KR200326460Y1 - Recloser - Google Patents

Abstract

The present invention relates to a solid insulation recloser that can achieve miniaturization and light weight by performing solid insulation by molding an epoxy polymer material and a synthetic rubber polymer material as an insulating material.

The solid insulation recloser according to the present invention includes: a vacuum interrupter for blocking currents drawn into the lead terminals from the power supply side through a distribution line as separation of electrodes facing each other; A high voltage resistor for detecting a primary voltage supplied through the inlet terminal; A current converter which is in close contact with the bottom of the vacuum interrupter and connects and disconnects the power supply side and the load side; A current detector for detecting a load current and a fault current flowing through the lead terminal connected to the side of the current converter, using a metallic cover as a capacitive voltage detection element, and detecting a secondary current; A two-coil magnetic actuator capable of performing an individual operation, and an operation mechanism part including an insulating rod interlocked with the magnetic actuator; A bushing having the vacuum interrupter, the high voltage resistor, the current converter, the current detector, and the insulating rod therein, and detachable from the upper surface of the operation mechanism; An insulating material filled in the operation mechanism and the bushing to perform solid insulation; The control unit is connected to the control mechanism and detachable shielded control cable is provided with a control unit for controlling the operation mechanism by a digital control method. Therefore, the optimized insulation design and the external shape design are possible, thereby contributing to the improvement of economy through miniaturization and light weight.

Description

Solid Insulating Recloser {Recloser}

The present invention relates to a recloser, and more particularly, to a solid insulation recloser to achieve miniaturization and light weight by performing solid insulation by molding an epoxy polymer material and a synthetic rubber polymer material with an insulating material. will be.

In general, when the overcurrent of the distribution line occurs, the recloser is automatically re-injected after opening to prevent normal power outages, and in case of permanent failure, opening and closing is performed according to the set number of operations, that is, the sequence. It is a rear protection breaker that maintains stable line status by separating the sound line and the accident line by becoming lock-out after repeating.

The recloser consists of a control unit with a vacuum interrupter and a magnetic actuator in a corrosion-resistant stainless steel tank and is interconnected by a detachable shielded control cable.

The conventional recloser is filled with an insulated medium for insulation in the main body, and is insulated from the oil insulated type and the gas insulated type by the insulating method according to the filled insulating medium. Are distinguished.

The oil insulated recloser has to be kept in a state in which the insulated oil is lubricated more than a certain amount, and its weight is excessive, and in case of an accident by the recloser itself, it is possible to spread to the secondary human accident by high temperature insulated oil, In addition to the occurrence of accidents due to the insulation performance of the insulating oil is reduced, there is a problem such as leakage of water caused by the defect of the main body and hermetic elements and the moisture dissolved due to the moisture absorption and thereby causing insulation degradation.

On the other hand, the gas-insulated recloser is now widely used because the weight is significantly lighter than the oil-insulated type due to the filling of the insulating gas having a relatively lower specific gravity than the insulating oil, but the gas leakage by using SF ₆ gas, the leading cause of global warming Or there is a problem of serious environmental pollution due to the generation of toxic decomposition products due to the generation of arcs in the internal charging section. In addition, an accident may occur due to a decrease in the insulation performance of the gas due to the secular variation similar to the insulating oil, and additionally, treatment costs may be additionally generated by a separate treatment standard when the used gas is replaced.

Accordingly, an object of the present invention is to provide a solid insulation recloser to achieve miniaturization and light weight by performing solid insulation by molding an epoxy polymer material and a synthetic rubber polymer material as an insulating material.

Another object of the present invention is to configure the voltage detection element on the primary side, by using the metallic cover of the secondary side current detection unit as a capacitive voltage detection element to solve the trouble of interconnecting with the voltage detection element separately configured externally, 1 It is to provide a solid insulating recloser that enables the detection of the secondary side and secondary side voltage.

It is still another object of the present invention to provide a solid insulation recloser that allows the equalization plate and the pressure equalizer to be respectively formed at the secondary lead-out terminal part and the connection part of the operation mechanism part to enable the electric field concentration due to the local inequality.

