Apparatus for indicating the power state of a control box

Abstract

A control box power status indicator is provided, which is attached to the bottom surface of a control box to indicate the power status of the control box. The presented control box power status indicator includes a housing attached to the bottom of the control box, a bottom cover formed of a transparent material and attached to the bottom of the housing, an actuator positioned in a receiving space formed inside the housing and the bottom cover and moving up and down based on whether external power is supplied to the control box, a fixed indicator positioned in the receiving space and configured to indicate the normal supply status of the control box through the bottom cover when the actuator rises, and a moving indicator positioned within the receiving space and configured to house the fixed indicator inside and indicate the abnormal supply status of the control box through the bottom cover when the actuator lowers.

Description

Technology Field

[0001] The present invention relates to a control box power status display device having a receiving structure, and more specifically, to a control box power status display device that displays the power status of a control box included in power equipment such as an automatic fault section switch or an epoxy-insulated fault section circuit breaker. Background Technology

[0002] An Auto Section Switch (ASS) is a switch that automatically isolates a fault section to prevent cascading failures for high-voltage customers.

[0003] The ASS directly interrupts the fault current when the fault current is less than the LOCK current, and when the fault current is greater than the LOCK current, it operates by interrupting (shaft tripping) in a no-voltage state in cooperation with a backup protection device (Circuit Breaker; CB or recloser), thereby preventing the fault from spreading to the distribution system when a fault occurs on the customer side.

[0004] Epoxy Insulated Fault Interrupters (EFIs) are circuit breakers installed at the responsibility demarcation points of high-voltage customers or connected distributed power sources to automatically isolate fault sections.

[0005] EFI detects when an overcurrent exceeding the corrected minimum operating current flows and performs a tripping operation, thereby preventing the spread of a fault to the distribution system when a fault occurs on the customer side.

[0006] The ASS and EFI consist of a main body and a control box. The power for the control circuit and charging device inside the control box is supplied by an external AC power source, but in the event of a power outage, it is supplied by a built-in battery. The external power source is supplied continuously using a low-voltage distribution line (220V).

[0007] In order for ASS and EFI to directly interrupt fault current or perform a normal trip operation, power must be supplied normally to the control box.

[0008] If the external AC power is lost and the battery inside the control box is discharged within 24 hours, the device cannot perform any operations, and thus, in the event of a customer-related failure, the fault spreads to the entire distribution line. At this time, the causes of the loss of power to the control box (i.e., external AC power) are diverse, including human errors such as failure to connect the external AC power or turning off the control box during new installation, as well as external reasons such as the disconnection of the external AC power (contact with external objects, vehicle collision, etc.) and damage to the control box (lightning strike and other damage).

[0009] Accordingly, power suppliers conduct scheduled inspections frequently to verify whether power is being supplied normally to the control box, but the status of power supply can only be confirmed by opening the control box door.

[0010] There are approximately 13,000 ASS and EFI units installed on distribution lines, and the number of units installed is increasing rapidly every year to prevent customer-side cascading failures. However, due to the difficulty in managing power for control boxes, there are repeated instances where the original purpose of installation—maintaining the integrity of distribution lines by blocking cascading failures—is not performed. Prior art literature

[0011] Korean Registered Patent No. 10-0478979 (Title: Distribution Panel Power Status Display Device) The problem to be solved

[0012] The present invention is proposed in consideration of the above circumstances and aims to provide a control box power status display device attached to the bottom surface of a control box to display the power status of the control box. means of solving the problem

[0013] To achieve the above-mentioned objective, a control box power status indicator device according to an embodiment of the present invention comprises a housing fastened to the lower part of a control box, a lower cover formed of a transparent material and fastened to the lower part of the housing, an actuator disposed in a receiving space formed inside the housing and the lower cover and moving up and down based on whether external power is supplied to the control box, a fixed indicator disposed in the receiving space and configured to display the normal supply status of the control box through the lower cover when the actuator rises, and a moving indicator disposed in the receiving space and configured to house the fixed indicator inside and display the abnormal supply status of the control box through the lower cover when the actuator lowers.

[0014] The actuator rises when external power is supplied to the control box and lowers when the external power is cut off from the control box. The lower cover has a receiving space formed inside, and on the bottom surface of the receiving space, a guide projection is formed that protrudes toward the housing to guide the installation of a fixed indicator, and on the lower surface of the fixed indicator, a guide groove is formed to receive the guide projection.

