CN219393295U - Small-sized breaker with current, voltage and zero sequence transformer mounting structure - Google Patents

Abstract

The utility model discloses a miniature circuit breaker with a current, voltage and zero sequence transformer mounting structure, which comprises a circuit breaker body, wherein an isolation cabin with a cover plate is arranged at the rear end of the circuit breaker body, the rear end of the isolation cabin is a wire inlet terminal, and the front end of the circuit breaker body is a wire outlet terminal; the shielding frame is embedded in the peripheral wall of the isolation cabin, the through type current transformer is arranged at the bottom of the isolation cabin and close to the incoming line terminal, the zero sequence transformer is arranged at the bottom of the isolation cabin and close to the outgoing line terminal, and the through type voltage transformer is arranged in the middle of the isolation cabin; the lead wire entering from the lead-in terminal penetrates into the breaker body from the zero sequence transformer after penetrating from the through type current transformer and the through type voltage transformer respectively. The utility model effectively avoids mutual interference of strong current and weak current, simultaneously sets the shielding frame to avoid interference to other sensors in the breaker body, reduces the complexity of wiring through reasonable arrangement, only needs to be connected with an incoming and outgoing line externally, and simultaneously increases the safety of the line by a simplified wiring mode.

Description

Small-sized breaker with current, voltage and zero sequence transformer mounting structure

Technical Field

The utility model relates to the technical field of circuit breakers, in particular to a miniature circuit breaker with a current, voltage and zero sequence transformer mounting structure.

Background

The existing intelligent circuit breaker needs to collect voltage, current and leakage signals and then control the intelligent circuit breaker, and the intelligent circuit breaker is generally collected by means of a voltage transformer, a current transformer and a zero sequence transformer, but the transformers are all installed by independent circuit breakers and are not integrated with the circuit breakers, so that the intelligent circuit breaker has the function of separating strong current from weak current. But this kind of mounting means needs outside installation transformer alone, then with mutual-inductor and circuit breaker wiring one by one, and outside inlet wire needs the manual work to connect the mutual-inductor simultaneously, and not only the construction degree of difficulty is big, connects the mistake easily, and the circuit is complicated moreover, and factor of safety reduces.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide the miniature circuit breaker with the installation structure of the current, voltage and zero sequence transformer, so that the connection circuit is simplified, the integrated design is realized, the separation of strong current and weak current is ensured, and the mutual interference after centralized installation is reduced.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

the miniature circuit breaker with the current, voltage and zero sequence transformer mounting structure comprises a circuit breaker body, wherein an isolation cabin with a cover plate is arranged at the rear end of the circuit breaker body, the rear end of the isolation cabin is a wire inlet terminal, and the front end of the circuit breaker body is a wire outlet terminal; the shielding frame is embedded in the peripheral wall of the isolation cabin, the through type current transformer is arranged at the bottom of the isolation cabin and close to the incoming line terminal, the zero sequence transformer is arranged at the bottom of the isolation cabin and close to the outgoing line terminal, and the through type voltage transformer is arranged in the middle of the isolation cabin; the lead wire entering from the lead-in terminal penetrates into the breaker body from the zero sequence transformer after penetrating from the through type current transformer and the through type voltage transformer respectively.

Further, the bottom of the isolation cabin is a ceramic plate, a plurality of binding posts extend out of the bottom of the ceramic plate, and the binding posts are connected with corresponding connection points of the through type current transformer, the through type voltage transformer and the zero sequence transformer through conductive plates, and the conductive plates are detachably fixed through bolts or nuts.

Further, two shielding plates are movably clamped in the shielding frame transversely, so that the through type current transformer, the through type voltage transformer and the zero sequence transformer are isolated, and the shielding plates are provided with U-shaped clamping grooves with downward openings for penetrating wires.

Furthermore, two groups of clamping grooves are symmetrically formed in the inner side of the shielding frame and used for fixing the shielding plate.

Further, the wire inlet terminal is provided with two rows of wire clamps, and the wires are detachably fixed through the wire clamps on the inner side.

The utility model reasonably designs the structure of the circuit breaker, and is provided with an isolation cabin for installing current, voltage and zero sequence transformers, so that mutual interference of strong current and weak current is avoided, and meanwhile, a shielding frame is arranged so as to avoid interference to other sensors in the circuit breaker body.

Drawings

FIG. 1 is a top view of the present utility model;

FIG. 2 is a schematic perspective view of the first embodiment of the present utility model;

FIG. 3 is an enlarged schematic view of portion A of FIG. 3;

fig. 4 is a schematic perspective view of the second embodiment of the present utility model.

In the figure, a 1-breaker body, a 11-outgoing terminal, a 12-incoming terminal, a 13-binding post, a 14-conducting plate, a 2-line clamp, a 3-isolation cabin, a 31-shielding frame, a 4-cover plate, a 5-through type current transformer, a 6-through type voltage transformer, a 7-zero sequence transformer, an 8-shielding plate and a 9-conducting wire.

