KR102056245B1 - Electronic trip device of circuit breaker - Google Patents

Abstract

It is an object of the present invention to provide an electronic trip device for a circuit breaker in which insulation performance between conductors is improved without increasing the size of the case in which the main PCB and the auxiliary PCB are installed.
Electronic trip device of the circuit breaker according to an embodiment of the present invention includes a main PCB for controlling the operation of the breaker mechanism; A base structure on which the main PCB is mounted; An auxiliary PCB mounted inside the base structure and configured to measure voltages of a plurality of main circuit terminals through which a main current is energized, and transmit voltage information of the main circuit to the main PCB; A plurality of voltage measurement conductors connected between a plurality of main circuit terminals and the auxiliary PCB; A plurality of conductor connection parts formed on one side of the auxiliary PCB with a gap therebetween and connected to each of the plurality of voltage measurement conductors; A plurality of insulating spaces formed in the base structure and accommodating each of the plurality of conductor connecting portions; And an insulating partition wall formed in the base structure to partition the plurality of insulating space parts and surrounding at least the left side, the right side, the upper end, and the lower end of each of the plurality of insulating space parts.

Description

Electronic trip device of circuit breaker for wiring {ELECTRONIC TRIP DEVICE OF CIRCUIT BREAKER}

The present invention relates to an electronic trip device for a circuit breaker, and more particularly, to an electronic trip device for a circuit breaker capable of measuring the voltage of the circuit breaker main circuit and operating the circuit breaker according to the measured voltage value.

The electronic trip device for a circuit breaker capable of measuring voltage includes a terminal for voltage measurement, which is separated into individual poles and electrically connected to a conductor of the main circuit.

The electronic trip device includes an auxiliary PCB for voltage drop and surge protection between the voltage measuring terminal and the main PCB to protect the main PCB from overvoltage of the main circuit.

Here, a case for fixing the auxiliary PCB and the voltage measuring terminal and ensuring phase insulation is provided in a narrow space of the circuit breaker, and an insulating partition wall is formed in the case for securing phase insulation between the terminals.

However, since the electronic trip device according to the related art is configured in the form of a vertical wall in which the insulating partition walls are disposed between phases, there is a problem that current breaks easily through the insulating partition wall and the phase breakdown occurs when the height of the insulating partition walls is low. have.

In addition, the electronic trip device according to the related art has a structure that ensures an insulation distance between phases according to the height of the insulation partition wall, and in order to increase the insulation voltage of the circuit breaker, the height of the insulation partition wall must be increased, thereby increasing the size of the product. There are disadvantages.

An electronic trip device according to the related art having such a simple vertical insulating partition wall is disclosed in Korean Patent Registration No. 10-1489973.

The present invention has been made to solve at least some of the problems of the prior art, as an aspect, an electronic trip device of a circuit breaker for improving the insulation performance between conductors without increasing the size of the case in which the main PCB and the auxiliary PCB is installed The purpose is to provide.

As one aspect for achieving at least some of the above object, the present invention is a main PCB for controlling the operation of the blocking mechanism; A base structure on which the main PCB is mounted; An auxiliary PCB mounted inside the base structure and configured to measure voltages of a plurality of main circuit terminals through which a main current is energized, and transmit voltage information of the main circuit to the main PCB; A plurality of voltage measurement conductors connected between a plurality of main circuit terminals and the auxiliary PCB; A plurality of conductor connection parts formed on one side of the auxiliary PCB with a gap therebetween and connected to each of the plurality of voltage measurement conductors; A plurality of insulating spaces formed in the base structure and accommodating each of the plurality of conductor connecting portions; And an insulating partition wall formed in the base structure to partition the plurality of insulating spaces, and surrounding at least left, right, top, and bottom portions of each of the plurality of insulating spaces. A first base on which the auxiliary PCB and the main PCB are mounted, and a second base coupled to cover the other surface of the first base, wherein the insulating partition wall includes: a main partition wall formed on the first base; A lower auxiliary partition wall formed on the second base; And an upper auxiliary barrier rib formed on a base cover mounted on one surface of the first base, wherein the voltage measuring conductor is drawn out into a space between the first base and the second base in the first base. Is provided, the draw hole provides an electronic trip device of the circuit breaker existing on the outside of the insulating partition wall.