[0015] A control box power status indicator device according to an embodiment of the present invention may further include a first solenoid positioned above a fixed indicator in a receiving space and configured to raise an actuator when power is applied when external power is supplied to the control box. The first solenoid is configured to raise the actuator by forming a magnetic path in the same direction as the permanent magnet of the actuator when external power is applied to the control box. At this time, when the control box is in a normal supply state, the external power of the control box is applied to the first solenoid.

[0016] The control box power status indicator device according to an embodiment of the present invention may further include a second solenoid positioned above the first solenoid in the receiving space and configured to lower the actuator when power is applied when the external power to the control box is cut off. The second solenoid is configured to lower the actuator by forming a magnetic path in the opposite direction with the permanent magnet of the actuator when the external power to the control box is cut off. At this time, if the control box is in an abnormal supply state, power from a capacitor charged in the normal supply state of the control box is applied to the second solenoid.

[0017] A control box power status display device according to an embodiment of the present invention further comprises a bobbin having a through hole formed therein through which the actuator passes, which is positioned above the actuator in a receiving space, and a first solenoid and a second solenoid are positioned along the outer circumference of the through hole.

[0018] The actuator includes an upper plunger, a permanent magnet disposed below the upper plunger, and a lower plunger disposed below the permanent magnet and having a movement indicator attached to its lower portion. At this time, the control box power status display device according to an embodiment of the present invention may further include a spring disposed between the lower plate of the bobbin and the upper portion of the lower plunger, which winds around the outer circumference of the upper plunger and the permanent magnet.

[0019] A receiving space is formed that is open in the downward direction for the moving indicator, and when the moving indicator descends, a fixed indicator is received in the receiving space.

[0020] The control box power status display device according to an embodiment of the present invention may further include a shielding plate formed of an opaque material and disposed in a receiving space formed in a lower cover, and disposed to face the side of a movement indicator raised by an actuator.

[0021] The area of ​​the lower cover facing the side of the movement indicator raised by the operator may be formed of an opaque material.

[0022] A control box power status display device according to an embodiment of the present invention may further include a printed circuit board having a control circuit formed thereon that controls the raising and lowering of an operator based on whether external power is supplied to the control box. At this time, if the control box is in a normal supply state, the control circuit applies external power to a first solenoid that raises the operator and then cuts it off after a set time, charges a capacitor with external power if the control box is in a normal supply state, and applies the power charged in the capacitor to a second solenoid that lowers the operator if the control box is in an abnormal supply state.

[0023] A power status indicator for a control box according to an embodiment of the present invention further includes a fixing bolt for fastening a housing to the lower part of the control box, and a drainage groove is formed in the head of the fixing bolt to form a drainage channel for draining water from the control box. Effects of the invention

[0024] According to the present invention, the control box power status display device is attached to the bottom surface of the control box and displays the power status of the control box, thereby providing the effect of visually checking the power supply status of the control box from the ground without opening the door of the control box.

[0025] In addition, the control box power status indicator allows the power supply status of the control box to be visually checked from the ground without opening the control box door, thereby minimizing the time and cost required to inspect the status of the control box.

[0026] In other words, the control box power status indicator allows for visual inspection of the power supply status from the ground while performing track inspections (normal duties), without having to board a bucket truck and open the control box door to check the power supply status. This improves the efficiency of preventive inspections and significantly reduces the time and cost required for inspections.

[0027] In addition, the control box power status indicator maintains the integrity of the control box power supply at all times from the automatic fault section switch and the epoxy-insulated fault section circuit breaker, thereby effectively preventing the spread of a fault to the entire distribution line in the event of a customer-induced power outage.

