Converter insulation detection function verification device and terminal

Abstract

The utility model relates to a device and binding post for verifying the insulation detection function of a current transformer, which comprises a casing, a load isolation switch K1, a DC ammeter A1 and a resistor array electrically connected in the casing, and a disc adjustable resistor comprising the resistor array. The load isolation switch K1 is connected in series with the disc adjustable resistor, the DC ammeter A1 and the disc adjustable resistor. The utility model has the advantages of reasonable design, compact structure and convenient use.

Description

Technical Field

[0001] This utility model relates to a device and connector for verifying the insulation detection function of a converter. Background Technology

[0002] Currently, there is no suitable testing fixture for verifying the insulation impedance detection capability of converters in high-power, long-term environments. There are no safety protection measures or quick switching mechanisms, which affects the convenience and safety of routine testing and prevents wire breakage due to thermal expansion and contraction.

[0003] This newly designed insulation testing device can effectively improve work efficiency and safety.

[0004] The converter in the power energy storage system verifies the operation of the converter protection function when leakage current is detected on the DC bus side using both DC positive to ground and DC negative to ground, and completes the insulation impedance detection capability test; therefore, this device was designed to safely and quickly adjust the leakage current.

[0005] Electrical components such as contacts pose safety hazards during use and can easily lead to loosening accidents.

[0006] This specially designed insulation impedance testing capability verification platform device mainly consists of three components: a resistance module, a range switching module, and a current measurement module. It can be adjusted within a wide range using a combination of adjustable resistors and a disc-mounted adjustable resistor, facilitating rapid and convenient impedance adjustment. Furthermore, it allows for real-time monitoring of the current during the adjustment process, enabling precise control.

[0007] In view of the above problems, this impedance adjustment device for insulation testing was designed for use in conjunction with the verification of insulation testing functions of high-power, long-term converter products.

[0008] However, when performing the test, it is necessary to switch between multiple resistor combinations. Especially during long-term measurements, heat may occur, particularly during high-power measurements. The clamp may expand and contract due to heat, causing the connector to loosen and leading to safety malfunctions. Utility Model Content

[0009] The technical problem this invention aims to solve is to provide a device and connector for verifying the insulation testing function of a converter. In view of the above problems, this impedance adjustment device for insulation testing was designed as a supporting experimental apparatus for verifying the insulation testing function of high-power converter products.

[0010] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0011] To enable multi-resistance measurements, a device for verifying the insulation detection function of a converter includes a housing; a load disconnect switch K1, a DC ammeter A1, and a resistor array are electrically connected inside the housing.

[0012] The resistor array includes disk-adjustable resistors;

[0013] The load disconnect switch K1 is connected in series with the adjustable disc resistor and the DC ammeter A1.

[0014] As a further improvement to the above technical solution:

[0015] For easy external connection, a universal selector switch K2 and / or a banana plug are provided on the housing.

[0016] The banana-shaped socket is electrically connected to the load disconnect switch K1;

[0017] The universal selector switch K2 has multiple ranges and is paired with a DC ammeter A1.

[0018] To ensure measurement stability, the resistor array 2 also includes a resistor R1 connected in series with the disk adjustable resistor 1;

[0019] To enable multi-resistance measurement, the disk-adjustable resistor 1 includes adjustable resistors R2 and R3 connected in series or in parallel;

[0020] The A terminal of the adjustable resistor R3 is electrically connected to the resistor R4;

[0021] Resistor R4 is electrically connected to resistor R5 at terminal B.

[0022] Resistor R6 is electrically connected to terminal C of resistor R5;

[0023] Resistor R7 is electrically connected to terminal D of resistor R6;

[0024] The E terminal of resistor R7 is electrically connected to resistor R8;

[0025] The F terminal of resistor R9 is electrically connected to resistor R9;

[0026] Resistor R9 is electrically connected to resistor R10 at its gate G.

[0027] Resistor R11 is electrically connected to terminal H of resistor R10;

[0028] The other end of resistor R11 is the L terminal;

[0029] The universal selector switch K2 allows you to choose one of the following electrical contacts: A, B, C, D, E, F, G, H, or L.

