Product List
Hubungi kami
Email：qiao@hvtest.cc
Seluler：+8615871365102
Aplikasi apa：+8615871365102
-
Say goodbye to the "grounding" problem: Do you really understand how to solve the AC grounding resistance test with one trick?
2026-01-12The importance of "grounding" in the safe operation of power systems and electrical equipment is self-evident. It is like a silent guardian, sharing fault currents at critical moments, protecting equipment and personal safety. Do you know how to accurately measure the quality of grounding? Today, let's talk about the grounding resistance tester and how to use it to ensure a safer electrical world.Why is grounding resistance so critical?Simply put, grounding resistance is the resistance encountered by current flowing from a grounding body to the earth. The smaller this value, the better the grounding, and the easier it is for the fault current to be conducted away. If the grounding resistance is too high, once a fault occurs, the current cannot be effectively dissipated, which may affect the normal operation of the equipment or even cause electric shock accidents. Therefore, regular testing and evaluation of grounding resistance is of utmost importance in ensuring safe production of
LAGI -
Essential for power operation and maintenance: SF6 gas leak detector linked with micro water measurement and insulation equipment withstand voltage measurement
2026-01-12In the dense channel of high-voltage equipment in the substation, the operation and maintenance personnel hold the detector and slowly move along the weld seam of the high-voltage switch. Suddenly, the instrument emitted a sharp alarm sound - SF6 gas leakage was accurately captured. At the same time, another group of personnel is reading the moisture content in the chamber through a micro water tester, while on the insulation test vehicle, the voltage curve of the withstand voltage test is steadily rising on the screen.This is a standard scenario for the safe operation and maintenance of modern power systems. With the increasing complexity of power grid equipment, a single detection method can no longer meet safety requirements. The coordinated monitoring of SF6 gas state and insulation strength has become a key technical defense line to ensure the reliable operation of power equipment.1、 Why is comprehensive testing necessary for the "health triple door" of power equipment?SF6 gas has
LAGI -
Exploring the "Circuit Breaker Characteristics Tester": How powerful is the "health check-up officer" of the power system?
2026-01-09In our daily lives, the power system is like an invisible artery, supporting everything in operation. In this vast and intricate system, there is a type of 'guardian' that is crucial, and they are circuit breakers. They are usually unknown, but in critical moments, they need to be able to quickly and accurately 'cut off' anomalies to protect the safety of the entire power grid. How can we know if these 'guardians' are always in their best condition? Now it's our turn for today's protagonist - the circuit breaker characteristic tester!What is a circuit breaker characteristic tester? What role does it play?Simply put, a circuit breaker characteristic tester is a precision instrument specifically designed to test various performance indicators of circuit breakers. You can imagine it as a doctor giving a "health check" to a circuit breaker. A circuit breaker is not a simple switch, its internal structure is complex, and it needs to go through a series of act
LAGI -
Abnormal frequency dielectric loss tester, an essential tool for "health checkups" of power equipment
2026-01-09Electricity is an indispensable lifeline in modern society. And what supports this lifeline are countless precision electrical equipment. To ensure the stable operation of these devices, we not only need daily maintenance, but also a scientific and accurate "health check-up" plan. Today, let's talk about an important instrument that plays the role of a "health check-up specialist" in the field of power equipment testing - the inter frequency dielectric loss tester.What is a heterodyne dielectric loss tester?Simply put, a high-frequency dielectric loss tester is a precision instrument used to measure the insulation dielectric loss (also known as the dielectric loss tangent, Tan δ) of electrical equipment. Insulation medium, like the "protective layer" inside power equipment, its quality directly affects whether the equipment can work safely and stably. When this "protective layer" experiences aging, moisture, fouling, and other issues, it can lead to increased energy loss, temperatu
LAGI -
Exploring the Secrets of Variable Frequency Dielectric Loss Tester: The "Medical Examiner" for Power Equipment
2026-01-07Have you ever been curious why electrical equipment such as transformers, cables, etc. need to undergo a "physical examination" after running for a period of time? In this "physical examination" process, an indicator called "dielectric loss" plays a crucial role. Today, let's talk about the secret weapon that can accurately diagnose the "health status" of power equipment - the variable frequency dielectric loss tester.What is frequency conversion dielectric loss? ——Health Code for Power InsulationWe need to figure out what 'dielectric loss' really is. Simply put, insulation materials in power equipment (such as transformer insulation oil, cable insulation layer) are like a "fence" that prevents current from running around. When a voltage is applied to insulating materials, a portion of the electrical energy is converted into heat energy and dissipated due to defects in the material itself, such as moisture, impurities, aging, etc. This energy loss is called "dielectric loss
LAGI -
Unveiling the Electrical Insulation 'Physical Examination Officer': How Does the Dielectric Constant Dielectric Loss Tester Work?
