WO2019146890A1

WO2019146890A1 - Power converter assembly of circuit breaker

Info

Publication number: WO2019146890A1
Application number: PCT/KR2018/013772
Authority: WO
Inventors: 손종만
Original assignee: 엘에스산전 주식회사
Priority date: 2018-01-25
Filing date: 2018-11-13
Publication date: 2019-08-01
Also published as: KR102003943B1

Abstract

The present invention provides a power converter assembly of a circuit breaker capable of improving generation efficiency of a power supply current by maximizing the cross-sectional area of a core. A power converter assembly of a circuit breaker according to the present invention comprises: a plurality of power transformers for converting power from a power circuit for each phase to supply a control power; a plurality of Rogowski coils for detecting a current flowing in the power circuit for each phase; a plurality of power converter printed circuit boards having a voltage dividing circuit unit for outputting voltage-controlled current detection signals by regulating the voltage of an output of the Rogowski coil connected to a rectifying circuit unit for rectifying the output of the power transformer and outputting DC power; and an enclosure housing the plurality of power converters, the plurality of Rogowski coils, and the plurality of power converter printed circuit boards, wherein each of the plurality of power converters comprises: a power transformer core having a first through-hole portion formed on one side thereof and a second through-hole portion formed on a lower portion thereof, wherein the first through-hole portion allows a primary winding electrically connected to the power circuit for each phase to pass therethrough; the primary winding wound in a horizontal direction in the first through-hole portion of the power transformer core; and a secondary winding wound in a direction perpendicular to the second through-hole portion of the power transformer core.

Description

Circuit breaker power transformer assembly

The present invention relates to a circuit breaker, and in particular, to a power transformer assembly including a power transformer for supplying power to a control unit in a circuit breaker for wiring (hereinafter abbreviated as a wiring breaker) and a Rogowski coil and a conversion circuit unit for detecting the amount of current in the circuit .

(Patent Document 1) USUS8487724 B2

However, as can be seen from FIG. 4 of Patent Document 1, the power transformer assembly of the circuit breaker according to the prior art has a structure in which the primary winding is wound around the core in the vertical direction so that the upward / downward extension of the core is limited, Resulting in a reduction in area, which causes a reduction in the power supply current obtained by the current flow.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a power transformer assembly for a circuit breaker that maximizes the area of a core to improve the efficiency of generating a power supply current.

It is an object of the present invention to provide a power transformer assembly for a circuit breaker,

A plurality of power converters provided in correspondence to the power circuit, for converting the power from the power circuit for each phase to supply the control power; A plurality of ROGOWSKI COILs for detecting currents flowing in the respective power circuits and corresponding to the power circuits; A rectifier circuit part electrically connected to a corresponding one of the plurality of power converters and a corresponding one of the plurality of Rogowsky coils for rectifying an output of the connected power rectifier and outputting a DC power source, A plurality of power transformer printed circuit boards each having a voltage dividing circuit section for voltage-regulating an output of the ski coil and outputting a voltage-controlled current detection signal; And an enclosure enclosing the plurality of power converters, the plurality of Rogowski coils, and the plurality of power deflector printed circuit boards, wherein each of the plurality of power deflectors includes a primary A power transformer core (CORE) having a first through hole formed in the upper portion and a second through hole portion formed in the lower portion to allow the winding to pass therethrough, a first through hole And a secondary winding wound in a second direction perpendicular to the second through-hole of the power transformer core. The power transformer assembly of the present invention can be achieved by providing a power transformer assembly of a circuit breaker according to the present invention.

According to a preferred aspect of the present invention, a power transformer assembly of a circuit breaker according to the present invention receives and directs the DC power source and the voltage-regulated current sense signal from each of the plurality of power deflector printed circuit boards, And a connector having an output connection portion or an output connection pin portion formed in a vertical direction so as to be vertically connectable.

According to another preferred aspect of the present invention, the enclosure is integrally formed and has a closed front wall portion, two side wall portions and an open rear face, the plurality of power converters, the plurality of Rogowski coils, One storage case for housing all of the plurality of power deflector printed circuit boards; And a plurality of covers covering the opened rear surface of the storage case.

According to another preferred aspect of the present invention, the storage case is provided with a plurality of horizontal (vertical) horizontal portions formed at the side of the position of the power transformer core in which the first through hole is provided so as to allow the primary winding to pass therethrough. And a channel portion.

According to another preferred embodiment of the present invention, the storage case includes a power transformer corresponding to a PHASE OF ELECTRIC POWER, a plurality of storage spaces for storing the Rogowski coil and the power transformer printed circuit board, And an intermediate partition wall which vertically blocks both side walls of the storage case and the both side walls so as to form a part.

According to another preferred aspect of the present invention, the storage case is provided in the corresponding compartment, and determines and supports a mounting position of the power transformer core and the Rogowski coil, Further comprising a plurality of support pipe portions having through-holes formed in the front-rear direction of the storage case to allow penetration therethrough.

According to another preferred aspect of the present invention, the primary winding is constituted by lead wires passing through the through-holes of each of the support tube portions twice.

According to another preferred aspect of the present invention, each of the plurality of support pipe portions is formed so as to be laterally offset from the central axis line of the corresponding accommodating space portion to one side.