[0030] To prevent loosening and avoid wire detachment or loose connection due to prolonged use or thermal expansion and contraction, the disc adjustable resistor has a wire terminal.

[0031] The universal selector switch K2, the load disconnect switch K13, and / or the disc adjustable resistor have terminals; wires are inserted into the terminals.

[0032] An electrical wire consists of the wire core and the sheath that wraps around the wire core;

[0033] To achieve a fixed connection of the wire ends, the wire connector includes a connector base;

[0034] The connector has a front retainer and a rear retainer.

[0035] Nut seats are provided on the front and rear card slots respectively;

[0036] The front and rear nut seats of the front and rear nut seats are respectively equipped with corresponding rear bolts and front bolts;

[0037] A front inner cavity is provided in the front card holder;

[0038] A front n-pressure seat is provided at the top of the front inner cavity;

[0039] A spring A is provided between the top of the front inner cavity and the front n pressure seat;

[0040] A spring B is provided between the top of the rear inner cavity and the rear card slot;

[0041] The lower end of the rear bolt abuts against or drives the rear clamp to rise or fall via a rotating step;

[0042] The lower end of the front bolt abuts against or moves the front n-pressure seat up and down via a rotating step;

[0043] A rear inner cavity is provided in the rear card slot;

[0044] A through hole is provided between the front and rear card slots to connect the front and rear inner cavities;

[0045] An inverted L-shaped pressure seat is provided in the rear inner cavity;

[0046] The front inner cavity restricts the rotation of the front n pressure seats but allows the front n pressure seats to move freely up and down;

[0047] The rear inner cavity restricts the rotation of the inverted L-shaped pressure seat, but allows for the lifting and lowering of the inverted L-shaped pressure seat with a degree of freedom.

[0048] The front n-pressure seat is on the core;

[0049] A front process bottom hole A is provided below the front inner cavity;

[0050] The width of the front process bottom hole A is greater than the width of the front n pressure seat;

[0051] A rear process bottom hole B is provided below the rear inner cavity;

[0052] The bottom hole B of the subsequent process accommodates the downward-moving inverted L-shaped pressure seat;

[0053] The front end of the wire core abuts against the vertical surface of the inverted L-shaped pressure seat.

[0054] To ensure adequate contact, the diameter of the through hole in the center is larger than the outer diameter of the wire core but smaller than the outer diameter of the wire sheath.

[0055] To achieve positioning, the lower pressing surface of the inverted L-shaped pressure seat is an arc surface that contacts the upper surface of the wire core.

[0056] To prevent loosening, the wire core is bent into an L-shaped hook and hung in the bottom hole B of the subsequent process under the action of the inverted L-shaped pressure seat.

[0057] This insulation impedance testing capability verification device integrates rapid impedance switching and current display functions, making it safer and more convenient to use. The front panel integrates a load disconnect switch to control the loading and unloading of the entire circuit impedance, a 9-position universal selector switch to achieve rapid step adjustment of different resistance values, and a DC ammeter to monitor the circuit current in real time. The top of the enclosure integrates two adjustable disc resistors for fine-tuning the impedance within a small range. The dual-circuit design enables simultaneous verification of insulation impedance testing capability when the positive and negative circuit impedances decrease synchronously.

[0058] This device fills the gap in high-power, long-term environmental insulation impedance testing verification. It employs a simple and reliable insulation material structure and electrical control, using a universal changeover switch for coarse step impedance adjustment and a disc-mounted adjustable resistor for fine impedance adjustment. Nine aluminum-cased resistors and two disc-mounted adjustable resistors are connected in series for continuous adjustment. The DC+ / DC- dual-loop independent adjustment design allows verification of insulation testing capabilities when the insulation impedance of the positive and negative loops decreases simultaneously. An integrated DC ammeter display facilitates intuitive monitoring of leakage current during resistor adjustment. This provides safe, reliable, and convenient experimental conditions for verifying the insulation impedance testing capabilities of high-power, long-term environmental products.

[0059] This utility model solves the safety hazards that exist in the use of temporary electrical wiring, which can easily cause high-voltage electric shock accidents.

[0060] This insulation impedance testing capability verification device integrates fast impedance switching and current display functions, making it safer and more convenient to use.

