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KR-102964435-B1 - Break switch having test function for line soundness and Method for controlling the same

KR102964435B1KR 102964435 B1KR102964435 B1KR 102964435B1KR-102964435-B1

Abstract

A switch is provided that can prevent safety accidents involving the general public, workers, etc. caused by erroneous switching of the switch. The switch is characterized by comprising a main body housing in which a wing portion is formed, a branch housing coupled to the lower surface of the main body housing, and a safety switching test unit installed within the main body housing to perform a withstand voltage test for a line integrity test function.

Inventors

  • 송석훈

Assignees

  • 한국전력공사

Dates

Publication Date
20260513
Application Date
20240712

Claims (20)

  1. ◈Claim 1 was waived upon payment of the establishment registration fee.◈ A main body housing (101) in which a wing portion (101-1) is formed; A branch housing (102) coupled to the lower surface of the main body housing (101); and A safety insertion test unit (120) installed within the main body housing (101) to perform a withstand voltage test for the integrity test function of the line (10); comprising, A sensor (140) for detecting the live or non-live state of the line (10) is disposed inside the main body housing (101), and The above safety input test section (120) is, A withstand voltage tester (121) connected to the sensor (140) and performing a withstand voltage test on the line (10); and A switch having a line integrity test function, characterized by including a control module (122) that controls the operation of the above-mentioned withstand voltage tester (121).
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  4. ◈Claim 4 was waived upon payment of the establishment registration fee.◈ In Article 1, A switch having a line integrity test function, characterized in that a switch (110) that performs a cutoff operation when a preset current is reached while performing the withstand voltage test according to the control of the above control module (122) is installed between the safety insertion test unit (120) and the line (10).
  5. ◈Claim 5 was waived upon payment of the establishment registration fee.◈ In Article 4, The above withstand voltage tester (121) is, Power supply unit (310) that supplies a power source; A transformer (320) that generates a test voltage by stepwise transforming the above power source; A measuring instrument (330, 340) for measuring current or voltage according to the above test voltage; A maximum current limiter (350) that executes an opening command to the switching device (110) when the above preset current is reached; and A switch having a line integrity test function, characterized by including a step-up unit (360) that steps up the above test voltage to an extra-high voltage capable of withstanding voltage testing.
  6. ◈Claim 6 was waived upon payment of the establishment registration fee.◈ In Article 1, A switch having a line integrity test function, characterized in that a line switch (130) for blocking current flowing into the line (10) is disposed inside the branch housing (102).
  7. ◈Claim 7 was waived upon payment of the establishment registration fee.◈ In Article 1, A switch having a line integrity test function, characterized in that the above withstand voltage test is a step-by-step withstand voltage test performed in stages from a low voltage for a short period of time to prevent electric shock or arc.
  8. ◈Claim 8 was waived upon payment of the establishment registration fee.◈ A main body housing (201) in which two rods (202-1, 202-2) are formed; and A safety insertion test unit (220) installed on one of the two above-mentioned rods (202-1, 202-2) to perform a withstand voltage test for the soundness test function of the line (20, 21); comprising, A switch having a line integrity test function, characterized in that two rods (202-1, 202-2) are formed side by side at a certain interval, a first line (20) is arranged on the first rod (202-1) among the two rods (202-1, 202-2), and a safety insertion test section (220) is installed at the end of the second rod (202-2) and connected to a second line (21) that is connected in parallel with the first line (20).
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  10. ◈Claim 10 was waived upon payment of the establishment registration fee.◈ In Article 8, A switch having a line integrity test function, characterized in that a sensor (240) for detecting the live or non-live state of a line (20, 21) is disposed inside the main body housing (201).
  11. ◈Claim 11 was waived upon payment of the establishment registration fee.◈ In Article 10, The above safety input test section (220) is, A withstand voltage tester (221) connected to the sensor (240) and performing a withstand voltage test on the line (10); and A switch having a line integrity test function, characterized by including a control module (222) that controls the operation of the above-mentioned withstand voltage tester (221).
  12. ◈Claim 12 was waived upon payment of the establishment registration fee.◈ In Article 11, A switch having a line integrity test function, characterized in that a switch (210) that performs a cutoff operation when a preset current is reached while performing the withstand voltage test according to the control of the control module (222) is installed between the safety closing test unit (220) and the second line (21).
  13. ◈Claim 13 was waived upon payment of the establishment registration fee.◈ In Article 12, The above withstand voltage tester (221) is, Power supply unit (310) that supplies a power source; A transformer (320) that generates a test voltage by stepwise transforming the above power source; A measuring instrument (330, 340) for measuring current or voltage according to the above test voltage; A maximum current limiter (350) that executes an opening command to the switching device (210) when the above preset current is reached; and A switch having a line integrity test function, characterized by including a step-up unit (360) that steps up the above test voltage to an extra-high voltage capable of withstanding voltage testing.
  14. ◈Claim 14 was waived upon payment of the establishment registration fee.◈ In Article 8, A switch having a line integrity test function, characterized in that a line switch (230) for blocking current flowing into a first line (20) and a ground switch (232) for allowing current from the first line (20) or the second line (21) to flow to ground are arranged inside the main body housing (201).
  15. (a) A step in which a control module (122, 222) checks whether the line (10, 20, 21) is live using a sensor (140, 240); (b) If the above verification result indicates that the circuit is in a non-live state, the control module (122, 222) operates the switching device (110, 210) to switch on and drives the withstand voltage tester (121, 221) to perform a stepwise withstand voltage test; (c) a step in which the control module (122, 222) determines whether the withstand voltage test is successful; and (d) a step of providing a user with an indication that if the above withstand voltage test is successful according to the above judgment result, the above switching device (110, 210) is operated to open and the line switch (130, 231) can be closed; A control method for a switch having a line integrity test function, characterized by including
  16. In Article 15, The above step (b) is, A control method for a switch having a line integrity test function, characterized in that if the above-mentioned verification result indicates an active state, the control module (122, 222) provides a line abnormality warning indication.
  17. In Article 15, The above step (d) is, A control method for a switch having a line integrity test function, characterized by including the step of: if the above withstand voltage test is not successful according to the above judgment result, the control module (122, 222) operates the above switch device (110, 210) to open and provides a line abnormality warning indication.
  18. ◈Claim 18 was waived upon payment of the establishment registration fee.◈ (a) A step in which a control module (122, 222) checks whether the line (10, 20, 21) is live using a sensor (140, 240); (b) If the above verification result indicates that the circuit is in a non-live state, the control module (122, 222) operates the switching device (110, 210) to switch on and drives the withstand voltage tester (121, 221) to perform a stepwise withstand voltage test; (c) a step in which the control module (122, 222) determines whether the withstand voltage test is successful; and (d) If the above withstand voltage test is successful according to the above judgment result, the control module (122, 222) operates the switching device (110, 210) to open and closes the line switch (130, 231) to perform reclosing; A control method for a switch having a line integrity test function, characterized by including
  19. ◈Claim 19 was abandoned upon payment of the establishment registration fee.◈ In Article 18, The above step (b) is, A control method for a switch having a line integrity test function, characterized in that, if the above-mentioned verification result indicates an active state, the control module (122, 222) provides a line abnormality warning indication and a signal to terminate the reclosing procedure abnormality.
  20. ◈Claim 20 was waived upon payment of the establishment registration fee.◈ In Article 18, The above step (d) is, A control method for a switch having a line integrity test function, characterized by including the step of: if the above withstand voltage test is not successful according to the above judgment result, the control module (122, 222) operates the above switch (110, 210) to open and provides a line abnormality warning indication and a signal to terminate the reclosing procedure abnormality.