In order to achieve the above objects, a solid insulation recloser according to the present invention includes: a vacuum interrupter for blocking current flowing into an incoming terminal from a power supply side through a distribution line as separation of electrodes facing each other; A high voltage resistor for detecting a primary voltage supplied through the inlet terminal; A current converter which is in close contact with the bottom of the vacuum interrupter and connects and disconnects the power supply side and the load side; A current detector for detecting a load current and a fault current flowing through the lead terminal connected to the side of the current converter, using a metallic cover as a capacitive voltage detection element, and detecting a secondary current; A two-coil magnetic actuator capable of performing an individual operation, and an operation mechanism part including an insulating rod interlocked with the magnetic actuator; A bushing having the vacuum interrupter, the high voltage resistor, the current converter, the current detector, and the insulating rod therein, and detachable from the upper surface of the operation mechanism; An insulating material filled in the operation mechanism and the bushing to perform solid insulation; The control unit is connected to the control mechanism and detachable shielded control cable is provided with a control unit for controlling the operation mechanism by a digital control method.

Figure 1a is a front view of a solid insulating recloser according to the present invention.

FIG. 1B is a sectional view taken along the line A-A 'of the solid insulating recloser of FIG. 1A;

FIG. 2A is an internal structural view (open state) of the bushing of the solid insulating recloser of FIG. 1B. FIG.

FIG. 2B is an internal structural view of the bushing of the solid insulation recloser of FIG.

FIG. 3A is a side view of the bushing of the solid insulating recloser of FIG. 1B. FIG.

3B is a bottom view of the bushing of the solid insulating recloser of FIG. 1B.

4 is a cross-sectional view of the pressure equalizer of FIGS. 2A and 2B.

Explanation of symbols on the main parts of the drawings

100: operating mechanism 102: magnetic actuator

104: insulated rod 200: bushing

202: incoming terminal 206: high voltage resistance

210: vacuum interrupter 220: current converter

230: equalizer 240: current detector

242: withdrawal terminal 244: pressure equalizing plate

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

1A is a front view of a solid insulation recloser according to the present invention, and FIG. 1B is a cross-sectional view taken along line AA ′ of the solid insulation recloser of FIG. 1A. 2A and 2B are internal structural views of the bushing of the solid insulating recloser of FIG. 1B, respectively, showing an open state and a closed state, respectively.

Referring to these drawings, the solid insulating recloser according to the present invention is a magnetic actuator (102) in a corrosion resistant stainless steel tank (tank) as shown in Figures 1a and 1b and It consists of a main body (1) with built-in components, and a control unit (not shown) interconnected by a shielded control cable detachable from the main body (1).

The main body 1 is divided into an operation mechanism part 100 including a magnetic actuator 102 and an insulating rod 104, and a plurality of bushings 200 that can be separated and replaced from an upper surface of the operation mechanism part 100. .

As shown in FIG. 2A, the bushing 200 prevents a wide area failure when an overcurrent of a distribution line is generated therein, and maintains a stable line state by dividing a healthy line and an accident line in case of permanent failure. The vacuum interrupter 210, the current converter 220, the current detector 240 and the like are installed.

At this time, the bushing 200 is a polymer material other than cycloaliphatic epoxy (Cycloaliphatic Epoxy) having excellent weather resistance, for example, using a polyurethane (Polyureathane), etc. through the APG (Automatic Pressure Gelation; Is produced. In addition, it is designed in the shape and the number of the shed (Shed) in consideration of the optimum creepage distance, and is manufactured in a short secondary shape to prevent short-circuit accidents due to algae.

For reference, the APG molding method is a method in which the internal components are molded into a mold and then molded, which is more economical and efficient than the molding method currently widely used. The bushing 200 manufactured by the APG molding method has excellent mechanical strength and is being used in parallel with an insulator made of silicon in power distribution and transmission lines.

An upper end of the inside of the bushing 200 is provided with an inlet terminal 202 through which the current supplied through the power distribution line is drawn in, and a lower portion of the inlet terminal 202 is provided with a vacuum interrupter 210 for blocking an overcurrent. .

The inlet terminal 202 is connected to the fixed electrode 212 in the vacuum interrupter 210, the side is formed with a recess to which the fixing rod 204 to be described later is formed.

The vacuum interrupter 210 is connected to the inlet terminal 202, the fixed electrode 212 receives a current from the power supply side, and the fixed electrode 212 by moving up or down facing each other with the fixed electrode 212 It is composed of a movable electrode 214 connected to or disconnected from and connected to or disconnected from the incoming terminal 202. At this time, the movable electrode 214 is connected to the bolt 232, the outer surface (Envelope) of the outside of the vacuum interrupter 210 made of a ceramic is soft to suppress physical interference with a polymer material such as epoxy First molded into silicon.

One side of the cylindrical fixing rod 204 is fastened in a concave portion formed on the side of the inlet terminal 202 by a screw method, and the other side of the fixing rod 204 detects a primary voltage supplied through the inlet terminal 202. The high voltage resistance 206 is connected.

