KR102608952B1 - Electrical plant power supplying system for preventing surge and noise - Google Patents

Abstract

According to the present invention, a molded circuit breaker is built into an enclosure box and the input part is connected to a 440V AC power source to enable electrical conduction; A first terminal block having a configuration in which terminals 1-1 and 1-2 are respectively connected to the output of the molded circuit breaker, and terminals 1-3 are enclosure grounded; A transformer whose input terminal is connected to the 1-1 terminal and the 1-2 terminal of the first terminal block and which transforms the 440V voltage to 220V and outputs it to the output terminal; The 2-1 terminal and the 2-2 terminal are each connected to the output terminal of the transformer, and the 2-3 terminal is connected to the 2-2 terminal to enable electrical conduction, and the enclosure is grounded to ensure non-floating (Non- A second terminal block that is grounded in a floating (common ground) manner and provides a surge blocking function through equipotential grounding; A fuse connected in series to the 2-1 terminal of the second terminal block and the output terminal of the transformer to block overcurrent; An outlet connected to the 2-1 terminal and the 2-2 terminal of the second terminal block to enable electrical connection; An uninterruptible power supply device that is connected to an outlet and bypasses the input power when the load rises above a certain value and provides harmonic and noise blocking functions; And it is configured in parallel to the 2-6 terminal and the 2-7 terminal, which are electrically connected to the 2-4 terminal and the 2-5 terminal of the second terminal block, respectively, and provides a noise removal function by removing harmonics. An electric plant power supply system for surge and noise prevention including a harmonic blocking unit is provided.

Description

Electrical plant power supplying system for preventing surge and noise}

The present invention relates to an electric plant power supply system for surge and noise prevention. More specifically, in electric plants such as power systems and firefighting equipment including high-voltage AC motors, the output terminal of a transformer is connected to the L phase, N line-E phase. It is grounded in the form of a non-floating (common ground) method, and the UPS is connected to an outlet connected to the L-phase and N-line of the transformer. A wire-wound resistor and a harmonic capacitor are connected in parallel to the L-phase and N-line of the transformer. This is about an electrical plant power supply system for preventing surges and noise that can prevent abnormalities in electrical plant equipment components and enable stable operation by eliminating harmonics caused by surges and noise when driving a high-voltage AC motor. will be.

The international technical standards, IEC and ITU, and the Korean industrial standard, KSCIEC, recommend a common grounding method that ensures equal potential between the neutral or protective wire and each grounding part or ground. This is because the common grounding method is advantageous in protecting electrical and electronic communication facilities and various cutting-edge information facilities from lightning surges or other surges.

In general, the delta (Δ) connection power supply method adopts the independent grounding method, and the wye (Y) connection power supply method adopts the common grounding method. Most countries and developed countries around the world adopt the common grounding method. .

In the case of Korea, when the Korean industrial standard was revised to KSCIEC in 2005, it was revised to a common grounding method suitable for international technical standards, but until 2004, the independent grounding method was used while the wye connection power supply method was used.

However, most of the existing facilities have an independent grounding method in which the power grounding type 1 grounding, type 2 grounding (neutral point grounding), type 3 grounding, and special type 3 grounding are each independent, and power grounding, communication grounding, lightning protection grounding, and signal grounding are used independently. Because an independent grounding method is applied in which grounding, instrumentation grounding, etc. are independent, a potential difference occurs between the respective grounds.

In particular, electrical and electronic communication equipment and various advanced information equipment are suffering damage from lightning surges or various surges because the equal potential is not established between the neutral point ground (neutral line) or protection wire and each communication ground, lightning protection ground, signal ground, and instrumentation ground.

On the other hand, in the power supply system of electric plants such as power systems including high-voltage AC motors and firefighting equipment, when the output terminal of the transformer is grounded using an independent grounding method, the waveform of the voltage output from the transformer does not maintain the target waveform, a sine wave. As noise caused by surges is severely generated, abnormalities occur in components such as power systems and fire-fighting equipment, thereby deteriorating the operation performance of electric plants.