[0061] The front panel integrates a load isolating switch K1 to control the loading and unloading of the entire circuit impedance, a 9-position universal selector switch to achieve rapid step adjustment of different resistance values, and a DC ammeter A1 to achieve real-time monitoring of the circuit current.

[0062] The top of the enclosure integrates two adjustable disc resistors, allowing for fine-tuning of the impedance within a small range.

[0063] This invention fills a gap in laboratory testing capabilities for inverter insulation impedance verification devices. It employs a simple and reliable insulating material structure and electrical control, using a universal changeover switch for coarse step adjustment of impedance and a disc-mounted adjustable resistor for fine adjustment. Nine aluminum-cased resistors and two disc-mounted adjustable resistors are connected in series for continuous adjustment. The DC+ / DC- dual-loop independent adjustment design allows verification of insulation testing capabilities when the insulation impedance of the positive and negative loops decreases simultaneously. An integrated DC ammeter A1 provides a convenient and intuitive way to monitor leakage current during resistor adjustment. This invention provides safe, reliable, and convenient experimental conditions for verifying the insulation impedance testing capabilities of laboratory environmental products.

[0064] This invention employs a dual-circuit design to simultaneously verify the insulation impedance detection capability when the positive and negative circuit impedances decrease synchronously.

[0065] This utility model is reasonably designed, low in cost, sturdy and durable, safe and reliable, simple to operate, time-saving and labor-saving, cost-saving, compact in structure and easy to use. Attached Figure Description

[0066] Figure 1 This is a schematic diagram of the structure of the adjustable disc resistor of this utility model.

[0067] Figure 2 This is a circuit diagram of the present invention.

[0068] Figure 3 This is a schematic diagram of the connector structure of this utility model.

[0069] Figure 4 This is a schematic diagram of the central through hole structure of this utility model.

[0070] Figure 5 This is a schematic diagram of the inverted L-shaped pressure seat of this utility model.

[0071] The components include: 1. Disc-type adjustable resistor; 2. Resistor array; 3. Load isolation switch K1; 4. Universal selector switch K2; 5. DC ammeter A1; 6. Banana socket; 11. Wire sheath; 12. Wire core; 13. Terminal block; 14. Connector; 15. Front retainer; 16. Rear retainer; 17. Nut seat; 18. Rear bolt; 19. Front inner cavity; 20. Rear inner cavity; 21. Front n-shaped pressure seat; 22. Central through hole; 23. Front bolt; 24. Inverted L-shaped pressure seat; 25. Front process bottom hole A; 26. Rear process bottom hole B. Detailed Implementation

[0072] like Figure 1-5 ,like Figure 1As shown, the device and wiring terminals for verifying the inverter insulation detection function in this embodiment include a housing; a load disconnect switch K13, a DC ammeter A15 and a resistor array 2 are electrically connected inside the housing;

[0073] Resistor array 2 includes a disk-adjustable resistor 1;

[0074] The load disconnect switch K13 is connected in series with the DC ammeter A15 and the disc adjustable resistor 1.

[0075] The housing is equipped with a universal selector switch K24 and / or a banana plug 6.

[0076] Banana socket 6 is electrically connected to load disconnect switch K13;

[0077] One end of the universal selector switch K24 is equipped with a DC ammeter A15.

[0078] To maintain the stability of the detection circuit and achieve voltage division, the resistor array 2 also includes a resistor R1 connected in series with the disk adjustable resistor 1; the disk adjustable resistor 1 includes adjustable resistors R2 and R3 connected in series or in parallel.

[0079] Preferably, the disc-adjustable resistor 1 includes an adjustable resistor R3;

[0080] The A terminal of the adjustable resistor R3 is electrically connected to the resistor R4;

[0081] Resistor R4 is electrically connected to resistor R5 at terminal B.

[0082] Resistor R6 is electrically connected to terminal C of resistor R5;

[0083] Resistor R7 is electrically connected to terminal D of resistor R6;

[0084] The E terminal of resistor R7 is electrically connected to resistor R8;

[0085] The F terminal of resistor R9 is electrically connected to resistor R9;

[0086] Resistor R9 is electrically connected to resistor R10 at its gate G.

