KR20190086151A - The energy saving type distribution board - Google Patents

Abstract

The present invention provides an energy saving typed distribution board capable of reducing electric energy outputted from a distribution board and saving the electric energy. According to the present invention, the energy saving typed distribution board comprises: a voltage measurement unit measuring voltage of an electric track of each phase; a current measurement unit measuring current of the electric track of each phase; a power measurement unit measuring power of the electric track of each phase; a power factor measurement unit measuring a power factor of the electric track of each phase; a harmonic wave analysis unit analyzing harmonic wave contents of the electric track of each phase; an energy reduction and harmonic wave attenuation unit attenuating the harmonic wave contents outputted from an air circuit breaker (ACB), and improving a flow of the current supplied to a load so as to reduce power consumption; a harmonic wave filter second-attenuating a harmonic wave when the harmonic wave, which is equal to or greater than a predetermined level, is detected from the harmonic wave analysis unit; and a monitoring unit receiving and displaying the voltage, current, power, power factor, and harmonic wave contents of the electric track of each phase.

Description

[0001] The present invention relates to an energy saving type distribution board,

The present invention relates to an energy saving switchboard, more particularly, to an electric power switchboard capable of reducing electric energy output from an switchboard, suppressing harmonic components output from the switchboard, and monitoring the power situation output from the switchboard in real time Energy-saving switchboard.

Generally, power distribution devices include integrated switchboards, general switchboards, special / high-voltage / transformer switches, and low-voltage switchboards.

The above-mentioned power distribution device is to be applied to the ratings of various facilities and equipments that actually use special high-voltage (extra-high voltage) electricity supplied to a home, a factory, a building, a hospital, an apartment complex Control and monitor the safe use of electrical facilities by converting them to a low voltage and rated capacity (high or low pressure) and supplying them to electrical facilities.

The power distribution apparatus includes an automatic section switch, a lightning arrester, a power fuse, a metering outfit, a transformer (Power Potential Transformer), a low voltage main breaker (Main Circuit Breaker), and a branch breaker (Distribution Breaker) are widely used.

On the other hand, the electric energy supplied to the electric equipment through the power distribution device is increasing in use every year, and the price of electric energy is also rising due to the increase of the price of fossil energy resources.

Accordingly, various efforts are being made to reduce electric energy in a socioeconomic manner.

Particularly, development of electric power saving device which can reduce power consumption, improvement of power transmission process, and power consumption is getting attention.

Japanese Patent Laid-Open Publication No. 4-261355 discloses a power saving method using far-infrared rays. In the power saving method using far-infrared rays, a ceramic ore radiating far- It is a technology to save electricity by suppressing the generation of resistive load due to heat generation of the motor.

An energy saving method is filed and registered in Korean Patent Publication No. 10-2002-0028862. The energy saving method is a method of supplying far-infrared rays radiated from a far infrared ray radiator such as a sericite or a manganese pyramid to an electric line, This is a way to save power by maximizing absorption.

However, both of the power saving method using the far-infrared rays and the energy saving method are required to generate far infrared rays of a certain wavelength band (8 to 11 um) as a method using far-infrared rays and the problem that the power saving effect is inferior when the amount of generated far- there was.

For example, when the sericite is pulverized and coated in a box of a certain size, the generated amount of far-infrared rays and the power saving effect are not satisfactory.

In addition, the conventional power distribution system generally adopts 3-phase 4-wire system. Due to the characteristics of the distribution system in Korea, the single-phase load and the 3-phase load are mixed and unbalanced current flows in the neutral line. Recently, And nonlinear load devices such as office equipment such as copiers, uninterruptible power supplies, and the like, will cause more image harmonics to flow through the neutral line.

In general, harmonics refers to a frequency corresponding to an integral multiple of the alternating electrical frequency, such as 2, 3, or 4 times the fundamental frequency, and is referred to as a distortion or distortion wave.

In particular, image harmonics are harmonic components corresponding to multiples of 3, such as 3, 6, 9, etc., among harmonics of various orders.