(Patent Document 0001) Registered Patent 10-1142280

(Patent Document 0002) Registered Patent 10-1526229

(Patent Document 0003) Registered Patent 10-2129250

(Patent Document 0004) Registered Patent 10-1333547

Therefore, the purpose of the present invention is to ground the output terminal of the transformer in the form of L-phase, N-line-E phase in electric plants such as power systems and firefighting equipment including high-voltage AC motors to provide a non-floating (common ground) method. The UPS is connected to an outlet connected to the L-phase and N-line of the transformer, and a wire-wound resistor and a harmonic capacitor are connected in parallel to the L-phase and N-line of the transformer to prevent harmonics caused by surge and noise when driving a high-voltage AC motor. The purpose is to provide an electric plant power supply system for preventing surges and noise, which can prevent abnormalities in electric plant equipment components and enable stable operation by eliminating .

Meanwhile, the purpose of the present invention is not limited to the purposes mentioned above, and other purposes not mentioned will be clearly understood by those skilled in the art from the description below.

According to the present invention, a molded circuit breaker is built into an enclosure box and the input part is connected to a 440V AC power source to enable electrical conduction; A first terminal block having a configuration in which terminals 1-1 and 1-2 are respectively connected to the output of the molded circuit breaker, and terminals 1-3 are enclosure grounded; A transformer whose input terminal is connected to the 1-1 terminal and the 1-2 terminal of the first terminal block and which transforms the 440V voltage to 220V and outputs it to the output terminal; The 2-1 terminal and the 2-2 terminal are each connected to the output terminal of the transformer, and the 2-3 terminal is connected to the 2-2 terminal to enable electrical conduction, and the enclosure is grounded to ensure non-floating (Non- A second terminal block that is grounded in a floating (common ground) manner and provides a surge blocking function through equipotential grounding; A fuse connected in series to the 2-1 terminal of the second terminal block and the output terminal of the transformer to block overcurrent; An outlet connected to the 2-1 terminal and the 2-2 terminal of the second terminal block to enable electrical connection; An uninterruptible power supply device that is connected to an outlet and bypasses the input power when the load rises above a certain value and provides harmonic and noise blocking functions; And it is configured in parallel to the 2-6 terminal and the 2-7 terminal, which are electrically connected to the 2-4 terminal and the 2-5 terminal of the second terminal block, respectively, and provides a noise removal function by removing harmonics. An electric plant power supply system for surge and noise prevention including a harmonic blocking unit is provided.

Therefore, according to the present invention, in electric plants such as power systems and firefighting equipment including high-voltage AC motors, the output terminal of the transformer is grounded in the form of L phase and N line-E phase to use a non-floating (common ground) method. The UPS is connected to an outlet connected to the L-phase and N-line of the transformer, and a wire-wound resistor and a harmonic capacitor are connected in parallel to the L-phase and N-line of the transformer to prevent harmonics caused by surge and noise when driving a high-voltage AC motor. can be removed to prevent abnormalities in electrical plant equipment components and enable stable operation.

Meanwhile, the effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a circuit diagram showing the circuit configuration of an electric plant power supply system for surge and noise prevention according to a preferred embodiment of the present invention;
Figure 2 is a diagram showing the circuit configuration of an outlet in the electric plant power supply system of Figure 1;
Figure 3 is a diagram showing the waveform of the voltage output from the transformer when driving the AC 4MW motor in a state in which the electric plant power supply system of Figure 1 is not applied; and
FIG. 4 is a diagram showing the waveform of the voltage output from the transformer when driving the AC 4MW motor when the electric plant power supply system of FIG. 1 is applied.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

As shown in FIGS. 1 to 4, the electric plant power supply system for surge and noise prevention according to a preferred embodiment of the present invention includes a molded circuit breaker (MJC) which is built into an enclosure box and whose input unit is connected to a 440V AC power supply to enable electrical conduction. 110), a first terminal having a configuration in which the 1-1 terminal 121 and the 1-2 terminal 122 are each connected to the output part of the molded circuit breaker 110 and the 1-3 terminal 123 is enclosure grounded. The input terminal is connected to the terminal block 120, the 1-1 terminal 121 and the 1-2 terminal 122 of the first terminal block 120, and a transformer 130 that transforms the 440V voltage to 220V and outputs it to the output terminal, The 2-1 terminal 141 and the 2-2 terminal 142 are each connected to the output terminal of the transformer 130, and the 2-3 terminal 143 is electrically connected to the 2-2 terminal 142. The second terminal block 140, which is grounded in a non-floating (common ground) manner through the enclosure grounded configuration in the wired state, provides a surge blocking function through equipotential grounding, and the second terminal block of the second terminal block 140 -A fuse 150 that is connected in series to the first terminal 141 and the output terminal of the transformer 130 to block overcurrent, and the 2-1 terminal 141 and the 2-2 terminal 142 of the 2nd terminal block 140. ), an uninterruptible power supply device (170) that is connected to the outlet (160) to enable electrical conduction, bypasses the input power when the load rises above a certain value and provides a harmonic and noise blocking function, and a second It is connected to the 2-4 terminal 144 and the 2-5 terminal 145, which are connected to the 2-1 terminal 141 and the 2-2 terminal 142 of the terminal block 140 to enable electrical conduction, respectively. The surge protection device 180, which blocks the surge, and the 2-6 terminals 146 connected to the 2-4 terminals 144 and 2-5 terminals 145 of the second terminal block 140 to enable electrical conduction, respectively. ) and a harmonic blocking unit 190 configured in parallel to the 2-7 terminal 147 to remove harmonics and provide a noise removal function.

