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CN-224216736-U - Testing device for testing main loop resistance measurement capability

CN224216736UCN 224216736 UCN224216736 UCN 224216736UCN-224216736-U

Abstract

The utility model discloses a test device for verifying the resistance measurement capability of a main circuit, which comprises a left copper bar and a right copper bar which are supported by an insulating support rod at intervals, wherein a shunt is arranged on the inner side of one copper bar, a vacuum arc-extinguishing chamber is arranged on the inner side of the other copper bar, one end of the shunt is connected and assembled on the copper bar, the other end of the shunt is connected to a movable contact end of the vacuum arc-extinguishing chamber through a soft connecting piece, a fixed contact end of the vacuum arc-extinguishing chamber is connected and assembled on the copper bar, the movable contact end and the fixed contact end of the vacuum arc-extinguishing chamber are kept normally closed, a closed circuit is formed between the two copper bars by the shunt and the vacuum arc-extinguishing chamber, and after equipment to be tested is connected with the two copper bars, the test for verifying the measurement capability is realized, so that a verification result is effectively ensured.

Inventors

  • HU CHUN
  • HE XIUMING
  • JI XIYUE
  • ZHAO BINLIANG
  • CHEN FENGLIN
  • QIAN MING
  • BAI MENG

Assignees

  • 苏州电器科学研究院股份有限公司

Dates

Publication Date
20260508
Application Date
20250422

Claims (10)

  1. 1. A test device for verifying resistance measurement capability of a main loop is characterized by comprising a left copper bar (3) and a right copper bar (3) which are supported by an insulating support rod (5) at intervals, wherein a current divider (6) is arranged on the inner side of one copper bar (3), a vacuum arc-extinguishing chamber (4) is arranged on the inner side of the other copper bar (3), one end of the current divider (6) is connected and assembled on the copper bar (3), the other end of the current divider (6) is connected and assembled to a movable contact end of the vacuum arc-extinguishing chamber (4) through a soft connecting piece (7), a fixed contact end of the vacuum arc-extinguishing chamber (4) is connected and assembled on the copper bar (3), and the movable contact end and the fixed contact end of the vacuum arc-extinguishing chamber (4) are kept normally closed, and a closed loop is formed between the two copper bars (3) through the current divider (6) and the vacuum arc-extinguishing chamber (4).
  2. 2. A test device for testing the resistance measurement capability of a main loop according to claim 1, further comprising a shielding layer (2) shielding the shunt (6), wherein the top ends of the copper bars (3) pass through the shielding layer (2) upwards.
  3. 3. The test device for verifying the resistance measurement capability of the main loop according to claim 2, further comprising a box body (1), wherein the test device is accommodated in the box body (1), and the circumferential edge of the shielding layer (2) is matched with the circumferential profiling of the inner wall surface of the box body (1).
  4. 4. A test device for verifying main loop resistance measurement capability is characterized in that an insulating firmware layer (13) is arranged on the circumferential inner wall surface of a box body (1) below a shielding layer (2), a supporting piece (14) is assembled at the end part of an insulating supporting rod (5) extending outwards from a copper bar (3), and the outer wall surface of the supporting piece (14) is in profiling fit with the inner wall surface of the insulating firmware layer (13).
  5. 5. A test device for verifying the resistance measurement capability of a main loop as defined in claim 3, wherein the box body (1) is of an upward opening structure, a flip cover (12) is arranged at an opening above the box body (1), and a locking piece (11) is jointly arranged between the flip cover (12) and the upper edge of the box body (1).
  6. 6. A test device for verifying the resistance measurement capability of a main loop as set forth in claim 1, wherein binding posts and voltage measurement points (31) are arranged at the top end of the copper bar (3) at intervals up and down.
  7. 7. A test device for testing the resistance measurement capability of a main circuit according to claim 6, wherein the distance between the voltage measurement point (31) and the binding post is 10mm, and silver plating is performed at the voltage measurement point (31).
  8. 8. The test device for testing the resistance measurement capability of the main loop according to claim 1, wherein the flexible connecting piece (7) is a multi-layer copper foil, and two ends of the flexible connecting piece (7) are respectively connected with the shunt (6) and the movable contact end through bolts.
  9. 9. The test device for verifying the resistance measurement capability of the main loop according to claim 1, further comprising an insulating rod (9) arranged at the movable contact end, wherein the insulating rod (9) penetrates through the copper bar (3) in a sliding mode, an end block (81) is fixedly sleeved on the insulating rod (9), a pressure spring (8) is sleeved on the insulating rod (9) between the end block (81) and the inner wall surface of the copper bar (3), and the movable contact end is urged to be kept closed towards the fixed contact end by the pressure spring (8).
  10. 10. The test device for testing the resistance measurement capability of the main loop according to claim 1, wherein the insulating support rods (5) comprise two insulating support rods which are arranged at intervals up and down, the upper insulating support rods (5) are positioned above the current divider (6), the lower insulating support rods (5) are positioned below the vacuum arc extinguishing chamber (4), and the insulating support rods (5) are made of epoxy resin.

