WO2024154997A1 - 배선용 차단기의 순시 트립 장치 - Google Patents
배선용 차단기의 순시 트립 장치 Download PDFInfo
- Publication number
- WO2024154997A1 WO2024154997A1 PCT/KR2024/000340 KR2024000340W WO2024154997A1 WO 2024154997 A1 WO2024154997 A1 WO 2024154997A1 KR 2024000340 W KR2024000340 W KR 2024000340W WO 2024154997 A1 WO2024154997 A1 WO 2024154997A1
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- WO
- WIPO (PCT)
- Prior art keywords
- load
- plate portion
- vertical plate
- heater
- power supply
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/14—Electrothermal mechanisms
- H01H71/16—Electrothermal mechanisms with bimetal element
- H01H71/164—Heating elements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/40—Combined electrothermal and electromagnetic mechanisms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/123—Automatic release mechanisms with or without manual release using a solid-state trip unit
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/02—Housings; Casings; Bases; Mountings
- H01H71/0207—Mounting or assembling the different parts of the circuit breaker
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
Definitions
- the present invention relates to an instantaneous tripping device for a molded circuit breaker, and more specifically, to an instantaneous tripping device for a molded case circuit breaker with improved blocking performance due to increased magnetic attraction.
- a molded case circuit breaker In general, a molded case circuit breaker (MCCB) is an electrical device that protects circuits and loads by automatically blocking the circuit in the event of an electrical overload or short circuit. Molded case circuit breakers are usually used in low-voltage systems.
- Molded case circuit breakers are largely divided into a terminal part that can be connected to the power side or a load side, a contact part that includes a fixed contactor and a movable contactor that connects or disconnects the circuit by contacting or separating it, and an opening and closing part that provides the power necessary to open and close the circuit by moving the movable contactor. It consists of a trip part that detects overcurrent or short-circuit current flowing in the mechanism and circuit and induces a trip operation of the opening/closing mechanism, and an arc extinguishing part to extinguish the arc that occurs when abnormal current is blocked.
- Fault current can be divided into various ways. Usually, a current exceeding 130% of the rated current is called an overcurrent, and a sudden current exceeding 10 times the rated current is called an instantaneous fault current. Additionally, sudden large currents, including instantaneous currents, are called short-circuit currents.
- a method of tripping a circuit breaker using a bimetal element is commonly used, and an instantaneous current of about 10 times the rated current is set on the conductor (heater) between the magnet and the armature.
- an instantaneous current of about 10 times the rated current is set on the conductor (heater) between the magnet and the armature.
- the molded circuit breaker includes an overcurrent trip device corresponding to the rated overcurrent and an instantaneous trip device corresponding to the instantaneous current.
- FIG. 1 shows a molded circuit breaker 1 according to the prior art
- FIG. 2 shows a trip unit (trip device) 10.
- a trip unit 10 is provided inside the enclosure 2 to detect abnormal current flowing in the circuit and trip the opening/closing mechanism.
- the trip unit 10 is usually provided on the load side.
- the trip unit 10 includes a heater 11 connected to the load side terminal 9, a bimetal (not shown) that is coupled to the heater 11 to detect heat and is curved according to the amount of heat, and a magnet installed around the heater 11. (13) and the armature 14, the crossbar 15 installed to rotate by contact with the bimetal or armature 14, and the nail of the opening and closing mechanism 20 that is restrained or released by the rotation of the crossbar 15 It may include a shooter (16) that restrains or releases (18).
- the crossbar 15 rotates to operate the opening/closing mechanism, and when a large current is instantaneously cut off, the bimetal is bent by the heat generated in the heater 11. As the armature 14 is sucked in, the crossbar 15 rotates to operate the opening and closing mechanism 20.
- Figures 3 and 4 show the operation of the instantaneous tripping device.
- a large fault current such as a short circuit current occurs on a circuit in which the molded circuit breaker (1) is installed
- an induced current is generated in the magnet (13)
- the armature (14) is drawn due to the attractive force caused by the magnetic field of the magnet (13). It is pulled and rotates by pushing the crossbar 15, and as a result, the shooter 16 rotates and the opening/closing mechanism 20 trips.