According to another preferred aspect of the present invention, each of said power transformer cores is composed of an alphabet B type core having a first through hole portion and a second through hole portion, and the upper and lower portions are asymmetric.

According to another preferred aspect of the present invention, the cover includes a connector cover portion covering a front portion and a part of an upper portion of a connector for receiving and delivering the DC power from the power transformer printed circuit board and the voltage- .

According to another preferred aspect of the present invention, the power transformer assembly receives and supplies the DC power source and the voltage-regulated current-sense signal from each of the plurality of power converter printed circuit boards, Further comprising a plurality of connectors each having an output connection portion or an output connection pin portion formed in a vertical direction so as to be fixed and vertically connectable to each other, wherein the line for transmitting the DC voltage and the voltage- The cover includes a transparent window formed in front of a lower end of the connector.

In the power transformer assembly of the circuit breaker according to the present invention, since the primary winding is wound horizontally on the power transformer core, a space for extending the power transformer core in the vertical direction (upward) is secured, It is possible to maximize the area and improve the generation efficiency of the power supply current.

In the power transformer assembly of the circuit breaker according to the present invention, since the connector has the output connection portion or the output connection pin portion formed in the vertical direction so as to be fixed to the upper portion of the housing and vertically connectable thereto, The connector can be directly connected to the printed circuit board and the header of the main controller circuit board, which determine whether the circuit breaker trips or not, or the connector or the connector, so that the connector extension line is unnecessary, It is possible to reduce the manufacturing cost of the power transformer assembly by the cost of the connector extension line and to use the upper portion of the enclosure as a space for other functional units.

In a power transformer assembly of a circuit breaker according to the present invention, the enclosure is integrally formed and has a closed front wall portion, both side wall portions and an open rear wall, and the plurality of power transformers and a plurality of Rogowski A storage case for housing both the coil and the plurality of power deflector printed circuit boards; And a plurality of covers covering the opened rear surface of the storage case, so that there is a separate enclosure for each of the power transformer, the Rogowski coil, and the power transformer printed circuit board, It is possible to maximize the area of the power transformer core, thereby improving the generation efficiency of the power supply current.

In the power transformer assembly of the circuit breaker according to the present invention, the storage case includes a plurality of horizontal channel portions formed at the side of the power transformer core at a position where the first through-hole is provided, It is possible to pass the primary winding through the horizontal channel portion and to easily wind in the horizontal direction.

In the power transformer assembly of the circuit breaker according to the present invention, since the storage case includes a plurality of insulating partition walls forming a plurality of storage space portions, a power transformer corresponding to each phase (pole), a Rogowski coil and a power transformer The printed circuit board can be electrically insulated for each phase and stored in the storage space portion.

In the power transformer assembly of the circuit breaker according to the present invention, the storage case further includes a plurality of support pipe portions provided in the corresponding storage space portion with through-holes formed in the front-rear direction of the storage case, And the mounting position of the Rogowskie coil, and allows a forward-backward penetration of the primary winding.

In the power transformer assembly of the circuit breaker according to the present invention, since the primary winding is constituted by the lead wire penetrating the through hole of each of the support tube portions twice, Since the current can be accommodated and wound twice, it is possible to induce a larger magnetic field to the core in comparison with the single winding configuration.

The power transformer assembly of the circuit breaker according to the present invention is characterized in that the plurality of support tube portions are each formed in one side from the central axis line of the corresponding accommodating space portion, And the upper portion of the power transformer core can be supported by the support tube portion by fitting the support tube portion into the upper penetrating hole portion of the power transformer core by matching with the spherical portion.

In the power transformer assembly of the circuit breaker according to the present invention, each of the power transformer cores is composed of an alphabet B type core having a first through hole portion and a second through hole portion, and the upper and lower portions are formed in an asymmetrical shape, The upper portion of the power transformer core formed by one side from the central axis line is matched with the upper portion of the power transformer core to fit the support tube portion to the upper first penetration portion of the power transformer core, So that it can be supported by the support tube portion.

In the power transformer assembly of the circuit breaker according to the present invention, the cover includes a connector cover portion covering the front surface and the upper portion of the connector, so that the front surface and a part of the top surface excluding the connector hole or the connector pin portion A shielding effect can be obtained.

In the power transformer assembly according to the present invention, since the cover includes a transparent window formed in front of a lower end of the connector, the cover and the DC power source are connected to each other by a line (signal line / power line Can be visually confirmed through the transparent window portion.

1 is a front view of an assembly of a power transformer core and a secondary winding in a power transformer assembly according to an embodiment of the present invention,

Fig. 2 is a perspective view of Fig. 1,

Figure 3 is a perspective view of an enclosure of a power deflector assembly in accordance with a preferred embodiment of the present invention,

4 is a vertical cross-sectional view illustrating the internal structure of a lower portion of a power transformer assembly according to a preferred embodiment of the present invention,

FIG. 5 is a diagram illustrating a winding symbol for simplifying a configuration in which a primary winding of a power transformer assembly according to an exemplary embodiment of the present invention is wound,

6 is a perspective view showing a process of assembling a power transformer assembly according to a preferred embodiment of the present invention. FIG. 6 is a perspective view showing a state in which the assembly of a transformer nose and a secondary winding is assembled to a storage case of an enclosure, A coil, a connector, and a power transformer is a perspective view showing a state in which the printed circuit board is assembled to a storage case and the rightmost side shows a state in which the cover is closed to the storage case.