In one embodiment, the voltage measurement conductor may be composed of a flexible wire.

In some embodiments, the plurality of insulating spaces may include a first insulating space part, a second insulating space part, a third insulating space part, and a fourth insulating space part formed to be parallel to each other.

In addition, in one embodiment, the main PCB is mounted so as to be stacked on the auxiliary PCB, the base structure is disposed between the main PCB and the auxiliary PCB mounted on one surface of the first base to cover the auxiliary PCB It may further include a base cover.

In addition, in one embodiment, the main partition wall is bent in a zigzag shape such that an upper end of the first insulating space part, a lower end of the second insulating space part, an upper end of the third insulating space part, and a lower end of the fourth insulating space part are opened. Can be formed.

In an embodiment, the upper auxiliary partition wall may be configured to cover an upper end of the first insulating space part and an upper end of the third insulating space part.

In an embodiment, the lower auxiliary partition wall may be configured to cover the lower end of the second insulating space part and the lower end of the fourth insulating space part.

In addition, in one embodiment, the main partition wall may be formed in the bent portion of the top and bottom flat.

In addition, in one embodiment, the main partition wall may be formed with a seating portion bent inwardly of the insulating space so that the conductor connecting portion is seated.

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According to one embodiment of the present invention having such a configuration, it is possible to obtain an effect that the interphase insulation performance is improved and the device can be miniaturized.

1 is an exploded perspective view of an electronic trip device according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view of a base structure, an auxiliary PCB, and a voltage measuring conductor included in the electronic trip device shown in FIG. 1.
FIG. 3 is a perspective view of a first base included in the base structure shown in FIG. 2.
4 is a plan view of the first base illustrated in FIG. 3.
FIG. 5 is a bottom perspective view of the first base shown in FIG. 3.
FIG. 6 is a cross-sectional view taken along line BB ′ of the first base illustrated in FIG. 3.
FIG. 7 is an exploded perspective view illustrating an assembly structure of the first base, the auxiliary PCB, and the voltage measuring conductor shown in FIG. 2.
8 is a cross-sectional view taken along line AA ′ of the base structure illustrated in FIG. 1.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Also, the singular forms in this specification include plural forms unless the context clearly indicates otherwise.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

1 to 8, an electronic trip device 100 according to an embodiment of the present invention will be described.

1 to 8, the electronic trip device 100 according to an embodiment of the present invention includes a main PCB 110, a base structure 120, an auxiliary PCB 130, and a plurality of voltage measuring conductors ( 140, the insulating spaces 151-4 and the insulating partition wall 160 may be included.

The main PCB 110 may control the operation of the blocking mechanism unit (not shown) of the circuit breaker.

The main PCB 110 may output an electrical operation signal to an actuator such as a strip coil or a solenoid for activating the blocking mechanism according to the measured voltage value of the main circuit terminal 12.

The main PCB 110 may output the operation signal of the actuator by receiving the voltage value information measured by the auxiliary PCB (130).

The base structure 120 is an insulating material member on which the main PCB 110 is mounted.

In one embodiment, the base structure 120 may be mounted on the top of the main PCB 110 as shown in Figure 1, the current transformer 10 and the main circuit terminal 12 is coupled to the top of the assembled assembly Can be.

The base structure 120 may serve to electrically insulate the main circuit terminal 12 and the main PCB 110 and the auxiliary PCB 130, and at the same time, the main circuit terminal 12 when the breaker is shorted and interrupted. It may serve to protect the main PCB 110 and the auxiliary PCB 130 from the arc gas generated between the gaps.

In one embodiment, the base structure 120 may include a first base 121, a second base 125 and a base cover 128.

The first base 121 may be mounted to the auxiliary PCB 130 and the main PCB 110 on one surface. For example, the first base 121 may include a plate portion 121a on which the auxiliary PCB 130 may be seated, and a wall portion 121b formed in a vertical direction on the outer edge of the plate, but is not limited thereto. It is not.

