Batch test device and test method suitable for temperature measurement resistors at key parts of generator

Abstract

The invention discloses a batch test device and test method suitable for temperature measurement resistors at key parts of a generator, and the device comprises a power conversion module which is used for converting an external AC power supply into a DC power supply; the resistance measurement and display module is powered by the direct-current power supply and is used for measuring and displaying the resistance value of the accessed resistor; the lead access module is used for accessing a temperature measurement resistor lead; and the switching module is connected between the lead access module and the resistance measurement display module and is used for carrying out combined switching on the leads accessed by the lead access module so as to form different resistance measurement loops. The problems that in the prior art, temperature measuring resistor testing is long in consumed time, high in strength and large in needed manpower are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of testing tooling of large-scale hydropower plants, in particular to a batch testing device and testing method suitable for temperature measuring resistors of key parts of a generator. BACKGROUND

[0002] In a large-scale hydropower plant, the hydro-generator unit is subjected to turn-by-turn unit overhaul. The hydro-generator unit subjected to overhaul is subjected to overall preventive replacement of temperature measuring resistors of four bearing pads (upper guide pad, lower guide pad, push guide pad and water guide pad) of the hydro-generator. One large-scale hydro-generator unit often has hundreds or even thousands of PT100 measuring points distributed in various key parts of the generator.

[0003] At present, the temperature of the four bearing pads of the hydro-generator is usually measured by using three-wire platinum resistor PT100. Each temperature measuring platinum resistor has a lead (one main and one backup) connected to a temperature measuring terminal box. Before replacement, the resistance of each temperature measuring platinum resistor needs to be measured and recorded. Therefore, a large amount of detection work is faced during the overhaul of the hydro-generator unit or the overall replacement of the resistors.

[0004] In addition, the temperature measuring resistors of the four bearing pads not only have leads, but are also basically installed in oil tanks and then fixed on the four bearing pads. Due to the small space and the surrounding equipment, the temperature measuring resistor body is usually measured after installation to prevent the leads of the temperature measuring resistor from being damaged during installation.

[0005] The traditional method uses a high-precision multimeter to test one by one, which is time-consuming, labor-intensive, and can only test two leads at a time. The resistance test of the resistors replaced once may require several people to work for several days, which prolongs the construction period and increases the cost of unit shutdown. SUMMARY

[0006] Therefore, the present application aims to provide a batch testing device and testing method suitable for temperature measuring resistors of key parts of a generator, so as to solve the problems of long time consumption, high intensity and large number of required manpower in the temperature measuring resistor test in the prior art.

[0007] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions: According to an aspect of the present application, a batch testing device suitable for temperature measuring resistors of key parts of a generator is provided, comprising: a power conversion module for converting an external AC power supply into a DC power supply; a resistance measurement and display module powered by the DC power supply for measuring and displaying the resistance value of the connected resistor; a lead connection module for connecting the temperature measuring resistor leads; An adapter module is connected between the lead wire access module and the resistance measurement and display module, and is used to combine and connect the leads connected to the lead wire access module to form different resistance measurement circuits.

[0008] The device provided in this application, with its modular design integrating power conversion, lead connection, loop conversion, and measurement display, fundamentally changes the traditional single-point testing mode of multimeters. It achieves integrated and batch operation of the testing process, significantly reducing pre-test preparation time and the complexity of connecting different devices, providing a foundation for large-scale batch testing and greatly improving overall testing efficiency.

[0009] A further technical solution includes an anomaly detection module, which is used to reject connection resistors that do not meet preset conditions. This anomaly detection module makes testing more intelligent, directly informing testing personnel of defective products for timely replacement and improving the efficiency of maintenance work.

[0010] A further technical solution is that the anomaly detection module includes a storage module, a judgment module, and an alarm module. The storage module acquires the resistance value data displayed by the resistance measurement and display module and transmits the resistance value data to the judgment module. The judgment module compares the resistance value data with preset qualified resistance value data and transmits the judgment result to the alarm module. The alarm module can promptly send non-compliant data alerts to the testers, preventing human calculation errors caused by testers visually measuring data and then manually calculating to find abnormal resistances.