- the magnetic attraction force of the magnet 13 becomes greater than the tension of the instantaneous spring 12, so the armature 14 operates and operates the mechanical part to perform a tripping effect.
- the size of the magnet must be increased to increase the instantaneous attractive force, but due to space constraints, there is a limit to the size of the magnet that can be increased, thereby limiting the attractive force.
- Figure 5 shows a perspective view of a heater according to the prior art. The direction of the current flowing in the heater 11 and the direction of the magnetic field are shown. A magnetic field is formed according to the right-hand screw law centered on the current flowing in the heater.
- the present invention was devised to solve the above-mentioned problems, and its purpose is to provide an instantaneous tripping device for a molded circuit breaker that increases the instantaneous attraction force and allows the tripping operation of the armature to occur easily even at low ratings.
- An instantaneous tripping device for a molded circuit breaker includes a heater connected to a circuit; A magnet installed adjacent to the heater; and an armature that is rotatably installed and is attracted to the magnet when the magnet is magnetized, wherein a magnetic force groove is formed in the center of the heater, and the magnet is provided with a protrusion that is inserted into the magnetic force groove and protrudes toward the armature. do.
- the heater includes a power-side heater part connected to a power source side, a load-side heater part partially overlapping with the power-side heater part, and an insulating member interposed between the power-side heater part and the load-side heater part.
- the power supply side heater unit includes a power supply side connection terminal connected to the power supply side, a power supply side first vertical plate portion connected to the power supply side connection terminal and extending downward, a power supply side middle portion extending horizontally from the power supply side first vertical plate portion, and the power supply side. It includes a power-side coupling part connected to the middle part.
- the load-side heater unit includes a load-side coupling portion coupled to the power-side coupling portion, a load-side first vertical plate portion extending upward from the load-side coupling portion, a load-side middle portion extending laterally from the load-side first vertical plate portion, and It includes a load-side second vertical plate portion extending downward from the load-side middle portion and disposed in parallel with the load-side first vertical plate portion, a load-side flat plate portion bent and extending from the load-side second vertical plate portion, and a load-side terminal portion connected to the load-side flat plate portion.
- the width of the first vertical plate portion on the power source side is formed to be less than 1/2 of the width of the connection terminal on the power source side.
- the width of the load-side first vertical plate portion and the load-side second vertical plate portion is formed to be less than 1/2 of the width of the load-side flat plate portion.
- load-side second vertical plate portion and the power-side first vertical plate portion are arranged to overlap with the insulating member interposed therebetween.
- the magnetic force groove is formed between the first vertical plate portion on the load side and the second vertical plate portion on the load side.
- the insulating member includes an insulating vertical plate portion and an insulating horizontal plate portion.
- the magnet includes a fixing plate part fixed to the trip unit case and a protrusion that protrudes in a perpendicular direction from the fixing plate part and is inserted into the magnetic force groove.
- the heater is formed in a solenoid shape to generate a circular current. Therefore, the instantaneous suction force is strengthened by matching the direction of the magnetic field formed in the magnet with the direction in which the armature operates.
- the magnetic attraction force is increased by the protrusion of the magnet that matches the operating direction of the armature.
- the armature is allowed to operate within the instantaneous standard range even at low rated current.
- the heater is composed of a double plate of a power-side heater unit and a load-side heater unit coupled thereto, forming a circular current.
- An insulating member is interposed between the power-side heater unit and the load-side heater unit to ensure smooth flow of current between the double plates.
- Figure 1 shows a molded circuit breaker according to the prior art.
- Figure 2 shows a trip unit of a molded circuit breaker according to the prior art.
- Figures 3 and 4 are diagrams showing the operation of the instantaneous trip mechanism in the trip unit of a molded circuit breaker according to the prior art, with Figure 3 showing an energized state and Figure 4 showing a tripped state.
- Figure 5 shows a perspective view of a heater according to the prior art.
- Figure 6 shows a perspective view of a heater and magnet according to the prior art.
- Figure 7 is an internal cross-sectional view of a molded circuit breaker according to an embodiment of the present invention.
- Figures 8 and 9 are perspective views of a trip unit applied to a molded circuit breaker according to an embodiment of the present invention, viewed from different directions.