Description

Break switch having test function for line soundness and method for controlling the same The present invention relates to a switch, and more specifically, to a switch that is switched on after verifying safety using a withstand voltage tester having a limiting current that prevents electric shock accidents or arc generation before switching on the switch or reclosing the recloser, and a control method thereof. Switches (overhead, underground, reclosers, etc.) used in distribution lines have the function of disconnecting and closing the line. In the event of a power outage on distribution lines (22.9kV–13.2kV), reclosers automatically re-close the circuit to restore power if the system is healthy, whereas general switches restore power by visually inspecting the line from the distribution control room and closing it if a problem is confirmed. However, in such cases, power is frequently switched on even when the cause of the outage has not been resolved. Consequently, arcs generated by the switching current are causing wildfires and electric shock accidents involving the general public. In addition, safety accidents are occurring in which workers are injured or killed when switches are opened to shut down power distribution lines and work is performed, but switches are closed due to worker error or communication errors while workers are working in close proximity to the power distribution lines. Therefore, to prevent serious accidents and safety incidents, a switchgear safety reclosing and closing device is required that operates the switchgear after safely verifying its integrity using a low-energy test voltage in advance to identify potential causes of failure or safety concerns before reclosing and closing the distribution line. FIG. 1 is a conceptual diagram of an overhead switch having a line integrity testing function according to an embodiment of the present invention. FIG. 2 is a conceptual diagram of a ground switch having a line integrity test function according to another embodiment of the present invention. Figure 3 is a circuit diagram of the withstand voltage tester shown in Figures 1 and 2. FIG. 4 is a flowchart showing the opening and closing test process according to an embodiment of the present invention. FIG. 5 is a flowchart showing a reclosing test process according to another embodiment of the present invention. The present invention is capable of various modifications and may have various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the invention to specific embodiments, and it should be understood that the invention includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention. When describing each drawing, similar reference numerals are used for similar components. Terms such as first, second, etc., may be used to describe various components, but said components should not be limited by said terms. Such terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component. The term "and/or" includes a combination of a plurality of related described items or any of a plurality of related described items. Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which this invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application. A switch having a line integrity testing function and a control method thereof according to an embodiment of the present invention will be described in detail below with reference to the attached drawings. FIG. 1 is a conceptual diagram of an overhead switch (100) having a line integrity test function according to an embodiment of the present invention. Referring to FIG. 1, the overhead switch (100) may be configured to include a main body housing (101) having a wing portion (101-1) formed therein, a branch housing (102) coupled to the lower surface of the main body housing (101), and a safety insertion test portion (120) installed within the main body housing (101) to perform a safety insertion test for the integrity test function of the line (10). A wing portion (101-1) is integrally formed on the side of the main body housing (101). A bushing (103) is installed on the outer surface of this wing portion (101-1). A sensor (140) for detecting live lines is placed inside the main body housing (101). The sensor (140) performs the function of