The molded case circuit breaker 110 is built into an enclosure box and is a means to connect the input unit to the 440V AC power supply to enable electrical conduction. Since it can be composed of a known MCCB, detailed description is omitted, and more preferably, it is of ABS32c 2P 20A. It can have specifications.

In the first terminal block 120, the 1-1 terminal 121 and the 1-2 terminal 122 are respectively connected to the output of the molded circuit breaker 110, and the 1-3 terminal 123 is enclosure grounded. As a means having a configuration, since it may have a known configuration, detailed description will be omitted, and more preferably, it may have a specification of 4P 20A.

The transformer 130 is a means in which the input terminal is connected to the 1-1 terminal 121 and the 1-2 terminal 122 of the first terminal block 120 and transforms the 440V voltage to 220V and outputs it to the output terminal. Since it may have a configuration, detailed description is omitted, and more preferably, it may have a specification of 1P 440V/220V 2.5KVA.

In the second terminal block 140, the 2-1 terminal 141 and the 2-2 terminal 142 are respectively connected to the output terminal of the transformer 130, and the 2-3 terminal 143 is connected to the 2-2 terminal. It is a means of providing a surge blocking function through equipotential grounding by being grounded in a non-floating (common ground) manner through an enclosure grounded configuration while being connected to allow electrical conduction to (142), and has a known configuration. Therefore, detailed description is omitted, and more preferably, it can have a specification of 10P 20A.

Here, the first terminal block 120 and the second terminal block 140, the 1-1 terminal 121 and the 2-1 terminal 141, respectively, correspond to the L phase in the three-phase power supply and the 1-2 terminal block 140 The terminal 122 and the 2-1st terminal 141 correspond to the N line in the three-phase power supply, and the 1st-3 terminal 123 and the 2-3 terminal 143 correspond to the E phase in the three-phase power supply. In this case, the 1-3 terminal 123 is grounded to the enclosure, and the 2-3 terminal 143 is connected to the 2-2 terminal 142 to enable electrical conduction and is grounded to the enclosure.

Therefore, according to the first terminal block 120 and the second terminal block 140, the N line-E phase of the second terminal block 140 is connected and both the first terminal block 120 and the second terminal block 140 are enclosure grounded. It is grounded in a non-floating (common ground) manner and can provide a surge blocking function according to equipotential grounding.

Here, the N line and E phase of the first terminal block 120 are not connected to allow electrical conduction, but only the N line and E phase of the second terminal block 140 are connected to allow electrical connection, that is, only the secondary side of the transformer 130 is connected. The reason for grounding the N line-E phase is to prevent risks to other facilities that occur when the N line-E phase of the primary side is connected and grounded.

The fuse 150 is connected in series to the 2-1 terminal 141 of the second terminal block 140 and the output terminal of the transformer 130 as a means to block overcurrent, and may have a known configuration, so detailed description is provided. It is omitted, and more preferably, it is better to have the specifications of Diazed type 10A.

The outlet 160 is connected to the 2-1 terminal 141 and the 2-2 terminal 142 of the second terminal block 140 to enable electrical connection, thereby enabling connection of the uninterruptible power supply device 170. As shown in FIG. 2, the first wire 161 and the second wire 162 are respectively connected to the 2-1 terminal 141 and the 2-2 terminal 142 of the 2 terminal block 140. and a plug insertion port 165 connected to the first wire 161 and the second wire 162 through the first connection terminal 163 and the second connection terminal 164 and configured in parallel. there is.