[0011] A further technical solution is that, since the lead connection module uses spring terminals, the insertion and removal operations are faster and less strenuous compared to traditional screw terminals, enabling rapid connection and disconnection of test leads, further reducing operational intensity and shortening the test cycle of a single resistor. This is particularly suitable for batch testing scenarios that require frequent lead replacement.

[0012] A further technical solution is that the adapter module is a terminal block, which is provided with multiple sets of configurable shorting elements. Different resistance measurement circuits can be formed by configuring these shorting elements. Because the adapter module uses a terminal block with shorting elements, such as an RTD terminal block with pairs of shorted elements, it provides extremely high testing flexibility.

[0013] A further technical solution is that the terminal block is an RTD adapter terminal block, with the terminals of the RTD adapter terminal block shorted in pairs via jumper tabs. The use of a high-precision (0.5%) LCD digital display resistance tester ensures the accuracy and intuitiveness of the measurement results, providing clear readings and enabling quick determination of whether the resistance value of the temperature measuring resistor is within the acceptable range, thus ensuring the quality of equipment maintenance.

[0014] Further, the resistance measurement display module is an LCD liquid crystal digital display resistance tester, which has a measurement range of 0-200Ω and a measurement accuracy of not less than 0.5%. Since the LCD liquid crystal digital display resistance tester with high accuracy (0.5%) is used, the accuracy and intuitiveness of the measurement result are ensured, the reading is clear, and it can be quickly judged whether the resistance value of the temperature measurement resistor is within the qualified range, thereby ensuring the quality of equipment maintenance.

[0015] Further, the power conversion module is an AC / DC power module, which is used to convert 220V alternating current into 24V direct current, thereby improving the operation safety.

[0016] Further, the power conversion module is an AC / DC power module, which is used to convert 220V alternating current into 24V direct current, thereby improving the operation safety.

[0017] Another aspect of the embodiment of the application is to provide a method for batch testing of temperature measurement resistors using any of the devices, which comprises the following steps: a device power-on step: connecting an external alternating current power supply to the device; a lead access step: connecting the lead of the temperature measurement resistor to be tested to the lead access module; a loop configuration and measurement step: configuring a measurement loop through the adapter module and reading the resistance value of the current measurement loop on the resistance measurement display module; a cycle test step: after completing the test of the current temperature measurement resistor, removing the lead of the temperature measurement resistor to be tested from the lead access module, connecting the lead of the next temperature measurement resistor to be tested, and repeating the above steps.

[0018] Since the above-mentioned testing method uses the device, the complex resistance test process is streamlined and standardized. The operator only needs to perform the cycle of "power on-access-configuration / reading-switching" according to the steps, and all tests can be completed, thereby reducing the dependence on the technical level of the operator, reducing the possibility of human error, and ensuring the efficiency and reliability of the test process.

[0019] In the above method, the resistance measurement loop is configured through the adapter module by setting a configurable shorting member on the terminal block of the adapter module, and different resistance measurement loops are configured by configuring the shorting member. Since this method uses the adapter module to perform multiple tests without a fixed wiring sequence, the operation process is further liberated, errors caused by memory or complex wiring sequence are avoided, and truly fast and error-free batch testing is achieved.

[0020] Further, an abnormality detection step is further included for eliminating the access resistance that does not meet the preset condition. The qualified and unqualified data records of the detection data are added to form a closed-loop management of the test work, ensuring the traceability of each measuring point data and providing data support for the equipment state maintenance.

[0021] The batch testing device and testing method for temperature resistance of key parts of a power generator disclosed in the application can bring beneficial effects, which include but are not limited to: 1. Integrated device structure: The device provided in the application adopts a modular design integrating power supply conversion, lead access, loop switching and measurement display, which simplifies the test wiring process, reduces the amount of manual operation and reduces the risk of wiring errors.

[0022] 2. High operation safety: The safety of personnel operation is ensured by reducing the amount of manual wiring work and isolating the power supply from the wiring.

[0023] 3. Good portability: The device has a small size and a small weight, is suitable for operation in various small spaces and can meet the needs of on-site measurement of temperature resistance of four bearing temperature resistance.