In one embodiment, the first base 121 is provided with a withdrawal hole 122 through which the voltage measuring conductor 140 to be described later can be drawn out into the space between the first base 121 and the second base 125. Can be.

The withdrawal hole 122 may be formed such that a portion of the plate portion 121a of the first base 121 is penetrated through the opening.

In such a structure, the auxiliary PCB 130 is disposed on the upper surface of the first base 121, and the voltage measuring conductor 140 to be described later is disposed on the lower surface of the first base 121, thereby providing a voltage with the auxiliary PCB 130. The measurement conductors 140 may be insulated from each other by the plate portion 121a of the first base 121.

In addition, as shown in FIG. 5, in one embodiment, the bottom surface of the first base 121 may be provided with a wire fastening groove 123 to which each of the plurality of voltage measuring conductors 140 is fastened and fixed. have.

On the other hand, the second base 125 may be coupled to the first base 121 to cover the other surface of the first base 121.

In an embodiment, the second base 125 may be joined to the other surface of the first base 121 to form a space in which the plurality of voltage measuring conductors 140 are accommodated. The second base 125 may protect the main PCB 110 and the auxiliary PCB 130 from arc gas generated in the main circuit terminal 12 during short circuit and interruption of the circuit breaker.

In addition, in one embodiment, the outer side of the second base 125 has a wire fixing groove 126, each of the plurality of voltage measuring conductors 140 to be described later is drawn out to the outside of the base structure 120 is fixed It may be formed.

On the other hand, the base cover 128 is disposed between the main PCB 110 and the auxiliary PCB 130 arranged in a stacked form to be mounted on one surface of the first base 121 to cover the auxiliary PCB 130 Can be.

The base cover 128 may function to insulate between the main PCB 110 and the auxiliary PCB 130.

In one embodiment, the upper auxiliary partition 166 may be formed on one side of the base cover 128. The structure of the upper auxiliary partition wall 166 will be described in detail in the description of the insulating partition wall 160 to be described later.

The auxiliary PCB 130 may be mounted inside the base structure 120 to measure voltages of the plurality of main circuit terminals 12 through which the main current is energized, and transmit voltage information of the main circuit to the main PCB 110. have.

In one embodiment, the auxiliary PCB 130 may be disposed between the first base 121 and the base cover 128.

In addition, the auxiliary PCB 130 may be provided with a transfer terminal 137 constituting a path that is electrically connected to the main PCB 110 to transfer the measured voltage value to the main PCB (110).

The auxiliary PCB 130 may have a plurality of voltage measuring conductors 140 connected to the main circuit terminal 12.

Here, the auxiliary PCB 130 may be provided with a plurality of conductor connection parts 131 to 4 to which each of the plurality of voltage measuring conductors 140 is connected one to one.

The plurality of conductor connecting portions 131 to 4 may be formed to extend on one side of the auxiliary PCB 130 at intervals as shown in FIGS. 2 and 7.

Here, the insulating partition wall 160 to be described later may be disposed in the interval between the conductor connecting portion (131 ~ 4).

In one embodiment, the conductor connecting portions 131 to 4 are voltage measuring connected to each of the first conductor connecting portion 131 to which the voltage measuring conductor 140 connected to the neutral terminal and the three main circuit terminals 12 are connected. It may be composed of a second conductor connector 132, a third conductor connector 133, and a fourth conductor connector 134 to which the conductor 140 is connected.

The voltage measuring conductor 140 is connected between the plurality of main circuit terminals 12 and the auxiliary PCB 130 to energize the current of the main circuit terminal 12, thereby assisting the voltage values of the respective main circuit terminals 12. Configure the path to transfer to the PCB (130).

To this end, for example, the voltage measuring conductor 140 may be composed of three conductors corresponding to each phase of the three-phase main circuit terminal 12 and one conductor corresponding to the neutral terminal (not shown). It is not limited.