Detailed Description

The following describes the embodiments of the present utility model further with reference to the drawings. The description of these embodiments is provided to assist understanding of the present utility model, but is not intended to limit the present utility model. In addition, the technical features of the embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

As shown in fig. 1-4:

the miniature circuit breaker with the installation structure of the current, voltage and zero sequence transformer 7 comprises a circuit breaker body 1, wherein an isolation cabin 3 with a cover plate 4 is arranged at the rear end of the circuit breaker body 1, an incoming line terminal 12 is arranged at the rear end of the isolation cabin 3, and an outgoing line terminal 11 is arranged at the front end of the circuit breaker body 1; the shielding frame 31 is embedded in the peripheral wall of the isolation cabin 3, the through type current transformer 5 is arranged at the bottom of the isolation cabin 3 at the side close to the incoming line terminal 12, the zero sequence transformer 7 is arranged at the side close to the outgoing line terminal 11, and the through type voltage transformer 6 is arranged in the middle; the wires 9 entering from the wire inlet terminal 12 respectively pass through the through type current transformer 5 and the through type voltage transformer 6 and then intensively pass through the zero sequence transformer 7 into the breaker body 1.

The utility model reasonably designs the structure of the circuit breaker, and is provided with an isolation cabin 3 for installing current, voltage and zero sequence transformers 7 independently, so that mutual interference of strong current and weak current is avoided, and meanwhile, a shielding frame 31 is arranged so as to avoid interference to other sensors in the circuit breaker body 1.

As a further optimization scheme, the bottom of the isolation cabin 3 is provided with a ceramic plate, a plurality of binding posts 13 extend out from the bottom of the ceramic plate, the binding posts 13 are connected with corresponding connection points of the through type current transformer 5, the through type voltage transformer 6 and the zero sequence transformer 7 through conductive plates 14, the complexity of the circuit can be further reduced by utilizing bolts or nuts to detachably fix the conductive plates 14, the phenomenon that the circuit in the isolation cabin 3 is easy to short-circuited is avoided, and meanwhile, the mutual inductors are convenient to detach, install and wire connection (the bolts at the connection points play a role of fixing the bottom of the isolation cabin 3 at the same time, the ceramic plate plays a role of fixing and insulating, and has high hardness relative to plastic materials, and the safety is effectively improved).

As a further optimization scheme, two shielding plates 8 are transversely movably clamped in the shielding frame 31 so as to isolate the through type current transformer 5, the through type voltage transformer 6 and the zero sequence transformer 7, and U-shaped clamping grooves with downward openings are formed in the shielding plates 8 and used for penetrating the wires 9, so that interference between the transformers can be avoided to the maximum extent, the U-shaped clamping grooves are beneficial to direct plugging and unplugging of the shielding plates 8 under the condition that the wires 9 are not dismounted, the shielding plates 8 can be finally mounted during mounting, and the shielding plates 8 can be dismounted firstly during dismounting, and two groups of clamping grooves are symmetrically formed in the inner side of the shielding frame 31 and used for fixing the shielding plates 8.

As a further optimization scheme, the wire inlet terminal 12 is provided with two rows of wire clamps 2, and the wires 9 are detachably fixed through the wire clamps 2 on the inner side, so that the wires 9 can be pulled out and connected without being integrally detached, and the voltage, current or zero sequence transformer 7 can be detached and replaced independently.

The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the utility model, and yet fall within the scope of the utility model.

Claims (5)

1. A miniature circuit breaker with current, voltage, zero sequence transformer mounting structure, its characterized in that: the circuit breaker comprises a circuit breaker body, wherein an isolation cabin with a cover plate is arranged at the rear end of the circuit breaker body, the rear end of the isolation cabin is provided with a wire inlet terminal, and the front end of the circuit breaker body is provided with a wire outlet terminal; the shielding frame is embedded in the peripheral wall of the isolation cabin, the through type current transformer is arranged at the bottom of the isolation cabin and close to the incoming line terminal, the zero sequence transformer is arranged at the bottom of the isolation cabin and close to the outgoing line terminal, and the through type voltage transformer is arranged in the middle of the isolation cabin; the lead wire entering from the lead-in terminal penetrates into the breaker body from the zero sequence transformer after penetrating from the through type current transformer and the through type voltage transformer respectively.

2. The miniature circuit breaker with current, voltage, zero sequence transformer mounting structure of claim 1, characterized by: the bottom of the isolation cabin is a ceramic plate, a plurality of binding posts extend out of the bottom of the ceramic plate, and the binding posts are connected with corresponding connection points of the through type current transformer, the through type voltage transformer and the zero sequence transformer through conductive plates, and the conductive plates are detachably fixed through bolts or nuts.

3. The miniature circuit breaker with current, voltage, zero sequence transformer mounting structure of claim 2, characterized by: two shielding plates are movably clamped in the shielding frame transversely so as to isolate the through type current transformer, the through type voltage transformer and the zero sequence transformer, and U-shaped clamping grooves with downward openings are formed in the shielding plates and used for penetrating the wires.

4. The miniature circuit breaker with current, voltage, zero sequence transformer mounting structure of claim 2, characterized by: two groups of clamping grooves are symmetrically formed in the inner side of the shielding frame and used for fixing the shielding plate.

5. The miniature circuit breaker with current, voltage, zero sequence transformer mounting structure of claim 2, characterized by: the wire inlet terminal is provided with two rows of wire clamps, and the wires are detachably fixed through the wire clamps on the inner side.