- Figure 10 is a perspective view of a heater and a magnet applied to the trip unit of a molded circuit breaker according to an embodiment of the present invention.
- Figure 11 is an exploded perspective view of Figure 10.
- Figure 12 is an exploded perspective view of the heater in Figure 10.
- Figure 7 shows an internal cross-sectional view of a molded circuit breaker according to an embodiment of the present invention.
- the instantaneous trip device of the molded circuit breaker 100 includes a trip unit case 280; A heater 210 installed in the trip unit case 280 and connected to a circuit; A magnet 250 installed adjacent to the heater 210; an armature 260 that is rotatably installed on the heater 210 and is attracted when the magnet 250 is magnetized; and a crossbar 270 that rotates under the action of the armature 260 to trip the opening/closing mechanism 125; Includes, a magnetic force groove 213 is formed in the center of the heater 210, and the magnet 250 is provided with a protrusion 254 that is inserted into the through groove and protrudes toward the armature 260.
- Enclosure 101 accommodates and supports the components of the molded circuit breaker.
- the enclosure 101 is roughly shaped like a box.
- a handle 127 is exposed on the upper surface of the enclosure 101.
- the handle 127 operates the opening and closing mechanism 125 by the user's manual manipulation force.
- Terminal portions 108 and 218 that can be connected to a power source or a load are provided on the front and rear sides of the enclosure 101. Terminal portions 108 and 218 are provided for each phase (or each pole). For example, in the case of a three-phase, four-pole molded circuit breaker, four terminal units may be provided on each of the power and load sides.
- the terminal portions 108 and 218 are composed of a power supply side terminal portion 108 and a load side terminal portion 218.
- a base assembly 102 is inserted and installed into the enclosure 101.
- the base assembly 102 has a built-in contact portion and an arc extinguishing portion.
- a base assembly 102 is provided for each phase. For example, in the case of three phases, it consists of R phase, S phase, and T phase.
- an opening and closing mechanism 125 is installed in the S-phase base assembly 102.
- Fixed contacts (120, 121) are fixedly installed inside the enclosure (101). Fixed contacts (120, 121) are connected to terminal portions (108, 218).
- fixed contacts 120 and 121 are provided on the power source side and the load side, respectively. That is, a power-side fixed contactor 120 and a load-side fixed contactor 121 are provided. At this time, the power-side fixed contactor 120 may be directly connected to the power-side terminal portion 108 or may be formed integrally with it.
- the load side fixed contact 121 may be connected to the load side terminal portion 218 through a trip mechanism (particularly the heater 210).
- An arc extinguishing unit (arc. extinguishing device) 105 is provided near the contact portion (fixed contactor and movable contactor) to extinguish the arc generated during interruption.
- the arc extinguishing unit 105 is provided on the power source side and the load side, respectively.
- the arc extinguishing unit 105 may be composed of a pair of side walls and a plurality of grids coupled to the side walls at predetermined intervals. The arc that occurs at the contact point is divided by a plurality of grids.
- a trip unit 200 is provided in a part of the enclosure 101 to detect abnormal current flowing in the circuit and trip the opening/closing mechanism.
- the trip unit 200 is usually provided on the load side.
- the trip unit 200 is installed around the heater 210 connected to the load side terminal 218, the bimetal 240 that is coupled to the heater 210 and curved according to the amount of heat, and the heater 210 to generate fault current.
- the magnet 250 that forms a magnetic field
- the armature 260 that is rotatably installed on the heater 210 and is attracted by the magnetic force of the magnet 250, rotates by contact with the bimetal 240 or the armature 260.
- It may include a crossbar 270 installed so as to be able to do so, and a shooter 275 that is restrained or released by rotation of the crossbar 270 to restrain or release the nail 118 of the opening and closing mechanism 125.
- the bimetal 240 is curved by the heat generated in the heater 210 and the crossbar 270 rotates to operate the opening/closing mechanism 125, and when a large current is instantaneously cut off, the magnet 250 is used.
- the armature 260 is attracted by the magnetic force excited to rotate the crossbar 270 to operate the opening and closing mechanism 125.
- the user's operating force is transmitted to the opening and closing mechanism 125 through the handle 127.