Here, the first wire 161 and the second wire 162 correspond to the L phase and N line in the three-phase power supply, and at this time, the 2-2 terminal block 142 is connected to the 2-3 terminal block 143. As the wires are connected to enable electrical conduction, the second wire 162 also has a structure grounded to the enclosure.

Therefore, according to the outlet 160, the enclosure is grounded while the second connection terminal 164 of the plug insertion hole 165 is connected to the second terminal block 140 through the second wire 162 corresponding to the N line and the E phase. Through this, it is grounded in a non-floating (common ground) method together with the first terminal block 120 and the second terminal block 140, thereby providing a surge blocking function according to equipotential grounding.

Meanwhile, in the present invention, the outlet 160 is wired to enable electrical conduction to the 2-1 terminal 141 to the 2-3 terminal 143 of the second terminal block 140, as shown in FIG. In this case, the first wire 161 and the second wire 162, which are respectively connected to the 2-1 terminal 141 and the 2-2 terminal 142 of the second terminal block 140, A plug insertion port 165 is connected to the first wire 161 and the second wire 162 through the first connection terminal 163 and the second connection terminal 164, and a plurality of plug insertion ports 165 are configured in parallel. Non-floating (common ground) through a configuration in which electrical conduction is possible to the second connection terminal 164 and the enclosure is grounded while connected to the 2-3 terminals 143 of the second terminal block 140. A discharge resistor 167 and a harmonic condenser 168 are connected in parallel to the third wire 166, the first wire 161, and the second wire 162, which are grounded in such a way that they provide a surge blocking function through equipotential grounding. It includes a harmonic removal module 169 that removes harmonics and provides a noise removal function.

Here, the first wire 161, the second wire 162, and the third wire 166 correspond to the L phase, N line, and E phase in the three-phase power supply. At this time, the second wire 162 and the third wire 166 correspond to the L phase, N line, and E phase in the three-phase power supply. The three wires 166 are connected to the enclosure to enable electrical conduction.

Therefore, according to the outlet 160, the second connection terminal 164 of the plug insertion hole 165 is connected to the second wire 162 and the third wire 166 corresponding to the N line and the E phase, and the third wire 166 ) is grounded in a non-floating (common ground) manner along with the first terminal block 120 and the second terminal block 140 through the enclosure being grounded, thereby providing a surge blocking function according to equipotential grounding.

The uninterruptible power supply device 170 is connected to the outlet 160 and is a means of bypassing the input power when the load increases above a certain value and providing a harmonic and noise blocking function, and may be configured to provide a compensation effect in the event of a power outage. there is.

As an example, the uninterruptible power supply device 170 is intended to supply stable power in the event of a system abnormality, and includes a storage battery that receives and stores power from the system power source and supplies the stored power to the load, and supplies power to the storage battery from the system power source. a bidirectional converter that stores and supplies the power stored in the storage battery to a load, an inverter that supplies the power stored in the storage battery to a load, connecting or disconnecting system power to a load or the bidirectional converter, and the bidirectional converter and the inverter A plurality of static switches connect or cut off the load, monitor the power status of the storage battery, and operate the bidirectional converter and the inverter in parallel to deliver power to the load, resulting in a capacity that is the sum of the capacities of the bidirectional converter and the inverter. It includes a control unit for total capacity, wherein in a charging mode, the grid power normally supplies power to the load, and also supplies power to the storage battery to charge it, and in a power reproduction mode, the power of the storage battery is supplied to the bidirectional converter and the inverter. is supplied to the load through, and at this time, the bidirectional converter serves as the inverter to supply power from the storage battery to the load, and in the discharge mode, the bidirectional converter and the inverter are operated in parallel to distribute the power of the storage battery equally to the load. Even when the inverter fails, power is supplied from the storage battery to the load through the bidirectional converter, and may include a current controller and a voltage controller to operate the bidirectional converter and the inverter in parallel.

Here, the uninterruptible power supply device 170 may more preferably have the specifications of SMT1500I.

The surge protection device 180 includes the 2-4 terminal 144 and the 2-4 terminal 144, which are electrically connected to the 2-1 terminal 141 and the 2-2 terminal 142 of the second terminal block 140, respectively. It is connected to the 2-5 terminal (145) as a means to block surges, and configures multiple bypass circuits to block high voltage and high current when electrical surges such as lightning occur, preventing fire and damage caused by surges and ensuring power supply. It can have a configuration that allows it to be maintained.