Since the image harmonics each have a phase value of three phases, image harmonics are superimposed and three times higher image harmonics flow as the three single-phase power sources are connected in parallel to the neutral line.

As such, excessive image harmonics in the neutral line cause problems such as overheating of the neutral conductor, degradation of the power distribution transformer, distortion of output voltage, communication line noise, and malfunction of electrical and electronic equipment.

Meanwhile, the prior art of the present invention is filed and registered with the patent registration number "10-1224324" under the heading " A power monitoring unit monitoring at least one of a power factor, and a frequency; An environment monitoring unit for monitoring at least one of a temperature of a transformer, a temperature of a switchboard, and a fire in a switchboard; A state monitoring unit for monitoring an operating state of at least one of a vacuum circuit breaker, an air circuit breaker, and a drain pump motor to monitor an operation state of the equipment related to the bus & An abnormality symptom monitoring unit for monitoring abnormality of the equipment related to the bus & bus system, and performing at least one of a lightning arrestor deterioration diagnosis and a CT secondary open diagnosis to monitor an abnormal symptom; A quality management unit for managing an operation quality of the equipment related to the bus & And a mobile communication terminal interlocking unit for controlling interworking with the mobile communication terminal for monitoring and controlling the equipment related to the server and the switchboard.

Korea Patent Registration No. 10-1224324 (2013.01.21) Korea Patent Registration No. 10-1313011 (2013.10.01) Korea Patent Registration No. 10-1668777 (October 26, 2014)

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an energy saving switchboard that can save electrical energy by reducing electrical energy output from a switchboard.

It is still another object of the present invention to provide an energy saving switchboard which can prevent damage or communication failure of an electric equipment that can be generated due to harmonics by suppressing harmonics output from the switchboard.

In order to achieve the above object, an energy saving switchboard according to the present invention is connected to an electric line between an ACB (Air Circuit Breaker) and a MCCB (Molded Case Circuit Breaker) in the switchboard, A voltage measuring unit for measuring a voltage of the battery; A current measuring unit connected to an electric line between an air circuit breaker (ACB) and a molded case circuit breaker (MCCB) in the switchboard and measuring a current of each phase electric line; (ACB) and a molded case circuit breaker (MCCB) by using a voltage measured through the voltage measuring unit and a current measured through the current measuring unit, A power measuring unit for measuring the power of the line; (ACB) and a molded case circuit breaker (MCCB) by using a voltage measured through the voltage measuring unit and a current measured through the current measuring unit. A power factor measuring unit for measuring a power factor of the electric line; The harmonic component of each phase electric line output from the electric line between the air circuit breaker (ACB) and the molded case circuit breaker (MCCB) is analyzed by analyzing the frequency component of the current measured through the current measuring unit Harmonic analysis section; It is connected to the electric line between the air circuit breaker (ACB) and the molded case circuit breaker (MCCB) in the switchboard to suppress the harmonic components output from the air circuit breaker and improve the current flow to the load, Energy saving and harmonic attenuation to save power; A harmonic filter (second harmonic filter) connected to an electric line between an air circuit breaker (ACB) and a molded case circuit breaker (MCCB) in the switchboard and second harmonics are attenuated when a harmonic over a predetermined level is detected from the harmonic analyzer ; And the voltage measuring unit and the electric line between the air circuit breaker (ACB) and the molded case circuit breaker (MCCB) from the current measuring unit, the power measuring unit, the power factor measuring unit and the harmonic analyzing unit, And a monitoring unit for receiving and displaying the voltage, current, power, power factor, and harmonic component of each phase electric line.

The energy saving switchboard according to the present invention having such a configuration can save electric energy by reducing electric energy output from the switchboard.

In addition, the present invention can suppress harmonics output from the switchboard, thereby preventing breakage or communication failure of the electrical equipment that may be generated due to harmonics.