The high voltage resistance 206 is a resistance of several kΩ or more, and one side is connected to the fixed rod 204 to receive the voltage supplied through the inlet terminal 202, and the other side to perform voltage detection and phase detection on the distribution line. The voltage is drawn through the first drawing rod 208 connected to the first drawing rod 208.

The first drawing rod 208 is made of aluminum (Al) or the same material, and is connected to the other side of the high voltage resistor 206 and becomes a drawing path of the voltage drawn from the high voltage resistor 206 and the high voltage resistor 206. Serves to fix it.

On the other hand, the bottom of the vacuum interrupter 210 is in close contact with the current conversion unit 220 for connecting and disconnecting the power supply side and the load side.

The current converting unit 220 has a cylindrical structure of the same material having an open top, and includes an electrode 222 connected to the bottom inside thereof, and the open upper part is formed on a ceramic outer surface of the vacuum interrupter 210. By being in close contact with each other, the external insulation is configured not to be mixed inside. At this time, the electrode 222 is composed of an electrode nut 224 fastened up and down by the same material of the flexible plate.

In addition, the spring 110 is configured to compensate for the stroke stroke defined in the case where the contact portions formed on the fixed electrode 212 and the movable electrode 214 are worn out according to the routine current switching and fault current blocking.

The first cavity 226 inside the current converter 220 is a space in which an insulating material is not mixed and allows the electrode 222 to flow up and down smoothly.

The lower surface of the current conversion unit 220 is configured with a bolt 232 for connection with the insulating rod 104 of the operating mechanism unit 100, the pressure equalizer 230 to perform the function of mitigating the electric field concentration according to the local inequality ) Is tightly fastened by the screw 236.

4 is a cross-sectional view of the pressure equalizer of FIGS. 2A and 2B. The pressure equalizer 230 is formed of a plurality of through-holes H on a side surface thereof so as to be suitable for molding using a polymer material made of aluminum or copper.

The bottom surface of the vacuum interrupter 210 and the upper surface of the open structure of the current converter 220 are in close contact with the bolt 232 and the nut 234 integrally with the bolt 232. At this time, the nut 234 is a cylindrical plate structure for preventing partial discharge, the bolt 232 is the adapter 106 associated with the bolt 112 mounted on the insulating rod 104 of the operating mechanism 100, Connected with.

On the other hand, the withdrawal terminal 242 for supplying current to the load side on the distribution line is connected to the side of the current conversion unit 220 is drawn to the front center of the bushing 200 as shown in Figure 1a.

In the middle of the drawing terminal 242, a current detecting unit 240 for detecting a load current and a fault current flowing through the drawing terminal 242 is formed through the outside, forming an equal electric field to the outside of the current detecting unit 240. Pressure equalizing plate 244 is configured.

The outside of the current detection unit 240 is composed of a metallic cover, the metallic cover is utilized as a capacitive voltage detection element for detecting the load side voltage. In addition, the current detector 240 is connected to the second and third lead rods 246 and 248 made of aluminum or copper, and the second lead rod 246 is connected to the metallic cover of the current detector 240. Connected to detect the secondary voltage, support the current detector 240, and the third lead rod 248 has two wires drawn from the current detector 240 for detecting the load current and the fault current. .

The equalizing plate 244 has a disk-shaped structure made of aluminum or copper, and performs an electric field relaxation function for forming an equal electric field of elements configured on the secondary side.

FIG. 3A is a side view of the bushing of the solid insulation recloser of FIG. 1B, and FIG. 3B is a bottom view of the bushing of the solid insulation recloser of FIG. 1B.

The first and second draw-out rods 208 and 246 are connected to the first and second sockets 238 and 250, respectively, so that the first and second voltage drawing terminals 254 (as shown in FIG. 3B) ( 256). At this time, two wires (k, l) are drawn out from the current detector 240 and connected to the current drawing terminal 258, respectively.

The studs 260 illustrated in FIG. 3B serve to fix the bushing 200 to the upper surface of the operating mechanism part 100, and are configured with four or more studs in consideration of mechanical strength and various external forces such as a short circuit current.

The magnetic actuator 102 of the operation mechanism 100 is driven by a capacitor or a large capacity capacitor power supply of a battery in a 2-coil (Coil) method capable of performing individual operations. In addition, one side of the insulating rod 104 interlocked with the magnetic actuator 102 is connected to the magnetic actuator 102 by a connecting bolt 108, and the other side thereof is connected to the bolt 232 by the adapter 106. .