[0024] 4. Strong detection accuracy: The device can directly feed back the test results (qualified or unqualified) to the tester, avoiding errors caused by manual calculation; and has a certain intelligence. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A schematic diagram of the batch testing device for temperature resistance of key parts of a power generator according to an embodiment of the application is shown; Figure 2 A schematic diagram of the batch testing device for temperature resistance of key parts of a power generator according to an embodiment of the application is shown; Figure 3 A schematic diagram of the batch testing device for temperature resistance of key parts of a power generator according to an embodiment of the application is shown; Figure 4 A schematic diagram of the batch testing device for temperature resistance of key parts of a power generator according to an embodiment of the application is shown.

[0026] Illustration: 1-LCD liquid crystal digital display resistance tester, 2-spring terminal, 3-RID switching terminal row, 4-power module, 5-power switching terminal row, 6-lead A, 7-lead B, 8-lead C, 9-first LCD liquid crystal digital display resistance tester, 10-second LCD liquid crystal digital display resistance tester, 11-third LCD liquid crystal digital display resistance tester, 12-abnormality detection module. DETAILED DESCRIPTION

[0027] Various exemplary embodiments, features, and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numbers in the drawings represent the same or similar elements. Although various aspects of the embodiments are illustrated in the drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

[0028] The batch testing device and testing method for temperature measuring resistors of key positions of power generators provided by the present application can be applied to the measurement of temperature measuring resistors of key positions of power generators of large hydropower stations. In fact, the batch testing device and testing method for temperature measuring resistors of key positions of power generators are also applicable to the measurement of three-wire platinum resistors PT100 in the application scenarios of thermal power stations, medical equipment, automobile monitoring, aerospace, etc.

[0029] Figure 1 A schematic diagram of the batch testing device for temperature measuring resistors of key positions of power generators according to an embodiment of the present application is shown; Figure 2 A schematic diagram of the batch testing device for temperature measuring resistors of key positions of power generators according to an embodiment of the present application is shown; Figure 3 A schematic diagram of the batch testing device for temperature measuring resistors of key positions of power generators according to an embodiment of the present application is shown; Figure 4 A schematic diagram of the batch testing device for temperature measuring resistors of key positions of power generators according to an embodiment of the present application is shown.

[0030] As shown in Figures 1-2 A batch testing device for temperature measuring resistors of key positions of power generators includes a power conversion module, a resistance measurement and display module, a lead access module, and a switching module. The power conversion module is used to convert an external AC power supply into a DC power supply. The resistance measurement and display module is powered by the DC power supply and is used to measure and display the resistance value of the access resistor. The lead access module is used to access the temperature measuring resistor lead. The switching module is connected between the lead access module and the resistance measurement and display module and is used to combine and switch the lead accessed by the lead access module to form different resistance measurement loops.

[0031] The above-mentioned modules of the batch testing device for temperature measuring resistors of key positions of power generators can be integrated in a portable engineering plastic case with an IP54 protection level.

[0032] In some embodiments, the power conversion module is mainly used to convert AC power into DC power. An industrial-grade switching power supply module 4 with an input of AC 220V and an output of DC 24V / 2A can be used. The output end of the module is connected in parallel with a 0.1 μF filter capacitor to ensure the stability of the output DC power.

[0033] In some embodiments, in order to better adapt to the simultaneous display of the three resistance measurement display modules, the present embodiment further comprises a power adapter terminal block 5 for connecting the output of the power conversion module with the power input of the resistance measurement display module. In order to test safety, the power adapter terminal block 5 is provided with an insulating partition plate for separating the positive and negative poles on the power adapter terminal block 5. Since the independent AC / DC power module 4 and the power adapter terminal block 5 are adopted, a stable DC power supply is provided for the measuring instrument, effectively avoiding the influence of the fluctuation of the on-site AC power supply on the measurement accuracy, and at the same time, the power supply wiring is standardized and well isolated, improving the safety of the operation.

[0034] In some embodiments, the resistance measurement display module can adopt a 4-bit half-display LCD liquid crystal digital display resistance tester 1, and the model is preferably one with three-wire measurement function. The measurement range is 0-200Ω, and the measurement accuracy is not less than 0.5%. Since the high-precision LCD liquid crystal digital display resistance tester 1 is adopted, the accuracy and intuitiveness of the measurement result are guaranteed, the reading is clear, and it can be quickly judged whether the resistance value of the temperature measuring resistance is within the qualified range, ensuring the quality of equipment maintenance. The power input of the instrument is connected to the power adapter terminal block 5 through a wire.