1 is a control block diagram of the present invention,
2 is a perspective view of an energy saving and harmonic attenuator connected to a three-phase electric line,
3 is a longitudinal sectional view of the power saving device,
4 is a view showing a conductive plate provided inside the housing,
5 is a graph comparing the harmonic intensity before and after the installation of the harmonic attenuator,
6 is a control block diagram of the voltage measuring unit,
7 is a control block diagram of a voltage-side signal conditioner,
8 is a control circuit diagram of the voltage-side signal conditioner,
9 is a control block diagram of the current measuring unit.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, an energy saving switchboard according to the present invention includes an electric circuit between an air circuit breaker (ACB) and a molded case circuit breaker (MCCB) 5 in the switchboard A voltage measuring unit 9 connected to measure the voltage of each phase electric line; A current measuring unit 11 (current measuring unit) connected to an electric line between an air circuit breaker (ACB) and a molded case circuit breaker (MCCB) in the switchboard and measuring the current of each phase electric line ); An ACB (air circuit breaker) and a wiring breaker 5 (MCCB: Molded) are connected to each other using a voltage measured through the voltage measuring unit 9 and a current measured through the current measuring unit 11, A case circuit breaker) for measuring the power of each phase electric line output from the electric line; An ACB (air circuit breaker) and a wiring breaker 5 (MCCB: Molded) are connected to each other using a voltage measured through the voltage measuring unit 9 and a current measured through the current measuring unit 11, A power factor measuring unit 15 for measuring a power factor of each phase electric line output from the electric line between the power circuit and the case circuit breaker; The frequency component of the current measured through the current measuring unit 11 is analyzed and output from the electric line between the air circuit breaker 3 and the molded case circuit breaker 5 (MCCB: Molded Case Circuit Breaker) A harmonic analysis unit (17) for analyzing harmonic components of each phase electric line; And is connected to an electric line between an air circuit breaker (ACB) and a molded case circuit breaker (MCCB) in the switchboard to suppress harmonic components output from the air circuit breaker (3) An energy saving and harmonic attenuation unit 7 for reducing the power consumption by improving the flow of the supplied current; When a harmonic wave exceeding a predetermined level is detected from the harmonic analyzer 17 by being connected to an electric line between an air circuit breaker 3 (ACB) and a molded case circuit breaker 5 (MCCB) in the switchboard A harmonic filter (8) for attenuating the harmonic secondarily; And an ACB (Air Circuit Breaker) 3 from the voltage measuring unit 9, the current measuring unit 11, the power measuring unit 13, the power factor measuring unit 15 and the harmonic analyzing unit 17, A monitoring unit 19 for receiving and displaying the voltage, current, power, power factor and harmonic component of each phase electric line output from the electric line between the MCCB and the molded case circuit breaker 5, ≪ / RTI >

(ACB: Air Circuit Breaker) 3 transmitted from the voltage measuring unit 9, the current measuring unit 11, the power measuring unit 13, the power factor measuring unit 15 and the harmonic analyzing unit 17, Current, power, power factor, and harmonic component of each phase electric line output from the electric line between the main circuit breaker 5 and the MCCB (Molded Case Circuit Breaker) (Not shown).

The energy saving and harmonic attenuation unit 7 is installed in a three-phase electric line between an air circuit breaker (ACB) and a molded case circuit breaker (MCCB).

The air circuit breaker (ACB) 3 (ACB) is a device for preventing the occurrence of a short circuit or an overload by preventing the power supply to each user of the building in advance when a short circuit or an overload occurs.

The air circuit breaker 3 protects the low-voltage line and protects the transformer. The air circuit breaker 3 functions as a short-circuit breaker, a ground fault breaker, an overload current breaker, and a low-voltage breaker.

The air circuit breaker 3 distributes power supplied from the outside of the power distribution board through a power bus, usually without a short circuit or an overload.

The electric power bus is electrically connected to the energy saving and harmonic attenuator 7 through four, three, or two electric wires depending on whether the electric line is a three-phase four-wire system, a three-phase three-wire system or a single-phase two-wire system.

The circuit breaker (5) is a device for preventing a risk from occurring by preventing power supply before a supply of power distributed through a power bus to each user unit, that is, a load, when a risk arises due to a short circuit or an overload.