[0028] In addition, the control box power status indicator device maintains the soundness of the control box power at all times, thereby preventing the spread of faults to the entire distribution line in the event of a customer-induced power outage, which has the effect of improving the electrical quality of the power system. Brief explanation of the drawing

[0029] FIGS. 1 to 3 are drawings for explaining a control box power status display device according to an embodiment of the present invention. FIG. 4 is a drawing for explaining the fixing bolt of FIG. 3. FIGS. 5 and FIGS. 6 are drawings for explaining the housing of FIGS. 3. FIGS. 7 and FIGS. 8 are drawings for explaining the lower cover of FIGS. 3. FIGS. 9 and FIGS. 10 are drawings for explaining the fixed indicator of FIG. 3. FIG. 11 is a drawing for explaining the fixed plate of FIG. 3. FIGS. 12 and FIGS. 13 are drawings for explaining the yoke of FIG. 3. FIG. 14 is a drawing for explaining the bobbin of FIG. 3. FIGS. 15 and FIGS. 16 are drawings for explaining the first solenoid and the second solenoid of FIG. 3. FIGS. 17 to 19 are drawings for explaining the movable part of FIG. 3. FIGS. 20 and FIGS. 21 are drawings for explaining the movement indicator of FIG. 3. FIGS. 22 and FIGS. 23 are drawings for explaining the shielding plate of FIG. 3. FIGS. 24 and 25 are drawings for explaining the operation of a control box power status display device according to an embodiment of the present invention. Specific details for implementing the invention

[0030] Hereinafter, in order to provide a detailed explanation sufficient for a person skilled in the art to easily implement the technical concept of the present invention, the most preferred embodiment of the present invention will be described with reference to the accompanying drawings. First, it should be noted that in assigning reference numerals to the components of each drawing, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, in describing the present invention, if it is determined that a detailed description of related known components or functions may obscure the essence of the present invention, such detailed description is omitted.

[0031] Hereinafter, a control box power status display device according to an embodiment of the present invention will be described with reference to the attached drawings. FIGS. 1 to 23 are drawings for explaining a control box power status display device according to an embodiment of the present invention, and FIGS. 24 and 25 are drawings for explaining the operation of a control box power status display device according to an embodiment of the present invention.

[0032] Referring to FIG. 1, the control box power status indicator is installed in the control box of a protection device such as an Auto Section Switch (ASS) and an Epoxy Insulated Fault Interrupter (EFI).

[0033] The control box power status indicator is coupled to the control box of the protective device and positioned to be exposed to the outside of the control box. For example, the control box power status indicator is installed at the bottom of the control box to facilitate visual diagnosis by an operator.

[0034] The control box power status indicator displays the external power (AC) supply status of the control box. When normal external power (AC) is input to the control box, the control box power status indicator displays a normal supply status (ON). When external power (AC) is not supplied to the control box, the control box power status indicator displays an abnormal supply status (OFF).

[0035] Referring to FIGS. 2 and 3, the control box power status indicator is configured to include a fixing bolt (101), a housing (105), a lower cover (109), a fixing indicator (116), a fixing plate (118), a yoke (124), a bobbin (132), a first solenoid (138), a second solenoid (139), a mover (141), a spring (146), a moving indicator (147), and a shielding plate (151).

[0036] The fixing bolt (101) is a bolt for fastening the control box power status indicator to the control box. The fixing bolt (101) has a drainage groove (102) formed in its head to drain water inside the control box. The threaded portion of the fixing bolt (101) has a coupling groove (103) formed therein to which an O-ring is coupled for waterproofing the control box power status indicator.

[0037] A fixing bolt (101) has a wiring hole (104) formed therein through which a cable connected to the external power line of the control box passes. The wiring hole (104) is formed by penetrating the fixing bolt (101) vertically.

[0038] The housing (105) is coupled to the lower part of the control box. The housing (105) is coupled to the lower part of the control box by being fastened to a fixing bolt (101) positioned through the lower surface of the control box.

[0039] Referring to FIGS. 5 and 6, the housing (105) is formed in a cylindrical shape with a first receiving space (106) formed inside. That is, the housing (105) is formed in a cylindrical shape having two circular bottom surfaces and side surfaces.

[0040] The upper surface of the housing (105) is in contact with the lower surface of the control box. At this time, the upper surface of the housing (105) refers to one of the two bottom surfaces of the cylinder that is in contact with the lower surface of the control box. A projection (S) for forming a drainage channel may be formed on the upper surface of the housing (105) together with the drainage groove (102) of the fixing bolt (101).

[0041] The housing (105) is fixed to the lower surface of the control box via a fixing bolt (101). To this end, a first fastening hole (107) is formed on the upper surface of the housing (105). At this time, the first fastening hole (107) is a hole into which the fixing bolt (101) is inserted and fastened to fasten the control box power status display device to the control box.