2026-01-07Have you ever thought about how reliable the insulation materials inside the power equipment that supports our modern life, such as transformers, cables, insulators, etc., are? How much voltage can they withstand without 'striking'? Behind this, there is a silently dedicated 'health inspector' - a dielectric constant dielectric loss tester. Today, let's unveil its mysterious veil together and see how it safeguards the safety of the power grid.What are dielectric constant and dielectric loss?Before delving deeper into the instrument, let's first understand these two terms that sound a bit "high-end":Dielectric constant: Simply put, it measures the ability of an insulating material to store electrical energy under the action of an electric field. Just like charging a capacitor, the higher the dielectric constant, the more electricity the material can 'hold'. It directly affects the capacitance and performance of electrical equipment.Dielectric loss: This i
LAGI -
Are you still worried about polarity testing? These few moves will make it easy for you to handle!
2026-01-07In the maintenance and operation of power equipment, the variable ratio polarity tester is an indispensable helper. It is like a "health checkup" for power equipment, which can help us quickly and accurately determine whether the transformation ratio and wiring method of transformers and other equipment are correct, thereby ensuring the safe and stable operation of the power system. However, many friends still encounter various problems in practical operation. Today, let's unveil the mysterious veil of the variable ratio polarity tester together and learn how to better utilize it to achieve twice the result with half the effort!Variable Polarity Tester: What exactly is it?Simply put, a variable ratio polarity tester is an instrument specifically designed to measure electrical parameters of power equipment such as transformers. It can mainly do two things:Ratio measurement: Just like calculating the "height to weight ratio" of a transformer, it can measure the proportional relations
LAGI -
Why does your material 'leak' so quickly? What about dielectric constant and dielectric loss!
2026-01-07In electrical engineering, materials science, and many high-tech fields, "leakage" is not a good sign. It may not only cause energy loss, but also affect the performance of equipment, and even pose safety hazards. To investigate the "leakage" situation of materials, there are two crucial indicators - dielectric constant and dielectric loss. Today, let's talk about these two seemingly sophisticated concepts that are actually closely related to us, and how to accurately measure them through professional instruments.What is dielectric constant? It is related to the "energy storage" capability of the materialSimply put, the dielectric constant (usually expressed as ε r) is a physical quantity that measures the degree to which the internal electric field strength of an insulating material decreases compared to vacuum under the action of an electric field. You can imagine it as the material's' electric field storage capability '. The higher the dielectric constant of a materi
LAGI -
How to reshape the industry standard for optical digital+three-phase/six phase microcomputer relay protection tester?
2026-01-06In today's rapidly developing smart substations, relay protection devices serve as the "safety guards" of the power grid, and their accuracy and reliability are directly related to the stable operation of the power system. Traditional testing tools have long faced pain points such as bulky size, narrow dynamic range, and poor protocol compatibility.The integration application of optical digital relay protection tester and three-phase/six phase microcomputer relay protection tester is breaking this deadlock and reshaping the technical standards and workflow of the industry.01 Noun analysis: Technological leap of the three core testing instrumentsOptical digital relay protection testerThis type of equipment is a revolutionary tool designed specifically for smart substations. It uses high-performance PowerPC processors and large-scale FPGA chips, and is directly connected to the protection device through fiber optic Ethernet.Supports IEC61850-9-1/9-2, FT3 protocol, and GOOSE communica
LAGI -
DC high-voltage pulse generator: an indispensable "energy heart" in experiments
2026-01-06Have you ever been troubled by the inability to obtain a stable high-voltage direct current source during testing of zinc oxide lightning arresters? Or is data distortion caused by voltage fluctuations during cable withstand voltage testing? The terminator of these troubles is today's protagonist - the DC high-voltage pulse generator. As the core equipment of modern power testing, it is like the "energy heart" of a laboratory, providing precise and controllable energy pulses for various high-voltage experiments.1、 Core definition: What is a DC high-voltage pulse generator?A DC high-voltage pulse generator is a high-voltage testing equipment based on pulse width modulation (PWM) technology. It converts ordinary AC power into high-voltage DC power through a high-frequency voltage doubling circuit, and achieves full range smooth voltage regulation and stable output.Compared to traditional power sources, it has three unique advantages:High stability: The output voltage stability can re
LAGI -
Why do you need to conduct a series resonance voltage withstand test on your electrical equipment?