Figure 7 is a rear view of a power deflector assembly in accordance with a preferred embodiment of the present invention with complete assembly assembly completed,

Figure 8 is a front view of a power deflector assembly in accordance with a preferred embodiment of the present invention with complete assembly assembly completed,

FIG. 9 is an operational state view showing a state immediately before the PCB header of the main board of the control unit of the circuit breaker is connected to the connector of the power transformer assembly according to the preferred embodiment of the present invention shown in FIG. 7 or FIG. 8,

10 is an operational state view showing a state in which a PCB header of a control unit main board of a circuit breaker is connected to a connector of a power transformer assembly according to a preferred embodiment of the present invention shown in FIG. 7 or FIG. 8,

11 is a perspective view of a trip mechanism assembly of a circuit breaker showing a state in which a terminal cover is mounted on a power transformer assembly according to a preferred embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will be more clearly understood from the following description of a power transformer assembly of a circuit breaker according to a preferred embodiment of the present invention, It will be possible.

A power transformer assembly of a circuit breaker in accordance with a preferred embodiment of the present invention includes a plurality of power converters 10, a plurality of ROGOWSKI COILs 20, The power transformer printed circuit board 30 and the enclosure 40 of Fig.

A plurality of power converters (10) convert power from a power circuit for each phase to supply control power.

According to a preferred embodiment, the circuit breaker is a circuit breaker and the power circuit for each phase is R phase, S phase, T phase. That is, a three-phase AC power circuit.

A plurality of power converters 10 are provided corresponding to the power circuit. Therefore, the power transformer 10 installed in the circuit breaker for the three-phase AC power circuit can be composed of three.

Since the rated voltage of the circuit breaker is several hundred volts (V), that is, the phase voltage of the power circuit to which the circuit breaker is connected is several hundred volts and the control power required by the control unit of the circuit breaker is only a few volts (V) ) May be composed of a current transformer for reducing the phase voltage of the power circuit to a small voltage of several volts.

The plurality of power converters 10 are each configured to include one power transformer core 1, a primary winding 2, and a secondary winding 3.

1 and 2, each of the power transformer cores 1 includes a first through-hole portion 1c on the upper side and a second through-hole portion 1d on the lower side. Core.

Each of the power transformer cores 1 has a configuration feature that the upper portion 1a and the lower portion 1b are asymmetric.

In each of the power transformer cores 1, the primary winding 2 passes through the upper first through-hole portion 1c and is wound around the upper portion 1a of the power transformer core 1, The secondary winding 3 passes through the second through-hole portion 1d and is wound around the lower portion 1b of the power transformer core 1.

According to a preferred aspect of the present invention, the primary winding 2 is a through hole (refer to FIG. 3 or FIG. 3) of each of the support pipe portions And a lead wire (LEAD WIRE) which passes through the lead wire twice (see an indication of a reference numeral 42a in Fig. 6).

The primary winding 2 is connected between the outer terminal and the inner terminal between the outer terminal (see the reference numerals Ta, Tb and Tc in Fig. 9 or 10) of the circuit breaker and the inner terminal (see Ta1, Tb1 and Tc1 in Fig. As shown in FIG.

Here, the connection between the outer terminal and the inner terminal and the primary winding 2 may be formed by spot welding.

According to a preferred aspect of the present invention, the outer terminal, the inner terminal, and the primary winding (2) are directly connected by spot welding, and a separate electrode for connecting the outer terminal and the inner terminal to the primary winding The connection member (see "terminal brace 118A, 118B, 118C" in Patent Document 1) has an unnecessary configuration.

Since the external terminals Ta, Tb and Tc are connected to the load side or the power source side of the external power circuit through electric wires or the like, the primary terminals of the primary windings Ta, Tb and Tc are electrically connected to external power circuits of rated voltage and rated current, (2) is preferably made of a lead wire having a larger diameter than the secondary winding (3).

The support tube portion 42 and the through-hole 42a are formed in the front-rear direction in the housing case 40a of the enclosure 40 so as to allow the primary winding 2 to pass in the horizontal direction.

The reason that the primary winding 2 passes through the through-hole twice (see the indication portion 42a in FIG. 3 or 6) is that the primary winding 2 is wound twice through the through- So that a larger magnetic field can be induced to the power transformer core 1 in comparison with the single winding configuration.

7, the outer terminals Ta, Tb and Tc are connected to the outer terminal base portion 10b for providing a base plate portion for supporting and fixing the outer terminals Ta, Tb and Tc, (Not shown) for fixing the outer terminals Ta, Tb, and Tc to the cover 40b can be inserted into the outer terminal fixing portions (Ta2-1, Tb2-1, Tc2-1) (Ta2, Tb2, Tc2).

8, the inner terminals Ta1, Tb1, and Tc1 include inner terminal base portions Ta1-1 and Tb1-1 that provide a substrate portion for supporting and fixing the inner terminals Ta1, Tb1, and Tc1, And Tc1-1 which allow the inner terminals Ta1, Tb1 and Tc1 to be inserted into the storage case 40a to be described later and the inner terminal fixing holes Ta1-2 , Tb1-2, Tc1-2).