[0042] A first receiving space (106) in the shape of a cylinder is formed inside the housing (105). The first receiving space (106) is exposed to the lower surface of the housing (105) through an opening formed on the lower surface of the housing (105).

[0043] The lower surface of the housing (105) is joined to the lower cover (109). To this end, the lower surface of the housing (105) is formed in a donut shape with an opening formed inside. A plurality of first fastening grooves (108) are formed on the lower surface of the housing (105). A plurality of first fastening grooves (108) are formed at a predetermined interval from each other in an area located on the outer periphery of the opening on the lower surface of the housing (105). Here, the first fastening groove (108) is a groove into which a bolt is inserted to fasten the housing (105) and the lower cover (109).

[0044] The lower cover (109) is fastened to the lower surface of the housing (105). The lower cover (109) is formed of a transparent material to indicate the power supply status of the control box.

[0045] Referring to FIGS. 7 and 8, the lower cover (109) is formed in a cylindrical shape and placed at the bottom of the housing (105). The lower cover (109) is formed in a cylindrical shape having two bottom surfaces and side surfaces. At this time, a second receiving space (110) in the shape of a cylinder is formed inside the lower cover (109).

[0046] A second receiving space (110) in the shape of a cylinder is formed inside the lower cover (109). The second receiving space (110) is exposed to the upper surface of the lower cover (109) through an opening formed on the upper surface of the lower cover (109). At this time, the upper surface of the lower cover (109) refers to one of the two bottom surfaces of the cylinder that is positioned toward the housing (105).

[0047] A first guide projection (111) is formed on the bottom surface of the second receiving space (110) to guide the installation of a fixed indicator (116). The first guide projection (111) protrudes upward from the bottom surface of the second receiving space (110).

[0048] At this time, a plurality of second fastening grooves (112) may be formed on the bottom surface of the second receiving space (110). The plurality of second fastening grooves (112) are formed at a predetermined distance from the outer circumference of the first guide projection (111). At this time, the second fastening grooves (112) may be grooves into which a bolt is inserted for fixing the fixing indicator (116).

[0049] The upper surface of the lower cover (109) is formed in a donut shape with an opening formed inside. A plurality of third fastening grooves (113) are formed on the upper surface of the lower cover (109). A plurality of third fastening grooves (113) are formed in the area located on the outer periphery of the opening on the upper surface of the lower cover (109). Here, the third fastening groove (113) is a groove into which a bolt is inserted to fasten the fixing plate (118).

[0050] A protrusion (114) is formed on the side of the lower cover (109). The protrusion (114) is formed along the side surface of the lower cover (109) and protrudes outward from the side surface of the lower cover (109). Accordingly, the protrusion (114) is formed in a donut shape.

[0051] A plurality of second fastening holes (115) are formed in the protrusion (114). At this time, the plurality of second fastening holes (115) are holes through which bolts are inserted to fasten the housing (105) and the lower cover (109). The plurality of second fastening holes (115) are formed at positions corresponding one-to-one with the plurality of first fastening grooves (108) formed on the lower surface of the housing (105).

[0052] A portion of the lower cover (109) is received in the first receiving space (106) of the housing (105). That is, the upper portion of the lower cover (109) is received in the first receiving space (106) of the housing (105). At this time, the upper portion of the lower cover (109) refers to the portion positioned on the upper portion of the protrusion (114).

[0053] As the lower cover (109) is fastened to the upper cover, the first receiving space (106) and the second receiving space (110) form receiving spaces in which the components to be described later are received.

[0054] A fixed indicator (116) is placed in the second receiving space (110) of the lower cover (109) to indicate the normal supply state (ON) of the control box.

[0055] Referring to FIGS. 9 and 10, the fixed indicator (116) is formed in a cylindrical shape. At this time, the diameter of the fixed indicator (116) is formed to be smaller than the diameter of the second receiving space (110), so that the wall surface of the second receiving space (110) and the outer circumference of the fixed indicator (116) are spaced apart by a predetermined distance.

[0056] A character (ON) indicating the normal supply status of the control box is formed on the side of the fixed indicator (116). At this time, the character is formed in intaglio or relief.