The circuit breaker (5) automatically cuts off the current when an abnormal condition such as overload or disconnection occurs to protect the low voltage indoor line of 250 V or less.

2, the energy saving and harmonic attenuation unit 7 includes an outer case 25 and an air circuit breaker 3 (ACB: Air Circuit Breaker 3) A power saving device 27 connected to the 3-phase electric line between the breaker 5 and the MCCB to improve the current flow of each phase electric line to reduce power consumption and attenuate harmonics, Is interposed between neighboring power saving devices (27) for lowering the potential difference between connected and adjacent power saving devices (27), and between the upper end of the power saving device (27) and the outer case (25) A ground plate 29 sandwiched between the lowermost end of the device 27 and the outer case 25 and a ground plate 29 sandwiched between the outer case 25 and the ground plate 29 to connect the outer case 25 and the ground plate 29 And an insulation plate 31 for insulation.

For example, the outer case 25 may be made of plastic, stainless steel, or a plated steel sheet. The outer case 25 is preferably made of a waterproof and dustproof material.

The power saving device 27 reduces the power consumption of the switchboard by improving the movement and flow of electrons by using permanent permanent magnet powder mixture with permanent electrical tourmaline mineral and permanent magnetism.

For example, if the electric line extending from the air circuit breaker 3 is a three-phase four-wire type, the power saving device 27 is connected to four electric power saving devices 27.

The ground plate 29 may be formed of a copper plate, an aluminum plate, or an iron plate. The ground plate 29 is installed between the four power saving devices 27 and at the top and bottom ends of the power saving device 27, Is connected to the connected ground line (G) so that the potential difference between adjacent power saving devices (27) is close to zero.

The insulating plate 31 is made of plastics or rubber in a plate shape and electrically insulates the ground plate 29 provided at the uppermost and lowermost ends of the power saving device 27 from the outer case 25.

The ground plate 29 is connected to the ground and the discharge amount of the free electrons is increased by the potential difference of the power saving device 27 to increase the effect of reducing the harmonics.

Also, since the power saving device 27 plays a role of canceling harmonics due to the characteristics of tourmaline, when the power saving device 27 is connected to the ground via the ground plate 29, harmonics generated in the power system are reduced in power consumption Device 27 and the harmonics are reduced by the electrical nature of the tourmaline.

That is, it is a polar crystal with an asymmetric dipole. It is an electrolytic electrolysis of tourmaline powder, which is the only material that has permanent electro-polarization characteristics in minerals, and continuously generates negative ions (electrons) Thereby increasing the density and mobility of the electrons and reducing the harmonics by rearranging the electrons by the magnetic field.

3, the power saving device 27 includes an inner case 33 and a tourmaline middle layer 35, which is a mixture layer of tourmaline powder, permanent magnet powder, and water contained in the inner case 33 An electrolytic plate 37 of a conductive metal located above and below the tourmaline intermediate layer 35 with the tourmaline intermediate layer 35 therebetween in the inside of the inside case 33, A capnit powder layer 39 made of a capnite powder located on the inner wall, and a conductive plate 41 embedded in the tourmaline intermediate layer 35.

The inner case 33 may be composed of a housing 43 and a lid 45 which can be separated from each other.

The housing 43 and the lid 45 may be joined by using soldering, welding, or an adhesive, or may be connected to each other by a screw at a position where the housing 43 and the lid 45 are in contact with each other.

It is most preferable that the cover 45 and the housing 43 are made of a PC / ABS plastic material. Since the PC / ABS plastic has a strength similar to that of iron and is a flame-retardant material, .

When plastic is used as the processing material of the lid 45 and the housing 43, the inner wall of the inner case 33 can be galvanized or the zinc paint can be painted when zinc plating is difficult. ) When painting a zinc paint on the inner wall, the thickness of the zinc paint is preferably 1 mm or less.