(Not shown) of the power circuit to which the circuit breaker is connected can be connected to the external terminals Ta, Tb, and Tc as described above, An internal load side or a power source side stationary contact arm may be connected.

A movable contact arm inside the circuit breaker is connected to the fixed contact by driving of a well known switching mechanism so that the circuit breaker is ON and the power circuit connected to the circuit breaker (TRIP) state or an OFF state and the power circuit connected to the circuit breaker is in the open state as the movable contact is separated from the fixed contact by the driving of the opening / closing mechanism do.

5, the primary winding 2 starts from the spot welding portion of the outer terminals Ta, Tb, and Tc and is primarily connected to the support tube portion 42 (Refer to the indication portion 42a in Fig. 3 or 6) of the storage case 40a formed at the right adjacent position in the drawing of the support pipe portion, 3) through the channel sphere 43a1-1 of the support tube portion 43a1 and then through the through hole of the support tube portion secondly and then to the inner terminals Ta1, Tb1, Tc1 by spot welding do.

As can also be seen from Figures 1, 2, 4 or 6, as also described above, the secondary winding 3 passes through the second through-hole 1d of the power transformer core 1 Is wound around the lower portion 1b of the power transformer core 1 in the vertical direction.

The secondary winding 3 is wound around the bobbin 3a but the bobbin 3a penetrates through the second through portion 1d of the power transformer core 1 and is wound around the power transformer core 1, The secondary winding 3 penetrates through the second through hole 1d of the power transformer core 1 and is arranged around the lower portion 1b of the power transformer core 1 It turns out that you are winding in the direction.

On the other hand, the plurality of Rogowski coils 20 are provided in correspondence with the respective power circuits to detect currents flowing in the respective power circuits and provide current detection signals.

The Rogowski coil 20 may be replaced by another means for detecting the current, for example, a current transformer.

The Rogowski coil 20 may be composed of a ring shaper core and a coil COIL for outputting a current detection signal. Since the detailed configuration and the current detection principle are well known, detailed description will be omitted do.

According to the illustrated embodiment, three Rogowski coils 20 may be provided corresponding to the three-phase AC power circuit.

6, the annular core of each of the Rogowskie coils 20 is installed so as to be supported by the support pipe portion 42 so that the support pipe portion 42 of the storage case 40a passes therethrough.

The windings of the Rogowski coil 20 may be electrically connected to the power transformer printed circuit board 30 through signal lines not shown.

If the circuit breaker is a circuit breaker for R, S, T phase and N phase (four pole) circuit breaker, it is predicted that four Rogowski coil 20 can be provided.

On the other hand, a plurality of power deflector printed circuit boards 30 are each electrically connected to a corresponding one of the plurality of power converters 10 and a corresponding one of the plurality of Rogowsky's coils 20. That is, for example, the power transformer printed circuit board 30 for the R phase (pole) includes an R phase (pole) power transformer and a plurality of Rogowsky coils 20 among the plurality of power converters 10, (Pole) power transformer printed circuit board 30 is connected to an S phase (pole) power transformer and a plurality of Rogowski coils 20 among the plurality of power converters 10, And the power transformer printed circuit board 30 for the T phase is connected to the power transformer for the T phase (pole) of the plurality of power converters 10 and the power transformer for the T phase (pole) And is connected to the Rogowski coil for the T phase (pole) of the WuSki coil 20. [

A plurality of power deflector printed circuit boards (30) each include a rectifying circuit part for rectifying an output of the power transformer (10) connected thereto and outputting a DC power source, and a rectifier circuit part And a voltage dividing circuit for voltage-regulating the voltage signal proportional to the current amount of the circuit and outputting the voltage-adjusted current detection signal. The voltage adjustment may be performed, for example, by adjusting the output voltage of the Rogowski coil 20 Which means that the main control unit converts the voltage level into a level that can be processed.

The rectifying circuit section may be constituted by, for example, a diode bridge circuit, and the voltage dividing circuit section may be constituted by a resistor voltage dividing circuit composed of a plurality of resistors.

The current detection signal of each DC power supply output from the power transformer printed circuit board 30 can be transmitted to a connector 50 described later through a power supply line and a signal line.

On the other hand, the configuration of the enclosure 40 will be described with reference to Figs. 3, 4, 7, and 8. Fig.

The enclosure 40 accommodates the plurality of power converters 10, the plurality of Rogowski's coils 20 and the plurality of power defibrillator printed circuit boards 30.

According to a preferred aspect, the enclosure 40 may be formed of an artificial resin material having electrical insulation.

The enclosure 40 includes one storage case 40a and a plurality of covers 40b.

According to a preferred aspect of the present invention, the storage case 40a is integrally formed, and has a closed front wall portion, both side wall portions, and an open rear surface, and includes a plurality of power converters 10, Both the coil 20 and the plurality of power deflector printed circuit boards 30 are housed.

In accordance with this aspect, there is a separate enclosure for each assembly of the power transformer 10, the Rogowski coil 20, and the power transformer printed circuit board 30 for each phase and another enclosure The space can be ensured to maximize the area of the end of the power transformer core 1, thereby improving the generation efficiency of the power supply current.