[0057] A first guide groove (117) is formed on the lower surface of the fixed indicator (116) to receive the first guide projection (111) of the lower cover (109). At this time, the lower surface of the fixed indicator (116) refers to one of the two bottom surfaces of the cylinder that contacts the bottom surface of the second receiving space (110) of the lower cover (109). A cylindrical groove may also be formed on the upper surface of the fixed indicator (116).

[0058] The fixing plate (118) is fastened to the lower cover (109) to fix the yoke (124). The fixing plate (118) is composed of a pair to fix the yoke (124). At this time, the pair of fixing plates (118) are arranged to face each other with the yoke (124) as the center.

[0059] Referring to FIG. 11, a fixed plate (118) is formed by bending a metal plate to create a first bend (119). The fixed plate (118) can be divided into a horizontal section (120) and a vertical section (121) at the boundary of the first bend (119).

[0060] A pair of third fastening holes (122) are formed in the horizontal portion (120) through which a bolt passes to fix the fixing plate (118) to the upper surface of the lower cover (109). The bolt passing through the third fastening hole (122) is inserted into the third fastening groove (113) formed on the upper surface of the lower cover (109) to fasten the fixing plate (118) and the lower cover (109).

[0061] A fourth fastening hole (123) is formed in the vertical section (121) through which a bolt for fixing the yoke (124) passes. The fourth fastening hole (123) may be composed of multiple holes, and a bolt passing through the fourth fastening hole (123) is inserted into the yoke (124) to fasten the yoke (124) and the fixing plate (118).

[0062] The yoke (124) is connected to a fixed plate (118), a printed circuit board (152), and a bobbin (132). The side of the yoke (124) is connected to the fixed plate (118), the printed circuit board (152) is connected to the upper part of the yoke (124), and the bobbin (132) is connected to the lower part of the yoke (124).

[0063] Referring to FIGS. 12 and 13, the yoke (124) is formed by bending a metal plate to create a second bend (125) and a third bend (126). The yoke (124) can be divided into a flat plate (127) and a pair of side plates (128) at the boundary of the second bend (125) and the third bend (126).

[0064] A fifth fastening hole (129) is formed on the upper surface of the flat plate (127) through which a bolt to which a printed circuit board (152) is fastened passes. The bolt passing through the fifth fastening hole (129) is inserted into the bobbin (132) to fasten the printed circuit board (152) to the upper part of the yoke (124).

[0065] A second guide projection (131) is formed on the lower surface of the flat plate (127) to guide connection with the bobbin (132). The second guide projection (131) protrudes toward the lower case and is inserted into the bobbin (132).

[0066] The side plate portion (128) is positioned vertically with respect to the flat plate portion (127) by bending both ends of the metal plate downward at the second bend portion (125) and the third bend portion (126). A sixth fastening hole (130) is formed in the side plate portion (128) to which a bolt passing through the fourth fastening hole (123) of the fixing plate (118) is fastened. At this time, the sixth fastening hole (130) may be composed of multiple holes.

[0067] Referring to FIG. 14, the bobbin (132) is divided into an upper plate (133), a lower plate (134), and a column (135). The upper plate (133) and the lower plate (134) are positioned opposite each other with the column (135) in between. At this time, a first through hole (136) is formed in the bobbin (132) through which the movable member (141) passes. The first through hole (136) is formed to penetrate the upper plate (133), the lower plate (134), and the column (135).

[0068] A yoke (124) is attached to the top plate (133). A plurality of fixing protrusions (137) for attaching the yoke (124) are formed on the top plate (133). A second guide protrusion (131) of the yoke (124) attached to the top plate (133) is inserted into the first through hole (136). A first solenoid (138) and a second solenoid (139) are arranged on the outer circumference of the column (135).

[0069] Referring to FIGS. 15 and 16, the first solenoid (138) and the second solenoid (139) have a cylindrical receiving hole (140) formed in a cylindrical core, and a column (135) of a bobbin (132) is inserted into the inner circumference of the receiving hole (140).

[0070] The first solenoid (138) is supplied with external power (AC) in the normal supply state (ON) of the control box to raise the actuator (141). The first solenoid (138) forms a magnetic path in the same direction as the permanent magnet (143) to raise the actuator (141).

