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Capacity method and electric quantity method for trace moisture analyzer
2024-12-04The trace moisture analyzer under UHV power can help many power workers conduct various power tests more conveniently.The Karl Fischer volumetric method of the Karl Fischer moisture analyzer, also known as titration method, requires the following 5 steps for each sample measurement:1. First, inject a portion of the reagent into the titration cell.2. Titrate a portion of Karl Fischer reagent to achieve equilibrium.3. Inject the tested sample.4. Titrate Karl Fischer reagent into the titration cell again.5. Discharge fee liquid.The reagent should be replaced every time it is tested. This method converts the water content based on the amount of Karl Fischer reagent injected and the titration degree of the reagent, as Karl Fischer reagent is affected by factors such as environmental humidity, light, and sealing. Titration degree is constantly changing, leading to titration errors. During the measurement experiment, every time a measurement is made, the waste liquid from the previous measure
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Market Development of Cable Fault Testers
2024-12-03The cable fault tester under UHV power can help many power workers conduct various power tests more conveniently.With the development of the times, the use of electricity has also evolved. Nowadays, electricity is everywhere around us, and it is transmitted to various places through cables, providing great convenience for our lives and work. With the increasing production of cables, the types of instruments used to detect cable faults, such as cable fault testers, have become more diverse. Today, let's talk about the configuration and management of cable fault testers.With the increasing production scale, types, and sales volume of cable manufacturers year by year. Due to the classification of cable faults into high resistance, low resistance, wire breakage, and composite faults, the cable fault testers currently available on the market are generally equipped with high and low voltage sets, including a large number of components and accessories. A set of equipment components can ra
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Precautions for Oil Moisture Tester
2024-12-03The oil moisture tester under UHV power can help many power workers conduct various power tests more conveniently.The precautions for oil moisture testers are as follows:(1) System wide closure issue. The connection of the Karl Fischer reagent liquid circuit from the reagent bottle to the metering pump and then to the reaction tank must be tightened, otherwise reagent leakage will directly affect the detection results. Another unresolved issue is the delay in titration completion due to the absorption of Karl Fischer reagent during testing.(2) Accuracy of sampling. The calibration of Karl Fischer reagent requires 10 mg of water and the use of 10 μ l samplers as much as possible, which is not only accurate and fast, but also can prevent water droplet adhesion. Similarly, there are similar issues with the use of methanol reagents and ethyl esters. After disassembly, attention should be paid to shortening the opening time of the reaction tank as much as possible.(3) Adjust the magnetic st
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What preparations are needed in advance for series resonance?
2024-12-02The series resonance under UHV power can help many power workers conduct various power tests more conveniently.Due to the high overall value of series resonance (also known as AC withstand voltage testing equipment), more and more factories choose it when testing equipment. Of course, they also ask what needs to be done before using series resonance. The following two aspects are worth choosing.Before using series resonance, it is necessary to test its structure and circuit. As it has been placed for a period of time before using series resonance, there may be aging of the circuit or other minor faults. A timely and comprehensive test can determine whether the series resonance is normal and whether it can maintain a stable personality during use. Think about it, if a series resonant circuit that has been idle for a long time ages and no problems are detected during assembly, it will definitely affect the functionality of the entire electronic equipment and cause a lot of trouble during
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Oil Open Cup Flash Point Analyzer
2024-11-29The oil open cup flash point tester under UHV power can help many power workers conduct various power tests more conveniently.Flash Point Tester A flash point tester is an instrument used to determine the flash point of a sample, which is the temperature point at which the sample vaporizes into another combustible component state in air. At that moment, the flash point meter can determine and measure the vapor pressure changes that occur, also known as the minimum flammability limit. Therefore, the steam concentration can be determined by temperature. There are two main types of flash point analyzers: open cup flash point testers and closed cup flash point testers. Open design aims to simulate open and natural environments, while closed design is more commonly used for laboratory testing.Application of flash point testingThe determination of flash point can be used for various applications, such as determining the flash point of diesel and other fuel types in petrochemical analysis, sp