It is preferable that the joint between the lid 45 and the housing 43 when the lid 45 and the housing 43 are engaged is subjected to a silicone treatment so that the inside of the inner case 33 can be surely waterproof. When the lid 45 and the housing 43 are coupled with each other using screws, the lid 45 and the housing 43 may not be brought into close contact with each other.

The tourmaline intermediate layer 35 laminated to a predetermined thickness inside the inner case 33 is a mixture layer of tourmaline powder, permanent magnet powder, and water.

The tourmaline powder is an electrode formed at both ends of a powder crystal as polar crystals having electric polarization from the outside without applying an electric field from the outside. The positive electrode and the negative electrode of the tourmaline powder crystal are not always in an equilibrium state So that the electrons continuously flow from the negative electrode toward the positive electrode.

Accordingly, the tourmaline powder continuously generates a weak current, and when the tourmaline powder 35 comes into contact with the water contained in the tourmaline powder 35, the water is momentarily electrolyzed and electrons are generated.

Preferably, the permanent magnet powder can generate and maintain a stable magnetic field without receiving electric energy from the outside, and the magnetite powder is used as a raw material for the permanent magnet powder.

The permanent magnet powder helps tourmaline powder electrolyze water and then generate electrons.

The tourmaline powder and the permanent magnet powder are preferably powders of 325 mesh or more.

The upper part of the capstan powder layer 39 is a powder layer of a morganite mineral which releases 10 to 100 times more negative ions than ordinary minerals. And the lower hat knit powder layer 39 is laminated on the inner lower part of the inner case 33. [

로서 음이온을 다량 방출하는 성질을 가지고 있어 다양한 생활용품 등에 적용되는 광물질로서, 상기 모자나이트 원석은 방사선 방사 물질도 함께 함유하기 때문에 소성화를 거쳐 분말로 사용하고 325 메쉬의 분말 상태 또는 80 메쉬의 분말 상태로 사용한다.The above-mentioned capnite is a mineral which is contained in a lot of sand,

Which is used as a powder for various daily necessities and the like, and since the above-mentioned capstone orite contains radiation-emitting material, it is used as a powder after being subjected to plasticization, and a powdery state of 325 mesh or a powder of 80 mesh It is used in the state.

The capnite powder layer 39 indirectly contributes to improvement of electron movement and flow by the emission of negative ions.

The ionization plate 37 is positioned in the interior of the inner case 33 with the tourmaline intermediate layer 35 interposed therebetween and the upper ionization plate 37a is disposed between the tourmaline intermediate layer 35 and the upper hat- 39 and is separated from the housing 43 together with the lid 45 when the lid 45 is detached from the housing 43 of the inner case 33.

On the other hand, the lower ionization plate 37b is positioned between the tourmaline intermediate layer 35 and the lower capnit powder layer 39 and when the lid 45 is detached from the housing 43 of the inner case 33, (43).

Each of the upper and lower ionization plates 37a and 37b is made of a conductive metal such as copper or aluminum and each of the ionization plates 37 made of a conductive metal is in close contact with the tourmaline intermediate layer 35 and the capnite powder layer 39 And functions as both metal plates of the capacitor.

The electrons generated by the tourmaline intermediate layer 35 are charged by the role of a capacitor of the ionization plate 37 and then discharged to conduct the charge between the charge inside the apparatus and the external input terminal through the conduction plate 41.

It is preferable that the conductive plate 41 is embedded in the tourmaline intermediate layer 35 and the material thereof is copper (purity: 99.9%).

Although the conductive plate 41 may be buried in the tourmaline intermediate layer 35 containing water to cause oxidation due to moisture, the oxidation of the conductive plate 41 by moisture due to the reducing action of electrons transferred by the discharging action of the ionization plate 37 Is minimized.

Therefore, the oxidation of metal parts such as the conductive plate 41 accommodated in the power saving device 27 can be minimized, and the life of the device can be prolonged.

The electric wire 103 connecting the conductive plate 41 and the electric wire is not related to any electric wire 103 in the market but uses a wire 103 having a sufficient thickness and conforming to the safety standard.