Description

Testing device for testing main loop resistance measurement capability Technical Field The utility model relates to the technical field of resistance measurement capability verification devices, in particular to a main loop resistance measurement capability verification test device. Background The main loop resistance measurement is an important detection item for factory inspection, type test, preventive test and the like of high-voltage electrical appliance products. The main loop resistance refers to the resistance of all conductive parts in a power transmission loop of switching equipment and control equipment, is one of quantitative indexes for evaluating the conductivity of an electric appliance, and mainly is tested to be the contact condition of a switch contact in the switching equipment such as a high-voltage switch and a loaded switch and the conductor connection condition of the equipment, wherein the overlarge resistance can cause loss increase, abnormal heating, insulation aging, even fire and the like, and the imbalance of three-phase resistance can cause three-phase voltage drop to be different, so that the loss of electric equipment is increased, the work is abnormal, the service life is shortened and the like. Therefore, when related units such as switch manufacturing enterprises, power generation and transmission and distribution units, power construction and installation units, railway operation and maintenance units and the like are used for checking, installing, maintaining and overhauling various switch equipment, loop resistance needs to be tested. For main loop resistance measurement of high voltage electrical products, related standards require that a main loop resistance tester capable of generating DC100A output current be used as a resistance measurement device to perform resistance measurement on the main loop of the high voltage electrical product. Therefore, the main loop resistance measuring capability of the main loop resistance tester adopted by each manufacturer needs to be verified, and whether the main loop resistance tester adopted by the manufacturer is qualified is verified by judging whether the resistance value measured by the main loop resistance tester adopted by the manufacturer meets the requirement of a standard test device. For the device for verifying the operation capability, the device is required to be convenient to transport, low in cost, convenient to operate and use and the like, and the characteristics have positive significance for the successful operation of the activity of the capability verification. The capacity verification resistance measurement test device in the prior art has the problems of overlarge volume, inconvenient transportation, high cost and troublesome operation, and is unfavorable for the development of capacity verification activities. Disclosure of utility model In order to solve the problems, the application provides the test device for verifying the measuring capability of the main loop resistance, which has reasonable structure, thereby realizing the test for verifying the measuring capability, effectively guaranteeing the verification result, having simple integral structure, low manufacturing cost, convenient transportation and convenient operation, being particularly suitable for standardized and consistent operation for verifying the standard capability and having good practicability. The technical scheme adopted by the utility model is as follows: A testing device for verifying resistance measurement capability of a main loop comprises a left copper bar and a right copper bar which are supported by an insulating support rod at intervals, wherein a current divider is arranged on the inner side of one copper bar, a vacuum arc-extinguishing chamber is arranged on the inner side of the other copper bar, one end of the current divider is connected and assembled on the copper bar, the other end of the current divider is connected to a movable contact end of the vacuum arc-extinguishing chamber through a soft connecting piece, a fixed contact end of the vacuum arc-extinguishing chamber is connected and assembled on the copper bar, the movable contact end and the fixed contact end of the vacuum arc-extinguishing chamber are kept normally closed, and a closed loop is formed between the two copper bars by the current divider and the vacuum arc-extinguishing chamber. As a further improvement of the above technical scheme: the copper bar shielding device further comprises a shielding layer shielding the upper part of the shunt, and the top end of the copper bar upwards penetrates through the shielding layer. The test device is accommodated in the box body, and the circumferential edge of the shielding layer is matched with the circumferential profiling of the inner wall surface of the box body. An insulating fixing part layer is arranged on the circumferential inner wall surface of the box body below the shielding layer, a supportin