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A comprehensive and detailed explanation of AC series resonant test system
2024-11-29The AC Series Resonant Test System under UHV power can help many power workers conduct various power tests more conveniently.Resonance refers to the simple harmonic vibration in physics, where the acceleration of an object is proportional to the displacement from the equilibrium position and is always directed towards the equilibrium position by the restoring force. The dynamic equation is F=- kx. The phenomenon of resonance is that the current increases and the voltage decreases. The closer it is to the resonance center, the faster the ammeter, voltmeter, and power meter rotate, but the difference from short circuit is that there will be no zero sequence quantity.In physics, there is a concept called resonance: when the frequency of the driving force is equal to the natural frequency of the system, the amplitude of the forced vibration of the system is maximized, and this phenomenon is called resonance. The resonance in a circuit actually means that when the excitation frequency in th
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Judgment of DC resistance tester results
2024-11-28The DC resistance tester under UHV power can help many power workers conduct various power tests more conveniently.1. When measuring the DC resistance of a transformer, due to the large inductance, it is necessary to charge it properly and minimize the self inductance effect. After the pointer of the DC resistance tester stabilizes, read the resistance value to improve accuracy and precision.2. The results of the DC resistance tester should be compared horizontally and vertically, and the influencing factors such as temperature, phase difference, wiring method, tap changer, poor contact, and disconnection should be fully analyzed.a. Temperature influenceDC resistance is directly proportional to temperature. The DC resistance varies at different oil temperatures. The DC resistance measured at different temperatures should be converted to the same temperature for comparison purposes. The formula for converting DC resistance temperature is:R2=R1(T+t2)/(T+t1)(Where R1 and R2 are the resist
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Frequently Asked Questions about Frequency Conversion AC Series Resonant Test
2024-11-27The Frequency Conversion AC Series Resonant under UHV power can help many power workers conduct various power tests more conveniently.Q: What are the AC withstand voltage testing methods using the series parallel resonance principle?Answer: For AC withstand voltage testing of large capacity test objects such as long cable lines, capacitors, large generators, transformers, etc., large capacity testing equipment and power sources are required, which are often difficult to achieve on site. In this case, series parallel resonance or series parallel resonance (also known as series parallel compensation) can be used according to the specific situation to solve the problem of insufficient capacity of the testing equipment.(1) Series resonance (voltage resonance) method. When the rated voltage of the test transformer cannot meet the required test voltage, but the current can meet the test current of the tested object, the problem of insufficient test voltage can be solved by series resonance.(
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Detailed explanation of testing steps for cable fault location detector
2024-11-27The cable fault location detector under UHV power can help many power workers conduct various power tests more conveniently.The basic steps of fault testing are to measure the insulation resistance of the faulty cable with a megohmmeter or multimeter, determine the nature of the fault, and determine the testing method; Test the fault distance; Detecting the path of cable burial near the fault point; Fixed point. This testing system has three basic methods for fault testing: low voltage pulse, direct flash, and impulse flash. Combined with different sampling methods, there are a total of eight testing methods. Disconnect all connections at the cable terminals before testing. There are two knobs on the panel of the testing system, "Input Amplitude" and "Displacement", which are used to adjust the signal amplitude and up and down position for the next sampling, respectively.1. Low voltage pulse method is used to test the speed of radio wave propagation in cables, the total length of cable
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Introduction to series resonant reactor
2024-11-26The AC Resonant Test Set under UHV power can help many power workers conduct various power tests more conveniently.At the resonant frequency, the reactor and load convert the excitation square wave voltage into an ideal sine wave. The parameter selection of high-voltage reactors must fully consider the power and frequency range of the test sample. The existing reactive power compensation equipment in the power system includes two types: static reactive power compensation devices and dynamic reactive power compensation devices. The former includes parallel capacitors and parallel reactors, while the latter includes synchronous compensators (phase-shifters) and static reactive power dynamic compensation devices (SVS).The combination of single-stage reactors can meet the optimal configuration of the circuit, ensuring the output voltage and frequency range. The voltage level of each stage reactor can be determined separately. The advantages of this type of reactor are easy combination and