[0087] Resistor R11 is electrically connected to terminal H of resistor R10;

[0088] The other end of resistor R11 is the L terminal;

[0089] In practical use, the universal selector switch K24 can select one of the following electrical contacts: A, B, C, D, E, F, G, H, or L.

[0090] The load disconnect switch K13 is electrically connected to the universal selector switch K24;

[0091] To prevent wires from becoming loose due to heat, vibration, or other reasons, as a safety improvement, the universal selector switch K24, the disc-loadable isolating switch K13, and / or the disc-adjustable resistor 1 have terminals 13; thereby enabling signal input and output.

[0092] A wire is inserted into connector 13;

[0093] The wire includes a conductor 12 and a sheath 11 that wraps around the conductor 12;

[0094] The terminal block 13 includes a connector 14; as a connecting part, it can be understood as a carrier of electrical components.

[0095] A front retainer 15 and a rear retainer 16 are provided on the connector 14.

[0096] In order to solve the problems of electrical safety and convenient operation, as an improvement, this utility model believes that the loosening of traditional wire ends is often due to the use of only one point of wire end positioning, which is prone to loosening. Therefore, it is necessary to bend or wrap the wire end, but the operation is complicated.

[0097] This utility model uses two-point positioning. The second point can be pressed on the wire sheath to achieve auxiliary fixation without causing local electrical loss.

[0098] Nut seats 17 are respectively provided on the front card holder 15 and the rear card holder 16;

[0099] The front bracket 15 and the rear bracket 16 are respectively provided with the nut seat 17 and the corresponding rear bolt 18 and front bolt 23; the wire end or wire sheath is fixed by rotating and raising the bolts.

[0100] A front inner cavity 19 is provided in the front card holder 15 to facilitate threading.

[0101] A front n-pressure seat 21 is provided at the top of the front inner cavity 19; thus, it sits on the cable and is pressed down and fixed.

[0102] Preferably, a spring A is provided between the top of the front inner cavity 19 and the front n pressure seat 21;

[0103] A spring B is provided between the top of the rear inner cavity 20 and the rear card seat 16;

[0104] This facilitates repositioning and also prevents loosening.

[0105] Of course, a T-head can also be provided at the lower end of the bolt. The T-head is round, and a T-slot is matched on the top of the front n-pressure seat 21 and the rear card seat 16. The slot is round, thereby realizing the lifting and lowering, which is also the protection range.

[0106] The lower end of the rear bolt 18 abuts against or drives the rear bracket 16 to rise or fall via the rotating step;

[0107] The lower end of the front bolt 23 abuts against or drives the front n pressure seat 21 to rise or fall via the rotating step;

[0108] A rear inner cavity 20 is provided in the rear card holder 16 to accommodate wire ends;

[0109] A through hole 22 is provided between the front card holder 15 and the rear card holder 16 to connect the front inner cavity 19 and the rear inner cavity 20, thereby facilitating wire threading.

[0110] An inverted L-shaped pressure seat 24 is provided in the rear inner cavity 20;

[0111] The front inner cavity 19 restricts the rotation of the front n-pressure seat 21, but allows the front n-pressure seat 21 to move freely up and down.

[0112] The rear inner cavity 20 restricts the rotation of the inverted L-shaped pressure seat 24, but allows the inverted L-shaped pressure seat 24 to move freely in lifting and lowering.

[0113] The front n-pressure seat 21 sits on the wire core 12, thus achieving two-point fixation.

[0114] To achieve further fixation, a front process bottom hole A25 is provided below the front inner cavity 19;

[0115] The width of the front process bottom hole A25 is greater than the width of the front n pressure seat 21; thus, the wire can be bent, thereby achieving better compression.

[0116] A rear process bottom hole B26 is provided below the rear inner cavity 20;

[0117] The bottom hole B26 of the subsequent process accommodates the downward-moving inverted L-shaped pressure seat 24;

[0118] The front end of the wire core 12 abuts against the vertical surface of the inverted L-shaped pressure seat 24. This allows the wire end to be pressed down and completely deformed, achieving not only compression but also deformation, thus providing better anti-loosening.

