Generator stator winding hand-wrapped insulation to ground potential anti-interference safety measuring device

Abstract

The utility model discloses a generator stator winding hand bag insulation earth potential anti -interference safety measuring device belongs to high tension test technical field, including the high -voltage insulating pole and the insulation handle of mutual connection, one end of high -voltage insulating pole is equipped with the measuring probe, and the one end connection of built -in wire in the inside of measuring probe and high -voltage insulating pole, and the other end of built -in wire is connected with one end of insulation anti -interference wire through first lead -out terminal post, and the other end of insulation anti -interference wire is connected with anti -interference microammeter. Can carry out the optimization of detection precision, anti -interference, safety performance to the original generator stator winding hand bag insulation earth potential measurement, and further realized the reliable development of the test of hand bag insulation earth potential measurement, to reach the purpose of detecting stator end hand bag insulation compactness and relative insulation strength, solve the low precision of on -the -spot testing device, easily be interfered with, and the problem of poor safety.

Description

Technical Field

[0001] This utility model belongs to the field of high voltage testing technology, specifically relating to a safety measurement device for anti-interference of generator stator winding hand-insulated ground potential. Background Technology

[0002] Currently, large generator sets often exhibit various defects at their ends due to unreasonable design, substandard material quality, and poor manufacturing processes, particularly in the insulation of the lead wires, water and electricity connection cones, and stator coil end insulation. These parts, when subjected to thermal and mechanical stresses, may experience surface discharge, grounding, or phase-to-phase short circuits, severely impacting the safe and stable operation of the generator set. Since the AC / DC withstand voltage method is insufficient to detect insulation defects in these areas, the potential shift method offers a more targeted approach. Therefore, conducting appropriate tests on generator stator end insulation defects aims to assess the density and relative insulation strength of the stator end insulation. Because field stator winding insulation tests require personnel to be close to high-voltage live parts, and high-precision measuring instruments such as voltmeters and microammeters are exposed to high field strength, using a generator stator winding insulation-to-ground potential anti-interference safety measuring device ensures safety, improves the anti-interference performance of the measuring equipment, and guarantees measurement accuracy.

[0003] Although existing generator hand-insulation-to-ground potential testing devices can test the ground potential of some hand-insulation components, they suffer from problems such as low equipment accuracy, susceptibility to interference, and poor safety during testing due to the lack of consideration for equipment accuracy during on-site testing, interference caused by high field strength when applying DC, and the need for corresponding isolation measures between high voltage and test personnel during actual measurement. Utility Model Content

[0004] In view of the above-mentioned shortcomings in the prior art, the generator stator winding hand-insulated ground potential anti-interference safety measurement device provided by this utility model solves the problems of low accuracy, susceptibility to interference and poor safety of field testing devices.

[0005] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows: a generator stator winding hand-insulated ground potential anti-interference safety measuring device, including a high-voltage insulating rod, one end of which is equipped with a measuring probe, which is connected to one end of an internal wire inside the high-voltage insulating rod, and the other end of the internal wire is connected to one end of an insulating anti-interference wire through a first lead-out terminal, and the other end of the insulating anti-interference wire is connected to an anti-interference microammeter.

[0006] Furthermore, a built-in voltage divider resistor is provided in the built-in wire.

[0007] Furthermore: the voltage divider resistor includes a first voltage divider resistor and a second voltage divider resistor connected in series.

[0008] Furthermore, a second lead-out terminal is provided at the end position where one end of the second voltage divider resistor is connected to the first voltage divider resistor.

[0009] Furthermore, a third lead-out terminal is provided at the other end of the second voltage divider resistor.

[0010] Furthermore, the built-in wires are connected to an anti-interference high-precision voltmeter via the second and third lead-out terminals.

[0011] Furthermore: the anti-interference microammeter is housed within a metal shielding enclosure.

[0012] Furthermore: an insulating handle is fixedly installed at the other end of the high-voltage insulating rod.

[0013] Furthermore: the model of the anti-interference high-precision voltmeter is UT892.

[0014] Furthermore: the anti-interference microammeter is model SWB-IV.