For example, the surge protection device 180 includes a plurality of bypass units installed between the input power line and the ground wire to protect the circuit by blocking electrical surges flowing through the input power line, and one of the plurality of bypass units. A switching signal is output to select a random bypass unit so that only one bypass unit is connected between the input power line and the ground line, and when a damage signal due to an electrical surge is input from the selected random bypass unit, the plurality of bypass units are switched. A control unit that outputs a switching signal to select the next-priority bypass unit so that the next-priority bypass unit forms a bypass circuit between the input power line and the ground line, and a control unit installed between the plurality of bypass units and the ground line a switching unit installed between the plurality of bypass units and the switching unit to connect the ground line to a random bypass unit selected from among the plurality of bypass units according to a switching signal output from the plurality of bypass units; It may include a switching detection unit that detects an arbitrary bypass unit connected to the ground line, and may further include a switching relay unit that supplies switching power to the switching unit according to a switching signal output from the control unit.

Here, the surge protection device 180 may more preferably have a specification of VPU II 1 280V/40KA.

The harmonic blocking unit 190 includes the 2-6 terminal 146 and the 2-6 terminal 146, which are electrically connected to the 2-4 terminal 144 and the 2-5 terminal 145 of the second terminal block 140, respectively. It is configured in parallel with the 2-7 terminals 147 to provide a noise removal function by removing harmonics, and may have a known discharge resistor 191 and a harmonic condenser 192, so a detailed description is omitted. Preferably, the discharge resistor 191 may have a specification of 4.7KΩ 10W and the harmonic condenser 192 may have a specification of AC 380V 10NF.

On the other hand, the electric plant power supply system for surge and noise prevention of the present invention is configured on the inner ceiling of the enclosure box and further includes fire extinguishing means to provide a fire extinguishing function by exploding when the internal temperature of the enclosure box is higher than a predetermined temperature. It is desirable to include it.

Here, the fire extinguishing means is a means that is configured on the inner ceiling of the enclosure box and provides a fire extinguishing function by exploding when the internal temperature of the enclosure box is higher than a predetermined temperature, and includes pressure gas and fire extinguishing agent accommodated inside the fire extinguishing case. .

Here, the pressure gas explodes while thermally expanding when the temperature inside the enclosure box rises to a predetermined temperature due to a fire caused by a surge, etc., causing the fire extinguishing agent to be ejected into the inner space of the enclosure box, and may have a known configuration. .

In addition, the fire extinguishing agent includes 20% by weight of ammonium carbonate, 10% by weight of ammonium chloride, 10% by weight of sodium silicate, 10% by weight of ammonium phosphate, 20% by weight of anhydrous soda, 10% by weight of fluorine-based surfactant, 10% by weight of oxygen adsorbent, and The smoke adsorbent may be composed of 10% by weight of chemical composition mixed together.

Here, the oxygen adsorbent may include CMS (Carbon Molecular Sieve).

Additionally, the smoke adsorbent may include one or more of zeolite, ion exchange resin, sepiolite, silica gel, alumina, molecular sieve, carbonaceous polymer resin, or diatomaceous earth.

Therefore, according to the fire extinguishing means, the fire extinguishing function is provided by the expansion of the pressure gas rather than being operated by the control of a separate fire control means, so when a fire occurs inside the enclosure box, the fire extinguishing function can be provided even if the fire control means does not operate. there is.

Meanwhile, the electric plant power supply system for surge and noise prevention of the present invention is designed to prevent overvoltage or overcurrent at the wiring portions of the molded circuit breaker 110, transformer 130, first terminal block 120, and second terminal block 140. It is preferable that a fire extinguishing sticker is attached to provide a fire extinguishing function in the event of a fire.

Here, the fire extinguishing sticker is composed of a base sheet, a first heat dissipation adhesive layer that is formed on one side of the base sheet and is attached to the wiring area of the components, that is, a fire hazard area and provides a heat dissipation diffusion function, and is attached to the other side of the base sheet. It consists of a second heat dissipation adhesive layer that is attached to the fire extinguishing sheet and provides a heat dissipation diffusion function, and one side of the second heat dissipation adhesive layer to quickly dissipate heat from areas at risk of fire and cover areas at risk of fire to extinguish fire in the event of a fire. Includes a fire extinguishing sheet that provides digestive function through the capsule.