- a pair of rotating pins 104 are installed in the opening and closing mechanism 125.
- the rotating pin 104 is formed to have a length that crosses all phases and is installed on the shaft assembly (or mover assembly) 130.
- a shaft assembly 130 is provided.
- a rotating pin 104 is installed through the shaft assembly 130.
- the shaft assembly 130 rotates by receiving the opening and closing power of the opening and closing mechanism 125 through the rotation pin 104.
- the movable contact 140 also rotates to contact or separate from the fixed contacts 120 and 121.
- the shaft assembly 130 includes a shaft body 131, a movable contact 140, a shaft pin 165, and a spring 160.
- the movable contact 140 is inserted and installed into the opening 133 of the shaft body 131.
- the movable contactor 140 rotates counterclockwise or clockwise together with or independently of the shaft body 131 and contacts or separates from the fixed contactors 120 and 121 to energize or block the line.
- Both ends of the movable contact 140 are provided with movable contact points 141 that can be contacted with the fixed contact points 122 and 123 of the fixed contacts 120 and 121, respectively.
- the movable contact 141 may be made of a material with excellent conductivity and durability, such as chrome-copper (Cr-Cu) alloy.
- a fixing protrusion 142 on which one end of the spring 160 can be fastened is formed to protrude on the side of the movable contact 140.
- One end of the spring 160 is fixed to the fixing protrusion 142, so that the movable contact 140 receives a force that rotates counterclockwise in the drawing. Accordingly, the movable contact 140 remains inserted into the shaft body 131 by the elastic force of the spring 160 unless an external force acts.
- the movable contactor 140 rotates together with the shaft body 131 in a general low-current or large-current blocking situation, but when the current is blocked, the movable contactor 140 rotates independently due to a rapid electromagnetic repulsion force. In this case, the movable contact 140 comes into contact with the shaft pin 165 of the opening and stops rotating.
- a locking groove (not shown) that can be in contact with the shaft pin 165 may be formed on the back of the movable contact 140.
- the rotation of the movable contactor 140 can be divided into three cases.
- the first case when the user operates the handle 127 and the opening and closing mechanism 125 connected to the handle 127 rotates the shaft assembly 130, the movable contact 140 rotates together with the shaft body 131. am. That is, the movable contact 140 is restrained by the force of the spring 160 and moves together with the shaft body 131.
- the shaft assembly 130 includes the movable contact 140 and the shaft body 131 moving as one body.
- the restraint on the opening/closing mechanism 125 is released due to the operation of the trip unit 200 according to detection of the fault current, and the shaft assembly 130 rotates and the movable contactor 140 also rotates. Even at this time, the movable contact 140 is restrained by the force of the spring 160 and moves together with the shaft body 131.
- the third case is a case where the movable contactor 140 is separated from the fixed contactors 120 and 121 and rotates due to electromagnetic repulsion when a large fault current such as a short circuit current occurs (so-called current limiting blocking).
- the movable contact 140 rotates independently from the shaft body 131.
- the movable contact 140 moves within the opening 133 of the shaft body 131.
- the movable contact 140 overcomes the elastic force of the spring 160 due to a strong electromagnetic repulsion force and moves clockwise, the movable contact 140 is separated from the fixed contacts 120 and 121.
- the movable contact 140 is separated from the fixed contacts 120 and 121 and fixed with the movable contact 140 in contact with the shaft pin 165. That is, in this case (current-limiting blocking), the shaft assembly 130 moves only the movable contact 140 independently while the shaft body 131 does not rotate.
- Figures 8 and 9 are perspective views of a trip unit applied to a molded circuit breaker according to an embodiment of the present invention as seen from different directions
- Figure 10 is a perspective view of a heater and a magnet applied to the trip unit
- Figure 11 is an exploded view of the heater and magnet.
- Perspective view Figure 12 is an exploded perspective view of the heater.
- a trip unit 200 is provided in a part of the enclosure 101 to detect abnormal current flowing in the circuit and trip the opening/closing mechanism.
- the trip unit 200 is usually provided on the load side.