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Operation steps of open flash point tester
2024-11-25The open flash point tester under UHV power can help many power workers conduct various power tests more conveniently.The open flash point tester adopts microcomputer technology and a large screen LCD display. The instrument heats up, automatically raises and lowers, automatically ventilates, automatically ignites, automatically displays, automatically locks the flash point value, and automatically prints the results according to standard methods. After testing, it can automatically cool down, achieving full automation of the working process. The automatic open flash point tester has the advantages of accurate measurement, good repeatability, stable performance, and simple operation. It has a wide range of applications in petroleum, chemical, light industry, and power industries.The flash point value and ignition point value are used to indicate the presence of highly volatile or flammable substances in relatively non-volatile or flammable substances, and are important parameters for t
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Classification of test transformers
2024-11-25The professional production of high-voltage test transformers in UHV power can help many power workers conduct various power tests more conveniently.A test transformer is a transformer used for conducting power frequency withstand voltage tests on various electrical products and insulation materials, also known as a high-voltage test transformer. The main features of this system are as follows:A. High voltage. The rated voltage of a single machine is 50, 100, 150, 250, 500, and 750 kV.B. High voltage waveform requirements. Usually, power is supplied by a generator set, filters are used, and the magnetic density of the transformer itself should not be high.C. Short working hours. Due to the short withstand time of the tested product (1 minute or 5 minutes), the working time is generally within half an hour.D. The current is small. The rated current of the experimental transformer is actually the capacitance current of the measured object, so it is usually less than 1a.There are four typ
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Advantages and disadvantages of Karl Fischer titration method
2024-11-22The trace moisture analyzer under UHV power can help many power workers conduct various power tests more conveniently.Karl Fischer titration is a titration method that determines the amount of water (moisture) present in a given sample by using two different techniques, such as volumetric titration or coulometric titration. Many quality control applications require the determination of water content, including chemicals, pharmaceuticals, and food. Karl Fischer titration (KF) is a widely used quality control method that can meet the needs of various industries and research work. The oxidation reaction between iodine and sulfur dioxide is the fundamental principle of Karl Fischer.Karl Fischer reagent contains iodine, sulfur dioxide, alkali, and solvents such as alcohol and anhydrous methanol, which are also used in the KF process.Advantages of Karl Fischer titration:The main advantage of Karl Fischer titration is that it can be used for volatile substances as well as non-volatile substan
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The function of adjustable high-voltage digital megohmmeter
2024-11-22The megohmmeter under UHV power can help many power workers conduct various power tests more conveniently.Adjustable high-voltage digital megohmmeter is a small instrument commonly used in power testing and testing. Although sparrows are just small instruments, they are small and complete. The function of the megohmmeter is also very powerful. Here is an introduction by professional technical engineers from Huayi, as well as the operation part of the adjustable high-voltage digital megohmmeter function.1. L "high voltage output terminal:This is the end of an LSO southern compilation. A megohmmeter uses high-voltage cables to connect the tested circuit, such as the windings of transformers or motors, as well as the core wires of the cables.2. G "protection terminal:When measuring the volume resistance of insulation materials and cables using the three electrode method with a megohmmeter, connect the "G" to the protective ring electrode of the three electrodes. The protective ring is use
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The grounding resistance tester is the key to ensuring circuit safety
2024-11-21The grounding resistance tester under UHV power can help many power workers conduct various power tests more conveniently.DC resistance testing is a very important testing item after transformer handover, overhaul, and replacement of tap changers. It refers to the resistance of buried grounding bodies and the resistance of soil stray currents. Generally speaking, using traditional methods (bridge method and voltage drop method) to measure the DC resistance of transformer windings and high-power inductive devices is both time-consuming and laborious. Usually using a testing instrument for measurement can effectively improve product quality and prevent power accidents from occurring. It consists of a high-power switching power supply circuit, a precision small signal measurement circuit, a protection circuit, and a high-speed microcontroller control circuit. It has functions such as instrument self checking, signal measurement, data processing, rapid discharge, and printing results.The a