[0035] In some embodiments, the lead-in module is a spring terminal 2. The lead-in module adopts a spring terminal 2, which can be plugged in and out more quickly. Compared with the traditional screw terminal, the plugging operation is more rapid and labor-saving, realizes the quick connection and disconnection of the test lead, further reduces the operation strength, shortens the test period of a single resistance, and is particularly suitable for batch testing scenarios that require frequent line changes.

[0036] In some embodiments, the adapter module is a terminal block, and the terminal block is provided with a plurality of groups of configurable short-circuiting pieces. Different resistance measurement circuits are formed by configuring the short-circuiting pieces. Since the adapter module adopts a terminal block with short-circuiting pieces, such as an RTD terminal block with two short-circuiting pieces, it provides high test flexibility. That is, different circuits for measuring the main resistance, backup resistance or checking the continuity of the lead can be flexibly configured without disconnecting the lead. This effect supports the higher generalization of "forming different resistance measurement circuits" and avoids repeated disconnection of the lead.

[0037] For example, the terminal block adopts a high-density RTD adapter terminal block 3, such as JH-5.08-20P. The terminal block has two lead-in positions for each group, and each group is connected by a pluggable copper short-circuiting piece. The input end of the terminal block is connected to the corresponding circuit of the spring terminal 2 through a wire, and the output end is connected to the resistance measurement input end (S+ and S-) of the LCD liquid crystal digital display resistance tester 1 through a test lead.

[0038] The device provided by the application integrates a power conversion module, a resistance measurement and display module, a lead access module, a switching module and other functional modules in a portable engineering plastic or metal case with at least IP54 waterproof level. The device fundamentally changes the mode of single-point testing of a traditional multimeter. The integration and batch operation of the testing process are realized, the preparation time before testing and the connection complexity between different devices are significantly reduced, a basis is provided for batch testing with large workload, and the overall testing efficiency is greatly improved.

[0039] As shown in Figure 1 and 3 In some embodiments, the testing device further comprises an anomaly detection module 12 connected with the LCD liquid crystal digital display resistance tester 1. The anomaly detection module 12 is used for automatically judging whether the resistance value of the temperature measuring resistance is qualified and issuing a warning. The anomaly detection module 12 is used for eliminating the access resistance that does not meet the preset condition. Through the anomaly detection module 12, the testing can be more intelligent, and the unqualified products can be directly informed to the tester for elimination, timely replacement, and improvement of the efficiency of the maintenance work.

[0040] For example, the anomaly detection module 12 can be an integrated single-chip microcomputer (MCU), such as an STM32 series. The built-in ADC (analog-to-digital converter) directly collects the analog voltage signal of the measurement end of the LCD meter through a sampling circuit, then calculates and converts it into a resistance value, compares it with the threshold value stored in the FLASH, and finally drives an LED lamp and a buzzer through the GPIO port.

[0041] For example, the anomaly detection module 12 can be composed of a comparator chip (such as LM393) and a precision potentiometer. The output signal (representing the resistance value) of the LCD meter is connected to one end of the comparator, and a threshold voltage is set by the potentiometer at the other end. When the input signal exceeds the limit, the output level of the comparator flips, driving a triode to turn on the sound and light alarm circuit.

[0042] “Data connection” includes but is not limited to: directly collecting analog signals from the input end of the meter, reading digital outputs from the meter through a serial port (UART), or reading LCD screen values through image recognition. Any method that can achieve data acquisition is within the scope of protection.

[0043] In the embodiment, not only the problem of low testing efficiency is solved, but also the problem that manual testing is prone to fatigue or calculation errors, leading to incorrect judgment of unqualified products, is solved. Through the anomaly detection module 12, the unqualified access resistance is detected and prompted, greatly reducing the problem of incorrect judgment of unqualified products caused by human error.

[0044] As shown in Figure 4As shown, in some embodiments, the abnormality detection module 12 includes a storage module, a judgment module and an alarm module. The storage module is used to acquire and temporarily store the resistance value data displayed by the resistance measurement display module in real time. This module can be implemented based on a non-volatile memory (such as an EEPROM or a Flash), ensuring that the data is not lost after power failure.