- the trip unit 200 includes a trip unit case 280 that accommodates the trip unit components, a heater 210 connected to a part of the circuit, and a bimetal that is coupled to the heater 210 to sense heat and curves according to the amount of heat generated. (240), a magnet 250 and an armature 260 installed around the heater 210, a crossbar 270 installed to rotate by contact with the bimetal 240 or the armature 260, and a crossbar 270 ) includes a shooter 275 that is restrained or released by rotation of the nail 118 of the opening/closing mechanism 125.
- a trip unit case 280 is provided.
- the trip unit case 280 accommodates and supports the components of the trip unit 200.
- the trip unit case 280 may be made of synthetic resin for insulation.
- a contact protection unit 282 is protruding from the front of the trip unit case 280.
- the contact protection unit 282 surrounds, protects, and insulates the fixed contactor 121 on the load side.
- the trip unit case 280 is provided with an inter-phase partition 284 inside to separate each phase.
- the interphase partition 284 may be provided as a double wall.
- the rear of the trip unit case 280 is open and the terminal part is connected or insulated by the enclosure 101.
- the heater 210 is provided in a part of the circuit to generate heat or induced current.
- Heater 210 is made of a conductor.
- the heater 210 is connected to a circuit and energized.
- the upper end of the heater 210 is connected to the load-side fixed contact 121, and the lower end of the heater 210 is connected to the load-side terminal 218 to allow current to pass through.
- the heater 210 serves to send a signal to the trip unit when overcurrent or large current flows. That is, when an overcurrent flows through the heater 210, heat is generated and transferred to the bimetal 240. Additionally, when a large current flows through the heater 210, a magnetic field is formed by the induced current, thereby generating a magnetic attraction force in the magnet 250.
- the heater 210 is configured to generate an induced current in a form that can enhance the magnetic attraction force of the magnet 250.
- the heater 210 forms a coil-shaped circular current like a solenoid. Accordingly, it is formed to generate a circular current in the form of a coil so that a magnetic field is formed in a form that penetrates the center of the circular current. It is the application of a magnetic field caused by a current flowing in a circular conductor.
- the heater 210 may be composed of a power source heater unit 220, a load side heater unit 211, and an insulating member 230 disposed between them.
- the power-side heater unit 220 and the load-side heater unit 211 form a double plate that partially overlaps to implement a coil shape.
- the power supply side heater unit 220 includes a power supply side connection terminal 221, a power supply side first vertical plate part 223, a power supply side middle part 225, and a power supply side coupling part 227.
- the current applied from the power supply unit that is, the current coming through the fixed contactor 121 on the load side, flows through the power supply side connection terminal 221, the power supply side first vertical plate part 223, the power supply side middle part 225, and the power supply side coupling part 227. move
- the power-side connection terminal 221 is coupled to the load-side fixed contact 121. That is, the power-side connection terminal 221 functions as a terminal or connection part. Therefore, the power-side connection terminal 221 is connected to a circuit and receives power from the power source. Current flows in.
- the power supply side middle portion 225 extends in the horizontal direction from the lower end of the power supply side first vertical plate portion 223.
- the power supply side middle portion 225 connects the power supply side first vertical plate portion 223 and the power supply side coupling portion 227.
- the power-side coupling portion 227 is a portion where the power-side heater portion 220 is coupled to the load-side heater portion 211.
- the power supply side coupling portion 227 is arranged side by side with the power supply side first vertical plate portion 223.
- the power supply side coupling portion 227 has a predetermined distance from the power supply side first vertical plate portion 223. This gap is connected by the power supply side middle portion 225.
- the load-side heater unit 211 includes a load-side coupling part 212, a load-side first vertical plate part 214, a load-side middle part 215, a load-side second vertical plate part 216, a load-side flat plate part 217, and a load-side terminal part 218. ) includes.
- the current coming from the power-side heater unit 220 is connected to the load-side coupling part 212, the load-side first vertical plate part 214, the load-side middle part 215, the load-side second vertical plate part 216, the load-side flat plate part 217, and the load-side Move to the terminal section (218).
- the load-side coupling portion 212 is coupled to the power-side coupling portion 227 of the power-side heater unit 220.
- the power-side heater unit 220 and the load-side heater unit 211 are directly coupled only to the power-side coupling unit 227 and the load-side coupling unit 212.