The storage case 40a can be divided into an upper portion of the upper surface 45 and a lower portion of the upper surface 45 with reference to the upper surface 45 most visible in FIG.

Three signal line guide groove portions 45a and three sets of connector supporting wall portions 44 are provided on the upper portion corresponding to the AC three phases of the storage case 40a.

In the case where the circuit breaker is a four-pole circuit breaker, it is predictable that four sets of the signal line guiding groove portion 45a and four sets of connector supporting wall portions 44 are provided in the housing case 40a.

Three storage space portions 41, three SUPPORTING TUBE PORTION 42, three horizontal channel portions 43a1 and a plurality of insulating partition walls 43 are provided on the lower side of the storage case.

In the case where the circuit breaker is a circuit breaker for four-pole, it is predicted that four accommodating space portions 41, four support pipe portions 42, four horizontal channel portions 43a1 and a plurality of insulating partition walls 43 are provided .

Each set of signal line guide groove portions 45a is formed on a corner surface of the upper surface 45 of the storage case 40a close to the cover 40b.

Each of the three sets of the signal line guide groove portions 45a has a plurality of signal line guide channels.

The signal line guide groove portion 45a of each pair is connected to a DC power source output from the power transformer printed circuit board 30 corresponding thereto at least to guide at least two power source lines and signal lines, It can have four guide channels.

Each set of the three sets of connector supporting wall portions 44 has three wall portions for supporting the connector 50 on the right and left sides and the rear side of the connector 50. Each of the signal line guiding groove portions 45a of the upper surface 45 of the housing case 40a, And forms a sheet SEAT on which the corresponding connector 50 is to be mounted.

The three storage space portions 41 are provided with

intermediate partition walls

43a and 43b that block the upper surface 45 of the storage case 40a, the both side walls 43c and the both side walls 43c in the vertical direction Is formed by a plurality of insulating partition walls (43) and an inner bottom surface of the storage case (40a).

The three accommodating space portions 41 accommodate the power transformer 10, the Rogowski coil 20, and the power transformer printed circuit board 30 corresponding to the power phases of three phases.

The three support tube portions 42 are composed of a hollow cylindrical tube portion formed to extend from a predetermined position in the upper portion of the front wall of the storage case 40a to the open rear side of the storage case 40a.

The three support tube portions 42 determine and support the mounting position of the power transformer core 1 and the Rogowski coil 20 on the corresponding power.

That is, the three support tube portions 42 are fitted in the first through-hole portion 1c of the power transformer core 1 corresponding to the power to support the power transformer core 1, It is possible to support the Rogowski coil 20 by inserting the portion of the support tube portion 42 that penetrates through the one through hole portion 1c into the central through hole of the annular Rogowski coil 20. [

The three support tube portions 42 are provided in the corresponding storage space portion 41 and are provided with through holes 42a formed in the front and rear direction of the storage case 40a so as to allow penetration of the corresponding primary windings 2, .

3, the three support pipe portions 42 are formed side by side from one side (left side in Fig. 3) from the central axis line C1 of the corresponding storage space portion 41, as can be seen from Fig.

3, the center axial line C2 of the three support pipe portions 42 is connected to the central axis line C1 which divides the width d1 of the corresponding storage space portion 41, (Left side in Fig. 3).

The three horizontal channel portions 43a1 are formed on the side (right side in Fig. 3) of the position where the first through-hole portion 1c of the power transformer core 1 is installed in the storage case 40a, The channel portion 43a1 allows the corresponding primary winding 2 of the three primary windings 2 to pass therethrough.

Each of the horizontal channel portions 43a1 is formed in the front and rear direction of the storage case 40a and is formed with three channel windings 2 by forming channel holes 43a1-1 corresponding to the front and rear direction of the storage case 40a, To allow the corresponding primary winding 2 to pass through the corresponding channel opening 43a1-1.

The positions of the three horizontal channel portions 43a1 are also on the side (right side in Fig. 3) of the three support pipe portions 42 in the storage case 40a.

Therefore, the vertical height of the three horizontal channel portions 43a1 in the storage case 40a is substantially equal to the height in the vertical direction of the three support pipe portions 42. [

The plurality of insulating partition walls 43 together with the upper surface 45 of the storage case 40a and the inner bottom surface of the storage case 40a form three storage space portions 41 as described above.

According to the embodiment, the plurality of insulating partition walls 43 may be configured to include both side walls 43c and two pairs of

intermediate partition walls

43a and 43b.

The pair of

intermediate partition walls

43a and 43b are formed of a first intermediate partition wall 43a and a second intermediate partition wall 43b ).

The storage case 40a is provided with four screw holes 42a and 42b for allowing the screw threads of the coupling screws to be engaged with the upper and lower four corners of each of the three storage space portions 41 in order to engage the storage case 40a and the cover 40b. (SH).

6 or 7, each of the covers 40b provided for each phase covers the rear surface opened in each of the storage space portions 41 of the storage case 40a.

Each cover 40b includes an upper portion and a lower portion.