Meanwhile, in one embodiment, the voltage measuring conductor 140 may be formed of a flexible wire that can be bent freely. The voltage measuring conductor 140 is bent freely in a state coupled to the conductor connecting portions 131 to 4 of the auxiliary PCB 130 and passes through the withdrawal hole 122 to allow the first base 121 and the second base 125. It can be placed in the space between.

In addition, in one embodiment, a terminal 142 connected to the main circuit terminal 12 may be provided at the end of the voltage measuring conductor 140.

The insulating spaces 151 to 4 are formed in the base structure 120, and each of the plurality of conductor connecting portions 131 to 4 may be separated from each other and accommodated therein.

In one embodiment, the insulating spaces 151 to 4 are formed in parallel with each other on the first base 121 as shown in Figs. 3, 6 and 8, the first insulating space 151, the second The insulating space part 152, the third insulating space part 153, and the fourth insulating space part 154 may be included.

In this case, the first conductor connection part 131 may be accommodated in the first insulating space part 151, and the second conductor connection part 132 and the third insulating space part 153 may be accommodated in the second insulating space part 152. ), The fourth conductor connection part 133 and the fourth insulating space part 154 may accommodate the fourth conductor connection part 134.

Meanwhile, the insulating spaces 151 to 4 may be partitioned by the insulating partition wall 160.

The insulating partition 160 is formed in the base structure 120 to partition the plurality of insulating spaces 151 to 4, and at least left, right, top and bottom of each of the plurality of insulating spaces 151 to 4. Can surround.

In other words, the insulating partition wall 160 may be configured to be formed at the lower and upper ends as well as the left and right sides of the plurality of insulating spaces 151 to 4.

To this end, in one embodiment, the insulating partition 160 may include a main partition 162, a lower auxiliary partition 164, and an upper auxiliary partition 166.

The main partition wall 162 has an upper end of the first insulating space 151, a lower end of the second insulating space 152, an upper end of the third insulating space 153, and a lower end of the fourth insulating space 154. The first base 121 may be bent in a zigzag form to be open.

As shown in FIGS. 3, 6, and 8, the main partition wall 162 includes a first insulating space part 151, a second insulating space part 152, a third insulating space part 153, and a fourth insulating material. The space part 154 may be partitioned in a horizontal direction, and is continuously formed to form the first insulation space part 151, the second insulation space part 152, the third insulation space part 153, and the fourth insulation space part. One of the upper and lower barrier ribs 154 may be formed.

In addition, in one embodiment, the main partition wall 162 may be configured to protrude upward from the plate portion 121a of the first base 121.

At this time, the bent portion of the top and bottom of the main partition 162 may be formed flat. The main PCB 110 may be seated on the flat top of the main partition 162.

In addition, in one embodiment, the main partition 162 may be further formed with a seating portion 168 bent to the inside of each insulating space (151 ~ 4) so that the conductor connecting portion (131 ~ 4) is seated.

Here, the seating portion 168 may be formed at the center height of the vertical partition wall formed in the main partition wall 162 to serve to hold the height direction positions of the plurality of conductor connecting parts 131 to 4.

On the other hand, the lower auxiliary partition 164 is formed on the second base 125, when the first base 121 and the second base 125 is coupled to the open lower end of the second insulating space portion 152 And an open lower end of the fourth insulating space 154.

In one embodiment, the lower auxiliary partition wall 164 is not formed to have a separate structure on the second base 125, the second when the second base 125 and the first base 121 is coupled The upper surface of the plate-shaped structure of the second base 125 disposed on the lower end of the insulating space 152 and the third insulating space 153, but is not limited to this, the second base 125 It may be configured as a separate structure that is separated from.

On the other hand, the upper auxiliary partition 166 is formed in the base cover 128, when the base cover 128 and the first base 121 is combined, the open top and the first of the first insulating space 151 3 may be configured to cover the open upper end of the insulating space 153.

In one embodiment, the upper auxiliary partition 166 may be configured to extend to one side of the base cover 128, as shown in Figure 2, the first insulating space 151 and the third insulating space portion It may be formed in a shape corresponding to the planar shape of the top of the (153).