- other components of the power-side heater unit 220 and other components of the load-side heater unit 211 are not directly connected to each other.
- the load-side first vertical plate portion 214 extends upward from the load-side coupling portion 212. In the first vertical plate part 214 on the load side, the current flowing from the heater part 220 on the power source side moves upward.
- the load-side middle portion 215 extends in the horizontal direction from the top of the load-side first vertical plate portion 214.
- the load-side middle portion 215 connects the load-side first vertical plate portion 214 and the load-side second vertical plate portion 216.
- the second vertical plate portion 216 on the load side extends downward from the middle portion 215 on the load side.
- the load-side second vertical plate portion 216 is arranged side by side with the load-side first vertical plate portion 214.
- the load-side second vertical plate portion 216 moves the current flowing from the load-side first vertical plate portion 214 and the load-side middle portion downward.
- the load-side second vertical plate portion 216 is disposed at a predetermined distance from the load-side first vertical plate portion 214. That is, a magnetic force groove 213 is formed between the first vertical plate portion 214 on the load side and the second vertical plate portion 216 on the load side. This magnetic force groove 213 provides a space into which the protrusion 254 of the magnet 250 is inserted.
- the load-side second vertical plate portion 216 overlaps the power-side first vertical plate portion 223. That is, it is arranged to form a double plate. However, the load-side second vertical plate portion 216 and the power-side first vertical plate portion 223 are arranged to have a predetermined gap from each other by the insulating member 230. Therefore, the current does not flow directly from the first vertical plate part 223 on the power source side to the second vertical plate part 216 on the load side.
- the load-side flat plate portion 217 is bent and extended from the load-side second vertical plate portion 216.
- the load-side flat plate portion 217 is connected to the load-side terminal portion 218.
- the width of the load-side first vertical plate portion 214 and the load-side second vertical plate portion 216 is formed to be less than 1/2 of the width of the load-side flat plate portion 217.
- the width of the load-side first vertical plate portion 214 and the load-side second vertical plate portion 216 is formed to be less than 1/2 of the width of the power supply side connection terminal 221.
- the load side terminal portion 218 extends from the load side flat plate portion 217.
- the load side terminal portion 218 forms a terminal portion to which the load is connected.
- the current applied to the heater 210 from the power source is transmitted to the load through the load side terminal portion 218.
- a support portion 219 may be provided on the lower surface of the load side terminal portion 219.
- the insulating member 230 is interposed between the power supply side heater unit 220 and the load side heater unit 211.
- the insulating member 230 may be composed of insulating paper. Specifically, the insulating member 230 may be formed in an 'L' shape. That is, the insulating member 230 may be composed of an insulating vertical plate portion 231 and an insulating horizontal plate portion 232.
- the insulating member 230 prevents the power supply side heater unit 220 and the load side heater unit 211 from being directly connected to each other except at the coupling portion.
- the insulating vertical plate portion 231 is interposed between the first vertical plate portion 223 on the power source side and the second vertical plate portion 216 on the load side.
- the insulating horizontal plate portion 232 is interposed between the upper end of the first vertical plate portion 223 on the power supply side (or one side of the power supply side connection terminal 221) and the middle portion 215 on the load side.
- the bimetal 240 is formed by combining two metal plates with different thermal conductivities and is curved when heat is generated.
- the bimetal 240 is in contact with the heater 210 and is curved when heat is transferred to rotate the crossbar 270.
- the bimetal 240 functions as an overcurrent trip.
- Armature 260 is installed in heater 210. Specifically, the armature 260 is installed on the load-side plate portion 217 of the load-side heater portion 211. The armature is shown in Figures 7 and 9.
- Armature 260 is installed by armature support 262 and return spring 264.
- the armature 260 is made of a magnetic material, and when the magnetic force of the magnet 250 is stronger than the elastic resistance force of the return spring 264, it overcomes it and is attracted (rotates) in the direction of the magnet 250.
- the magnet 250 is installed behind the heater 210. When a sudden change in current occurs in the heater 210, the magnetic attraction of the magnet 250 is increased by a magnetic field caused by the induced current.