The upper portion of each cover 40b covers the upper portion of the storage case 40a with respect to the upper surface 45. The lower portion of each cover 40b covers the upper surface 45 of the storage case 40a Cover the lower part with reference.

The upper portion of the cover 40b has a connector cover portion 40b4 and a transparent window portion 40b3.

7 or 8, the connector cover portion 40b4 is formed corresponding to the connector 50 on the upper portion of the cover 40b, and covers the front portion and the upper portion of the connector 50. As shown in Fig.

The user can check (check) the connection state between the DC power source and the line (signal line / power line SL) for transmitting the voltage-adjusted current detection signal and the connector 50, Is provided in the lower portion adjacent to the connector cover portion 40b4 and is formed in front of the lower end of the connector.

The transparent window portion 40b3 may be formed as a simple rectangular opening according to a preferred embodiment, and it is also possible to separately attach a window formed of a transparent material such as glass according to another embodiment.

The lower portion of the cover 40b takes up most of the area of the cover 40b and has a body portion that covers the lower side of the storage case 40a, that is, each storage space portion 41. [

The body portion of the cover 40b includes a primary winding through-hole (not shown), a plurality of transparent window portions (not coded), a channel-corresponding groove portion (not coded), and a plurality of screw holes 40b1, 40b2.

The primary winding perforations are provided so as to communicate with the through holes 42a of the support pipe portion 42 corresponding to the support pipe portions 42 of the respective storage space portions 41, And a through hole 42a of the support tube portion 42 formed through the primary winding through-hole portion.

The plurality of transparent window portions (not coded) are opened at a central portion and a lower portion in the longitudinal direction of the body portion of the cover 40b so that the user can check the state of the line or the power transformer printed circuit board 30, .

The one channel corresponding groove portion is formed in the channel portion 43a1 of the horizontal channel portion 43a1 in correspondence with the horizontal channel portion 43a1 of the storage case 40a at one corner (right corner in the drawing) of the body portion of the cover 40b. Is a through hole which communicates with the channel 43a1-1 and allows the primary winding 2 to enter the channel sphere 43a1-1 of the horizontal channel portion 43a1 communicated through the channel corresponding groove portion.

In the cover 40b, the plurality of screw holes 40b1 and 40b2 include a first screw hole 40b1 and a second screw hole 40b2.

The first screw hole 40b1 is formed at four corner portions of the substantially rectangular cover 40b and is a screw hole allowing the passage of the screw for coupling the cover 40b and the storage case 40a.

Assembly of the storage case 40a and the cover 40b is performed by inserting a coupling screw not shown through a first screw hole 40b1 provided at upper, lower, left, and right corners of the cover 40b, Can be accomplished by screwing it into the bulb (SH).

The second screw thread portion 40b2 is a screw thread portion formed on both sides of the intermediate portion in the longitudinal direction of the cover 40b to allow screwing of the fixing screw for fixing the outer terminals Ta, Tb, Tc .

Assembly of the cover 40b and the outer terminals Ta, Tb and Tc can be performed by fixing the fixing screw to the outer terminal fixing portions Ta2, Ta, Tb, Tc of the outer terminals Ta, Tb, , Tb2, Tc2) and screwing it into the second threaded portion 40b2 of the cover 40b.

Meanwhile, the power transformer assembly 100 of the circuit breaker according to the preferred embodiment of the present invention further includes a connector (CONNECTOR) 50, as can be understood from FIGS. 6 to 8.

According to the embodiment, the three connectors 50 receive the DC power and the voltage-adjusted current detection signal from the corresponding power converter printed circuit board 30, MB.

The three connectors 50 have an output connection portion or an output connection pin portion formed in the vertical direction so as to be fixed to the upper portion of the enclosure 40, particularly, the storage case 40a.

The three connectors 50 are formed of an insulating resin material and have an input connecting conductor portion and an output connecting conductor portion for receiving and transmitting a signal or a power source outside the insulating resin material, Or an output connection pin portion and is configured as an output connection portion so as to be connected to a PCB header (Printed Circuit Board Header) (refer to reference character HD in FIG. 9) as a corresponding connector portion of the main control board MB .

6, the input connection conductor portions of each of the three connectors 50 are connected to the signal line / power line SL.

The signal line / power line SL is connected at one end to the input connection conductor portion of the connector 50 and at the other end to the power transformer printed circuit board 30. [

The signal line / power line SL transfers the current detection signal to the connected connector 50 in response to the DC power from the power transformer printed circuit board 30.

The signal line / power supply line SL may be configured to include two power supply lines for transmitting a direct current power according to an embodiment and two lines for transmitting a current detection signal for each phase.

9 to 10, the assembly and configuration of the magnetic trip device intermediate assembly 200 including the power transformer assembly 100 according to the present invention will be described.

The magnetic trip device intermediate assembly 200 includes the power transformer assembly 100 according to the present invention and a main control board MB and a sub control board SB.

The configuration of the power transformer assembly 100 is as described above.

9, the main control board MB includes three PCB header (HD) corresponding to the connector 50 of the power transformer assembly 100 at three portions below the printed circuit board Respectively.

If the circuit breaker is a 4-pole circuit breaker, it is anticipated that there will also be four PCB headers (HD).

The main control board MB receives the current detection signal from the connector 50 via the PCB header HD.