Electronic trip device 100 according to an embodiment of the present invention as described above, the insulating partition 160 consisting of the main partition 162, the lower auxiliary partition 164 and the upper auxiliary partition 166, the conductor of each phase Since the enclosed in four directions to separate from each other, the insulating performance is improved.

In addition, the electronic trip device 100 according to an embodiment of the present invention can secure phase-to-phase insulation performance without increasing the height of the insulating partition 160, and thus, the device can be miniaturized.

While the invention has been shown and described with respect to particular embodiments, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as set forth in the claims below. I want to make it clear.

10: current transformer
12: main circuit terminal
100: electronic trip device of the circuit breaker
110: main PCB 120: base structure
121: first base 121a: plate portion
121b: wall 122: withdrawal hole
123: wire fastening groove 125: second base
126: wire fixing groove 128: base cover
130: auxiliary PCB 131 ~ 4: conductor connection
131: first conductor connecting portion 132: second conductor connecting portion
133: third conductor connector 134: fourth conductor connector
137: transfer terminal 140: voltage measuring conductor
142: terminal 151-4: insulation space
151: first insulating space portion 152: second insulating space portion
153: third insulating space portion 154: fourth insulating space portion
160: insulation bulkhead 162: main bulkhead
164: lower auxiliary bulkhead 166: upper auxiliary bulkhead
168: seating part

Claims (12)

A main PCB for controlling the operation of the disconnect mechanism;
A base structure on which the main PCB is mounted;
An auxiliary PCB mounted inside the base structure and configured to measure voltages of a plurality of main circuit terminals through which a main current is energized, and transmit voltage information of the main circuit to the main PCB;
A plurality of voltage measurement conductors connected between a plurality of main circuit terminals and the auxiliary PCB;
A plurality of conductor connection parts formed on one side of the auxiliary PCB with a gap therebetween and connected to each of the plurality of voltage measurement conductors;
A plurality of insulating spaces formed in the base structure and accommodating each of the plurality of conductor connecting portions; And
An insulating partition wall formed on the base structure to partition the plurality of insulating space parts, and surrounding at least left, right, top and bottom portions of each of the plurality of insulating space parts;
The base structure includes a first base on which one side of the auxiliary PCB and the main PCB are mounted, and a second base coupled to cover the other surface of the first base,
The insulating partition wall may include: a main partition wall formed on the first base;
A lower auxiliary partition wall formed on the second base; And
And an upper auxiliary partition formed on a base cover mounted on one surface of the first base.
The first base is provided with a lead-out hole for the voltage measuring conductor is drawn into the space between the first base and the second base,
The lead-out hole is an electronic trip device for a circuit breaker existing outside the insulating partition wall.
The method of claim 1,
The voltage measuring conductor is an electronic trip device of a circuit breaker consisting of a flexible wire.
The method of claim 1,
The plurality of insulating spaces are formed in parallel with each other, the electronic trip device of a circuit breaker including a first insulating space portion, a second insulating space portion, a third insulating space portion and a fourth insulating space portion.
delete The method of claim 1,
The main PCB is mounted to be stacked on the auxiliary PCB,
The base structure is an electronic trip device of the circuit breaker including the base cover is disposed between the main PCB and the auxiliary PCB mounted on one surface of the first base to cover the auxiliary PCB.
delete The method of claim 3,
The main bulkhead is an electronic trip device of a circuit breaker that is bent in a zigzag form so that an upper end of the first insulating space part, a lower end of the second insulating space part, an upper end of the third insulating space part, and a lower end of the fourth insulating space part are opened. .
The method of claim 7, wherein
And the upper auxiliary partition wall covers an upper end of the first insulating space part and an upper end of the third insulating space part.
The method of claim 7, wherein
And the lower auxiliary partition wall covers the lower end of the second insulating space part and the lower end of the fourth insulating space part.
delete The method of claim 7, wherein
The main bulkhead is an electronic trip device of a circuit breaker having a bent portion of the top and bottom flat.
The method of claim 7, wherein
An electronic trip device for a circuit breaker having a seating portion bent inwardly of the insulating space so that the conductor connecting portion is seated on the main partition wall.

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