[0071] The second solenoid (139) lowers the actuator (141) by applying power from a capacitor connected to the printed circuit board (152) when the control box is in an abnormal supply state (OFF). The second solenoid (139) forms a reverse magnetic path with the permanent magnet (143) to lower the actuator (141). At this time, the capacitor charges power when the control box is in a normal supply state (ON) and discharges the charged power when the control box is in an abnormal supply state (OFF).

[0072] The operator (141) raises and lowers the movement indicator (147) to indicate the power supply status of the control box. That is, when the control box is in a normal supply state (ON), the operator (141) raises the movement indicator (147) so that the fixed indicator (116) is exposed through the lower cover (109). When the control box is in an abnormal supply state (OFF), the operator (141) lowers the movement indicator (147) so that the movement indicator (147) is exposed through the lower cover (109).

[0073] At this time, the actuator (141) moves up and down depending on whether the first solenoid (138) and the second solenoid (139) are operated, thereby raising and lowering the movement indicator (147). That is, when the first solenoid (138) is operated, the actuator (141) rises to raise the movement indicator (147). When the second solenoid (139) is operated, the actuator (141) descends to lower the movement indicator (147).

[0074] At least a portion of the actuator (141) is positioned within the first through hole (136) of the bobbin (132). That is, when the first solenoid (138) is operated, most of the actuator (141) is positioned within the first through hole (136) of the bobbin (132). When the second solenoid (139) is operated, only the upper portion of the actuator (141) is positioned within the first through hole (136) of the bobbin (132).

[0075] Referring to FIGS. 17 and 18, the actuator (141) is configured to include an upper plunger (142; plunger), a permanent magnet (143), a lower plunger (144), and a fastening bolt (145).

[0076] The upper plunger (142) is formed in a cylindrical shape with a through hole. The upper portion of the upper plunger (142) is always positioned within the first through hole (136) of the bobbin (132).

[0077] A permanent magnet (143) is positioned on the lower side of the upper plunger (142). The permanent magnet (143) is formed in a cylindrical shape with a through hole. The upper surface of the permanent magnet (143) is in contact with the lower surface of the upper plunger (142). At this time, the diameter of the permanent magnet (143) is formed to be the same as the diameter of the upper plunger (142).

[0078] The lower plunger (144) is formed in the shape of a circular plate and is positioned below the permanent magnet (143). The upper surface of the lower plunger (144) is in contact with the lower surface of the permanent magnet (143). At this time, the diameter of the lower plunger (144) is formed to be larger than the diameter of the upper plunger (142) and the permanent magnet (143).

[0079] The upper plunger (142) and the permanent magnet (143) are positioned within the first through hole (136) of the bobbin (132) when the first solenoid (138) is operated. At this time, the lower plunger (144) is positioned in close proximity to or in contact with the lower surface of the bottom plate (134) of the bobbin (132).

[0080] When the first solenoid (138) is operated, a portion of the upper plunger (142) is positioned within the first through hole (136) of the bobbin (132). At this time, the permanent magnet (143) and the lower plunger (144) are spaced apart from the bottom plate (134) of the bobbin (132) and positioned in close proximity to or in contact with the lower surface of the bobbin (132).

[0081] Referring to FIG. 19, a spring (146) is positioned between the lower plate (134) of the bobbin (132) and the lower plunger (144) of the actuator (141). The upper plunger (142) of the actuator (141) and a permanent magnet (143) are inserted and positioned inside the spring (146). The spring (146) lowers the actuator (141) when the control box is in an abnormal supply state (OFF) and fixes the actuator (141) in the lowered position.

[0082] The movement indicator (147) is placed in the second receiving space (110) of the lower cover (109) to indicate the abnormal supply state (OFF) of the control box. That is, the movement indicator (147) moves up and down within the receiving space formed in the housing (105) and the lower cover (109) as the actuator (141) moves up and down.

[0083] The moving indicator (147) rises when the control box is in a normal supply state (ON) to expose the fixed indicator (116). When the control box is in an abnormal supply state (OFF), the moving indicator (147) lowers and is placed in the second receiving space (110) of the lower cover (109). The moving indicator (147) covers the fixed indicator (116) in the second receiving space (110) and indicates the abnormal supply state (OFF) of the control box.

[0084] Referring to FIGS. 20 and 21, the movement indicator (147) is formed in a cylindrical shape. The upper surface of the movement indicator (147) is connected to the lower part of the movable member (141). At this time, the movement indicator (147) is connected to the lower part of the lower plunger (144) of the movable member (141).