The terminal 105 connecting the one end of the electric wire 103 and the conductive plate 41 is tightly tightened to prevent a gap from being opened.

The electric wire holder 107 uses the standard for the electric wire 103 and the inner moisture filled in the inner case 33 when the housing 43 of the inner case 33 is connected to the electric wire 103 is outside the inner case 33 Tightly with silicone or an adhesive so as not to escape to the outside.

5 shows the energy saving and harmonic intensity before and after the mounting of the harmonic attenuator 7. It can be seen that the harmonic intensity is remarkably reduced when the energy saving and harmonic attenuator 7 is mounted.

6, in order to measure a high voltage output from each phase electric line connected between the air circuit breaker 3 and the wiring breaker 5 in the distribution board, the voltage measuring unit 9 measures the voltage A measuring transformer 47 for converting high-voltage electricity output from each phase electric line into electric power of a low voltage proportional to high-voltage electricity; A voltage side signal conditioner 49 (Signal Conditioner) for amplifying a voltage output from each of the measuring transformers 47 and adjusting a DC voltage level output from the measuring transformer 47; A first A / D converter 51 for converting an analog signal output from each of the voltage-side signal conditioners 49 into digital data; And a voltage measurement control unit 53 for converting the digital data output from each of the first A / D conversion units 51 into voltage values output from the respective phase electric lines.

As shown in FIG. 7, the voltage-side signal conditioner 49 includes an amplifying unit 55 for amplifying a voltage output from the measuring transformer 47; A DC level adjusting unit 57 for adjusting a DC voltage level output from the amplifying unit 55; A signal attenuating preventing unit 59 for preventing a voltage output from the DC level adjusting unit 57 from being attenuated; And upper and lower voltage limiters 61 and 63 for limiting the upper and lower voltage output from the signal attenuator 59. [

배 증폭하는 제1 오피 앰프(65)(Opamp)로 이루어질 수 있다.8, one end of the amplifying unit 55 is connected to one of the secondary output terminals of the measuring transformer 47, and the other end of the amplifying unit 55 is connected to the inverting input of the first operational amplifier 65 A second resistor 69 having one end connected to the inverting input terminal of the first operational amplifier 65 and the other end connected to the output terminal of the first operational amplifier 65, A third resistor 71 connected to the other one of the secondary output terminals of the transformer 47 and the other end connected to the noninverting input terminal of the first operational amplifier 65, And a fourth resistor 73 connected to the inverting input terminal and grounded at the other end of the second resistor 69. The fourth resistor 73 is connected to the inverting input terminal and grounded. The output voltage of the measuring transformer 47 input to the first resistor 67 and the third resistor 71 is

And a first operational amplifier 65 (Opamp) for amplifying the amplified signal.

내지

범위 안에서 조정하는 제2 오피 앰프(77)로 이루어질 수 있다.As shown in FIG. 8, for example, the DC level adjusting unit 57 adjusts the DC level (+ V) and the negative DC voltage (-V) A fifth resistor 79 whose one end is connected to the voltage divider output terminal of the variable resistor 75 and the other end is connected to the inverting input terminal of the second operational amplifier 77 and the other end of which is connected to the second operational amplifier 77 And the other end of which is connected to the output terminal of the second operational amplifier 77. The output terminal of the amplifier 55 is connected to the non-inverting input terminal of the sixth resistor 81, ) According to the position of the tab of the variable resistor 75

To

And a second operational amplifier 77 that adjusts within a range.

As shown in FIG. 8, for example, the signal attenuator 59 is connected to an inverting input terminal and an output terminal, and outputs the output signal of the DC level adjusting unit 57 inputted through the non- And a third operational amplifier 83 for transferring the voltage to the voltage restricting portions 61 and 63.

8, the upper limit voltage limiting unit 61 includes a first diode 85 connected to an output terminal of the signal attenuating preventing unit 59 and an anode connected to the positive (+) terminal, And a positive (+) bias bias supply 87 connected to the cathode of the first diode 85 and a negative (-) pole grounded, so that the signal from the signal attenuator 59 The output voltage is limited so as not to exceed the sum voltage plus 0.7 V plus the plus voltage (+ V) output from the plus bias voltage supply 87.