The base sheet is a base member for forming the first heat dissipation adhesive layer and the second heat dissipation adhesive layer composed of different compositions, and is preferably made of a known synthetic resin or synthetic fiber having elasticity.

The first heat dissipation adhesive layer is a means of attaching to a fire risk area to quickly absorb heat and conduct it to the second heat dissipation adhesive layer. The first heat dissipation adhesive layer is a polymer mixed with a filler for heat conduction and a flame retardant to provide a heat dissipation diffusion function; The first heat dissipating adhesive, which provides an adhesive function by mixing a heat curing agent and a room temperature curing agent in a rubber type adhesive, is mixed at a predetermined volume ratio, for example, 1:1 to 2:1.

Here, in the first heat dissipation adhesive layer, the heat dissipation agent and the first heat dissipation adhesive are mixed at a volume ratio of 1:1 to 2:1. If it is outside the above range, the curing time and weight are adjusted after being adhered to a fire hazard area. Difficulty in controlling the average molecular weight causes cracks to occur due to poor curing, lifting, and deterioration of physical properties, and as a result, flame retardant performance deteriorates and thermal conductivity decreases. Therefore, it is good to have the above-mentioned critical significance.

The second heat dissipation adhesive layer is formed on the upper surface of the first heat dissipation adhesive layer and is a means to quickly absorb the heat transferred to the first heat dissipation adhesive layer and conduct it to the fire extinguishing sheet. The polymer is mixed with a heat conduction filler and a flame retardant to spread heat dissipation. A functional heat sink, a composite of PVC resin, polyoxyethylene alkyl ether and methyl oleate, N-2,4-dinitrophenylserine, benzyl chloroformate, water-based polyurethane thickener, and dicyclohexyl. A second heat dissipating adhesive mixed with urea, 1,1,2,2-tetrabromoethane, and dioctyl phthalate is mixed at a predetermined volume ratio, for example, 2:1 to 3:1.

Here, in the second heat dissipation adhesive layer, the heat dissipation agent and the second heat dissipation adhesive are mixed at a volume ratio of 2:1 to 3:1. If the volume ratio is outside the above range, the curing time is adjusted and the weight average molecular weight is adjusted after adhesion to the connection area. There is a problem in that the thermal conductivity is lowered due to cracks occurring due to poor curing, lifting, and deterioration of physical properties due to difficulties in controlling. Therefore, it is better to have the above-mentioned critical significance.

The fire extinguishing sheet is a means of providing a fire extinguishing function through a fire extinguishing capsule in the event of a fire by quickly dissipating heat from the area at risk of fire and covering the area at risk of fire, which is formed on one side of the second heat dissipation adhesive layer. It is an elastic sheet. It is preferable that it is a synthetic resin or synthetic fiber.

The fire extinguishing capsule may be adhered to the lower surface of the fire extinguishing sheet through a second heat dissipation adhesive layer, and may have a known configuration. For example, it may be composed of a polymer shell and core active fire extinguishing particles.

Here, the polymer shell is dissolved by mixing a composition containing a perfluorinated compound, gelatin, and silicon dioxide in a basic solvent, and the mixed solution is heated and stirred to obtain a uniform emulsion by mechanically dispersing the capsule composition in the basic solvent. It can be obtained by forming the outer wall of the capsule.

In addition, the core active fire extinguishing particles are inserted by applying a technology of inserting gas, liquid and solid into a polymer shell corresponding to a microcapsule with a powder material having a diameter of 3 to 5 micrometers, and hydrofluorofluoride produced from a halogen compound. Fires can be extinguished by suppressive cooling using carbon.

Meanwhile, it is preferable that the upper surface of the fire extinguishing sheet is coated with an oxygen adsorbent that adsorbs oxygen and a smoke adsorbent that adsorbs smoke through a molten coating agent.

Here, the melt coating agent may include a composition used in a known melt coating method.

Additionally, the oxygen adsorbent may include CMS (Carbon Molecular Sieve).

Additionally, the smoke adsorbent may include one or more of zeolite, ion exchange resin, sepiolite, silica gel, alumina, molecular sieve, carbonaceous polymer resin, or diatomaceous earth.