[0085] A third receiving space (148) is formed inside the moving indicator (147) to accommodate a fixed indicator (116). The third receiving space (148) is exposed through openings formed on the lower surface of the moving indicator (147). At this time, when the moving indicator (147) descends due to the lowering of the movable member (141), the fixed indicator (116) is accommodated in the third receiving space (148).

[0086] On the side of the movement indicator (147), a character (OFF) indicating an abnormal supply status of the control box is formed. At this time, the character is formed in intaglio or relief.

[0087] On the upper surface of the moving indicator (147), a plurality of second through holes (149) into which bolts for fastening the moving indicator (147) and the moving member (141) are inserted, and a plurality of exhaust holes (150) for discharging air between the moving indicator (147) and the fixed indicator (116) when the moving indicator (147) is raised or lowered may be formed.

[0088] A shielding plate (151) is placed inside the second receiving space (110) of the lower cover (109) to prevent the movement indicator (147) in the raised state from being exposed through the lower cover (109). To this end, referring to FIGS. 22 and 23, the shielding plate (151) is placed in the second receiving space (110) of the lower cover (109). The shielding plate (151) is placed offset toward the upper part of the second receiving space (110). The shielding plate (151) can be made of an opaque sticker material and can be adhesively fixed to the inner wall surface of the second receiving space (110).

[0089] The lowest part of the cover plate (151) is positioned at the same height as the lowest part of the movement indicator (147) when the movement indicator (147) is raised to its maximum height. The lowest part of the cover plate (151) may also be positioned at a height lower than the lowest part of the movement indicator (147) when the movement indicator (147) is raised to its maximum height. In this case, the lowest part of the cover plate (151) is positioned at a height higher than the top part of the character displayed on the fixed indicator (116).

[0090] The lowest part of the cover plate (151) may be positioned at the same height as the top part of the fixed indicator (116). The cover plate (151) may be positioned at a lower height than the top part of the fixed indicator (116) and may partially overlap with the fixed indicator (116). In this case, the lowest part of the cover plate (151) is positioned at a higher height than the top part of the character displayed on the fixed indicator (116).

[0091] If the area where the cover plate (151) is placed in the second receiving space (110) of the lower cover (109) is opaque, the cover plate (151) may be excluded from the configuration.

[0092] A printed circuit board (152) is positioned on the upper part of a yoke (124) and connected to the yoke (124). The printed circuit board (152) has a control circuit formed therein that controls the display operation of a control box power status display device based on the power supply status of the control box.

[0093] When the control box is in a normal supply state (ON), the control circuit applies power to the first solenoid (138) for a set time and then cuts off the power. This minimizes the burden on the first solenoid (138) caused by continuous current. When the control box is in an abnormal supply state (OFF), the control circuit applies the power charged in the capacitor as power to the second solenoid (139).

[0094] Referring to FIG. 24, the operation of the control box power status indicator when the control box changes from an abnormal supply state (OFF) to a normal supply state (ON) is described as follows.

[0095] First, when the control box is in a state of external power loss where the external power (AC) is not supplied, the movement indicator (147) is maintained in a lowered state by the spring (146). The movement indicator (147) accommodates the fixed indicator (116), and the character (OFF) formed on the movement indicator (147) is exposed through the lower cover (109) to indicate that the control box is in an abnormal supply state (OFF).

[0096] When external power (AC) is normally supplied to the control box, the control circuit (printed circuit board (152)) applies external power to the first solenoid (138). As external power is applied, the first solenoid (138) generates a suction force and raises the actuator (141). At this time, the suction force is magnetic force, and refers to a force that raises the actuator (141) through interaction with the permanent magnet (143) or the actuator (141).

[0097] When the actuator (141) rises to the highest height through the suction force of the first solenoid (138), the control circuit (printed circuit board (152)) cuts off the power applied to the first solenoid (138) to minimize power consumption in the normal supply state (ON) and prevents operation errors caused by power consumption.

[0098] At this time, the actuator (141) maintains the raised state by the holding force (magnetic force) of the permanent magnet (143). The control circuit charges the capacitor with an external power supply applied when the control box is in a normal supply state (ON).