The main control board MB includes a main control circuit which is driven by the DC power supply and the main control circuit compares the current detection value of each phase indicated by the current detection signal with a reference value of whether or not the trip operation is performed .

The reference value of whether or not the trip operation is to be performed is, for example, 120% of the rated current as reference value (s) for determining occurrence of an accident current (fault current) such as an overcurrent or a short circuit current generated in the power circuit to which the circuit breaker is connected, And may be stored in advance in the memory included in the main control board MB.

The main control board MB outputs a trip control signal for a trip operation to a trip actuator (not shown) when the current detection value of the current indicated by the current detection signal is greater than or equal to a preset reference value of the stored trip operation can do.

The main control board MB may be configured to include a power source, a signal input / output unit, a control unit, and a memory.

The power supply unit supplies the DC power supplied from the connector 50 through the PCB header HD to the electric parts included in the main control board MB.

The signal input and output unit may receive signals such as the current detection signal from the connector 50 and signals such as a remote trip control signal received from the sub control board SB through the PCB header HD .

The signal input / output unit may output a trip control signal for a trip operation to the trip actuator (not shown) connected to the main control board (MB).

The trip actuator is operated by the trip control signal to output a mechanical output signal. The mechanical output signal activates a well-known opening / closing mechanism, not shown, for trip operation so that the movable contact is disconnected from the fixed contact, The power circuit may be automatically tripped.

The control unit may include, for example, a microcomputer or a microprocessor. When the phase current detection value indicated by the phase current detection signal is equal to or greater than a predetermined reference value and stored in advance, the trip actuator generates a trip control signal for a trip operation Can be output.

The memory may store a processing and control program previously stored in the control unit, and a reference value or a processing / calculation result value provided by the control unit.

The sub control unit board SB may be configured to include a communication unit as a circuit unit for receiving and transmitting the remote trip control signal from the outside and receiving and transmitting signals from other accessory devices.

On the other hand, the assembly of the main control board MB and the power transformer assembly 100 according to the present invention can be accomplished as follows.

Referring to FIGS. 9 and 10, the power transformer assembly 100, the main control board MB and the sub control board SB according to the present invention are prepared as described above.

The three connectors 50 of the power transformer assembly 100 are connected to the main control board 100 in a state where the power transformer assembly 100 is positioned at the lower position while the upper main control board MB is held by the hands of the assembling machine or the assembler, Assembling of the power transformer assembly 100 and the main control board MB can be accomplished by fitting down the corresponding three PCB header HD of the main PCB MB.

Assembly of the main control board MB and the sub control board SB is carried out by assembling a header provided on one side of the sub control board SB to one side of the main control board MB corresponding to the right side of the main control board MB, To the connection port provided in the housing.

Thus, the assembly of the magnetic trip device intermediate assembly 200 can be completed.

10, the magnetic trip device intermediate assembly 200 in which the power transformer assembly 100 according to the present invention, the main control board MB, and the sub control unit board SB are assembled is shown.

When the trip device cover 300a is covered on the upper part of the assembled magnetic trip device intermediate assembly 200, the final assembly 300 of the magnetic trip device as shown in FIG. 11 can be obtained.

11, only the lower power transformer assembly 100 is shown without the main control board MB and the sub control board SB being hidden by the trip device cover 300a.

The operation and effect of the power transformer assembly 100 according to the present invention constructed as described above will be described with reference to FIGS. 1 to 11. FIG.

It is assumed that the power transformer assembly 100 according to the present invention is installed in the circuit breaker and the power circuit is connected.

The current flowing from the power source side of the power circuit is transmitted through the primary terminals 2 and the inner terminals Ta1, Tb1 and Tc1 of the power transformer assembly 100 according to the present invention through the outer terminals Ta, Tb and Tc And flows to the load side of the power circuit through the fixed contacts, the movable contact, and the load side fixed contacts and the load side terminals not shown.

The current flowing in the primary winding 2 when the current flows in this way induces a magnetic field in the power transformer core 1 of the power transformer assembly 100.

Thus, the magnetic field generated in the power transformer core 1 induces a current in the secondary winding 3 provided at the lower portion of the power transformer core 1.

Thus, the current induced in the secondary winding 3 is converted into DC power through the rectifying circuit portion of the power transformer printed circuit board 30, and the DC power is supplied to the signal line / power line SL, the connector 50, And is supplied to the main control board MB through the header HD.

On the other hand, the current for each phase of the power circuit flowing in the primary winding 2 is detected by the Rogowski coil 20 and is supplied to the power transformer printed circuit board 30 through a signal line (not shown) Lt; / RTI >

Then, the voltage divider circuit of the power converter printed circuit board 30 converts the voltage of the current detection signal of the current detection signal to the voltage of the signal line / power line SL, the connector 50, And the PCB header HD to the main control board MB.

The main control board MB can output a trip control signal for a trip operation to a trip actuator which is not shown when the current detection value for each phase indicated by the current detection signal is equal to or greater than a preset reference value of the stored trip operation .

As described above, in the power transformer assembly 100 of the circuit breaker according to the present invention, since the primary winding 2 is wound in the horizontal direction to the power transformer core 1, the power transformer core 1 is wound in the vertical direction The upper end of the power transformer core 1 is secured, thereby maximizing the area of the power transformer core 1 and improving the generation efficiency of the power supply current.