As shown in FIG. 8, the lower limit voltage limiting unit 63 includes a second diode 89 having a cathode terminal connected to an output terminal of the signal attenuating prevention unit 59; And a negative bias supply unit 91 connected to the anode of the second diode 89 and grounded to the positive polarity, (-V) output from the negative bias voltage supply unit 91 is not lower than the sum voltage obtained by adding -0.7 V to the negative voltage (-V) output from the negative bias voltage supply unit 91. [

As shown in FIG. 9, the current measuring unit 11 is installed on each phase electric line to measure a high current output from each phase electric line connected between the air circuit breaker 3 and the wiring breaker 5 in the switchboard A measuring current transformer 93 for converting the high-current electricity output from each phase electric line into a low-current electric current proportional to the high-current electric current, and a measuring transformer 93 connected to the output terminal of each of the measuring transformers 93, A voltage converter 95 for converting a low current output from each of the measuring transformers 93 to a voltage proportional to a low current so as to measure a low current output from the measuring transformer 93, A current-side signal conditioner 97 (Signal Conditioner) for amplifying a voltage output from the converting unit 95 and adjusting a DC voltage level output from the voltage converting unit 95, A second A / D converter 99 for converting the analog signal output from the signal conditioner 97 into digital data, and a second A / D converter 99 for converting the digital data output from each of the second A / And a current measurement controller 101 for converting the current into a current value output from the line.

The harmonic analyzer 17 performs Fast Fourier Transform (FFT) on the current for each phase electrical line measured by the current measuring unit 11 to convert the current into each magnitude by the current frequency, Harmonic components can be analyzed.

The energy saving switchboard according to the present invention having such a configuration can save electric energy by reducing electric energy output from the switchboard.

In addition, the present invention can suppress harmonics output from the switchboard, thereby preventing breakage or communication failure of the electrical equipment that may be generated due to harmonics.

3. Air circuit breaker 5. MCCB
7. Energy saving and harmonic attenuation part 9. Voltage measuring part
11. Current measuring part 13. Power measuring part
15. Power factor measurement section 17. Harmonic analysis section
19. Monitoring department 21. Central management server
25. Outer case 27. Power saving device
29. Ground plate 31. Insulating plate
33. Inner case 35. Tourmaline middle layer
37. Ionization board 37a. Upper ionization plate
37b. Lower ionization plate 39. Capnite powder layer
41. Conductive plate 43. Housing
45. Cover 47. Measuring transformer
49. Voltage-side signal conditioner 51. First A / D conversion section
53. Voltage measurement control unit 55. Amplification unit
57. DC level adjustment unit 59. Signal attenuation prevention unit
61. High limit voltage limiter 63. Low limit voltage limiter
65. First Op Amp 67. First Resistor
69. Second resistor 71. Third resistor
73. Fourth resistor 75. Variable resistor
77. Second Op Amp 79. The fifth resistor
81. Sixth resistor 83. Third op amp
85. First diode 87. Positive bias voltage supply
89. Second diode 91. Negative bias voltage supply
93. Current transformer 95. Voltage conversion part
97. Current side signal conditioner 99. Second A / D conversion section
101. Current measurement controller 103. Wires
105. Terminal 107. Wire holder

Claims (3)