[0099] Accordingly, the moving indicator (147) is blocked from displaying the character (OFF) by the opaque area (i.e., the cover plate (151)) of the lower cover (109), and the character (OFF) formed on the fixed indicator (116) is exposed through the lower cover (109) to indicate that the normal supply state (ON) is being controlled.

[0100] Referring to FIG. 25, the operation of the control box power status indicator when the control box changes from a normal supply state (ON) to an abnormal supply state (OFF) is described as follows.

[0101] First, when external power (AC) is normally supplied to the control box, the actuator (141) maintains a raised state by the holding force (magnetic force) of the permanent magnet (143). The movement indicator (147) is blocked from displaying the character (OFF) by the opaque area (i.e., the cover plate (151)) of the lower cover (109), and the character (OFF) formed on the fixed indicator (116) is exposed through the lower cover (109) to indicate that the control box is in a normal supply state (ON).

[0102] When the control box changes to a state of external power loss, the control circuit (printed circuit board (152)) applies power charged in the capacitor to the second solenoid (139). As power is applied, the second solenoid (139) forms a magnetic path in the opposite direction with the permanent magnet (143). The magnetic path of the permanent magnet (143) is canceled out by the magnetic path in the opposite direction formed by the second solenoid (139), and the holding force (magnetic force) of the permanent magnet (143) is reduced. The actuator (141) descends to the lowest height by the restoring force (elasticity) of the spring (146).

[0103] Accordingly, the moving indicator (147) is lowered by the actuator (141) to receive the fixed indicator (116) and is maintained in a lowered state by the spring (146). The character (OFF) formed on the moving indicator (147) is exposed through the lower cover (109) to indicate that the control is in an abnormal supply state (OFF).

[0104] As described above, the control box power status indicator is attached to the bottom surface of the control box and displays the power status of the control box, thereby having the effect of allowing the power supply status of the control box to be visually checked from the ground without opening the door of the control box.

[0105] In addition, the control box power status indicator allows the power supply status of the control box to be visually checked from the ground without opening the control box door, thereby minimizing the time and cost required to inspect the status of the control box.

[0106] In other words, the control box power status indicator allows for visual inspection of the power supply status from the ground while performing track inspections (normal duties), without having to board a bucket truck and open the control box door to check the power supply status. This improves the efficiency of preventive inspections and significantly reduces the time and cost required for inspections.

[0107] In addition, the control box power status indicator maintains the integrity of the control box power supply at all times from the automatic fault section switch and the epoxy-insulated fault section circuit breaker, thereby effectively preventing the spread of a fault to the entire distribution line in the event of a customer-induced power outage.

[0108] In addition, the control box power status indicator device maintains the soundness of the control box power at all times, thereby preventing the spread of faults to the entire distribution line in the event of a customer-induced power outage, which has the effect of improving the electrical quality of the power system.

[0109] Although preferred embodiments according to the present invention have been described above, various modifications are possible, and it is understood that those skilled in the art can implement various variations and modifications without departing from the scope of the claims of the present invention. Explanation of the symbols

[0110] 101: Fixing bolt 105: Housing 109: Bottom cover 116: Fixed indicator 118: Fixed plate 124: Yoke 132: Bobbin 138: 1st Solenoid 139: Second solenoid 141: Actuator 146: Spring 147: Movement indicator 151: Shield 152: Printed circuit board

Claims

Claim 1 A control box power status display device comprising: a housing attached to the lower part of a control box; a lower cover formed of a transparent material and attached to the lower part of the housing; an actuator disposed in a receiving space formed inside the housing and the lower cover and moving up and down based on whether external power is supplied to the control box; a fixed indicator disposed in the receiving space and configured to display the normal supply status of the control box through the lower cover when the actuator rises; and a moving indicator disposed in the receiving space and configured to house the fixed indicator inside and display the abnormal supply status of the control box through the lower cover when the actuator lowers, wherein the lower cover has a receiving space formed inside, and a guide projection formed on the bottom surface of the receiving space protruding toward the housing to guide the installation of the fixed indicator, the actuator rises when external power is supplied to the control box and lowers when external power is cut off to the control box, and the moving indicator has a receiving structure in which a receiving space is formed that is open toward the lower direction and the fixed indicator is housed in the receiving space when the moving indicator lowers.

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