[0015] The beneficial effects of this utility model are as follows: (1) This utility model provides a generator stator winding hand-wrapped insulation to ground potential anti-interference safety measurement device. Through a complete set of devices consisting of a measuring probe, a high-voltage insulating rod, a built-in voltage divider resistor, lead-out terminals, an anti-interference high-precision voltmeter, an anti-interference microammeter, and an insulating grip, the detection accuracy, anti-interference, and safety performance of the original generator stator winding hand-wrapped insulation to ground potential measurement can be optimized. This enables the reliable conduct of hand-wrapped insulation to ground potential measurement tests, thereby achieving the purpose of detecting the density and relative insulation strength of the stator end hand-wrapped insulation and solving the problems of low accuracy, susceptibility to interference, and poor safety of on-site testing devices.

[0016] (2) This utility model connects to an anti-interference high-precision voltmeter by extending the lead-out terminal, and reserves a functional verification path to ensure the convenience of on-site testing.

[0017] (3) This utility model introduces anti-interference technology and designs a shielded structure for the outer circuit that is susceptible to high field strength interference, which ensures the accuracy of the data during equipment measurement and provides strong data support for the subsequent status assessment of the stator winding. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the generator stator winding hand-insulated ground potential anti-interference safety measurement device of this utility model.

[0019] The components include: 1. Measuring probe; 2. Built-in wire; 3. First voltage divider resistor; 4. Second voltage divider resistor; 5. Second lead-out terminal; 6. Anti-interference high-precision voltmeter; 7. Third lead-out terminal; 8. First lead-out terminal; 9. Insulated anti-interference wire; 10. Anti-interference microammeter; 11. High-voltage insulating rod; 12. Insulated handle. Detailed Implementation

[0020] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All inventions utilizing the concept of this utility model are protected.

[0021] like Figure 1 As shown, in one embodiment of this utility model, the generator stator winding hand-held insulation ground potential anti-interference safety measurement device includes a high-voltage insulating rod 11 and an insulating handle 12 connected to each other. One end of the high-voltage insulating rod 11 is provided with a measuring probe 1, which is connected to one end of the built-in wire 2 inside the high-voltage insulating rod 11. The other end of the built-in wire 2 is connected to one end of the insulating anti-interference wire 9 through the first lead-out terminal 8. The other end of the insulating anti-interference wire 9 is connected to the anti-interference microammeter 10.

[0022] The measuring probe 1, acting as an input point, contacts the insulating handpiece to collect a potential signal, which is then used to input an electrical signal. This signal is fed into the internal conductor 2, which transmits the signal to the anti-interference microammeter 10 on the insulated anti-interference conductor 9, forming a signal path. The high-voltage insulating rod 11, serving as the external fastener of the internal conductor 2, provides voltage resistance and anti-interference capabilities. For everyday use, it is required to be at least 100cm long and withstand a voltage of 20kV to protect internal connections and operators. The probe connects to the anti-interference microammeter 10 via the first lead-out terminal 8 for easy equipment portability. The insulated anti-interference conductor 9 is a sufficiently strong insulated conductor to prevent interference current from flowing through it due to strong electric fields.

[0023] The built-in wire 2 is equipped with a built-in voltage divider resistor, including a first voltage divider resistor 3 and a second voltage divider resistor 4 connected in series.

[0024] In this embodiment, the voltage divider resistors are used to protect the overall circuit structure and for voltage division measurement, satisfying R1=R2=50MΩ.

[0025] The second voltage divider resistor 4 has a second lead-out terminal 5 at one end connected to the first voltage divider resistor 3, and a third lead-out terminal 7 at the other end. The built-in wire 2 is connected to the anti-interference high-precision voltmeter 6 through the second lead-out terminal 5 and the third lead-out terminal 7.

[0026] In this embodiment, an anti-interference high-precision voltmeter 6 is connected via the second lead-out terminal 5 and the third lead-out terminal 7. This allows for the determination of the continuity and other connection status of the internal circuits of the equipment, verifying the effectiveness and safety of the circuit. The anti-interference high-precision voltmeter 6, as a measuring device for the insulation-to-ground potential of the hand-held device, has a measurement accuracy of 0.5 class and should be installed in a metal shielded housing. The housing should be corona-proof.

[0027] The anti-interference high-precision voltmeter 6 is model UT892, and the anti-interference microammeter 10 is model SWB-IV.

[0028] The working process of this utility model system is as follows: the measuring probe 1, as the input point, contacts the insulated hand bag to collect an electrical signal. The electrical signal passes through the built-in wire 2, first through the first voltage divider resistor 3, then through the second voltage divider resistor 4 and the insulated anti-interference wire 9, and finally the electrical signal returns to the grounding point through the anti-interference microammeter 10, forming a loop and completing the current measurement.