- the magnet is clearly shown in Figures 10 and 11.
- the magnet 250 may be formed in a 'T' shape when viewed from above.
- a fixing groove 252 is formed in the fixing plate part 251 and is fixedly installed in the trip unit case 280.
- the fixing plate portion 251 is disposed on the rear surface (contact portion direction) of the heater 210.
- the protrusion 254 protrudes in a direction perpendicular to the fixing plate portion 251.
- the protrusion 254 is inserted into the magnetic force groove 213 of the heater 210. That is, the protrusion 254 penetrates between the power-side first vertical plate portion of the power-side heater portion 220 and the load-side first vertical plate portion of the load-side heater portion 211. Additionally, the protrusion 254 is inserted into the gap between the first vertical plate portion on the load side and the second vertical plate portion on the load side.
- the crossbar 270 is rotated by the bimetal 240 or the armature 260 to release the restraint on the shooter 275 and operate the opening/closing mechanism 125.
- the crossbar 270 is provided with an adjustment screw 272 to adjust the distance between it and the bimetal 240.
- the armature is allowed to operate within the instantaneous standard range even at low rated current.
- the heater is composed of a double plate of a power-side heater unit and a load-side heater unit coupled thereto, forming a circular current.
- An insulating member is interposed between the power-side heater unit and the load-side heater unit to facilitate the flow of current between the double plates.
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Abstract
Description
Claims (11)
- 회로에 연결되는 히터;상기 히터에 인접하게 설치되는 마그넷; 및회동 가능하게 설치되어 상기 마그넷이 자화되면 상기 마그넷의 방향으로 흡인되는 아마추어를 포함하고,상기 히터의 중앙부에는 자기력홈이 형성되고, 상기 마그넷에는 상기 자기력홈에 삽입되어 상기 아마추어를 향하여 돌출되는 돌출부가 마련되는 배선용 차단기의 순시 트립 장치.
- 제1항에 있어서, 상기 히터는,전원측에 연결되는 전원측 히터부와,일부가 상기 전원측 히터부에 중첩 배치되는 부하측 히터부 및전원측 히터부와 부하측 히터부 사이에 개재되는 절연부재를 포함하는 배선용 차단기의 순시 트립 장치.
- 제2항에 있어서, 상기 전원측 히터부는,전원측에 연결되는 전원측 연결단자,상기 전원측 연결단자에 연결되고 하방으로 연장되는 전원측 제1 세로판부,상기 전원측 제1 세로판부로부터 가로 방향으로 연장되는 전원측 중간부,상기 전원측 중간부에 연결되는 전원측 결합부를 포함하는 배선용 차단기의 순시 트립 장치.
- 제3항에 있어서, 상기 부하측 히터부는,상기 전원측 결합부에 결합되는 부하측 결합부,상기 부하측 결합부에서 상방으로 연장되는 부하측 제1 세로판부,상기 부하측 제1 세로판부로부터 가로 방향으로 연장되는 부하측 중간부,상기 부하측 중간부로부터 하방으로 연장되고 상기 부하측 제1 세로판부에 나란히 배치되는 부하측 제2 세로판부,부하측 제2 세로판부로부터 절곡 연장되는 부하측 평판부 및상기 부하측 평판부에 연결되는 부하측 단자부를 포함하는 배선용 차단기의 순시 트립 장치.
- 제3항에 있어서, 상기 전원측 제1 세로판부의 폭은 상기 전원측 연결단자의 폭의 1/2 미만으로 형성되는 배선용 차단기의 순시 트립 장치.
- 제4항에 있어서, 상기 부하측 제1 세로판부 및 부하측 제2 세로판부의 폭은 상기 부하측 평판부의 폭의 1/2 미만으로 형성되는 배선용 차단기의 순시 트립 장치.
- 제4항에 있어서, 상기 부하측 제2 세로판부와 전원측 제1 세로판부는 상기 절연부재를 사이에 두고 중첩 배치되는 배선용 차단기의 순시 트립 장치.
- 제4항에 있어서, 상기 부하측 제1 세로판부와 부하측 제2 세로판부 사이에는 상기 자기력홈이 형성되는 배선용 차단기의 순시 트립 장치.