[0045] The judgment module is connected with the storage module, and has pre-stored data of the qualified resistance value range of the PT100 temperature measurement resistance. For example, the standard resistance value is 100.00Ω at 0°C, and the qualified range can be pre-set as 99.80Ω-100.20Ω. This module is used to automatically compare the real-time resistance value data transmitted from the storage module with the pre-set qualified range, and generate a judgment result (“qualified” or “unqualified”).

[0046] The alarm module is connected with the judgment module, and is used to receive the judgment result. When the judgment result is “unqualified”, the module immediately activates the acoustic and / or optical alarm to prompt the tester.

[0047] Through the alarm module, the tester can be promptly prompted with the unqualified data, preventing human calculation errors from finding out the abnormal resistance by relying on the tester to visually measure the data and then calculate the judgment by himself.

[0048] Another aspect of the embodiments of the present application is to provide a method for batch testing of temperature measurement resistances using any one of the devices. Taking a three-wire PT100 resistance as an example, the device is used for testing, including the following steps: Device power-on: Since the device has been made into a conventional plug mode, it is suitable for maintenance power boxes and power supply panels; the power plug of the device is connected to the AC 220V socket of the maintenance power box, at this time the AC / DC power module 4 works, outputs DC 24V, and the LCD liquid crystal digital display resistance tester 1 is powered on standby.

[0049] Lead connection: the three leads (A, B, C) of the PT100 resistance to be tested are respectively inserted into any three adjacent terminals of the spring terminal 2, and the spring button is pressed to lock the cable.

[0050] Loop configuration and measurement steps: measurement of main resistance (A-B): on the RTD adapter terminal row 3, find the two terminal positions corresponding to the lead A6 and the lead B7, which have been short-circuited by the short-circuiting piece. At this time, the loop has been connected, and the resistance value displayed on the first LCD liquid crystal digital display resistance tester 9 is the resistance value of the PT100 main loop (including the lead resistance). Record the value Rab.

[0051] Measurement of spare resistance (A-C): On the RTD adapter terminal row 3, find the two terminal positions corresponding to the access lead A6 and lead C8, which have been short-circuited by a short-circuiting piece. At this time, the circuit has been connected, and the resistance value displayed on the second LCD liquid crystal digital resistance tester 10 is the resistance value of the PT100 spare circuit (including the lead resistance). Record the value Rac.

[0052] Check the lead (B-C): On the RTD adapter terminal row 3, find the terminal positions corresponding to the lead B7 and lead C8, which have been short-circuited by a short-circuiting piece. At this time, theoretically, a very small lead resistance (tending to 0Ω) should be measured. If the third LCD liquid crystal digital resistance tester 11 displays an over-range (OL), it indicates that the lead is disconnected; if a large resistance value is displayed, it may indicate that the leads are connected incorrectly or short-circuited. This step is used to verify the integrity of the leads themselves.

[0053] Circulation test step: After completing the test of the current temperature measuring resistance, remove the lead of the temperature measuring resistance to be tested from the lead access module, access the lead of the next temperature measuring resistance to be tested, and repeat the above steps.

[0054] Due to the use of the above-mentioned testing method, the complex resistance testing process is streamlined and standardized. The operator only needs to perform the cycle of "power on - access - reading - switching" according to the steps, and all tests can be completed, reducing the dependence on the technical level of the operator and the possibility of human error, and ensuring the efficiency and reliability of the testing process.

[0055] In the above method, configuring the measurement circuit through the adapter module includes: configuring different resistance measurement circuits by setting configurable short-circuiting pieces on the terminal row of the adapter module. Since this method uses the adapter module to perform multiple tests without a fixed wiring sequence, it further liberates the operation process, avoids errors caused by remembering or executing complex wiring sequences, and truly realizes fast and error-free batch testing.

[0056] In some embodiments, an abnormality detection step is further included for excluding access resistances that do not meet the preset conditions. The addition of qualified and unqualified data records for detection data forms a closed-loop management of the testing work, ensuring the traceability of each measurement point data and providing data support for equipment condition-based maintenance.

[0057] Specifically, the abnormality detection step is implemented by the abnormality detection module 12. After the data displayed on each LCD liquid crystal digital display resistance tester 1 is acquired by the storage module of the abnormality detection module 12, the data is compared with the preset qualified range by the judgment module. If the resistance value is within the qualified range, the alarm module remains silent; if the resistance value is out of tolerance (too high, too low or open circuit), the alarm module immediately starts (such as the red light turns on, the buzzer sounds), directly reporting the abnormal resistance to the tester.