1: power transformer core 1a: upper

1b: Lower part 1c: First through hole part

1d: the second through-hole portion

2: primary winding

3: secondary winding 3a: bobbin

10: Power transformer 20: Rogowski coil

30: Power transformer printed circuit board

40: enclosure 40a: storage case

40b: cover 40b1: first screw hole

40b2: second screw hole part 40b3: perspective window part

40b4: Connector cover part 41: Storage space part

42: Support tube part 42a:

43: insulating barrier rib 43a: first intermediate partition wall

43b: second intermediate partition wall 43c:

43a1: horizontal channel part 43a1-1: channel opening (CHANNEL OPENING)

44: connector supporting wall portion 45: upper surface

45a: signal line guide groove 50: connector

100: power transformer assembly 200: magnetic trip device intermediate assembly

300: Magnetic trip device final assembly

300a: Trip device cover C1: Center axis line (compartment space)

C2: Center axis line (supporting tube) HD: PCB header

MB: Main control board SB: Sub control board

SH: Screw thread SL: Signal line / Power line

Ta, Tb, Tc: outer terminals Ta1, Tb1, Tc1: inner terminals

Ta2, Tb2, Tc2: The outer terminal fixing part

Ta2-1, Tb2-1, Tc2-1: outer terminal base portion

Ta1-1, Tb1-1, Tc1-1: inner terminal base portion

Ta1-2, Tb1-2, Tc1-2: Inner terminal fixing part

Claims

A power transformer assembly of a circuit breaker,

A plurality of power converters provided in correspondence to the power circuit, for converting the power from the power circuit for each phase to supply the control power;

A plurality of ROGOWSKI COILs for detecting currents flowing in the respective power circuits and corresponding to the power circuits;

A rectifier circuit part electrically connected to a corresponding one of the plurality of power converters and a corresponding one of the plurality of Rogowsky coils for rectifying an output of the connected power rectifier and outputting a DC power source, A plurality of power transformer printed circuit boards each having a voltage dividing circuit section for voltage-regulating an output of the ski coil and outputting a voltage-controlled current detection signal; And

And an enclosure for housing said plurality of power converters, a plurality of Rogowski coils, and said plurality of power deflector printed circuit boards,

Each of the plurality of power converters includes a power transformer core (CORE) having a first through hole formed at an upper portion thereof and a second through hole portion formed at an upper portion thereof to allow a primary winding electrically connected to the phase- A primary winding wound in a horizontal direction in a first through hole of the power transformer core and a secondary winding wound in a vertical direction in a second through hole of the power transformer core, The breaker power transformer assembly.
The method according to claim 1,

And an output connection portion formed in a vertical direction so as to be vertically connected and vertically connected to the upper portion of the outer casing, Further comprising a plurality of connectors (CONNECTOR HOLE PORTION) or output connector pins (OUTPUT CONNECTING PIN PORTION).
The method according to claim 1,

The enclosure,

A housing having a closed front wall portion, two side wall portions and an open rear face integrally formed and housing both the plurality of power deflectors, the plurality of Rogowski coils and the plurality of power defibrillator printed circuit boards, case; And

And a plurality of covers covering the open rear side of the storage case. &Lt; Desc / Clms Page number 19 >
The method of claim 3,

The storage case may include:

And a plurality of horizontal channel portions formed laterally of the power transformer core at positions where the first through holes are provided to allow the primary windings to pass therethrough.
The method of claim 3,

The storage case may include:

A power transformer according to claim 1, characterized in that said power transformer corresponding to a power phase (PHASE OF ELECTRIC POWER) and a plurality of storage space portions for storing said Rogowski coil and said power transformer printed circuit board are formed between said both side walls And a plurality of insulating partitions having an intermediate partition wall vertically blocking the power barrier part of the circuit breaker.
6. The method of claim 5,

The storage case may include:

And a through hole formed in the front and rear direction of the storage case to allow the passage of the primary winding to be determined and supported by the power transformer core and the Rogowskie coil, &Lt; / RTI > further comprising a plurality of support tube portions.
The method according to claim 6,

Wherein the primary winding comprises a lead wire (LEAD WIRE) that passes through the through-hole of each of the support tube portions.
The method according to claim 6,

Wherein the plurality of support tube portions are formed so as to be sideways to one side from the central axis line of the corresponding accommodating space portion.
The method according to claim 1,

Each of said power transformer cores comprising an alphabet B core having a first through hole and a second through hole, wherein the top and bottom are asymmetric.
6. The method of claim 5,

The cover

And a connector cover portion covering a front portion and a top portion of a connector receiving and delivering the DC current from the power transformer printed circuit board and the voltage-adjusted current detection signal.
The method of claim 3,

The power transformer assembly includes:

And an output connection portion formed in a vertical direction so as to be vertically connected and vertically connected to the upper portion of the outer casing, Or an output connection pin portion,

Wherein the cover includes a transparent window formed in front of a lower end of the connector so as to confirm a connection state between the DC power source and the line for transmitting the voltage-adjusted current detection signal and the connector. Current transformer assembly.