[0029] This invention employs an integrated approach, combining most of the main components into one unit and reserving functional verification pathways to ensure convenience during on-site testing. Secondly, it clearly defines a safety structure, specifying core safety parameters such as the equipment's withstand voltage rating and distance from energized surfaces, ensuring safety during on-site testing. Thirdly, it introduces anti-interference technology, designing a shielded structure for the external circuit, which is susceptible to high-field-strength interference, ensuring the accuracy of data during equipment measurements and providing strong data support for subsequent stator winding condition assessment.

[0030] The beneficial effects of this utility model are as follows: (1) This utility model provides a generator stator winding hand-wrapped insulation to ground potential anti-interference safety measurement device. Through a complete set of devices consisting of a measuring probe, a high-voltage insulating rod, a built-in voltage divider resistor, lead-out terminals, an anti-interference high-precision voltmeter, an anti-interference microammeter, and an insulating grip, the detection accuracy, anti-interference, and safety performance of the original generator stator winding hand-wrapped insulation to ground potential measurement can be optimized. This enables the reliable conduct of hand-wrapped insulation to ground potential measurement tests, thereby achieving the purpose of detecting the density and relative insulation strength of the stator end hand-wrapped insulation and solving the problems of low accuracy, susceptibility to interference, and poor safety of on-site testing devices.

[0031] (2) This utility model connects to an anti-interference high-precision voltmeter by extending the lead-out terminal, and reserves a functional verification path to ensure the convenience of on-site testing.

[0032] (3) This utility model introduces anti-interference technology and designs a shielded structure for the outer circuit that is susceptible to high field strength interference, which ensures the accuracy of the data during equipment measurement and provides strong data support for the subsequent status assessment of the stator winding.

[0033] In the description of this invention, it should be understood that the terms "center," "thickness," "upper," "lower," "horizontal," "top," "bottom," "inner," "outer," and "radial," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying the relative importance or the number of technical features implicitly specified. Therefore, a feature defined by "first," "second," and "third" may explicitly or implicitly include one or more of that feature.

Claims

1. A generator stator winding hand-insulated ground potential anti-interference safety measuring device, characterized in that, The high-voltage insulating rod (11) is equipped with a measuring probe (1) at one end. The measuring probe (1) is connected to one end of the built-in wire (2) inside the high-voltage insulating rod (11). The other end of the built-in wire (2) is connected to one end of the insulating anti-interference wire (9) through the first lead-out terminal (8). The other end of the insulating anti-interference wire (9) is connected to the anti-interference microammeter (10).

2. The generator stator winding hand-insulated ground potential anti-interference safety measuring device according to claim 1, characterized in that, An internal voltage divider resistor is provided in the internal wire (2).

3. The generator stator winding hand-insulated ground potential anti-interference safety measuring device according to claim 2, characterized in that, The voltage divider resistors include a first voltage divider resistor (3) and a second voltage divider resistor (4) connected in series.

4. The generator stator winding hand-insulated ground potential anti-interference safety measuring device according to claim 3, characterized in that, The second lead-out terminal (5) is provided at the end of the second voltage divider resistor (4) that is connected to the first voltage divider resistor (3).

5. The generator stator winding hand-insulated ground potential anti-interference safety measuring device according to claim 4, characterized in that, The other end of the second voltage divider resistor (4) is provided with a third lead-out terminal (7).

6. The generator stator winding hand-insulated ground potential anti-interference safety measuring device according to claim 5, characterized in that, The built-in wire (2) is connected to the anti-interference high-precision voltmeter (6) through the second lead-out terminal (5) and the third lead-out terminal (7).

7. The generator stator winding hand-insulated ground potential anti-interference safety measuring device according to claim 1, characterized in that, The anti-interference microammeter (10) is installed inside the metal shielding shell.

8. The generator stator winding hand-insulated ground potential anti-interference safety measuring device according to claim 1, characterized in that, An insulating handle (12) is fixedly installed at the other end of the high-voltage insulating rod (11).

9. The generator stator winding hand-insulated ground potential anti-interference safety measuring device according to claim 6, characterized in that, The model of the anti-interference high-precision voltmeter (6) is UT892.

10. The generator stator winding hand-insulated ground potential anti-interference safety measuring device according to claim 1, characterized in that, The anti-interference microammeter (10) is model SWB-IV.

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