[0119] Among them, the rear bracket 16 and / or the rear bolt 18 serve as the input or output end, and are connected to the main structure of the load disconnect switch K13 and / or the disc adjustable resistor 1. The main structure is an existing conventional mechanism, and the load disconnect switch K13 can be a two-input, two-output terminal.

[0120] The diameter of the central through hole 22 is larger than the outer diameter of the wire core 12 and smaller than the outer diameter of the wire sheath 11.

[0121] The inverted L-shaped pressure seat 24 has an arc surface that contacts the upper surface of the wire core 12, thereby preventing pressure deviation.

[0122] Under the action of the inverted L-shaped pressure seat 24, the wire core 12 is bent into an L-shaped hook and hung on the bottom hole B26 of the subsequent process.

[0123] like Figure 1-5 The device of this utility model has the following appearance: the main body is designed as a chassis, the front panel has a two-way impedance selection switch and a leakage current detection instrument, and the top has two-way disc-type adjustable resistors; the overall dimensions of the device (L*W*H) are approximately 400*390*160mm. The disc-type adjustable resistors can be 25W, 50W, 100W, 300W / 500W; suitable for resistance values ​​above 10Ω.

[0124] The load isolation switch K1 in the front panel of this utility model is used to control the on / off state of the main circuit and complete the loading and unloading of impedance; the universal changeover switch, together with the resistor array module and the disc adjustable resistor, realizes the coarse and fine adjustment of impedance; the ammeter is used to monitor the real-time magnitude of the circuit current during the impedance adjustment process.

[0125] This utility model is described in detail for the purpose of making the disclosure clearer, and the prior art will not be listed one by one.

[0126] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. It is obvious to those skilled in the art that multiple technical solutions of this utility model can be combined. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model. All technical contents not described in detail in this utility model are publicly known technologies.

Claims

1. A device for verifying the insulation detection function of a converter, characterized in that: Includes a housing; the housing is electrically connected to a load disconnect switch K1 (3), a DC ammeter A1 (5), and a resistor array (2); The resistor array (2) includes a disk-adjustable resistor (1); The load disconnect switch K1 (3) is connected in series with the disc adjustable resistor (1) and the DC ammeter A1 (5); a universal selector switch K2 (4) and / or a banana socket (6) are provided on the housing.

2. The device for verifying the insulation detection function of a converter according to claim 1, characterized in that: The banana socket (6) is electrically connected to the load disconnect switch K1 (3); The load isolating switch K1 (3) is electrically connected to the universal selector switch K2 (4).

3. The device for verifying the insulation detection function of a converter according to claim 2, characterized in that: One end of the universal selector switch K2 (4) is equipped with a DC ammeter A1 (5).

4. The device for verifying the insulation testing function of a converter according to claim 1, characterized in that: The resistor array (2) also includes a resistor R1 connected in series with the disk adjustable resistor (1); The disc-shaped adjustable resistor (1) includes adjustable resistors R2 and R3 connected in series or in parallel.

5. The device for verifying the insulation detection function of a converter according to claim 4, characterized in that: The A terminal of the adjustable resistor R3 is electrically connected to the resistor R4; Resistor R4 is electrically connected to resistor R5 at terminal B. Resistor R6 is electrically connected to terminal C of resistor R5; Resistor R7 is electrically connected to terminal D of resistor R6; The E terminal of resistor R7 is electrically connected to resistor R8; The F terminal of resistor R9 is electrically connected to resistor R9; Resistor R9 is electrically connected to resistor R10 at its gate G. Resistor R11 is electrically connected to terminal H of resistor R10; The other end of resistor R11 is the L terminal; The universal selector switch K2(4) selects one of the electrical contacts: A, B, C, D, E, F, G, H, or L.