- 제2항에 있어서, 상기 절연부재는 절연 세로판부와 절연 가로판부를 포함하는 배선용 차단기의 순시 트립 장치.
- 제1항에 있어서, 상기 마그넷은,트립부 케이스에 고정 설치되는 고정판부 및상기 고정판부로부터 직교 방향으로 돌출되어 상기 자기력홈에 삽입되는 돌출부를 포함하는 배선용 차단기의 순시 트립 장치.
- 제10항에 있어서, 상기 고정판부에는 상기 트립부 케이스에 고정 설치하기 위한 고정홈이 형성되는 배선용 차단기의 순시 트립 장치.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2025529816A JP2025536774A (ja) | 2023-01-19 | 2024-01-08 | 配線用遮断器の瞬時トリップ装置 |
| DE112024000290.0T DE112024000290T5 (de) | 2023-01-19 | 2024-01-08 | Sofortauslösevorrichtung für einen kompaktleistungsschalter |
| CN202480005879.0A CN120418916A (zh) | 2023-01-19 | 2024-01-08 | 配线用断路器的瞬时跳闸装置 |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2023-0007777 | 2023-01-19 | ||
| KR1020230007777A KR20240115454A (ko) | 2023-01-19 | 2023-01-19 | 배선용 차단기의 순시 트립 장치 |
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| WO2024154997A1 true WO2024154997A1 (ko) | 2024-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| PCT/KR2024/000340 Ceased WO2024154997A1 (ko) | 2023-01-19 | 2024-01-08 | 배선용 차단기의 순시 트립 장치 |
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| Country | Link |
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| JP (1) | JP2025536774A (ko) |
| KR (1) | KR20240115454A (ko) |
| CN (1) | CN120418916A (ko) |
| DE (1) | DE112024000290T5 (ko) |
| WO (1) | WO2024154997A1 (ko) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130207768A1 (en) * | 2012-02-14 | 2013-08-15 | Stephan Lehmann | Thermomagnetic trip for small current ranges |
| US20150348733A1 (en) * | 2012-12-28 | 2015-12-03 | Schneider Electric Industries Sas | Overload protection device and thermal magnetic adjustable trip unit for a breaker comprising the same |
| KR20170003457U (ko) * | 2016-03-29 | 2017-10-12 | 엘에스산전 주식회사 | 배선용 차단기 |
| KR101821966B1 (ko) * | 2016-09-12 | 2018-01-26 | 제일전기공업 주식회사 | 누전차단기의 순시트립장치 |
| KR101890685B1 (ko) * | 2016-12-30 | 2018-08-22 | 엘에스산전 주식회사 | 직류 배선용 차단기 |
-
2023
- 2023-01-19 KR KR1020230007777A patent/KR20240115454A/ko active Pending
-
2024
- 2024-01-08 WO PCT/KR2024/000340 patent/WO2024154997A1/ko not_active Ceased
- 2024-01-08 CN CN202480005879.0A patent/CN120418916A/zh active Pending
- 2024-01-08 DE DE112024000290.0T patent/DE112024000290T5/de active Pending
- 2024-01-08 JP JP2025529816A patent/JP2025536774A/ja active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130207768A1 (en) * | 2012-02-14 | 2013-08-15 | Stephan Lehmann | Thermomagnetic trip for small current ranges |
| US20150348733A1 (en) * | 2012-12-28 | 2015-12-03 | Schneider Electric Industries Sas | Overload protection device and thermal magnetic adjustable trip unit for a breaker comprising the same |
| KR20170003457U (ko) * | 2016-03-29 | 2017-10-12 | 엘에스산전 주식회사 | 배선용 차단기 |
| KR101821966B1 (ko) * | 2016-09-12 | 2018-01-26 | 제일전기공업 주식회사 | 누전차단기의 순시트립장치 |
| KR101890685B1 (ko) * | 2016-12-30 | 2018-08-22 | 엘에스산전 주식회사 | 직류 배선용 차단기 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20240115454A (ko) | 2024-07-26 |
| JP2025536774A (ja) | 2025-11-07 |
| DE112024000290T5 (de) | 2025-09-04 |
| CN120418916A (zh) | 2025-08-01 |
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