Therefore, when the molten coating is melted by heat from a fire, oxygen adsorbent is formed in the space of the enclosure box where the wiring parts of the molded circuit breaker 110, transformer 130, first terminal block 120, and second terminal block 140 are embedded. When exposed, oxygen inside the enclosure is instantly absorbed, preventing the fire from spreading outside the enclosure.

In addition, when the molten coating is melted by heat from a fire, the smoke adsorbent is exposed to the space of the enclosure box and the smoke inside the enclosure box is momentarily adsorbed, thereby preventing the smoke from spreading outside the enclosure box.

Therefore, according to the fire extinguishing sticker, when heat below the critical temperature set for the fire extinguishing function of the fire extinguishing capsule is transferred from the second heat dissipating adhesive layer, a heat dissipating function is provided to radiate to the outside, and the fire extinguishing capsule is extinguished from the second heat dissipating adhesive layer. If heat transfer exceeds the critical temperature set for function, the polymer shell may rupture and the core active extinguishing particle may provide extinguishing function.

Hereinafter, the operation of the electrical plant power supply system for surge and noise prevention having the above-described configuration will be described as follows.

First, the 1-1 terminal 121 and the 1-2 terminal ( 122) are each connected and the first to third terminals 123 are enclosure grounded.

Afterwards, the input terminal of the transformer 130 that transforms 440V to 220V is connected to the 1-1 terminal 121 and the 1-2 terminal 122 of the first terminal block 120, and the output terminal of the transformer 130 is connected. The 2-1 terminal 141 and the 2-2 terminal 142 of the second terminal block 140 are each connected, and the 2-3 terminal 143 is electrically connected to the 2-2 terminal 142. The enclosure is grounded in the wired state.

In this state, if the AC motor is connected to the 2-1 terminal 141, the 2-2 terminal 142, and the 2-3 terminal 143 of the second terminal block 140 to enable electrical connection and then driven, , the second terminal block 140 is grounded in a non-floating manner to provide a surge blocking function through equipotential grounding, so that some noise is generated at the output terminal of the transformer 130 during upward acceleration, constant speed, and downward deceleration of the AC motor.

Therefore, in order to improve the above problem, the 2-1 terminal 141 and the 2-2 terminal 142 of the second terminal block 140 are connected to the outlet 160, and the uninterruptible power supply device (uninterruptible power supply) is connected to the outlet 160. 170) is finalized.

When the AC motor is driven in this state, surge, harmonic, and noise blocking functions are provided by the uninterruptible power supply device 170, so that the waveform of the voltage output from the output terminal of the transformer 130 approaches the target waveform.

In addition, in order to make the waveform of the voltage output from the output terminal of the transformer 130 closer to the target waveform, the 2-4th terminal 144 and the 2-5th terminal 145 of the second terminal block 140 are connected to each other. The discharge resistor 191 of the harmonic blocking unit 190 and the harmonic condenser 192 are connected in parallel to the 2-6 terminal 146 and the 2-7 terminal 147, which are connected to enable electrical conduction.

When the AC motor is driven in this state, surge, harmonic and noise blocking functions are provided by the harmonic blocking unit 190, so that the waveform of the voltage output from the output terminal of the transformer 130 becomes closer to the target waveform.

In addition, the 2-4 terminal 144 and the 2-5 terminal 145 are connected to the 2-1 terminal 141 and the 2-2 terminal 142 of the second terminal block 140 to enable electrical conduction, respectively. ), when the surge protection device 180 is connected, the waveform of the voltage output from the output terminal of the transformer 130 becomes closer to the target waveform more stably.

Therefore, according to the above-mentioned, in electric plants such as power systems and firefighting equipment including high-voltage AC motors, the output terminal of the transformer 130 is grounded in the form of L phase, N line-E phase, and non-floating (common). It is configured in a grounding method and the uninterruptible power supply device 170 is connected to the outlet 160 connected to the L phase and N line of the transformer 130, and a discharge resistor 191 is connected to the L phase and N line of the transformer 130. By connecting the harmonic condenser 192 in parallel, harmonics caused by surge and noise are removed when driving a high-voltage AC motor, thereby preventing abnormalities in electrical plant equipment components and enabling stable operation.

In the above-described invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the invention. Therefore, the scope of the invention should not be determined by the described embodiments, but by the scope of the claims and their equivalents.