6. The device for verifying the insulation testing function of a converter according to any one of claims 1-5, characterized in that: The universal selector switch K2 (4), the load disconnect switch K13 (3) and / or the disc adjustable resistor (1) have terminals (13). The connector (13) has a wire inserted; The wire includes a conductor (12) and a sheath (11) that wraps around the conductor (12). The connector (13) includes a connector (14); A front card slot (15) and a rear card slot (16) are provided on the connecting seat (14). Nut seats (17) are provided on the front card holder (15) and the rear card holder (16); The nut seat (17) of the front bracket (15) and the nut seat (17) of the rear bracket (16) are respectively provided with the corresponding rear bolt (18) and front bolt (23). A front inner cavity (19) is provided in the front card holder (15); A front n pressure seat (21) is provided at the top of the front inner cavity (19); A spring A is provided between the top of the front inner cavity (19) and the front n pressure seat (21); A spring B is provided between the top of the rear inner cavity (20) and the rear card seat (16); The lower end of the rear bolt (18) abuts against or drives the rear bracket (16) to rise or fall through the rotating step; The lower end of the front bolt (23) abuts against or drives the front n pressure seat (21) to rise or fall via the rotating step; A rear inner cavity (20) is provided in the rear card holder (16); A through hole (22) is provided between the front card holder (15) and the rear card holder (16) to connect the front inner cavity (19) and the rear inner cavity (20). An inverted L-shaped pressure seat (24) is provided in the rear inner cavity (20); The front inner cavity (19) restricts the rotation of the front n pressure seat (21) and allows the front n pressure seat (21) to move freely up and down; The rear inner cavity (20) restricts the rotation of the inverted L-shaped pressure seat (24) and allows the inverted L-shaped pressure seat (24) to move freely in both directions. The front n-pressure seat (21) sits on the wire core (12); A front process bottom hole A (25) is provided below the front inner cavity (19); The width of the front process bottom hole A (25) is greater than the width of the front n pressure seat (21); A rear process bottom hole B (26) is provided below the rear inner cavity (20); The bottom hole B (26) of the post-processing hole accommodates the downward inverted L-shaped pressure seat (24). The front end of the wire core (12) abuts against the vertical surface of the inverted L-shaped pressure seat (24).

7. The device for verifying the insulation detection function of a converter according to claim 6, characterized in that: The diameter of the through hole (22) is larger than the outer diameter of the core (12) and smaller than the outer diameter of the sheath (11).

8. The device for verifying the insulation detection function of a converter according to claim 6, characterized in that: The underside of the inverted L-shaped pressure seat (24) is an arc surface that contacts the upper surface of the wire core (12).

9. The device for verifying the insulation detection function of a converter according to claim 6, characterized in that: The wire core (12) is bent into an L-shaped hook and hung on the bottom hole B (26) of the rear process under the action of the inverted L-shaped pressure seat (24).

10. A connector, characterized in that: Including connector (14); A front card slot (15) and a rear card slot (16) are provided on the connecting seat (14). Nut seats (17) are provided on the front card holder (15) and the rear card holder (16); The nut seat (17) of the front bracket (15) and the nut seat (17) of the rear bracket (16) are respectively provided with the corresponding rear bolt (18) and front bolt (23). A front inner cavity (19) is provided in the front card holder (15); A front n pressure seat (21) is provided at the top of the front inner cavity (19); A spring A is provided between the top of the front inner cavity (19) and the front n pressure seat (21); A spring B is provided between the top of the rear inner cavity (20) and the rear card seat (16); The lower end of the rear bolt (18) abuts against or drives the rear bracket (16) to rise or fall through the rotating step; The lower end of the front bolt (23) abuts against or drives the front n pressure seat (21) to rise or fall via the rotating step; A rear inner cavity (20) is provided in the rear card holder (16); A through hole (22) is provided between the front card holder (15) and the rear card holder (16) to connect the front inner cavity (19) and the rear inner cavity (20). An inverted L-shaped pressure seat (24) is provided in the rear inner cavity (20); The front inner cavity (19) restricts the rotation of the front n pressure seat (21) and allows the front n pressure seat (21) to move freely up and down; The rear inner cavity (20) restricts the rotation of the inverted L-shaped pressure seat (24) and allows the inverted L-shaped pressure seat (24) to move freely in both directions. The front n-pressure seat (21) sits on the wire core (12); A front process bottom hole A (25) is provided below the front inner cavity (19); The width of the front process bottom hole A (25) is greater than the width of the front n pressure seat (21); A rear process bottom hole B (26) is provided below the rear inner cavity (20); The bottom hole B (26) of the post-processing hole accommodates the downward inverted L-shaped pressure seat (24). The front end of the wire core (12) abuts against the vertical surface of the inverted L-shaped pressure seat (24).

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