[0058] The operator records the data in the test table according to the alarm prompt and the instrument display, and the test points that are alarmed need to be marked.

[0059] The beneficial effects of the embodiment are: 1. Strong intelligence and error-proofing capability: By integrating the abnormality detection module 12, automatic interpretation and immediate alarm of the measurement results are achieved. This completely avoids the possible omissions, misjudgments and calculation errors caused by manual visual reading, mental calculation or table comparison, greatly improving the accuracy and reliability of the test results and ensuring the quality of the unit maintenance.

[0060] 2. Further improvement of test efficiency: The tester does not need to focus on viewing the specific values of the instrument and performing calculations after each measurement. Only by listening or looking at the light, the tester can quickly make a "pass / fail" judgment, and the attention can be more focused on the wiring operation, further accelerating the overall rhythm of batch testing.

[0061] The above has described the embodiments of the present application, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles, practical application or improvement of technology in the market of the embodiments, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed herein.

Claims

1. A batch testing device for temperature measuring resistors used in key locations of a steam turbine, characterized in that, It comprises: a power conversion module for converting external AC power into DC power; a resistance measurement and display module powered by the DC power for measuring and displaying the resistance value of the connected resistance; a lead connection module for connecting the temperature measurement resistance lead; a switching module connected between the lead connection module and the resistance measurement and display module for switching the lead connected by the lead connection module to form different resistance measurement circuits.

2. A batch testing device for temperature measuring resistors used in critical positions of a generator according to claim 1, characterized in that, It further comprises an anomaly detection module (12) for removing the connected resistance that does not meet the preset conditions.

3. A mass testing device for temperature measuring resistance for key positions of a steam turbine according to claim 2, characterized in that, The anomaly detection module (12) comprises a storage module, a judgment module and an alarm module, the storage module is used to obtain the resistance value data of the connected resistance displayed by the resistance measurement and display module and transmit the resistance value data to the judgment module, the judgment module is used to compare the resistance value data with the preset qualified resistance value data and transmit the judgment result to the alarm module.

4. A batch testing device for temperature measuring resistors used in key positions of a generator according to any one of claims 1 to 3, characterized in that, The switching module is a terminal strip, a plurality of groups of configurable short-circuit pieces are arranged on the terminal strip, and different resistance measurement circuits are formed by configuring the short-circuit pieces.

5. A mass testing device for temperature measuring resistance for key positions of a steam turbine according to claim 4, characterized in that, The terminal strip is an RTD switching terminal strip (3), and the terminals of the RTD switching terminal strip (3) are short-circuited in pairs by short-circuit pieces.

6. A batch testing device for temperature measuring resistors used in key positions of a generator as claimed in any one of claims 1 to 3, characterized in that, The lead connection module is a spring terminal (2).

7. The apparatus of claim 1, wherein, It further comprises a power switching terminal strip (5) for connecting the output end of the power conversion module and the power input end of the resistance measurement and display module.

8. A method for testing a plurality of temperature measuring resistors using the batch testing device for temperature measuring resistors for critical parts of a power generator according to any one of claims 1 to 7, characterized in that, It comprises the following steps: Power on the device: connect the external AC power to the device; Lead connection: connect the lead of the temperature measurement resistance to be measured to the lead connection module; Circuit configuration and measurement: configure the measurement circuit through the switching module and read the resistance value of the current measurement circuit on the resistance measurement and display module; Cyclic test: after completing the test of the current temperature measurement resistance, remove the lead of the temperature measurement resistance to be measured from the lead connection module, connect the lead of the next temperature measurement resistance to be measured to the lead connection module, and repeat the above steps.

9. A method for testing a plurality of temperature measuring resistors for key positions of a steam turbine according to claim 8, characterized in that, The switching module is a terminal strip, a plurality of groups of configurable short-circuit pieces are arranged on the terminal strip, and different resistance measurement circuits are formed by configuring the short-circuit pieces.

10. A method for testing a plurality of temperature measuring resistors for key positions of a steam turbine in accordance with claim 8, wherein, It further comprises an anomaly detection step for removing the connected resistance that does not meet the preset conditions.

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