A voltage measuring unit 9 connected to an electric line between an ACB (Air Circuit Breaker) and an MCCB (Molded Case Circuit Breaker) in the switchboard and measuring the voltage of each phase electric line )Wow;
A current measuring unit 11 (current measuring unit) connected to an electric line between an air circuit breaker (ACB) and a molded case circuit breaker (MCCB) in the switchboard and measuring the current of each phase electric line );
An ACB (air circuit breaker) and a wiring breaker 5 (MCCB: Molded) are connected to each other using a voltage measured through the voltage measuring unit 9 and a current measured through the current measuring unit 11, A case circuit breaker) for measuring the power of each phase electric line output from the electric line;
An ACB (air circuit breaker) and a wiring breaker 5 (MCCB: Molded) are connected to each other using a voltage measured through the voltage measuring unit 9 and a current measured through the current measuring unit 11, A power factor measuring unit 15 for measuring a power factor of each phase electric line output from the electric line between the power circuit and the case circuit breaker;
The frequency component of the current measured through the current measuring unit 11 is analyzed and output from the electric line between the air circuit breaker 3 and the molded case circuit breaker 5 (MCCB: Molded Case Circuit Breaker) A harmonic analysis unit (17) for analyzing harmonic components of each phase electric line;
And is connected to an electric line between an air circuit breaker (ACB) and a molded case circuit breaker (MCCB) in the switchboard to suppress harmonic components output from the air circuit breaker (3) An energy saving and harmonic attenuation unit 7 for reducing the power consumption by improving the flow of the supplied current;
When a harmonic wave exceeding a predetermined level is detected from the harmonic analyzer 17 by being connected to an electric line between an air circuit breaker 3 (ACB) and a molded case circuit breaker 5 (MCCB) in the switchboard A harmonic filter (8) for attenuating the harmonic secondarily;
The air circuit breaker 3 (ACB: air circuit breaker) is connected to the voltage measuring unit 9, the current measuring unit 11, the power measuring unit 13, the power factor measuring unit 15 and the harmonic analyzing unit 17, A monitoring unit 19 for receiving and displaying the voltage, current, power, power factor, and harmonic component of each phase electric line output from the electric line between the MCCB (Molded Case Circuit Breaker) Made energy saving switchboard.
The method according to claim 1,
The energy saving and harmonic attenuation unit 7 includes an outer case 25,
And is connected to a three-phase electric line between an air circuit breaker (ACB) and a molded case circuit breaker (MCCB) 5 installed in the outer case 25, A power saving device 27 for reducing current consumption and reducing power consumption and attenuating harmonics,
Is connected between the adjacent power saving devices (27) to reduce the potential difference between neighboring power saving devices (27) connected to the ground line, and between the upper end of the power saving device (27) and the outer case A ground plate 29 sandwiched between the lowermost end of the power saving device 27 and the outer case 25,
And an insulating plate (31) sandwiched between the outer case (25) and the ground plate (29) to insulate the outer case (25) from the ground plate (29).
The method according to claim 1,
The voltage measuring unit 9 is mounted on each phase electric line to measure a high voltage output from each phase electric line connected between the air circuit breaker 3 and the wiring breaker 5 in the distribution board and output from each phase electric line A measuring transformer 47 for transforming high-voltage electricity into low-voltage electricity proportional to high-voltage electricity;
A voltage side signal conditioner 49 (Signal Conditioner) for amplifying a voltage output from each of the measuring transformers 47 and adjusting a DC voltage level output from the measuring transformer 47;
A first A / D converter 51 for converting an analog signal output from each of the voltage-side signal conditioners 49 into digital data;
And a voltage measurement control unit (53) for converting the digital data output from each of the first A / D conversion units (51) into a voltage value output from each phase electric line,
The current measuring unit 11 is installed on each phase electric line for measuring high currents output from each phase electric line connected between the air circuit breaker 3 and the wiring breaker 5 in the distribution board, A measuring current transformer 93 for converting the high-current electricity into a low-current electricity proportional to the high-current electricity;
A low current output from each of the measuring current transformers 93 is connected to an output terminal of each of the measuring current transformers 93 so as to measure a low current outputted from each of the measuring current transformers 93 A voltage conversion unit 95 for converting the voltage into a proportional voltage;
A current-side signal conditioner 97 (Signal Conditioner) for amplifying a voltage output from each of the voltage converting units 95 and adjusting a DC voltage level output from the voltage converting unit 95;
A second A / D converter 99 for converting an analog signal output from each of the current-side signal conditioners 97 into digital data;
And a current measurement control unit (101) for converting the digital data output from each of the second A / D conversion units (99) into current values output from the respective phase electric lines.

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