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What is an insulation resistance tester
2024-11-21The insulation resistance tester under UHV power can help many power workers conduct various power tests more conveniently.The insulation resistance tester can be used to measure the resistance values of various insulation materials and the insulation resistance of transformers, motors, cables, electrical equipment, etc. Below we will discuss some common issues.What does the output short-circuit current of the insulation resistance tester mean?Long cables, motors with many windings, transformers, etc. belong to capacitive loads. When measuring the resistance of such objects, the output short-circuit current of the insulation resistance tester can reflect the internal resistance of the high-voltage source output inside the megohmmeter.Why use the external "G" terminal to measure higher resistanceThe external "G" terminal (shielded terminal) is used to eliminate the influence of humidity and dirt in the testing environment on the measurement results. When measuring high resistance, if th
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Karl Fischer coulometric titration
2024-11-20The trace moisture analyzer under UHV power can help many power workers conduct various power tests more conveniently.The Karl Fischer titration reaction uses volumetric or Coulombic titration to determine the amount of water present in the sample based on the oxidation of sulfur dioxide by iodine, where water is consumed in the buffer solution.This technology was discovered by Karl Fischer. Karl Fischer titration is a method for determining the moisture content of different types of substances. This depends on the reagent that reacts with the water content and turns it into a non-conductive chemical. Volume KF titration and Coulomb KF titration are two techniques that can be used for Karl Fischer titration of water:Volumetric Karl Fischer titration: Using this technique, the moisture content depends on the volume or quantity of reagents used to convert water. Volume determination is suitable for measuring the moisture content of water as low as 1%. In these types of KF techniques, the
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What is the testing method for insulation resistance tester?
2024-11-19The insulation resistance tester under UHV power can help many power workers conduct various power tests more conveniently.The insulation resistance tester has three types of tests for measuring insulation resistance. Each test uses its own method, focusing on the specific insulation characteristics of the tested equipment. Users need to choose the most suitable one for testing requirements.Point test: This test is suitable for devices with minimal or negligible capacitance impact, such as short circuits.The test voltage is applied over a short distance of time until a stable reading is reached, and the test voltage can be applied for a fixed period of time (usually 60 seconds or less). Collect readings at the end of the test. Regarding historical materials, we will draw maps based on the reading of historical materials. The observation of trends is conducted over a period of time, usually several years or months.This test is usually used for testing or historical records. Changes in t
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Principle of Communication Voltage Resistance
2024-11-19The series resonance under UHV power can help many power workers conduct various power tests more conveniently.The AC withstand voltage test is an indispensable and easiest to detect problem in electrical equipment testing. The power frequency high voltage required for the AC withstand voltage test is generally generated through a high-voltage test transformer or its series device. During the boosting process, if the current increases sharply with the regulation of the voltage regulator, but the voltage remains basically unchanged or shows a downward trend, it is due to excessive experimental load and insufficient capacity of the testing equipment. Due to volume and weight limitations, the capacity of the testing equipment cannot be made very large. In order to achieve the purpose of voltage resistance, it is necessary to use reactance compensation for the experiment.For the tested equipment with a test voltage not exceeding the rated voltage of the experimental transformer and a small
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Common problems with insulation resistance tester
2024-11-18The insulation resistance tester under UHV power can help many power workers conduct various power tests more conveniently.The insulation resistance tester is suitable for measuring the resistance values of various insulation materials and the insulation resistance of transformers, motors, cables, and electrical equipment to ensure that these devices, appliances, and circuits are working in a normal state and to avoid accidents such as electric shock. Personnel casualties and equipment damage.The common problems with insulation resistance testers are as follows:1. What is the relationship between the output short-circuit current of the insulation resistance tester and the measured data when measuring the resistance of capacitive loads, and why?The output short-circuit current of the insulation resistance tester can reflect the internal resistance of the high-voltage power supply.Many insulation test objects are capacitive loads, such as long cables, motors with many windings, transform
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