourglass is passed in N utmost point primary line (2).

2. The metering type-B leakage protection combined transformer according to claim 1, characterized in that: the L-pole primary line (1) and the N-pole primary line (2) are of U-shaped structures respectively.

3. The metering type-B leakage protection combined transformer according to claim 1, characterized in that: through holes for the L-pole primary line (1) and the N-pole primary line (2) to pass through are respectively arranged on the leakage protection mutual inductance shell (3), and through holes for the N-pole primary line (2) to pass through are arranged on the metering mutual inductance shell (5).

4. The metering type-B leakage protection combined transformer according to claim 3, wherein: an inserting separation blade (7) is arranged between through holes through which the L pole primary line (1) and the N pole primary line (2) penetrate out at the upper end of the leakage protection mutual inductance shell (3).

5. The metering type-B leakage protection combined transformer according to claim 1, characterized in that: and a magnetic core shielding box is sleeved outside the leakage protection magnetic core (4).

6. The metering type-B leakage protection combined transformer according to claim 1, characterized in that: the lower end of the metering mutual inductance shell (5) is provided with a base sealing cover (8).

7. The metering type-B leakage protection combined transformer according to claim 1, characterized in that: the lower end of the leakage protection mutual inductance shell (3) is provided with a base inserting groove (9).

8. The metering type-B leakage protection combined transformer according to claim 1, characterized in that: the leakage protection mutual inductance shell (3) is provided with a collecting secondary lead groove (10) on the side wall, the collecting secondary lead groove (10) is provided with a plurality of slotted holes (11), the metering secondary lead groove (12) is arranged on the side wall of the metering mutual inductance shell (5), and the metering secondary lead groove (12) is communicated with the slotted hole (11) in the collecting secondary lead groove (10).