The insulating rod 104 smoothly flows in the bushing 200 by a second cavity 252 configured to secure a creepage distance under the bushing 200. At this time, the insulating rod 104 is made of glass-fiber reinforced (FRP) and epoxy material excellent in dielectric strength and mechanical strength.

Insulating material is formed to perform solid insulation to integrally form the bushing 200 and the internal components. The insulating material is an epoxy polymer material and a synthetic rubber polymer material.

A control unit (not shown) connected to the manipulation mechanism unit 100 by a detachable shielded control cable controls the magnetic actuator 102 of the manipulation mechanism unit 100 by a digital control method.

The magnetic actuator 102 and the tank in which the components are housed contain a certain amount of desiccant for removing moisture therein, and the state of the breaker, that is, the number of operations, the operation state, and the like, can be easily visually checked on the ground or on a pillar. A sight glass 114 is provided at the bottom of the tank.

In addition, the rubber plate 112 and the metallic reinforcement plate 110 are provided with the upper surface and the bushing of the tank 100 to compensate for the impact of the bushing 200 when the bushing 200 and the operation mechanism 100 tank are interconnected. It is inserted between the 200.

Therefore, the solid insulation recloser according to the present invention can achieve miniaturization and light weight by performing solid insulation by molding an epoxy polymer material and a synthetic rubber polymer material as an insulating material. In addition, by forming a high voltage resistor 206 as a voltage detecting element on the primary side, and utilizing the metallic cover of the secondary side current detecting unit 240 as a capacitive voltage detecting element, it is troublesome to interconnect with the voltage detecting element separately configured externally. Solve the problem and make it possible to detect the primary and secondary voltages. Then, by constructing the pressure equalizer 230 and the pressure equalizing plate 244 at the secondary side lead-out terminal and the connection part of the operating mechanism, the electric field concentration according to the local inequality field can be alleviated.

What has been described above is just one embodiment for operating the solid insulation recloser according to the present invention, anyone of ordinary skill in the art belongs to the technical scope of the present invention to the extent that various changes can be carried out It will be said to have spirit.

As described above, the solid insulation recloser according to the present invention has the following effects.

First, as compared with the excessive insulation design of the oil insulation type and gas insulation type, the optimized insulation design and the external shape design are possible, thereby contributing to the improvement of economy through miniaturization and light weight.

Second, by filling solids with insulating material to insulate solids, it is possible to prevent environmental pollution caused by contamination of insulating oils and toxic decomposition products and frequent replacement of products, and to reduce installation weight by achieving compact and lightweight products. Reliability can be secured by reducing the load caused by pole loads and other brackets.

Claims (6)

A vacuum cut-off unit which cuts off the current flowing into the inlet terminal from the power supply side through the distribution line as separation of electrodes facing each other; A high voltage resistor detecting a primary voltage supplied through the lead terminal; A current converter which is in close contact with the bottom of the vacuum interrupter and connects and disconnects the power supply and the load; A current detector for detecting a load current and a fault current flowing through the lead terminal connected to the side of the current converter, using a metallic cover as a capacitive voltage detection element, and detecting a secondary current; An operation mechanism part including a 2-coil magnetic actuator capable of performing an individual operation and an insulating rod interworking with the magnetic actuator; A bushing having the vacuum interrupter, the high voltage resistance, the current converter, the current detector, and the insulating rod therein, the bushing being detachable from the upper surface of the operating mechanism; An insulating material filled in the operation mechanism and the bushing to perform solid insulation; And And a control unit connected to the operation mechanism unit by a detachable shielded control cable to control the operation unit unit by a digital control method. The method according to claim 1, wherein at the location of the lead terminal and the location connected to the insulating rod of the operation mechanism, A solid insulation recloser characterized in that a pressure equalizer and a pressure equalizer are respectively provided for mitigating the electric field concentration according to a local inequality field. The method according to claim 1, The bushing, It is manufactured by APG (Automatic Pressure Gelation) molding method using cyclo-aliphatic epoxy and polymer material, and it is composed of secondary side shape to prevent short circuit accident by algae etc. Insulation Recloser. The method according to claim 1, wherein the insulating material, Solid insulating recloser, characterized in that the use of epoxy polymer material and synthetic rubber polymer material. The method according to claim 1, The insulating rod, Solid insulation recloser, which is made of fiber-glass reinforced plastic (FRP) and epoxy with excellent dielectric strength and mechanical strength. The method according to claim 2, wherein the pressure equalizer, And a plurality of through-holes formed in the side surface of the current conversion part, the plurality of through-holes being formed on the side surface of the current conversion part so as to be suitable for molding by aluminum or copper.