Claims (6)

A molded circuit breaker (110) built into the enclosure box and connected to the 440V AC power supply so that the input part can be electrically connected; A first terminal block 120 having a configuration in which the 1-1 terminal 121 and the 1-2 terminal 122 are each connected to the output of the molded circuit breaker 110 and the 1-3 terminal 123 is enclosure grounded. ); A transformer 130 whose input terminal is connected to the 1-1 terminal 121 and the 1-2 terminal 122 of the first terminal block 120, transforms the 440V voltage to 220V and outputs it to the output terminal; The 2-1 terminal 141 and the 2-2 terminal 142 are each connected to the output terminal of the transformer 130, and the 2-3 terminal 143 is electrically connected to the 2-2 terminal 142. A second terminal block 140 that is grounded in a non-floating (common ground) manner through an enclosure grounded configuration in a wired state and provides a surge blocking function through equipotential grounding; A fuse 150 connected in series to the 2-1 terminal 141 of the second terminal block 140 and the output terminal of the transformer 130 to block overcurrent; An outlet 160 connected to the 2-1 terminal 141 and the 2-2 terminal 142 of the second terminal block 140 to enable electrical connection; An uninterruptible power supply device (170) connected to the outlet (160) that bypasses the input power when the load increases above a certain value and provides a harmonic and noise blocking function; The 2-6 terminal 146 and the 2-7 terminal 147 are connected to the 2-4 terminal 144 and the 2-5 terminal 145 of the second terminal block 140 to enable electrical conduction, respectively. A harmonic blocking unit 190 configured in parallel to provide a noise removal function by removing harmonics; and a 2-4 terminal 144 and a 2-5 terminal 145 connected to the 2-1 terminal 141 and the 2-2 terminal 142 of the second terminal block 140 to enable electrical conduction, respectively. It includes a surge protection device 180 that is connected to and blocks surges,
The outlet 160 is,
The first wire 161 and the second wire 162, the first wire 161 and the second wire connected to the 2-1 terminal 141 and the 2-2 terminal 142 of the second terminal block 140, respectively. A plug insertion port 165 connected to the two wires 162 through the first connection terminal 163 and the second connection terminal 164 and configured in parallel, and a second connection terminal 164 of the plug insertion port 165. It is connected to enable electrical conduction and is connected to the 2nd-3rd terminal 143 of the second terminal block 140, and is grounded in a non-floating (common ground) manner through the enclosure grounded configuration to provide equipotential grounding. A discharge resistor 167 and a harmonic condenser 168 are configured in parallel on the third wire 166, the first wire 161, and the second wire 162, which provide a surge blocking function, to remove harmonics and reduce noise. Includes a harmonic removal module 169 that provides a removal function,
The harmonic blocking unit 190 is,
The 2-6 terminal 146 and the 2-7 terminal 147 are connected to the 2-4 terminal 144 and the 2-5 terminal 145 of the second terminal block 140 to enable electrical conduction, respectively. An electric plant power supply system for surge and noise prevention, characterized in that a discharge resistor (191) and a harmonic condenser (192) are connected in parallel. delete delete delete According to paragraph 1,
It further includes a fire extinguishing means configured on the inner ceiling of the enclosure box and providing a fire extinguishing function by exploding when the internal temperature of the enclosure box is higher than a predetermined temperature,
The means of extinguishing
An electric plant power supply system for preventing surges and noise, comprising pressurized gas and a fire extinguishing agent contained within a fire extinguishing case. According to paragraph 1,
A fire extinguishing sticker is attached to the wiring portion of the molded circuit breaker 110, transformer 130, first terminal block 120, and second terminal block 140 to provide a fire extinguishing function in the event of a fire due to overvoltage or overcurrent,
Fire extinguishing stickers,
A base sheet, a first heat dissipation adhesive layer formed on one side of the base sheet and attached to the wiring area of the components to provide a heat dissipation diffusion function, and a first heat dissipation adhesive layer formed on the other side of the base sheet and attached to the fire extinguishing sheet to provide a heat dissipation diffusion function. It includes a second heat dissipation adhesive layer and a fire extinguishing sheet that is formed on one side of the second heat dissipation adhesive layer to quickly dissipate heat in areas at risk of fire occurrence, cover areas at risk of fire occurrence, and provide a fire extinguishing function through a fire extinguishing capsule in the event of a fire. An electric plant power supply system for surge and noise prevention, characterized in that.

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