2026-01-05In the power system, the insulation performance of equipment is directly related to the stable operation of the entire system. As an important insulation performance testing method for electrical equipment, series resonance withstand voltage test can effectively evaluate the reliability of equipment under high voltage environment. What is series resonance withstand voltage test and what can it bring us?What is series resonance withstand voltage test?Simply put, the series resonance withstand voltage test device is a device that uses the principle of series resonance to conduct withstand voltage tests on the insulation of large electrical equipment such as generators, transformers, cables, etc. It adjusts the parameters of inductance and capacitance to make the entire circuit reach a resonant state, thereby generating a huge resonant voltage at a small input power to simulate the high voltage stress that equipment may encounter in actual operation. This testing method is highly favored
LAGI -
Series resonance voltage withstand device: an efficient and reliable insulation detection solution for power equipment
2026-01-05Ensuring the reliability of insulation performance is crucial in the operation and maintenance of power equipment. Series resonant voltage withstand device, as the name suggests, is a device that uses the principle of series resonance to perform voltage withstand testing on high-voltage electrical equipment. It adjusts the parameters of inductance and capacitance to make the overall device in a resonant state, thereby generating high voltage at lower input voltages, and detecting insulation performance such as partial discharge and dielectric loss of the tested equipment. This technology has a wide range of applications in insulation and voltage withstand tests of key equipment such as transformers, cables, and generators.What is a series resonant voltage withstand device?Simply put, the series resonant voltage withstand device is like an amplifier, which can cleverly amplify lower power supply voltages to a level sufficient to meet the insulation testing requirements of high-voltage e
LAGI -
Exploring the resonance device: The secret weapon that makes power transmission more efficient!
2026-01-04Are you curious about the "resonance device" in power transmission? What exactly is it? And why can it play such an important role in ensuring the stable operation of the power system? Today, let's uncover this mysterious veil together and gain a deeper understanding of this seemingly complex yet crucial technology.What is a resonance device?In simple terms, a resonance device is a device that utilizes the resonance phenomenon in an electrical circuit or physical system to achieve specific purposes. In power systems, it is primarily used to suppress transient overvoltages or compensate for reactive power, thereby enhancing the operational quality and stability of the power grid. Imagine tuning a musical instrument; when it reaches a specific frequency, energy is transmitted in the most efficient way. Resonance devices leverage this principle, cleverly "tuning" the circuit during power transmission, allowing it to "calm down" at unwanted frequencies or "perform its best" at desired
LAGI -
Lightning Impulse High Voltage Generator: Unveiling Its Operating Principle and Application
2026-01-04Have you ever been amazed by the immense energy instantly released by lightning? In the electric power system, to simulate and study the transient high voltage generated by lightning, we rely heavily on a crucial device - the lightning impulse high voltage generator. It serves not only as the "guardian" of safety performance testing for electric power equipment, but also as the "unsung hero" ensuring the stable operation of the power grid.What is a lightning impulse high-voltage generator?In simple terms, a lightning impulse high-voltage generator is a large-scale testing equipment capable of generating simulated lightning transient overvoltages. Its core task is to simulate the instantaneous high-voltage impulses that lightning may cause to power equipment (such as transformers, circuit breakers, insulators, etc.), thereby evaluating the withstand capability and insulation level of these devices in real lightning strike environments. This is like giving electrical products a "lightnin
LAGI -
How Does the Variable Frequency Series Resonance Device Become the "Quiet Master" of the Power System?
2025-12-31The reliability of equipment insulation performance is crucial in the operation of power systems. But you know what? Some "electric tigers" emit annoying "roars" during operation - that is, partial discharge. It not only accelerates the insulation aging of equipment, but in severe cases may even lead to equipment damage, causing huge economic losses. Today, let's talk about how to use a black technology called "variable frequency series resonant device" to tame these "electric tigers" and make them obedient.What is a variable frequency series resonant device? Why is it so important?Simply put, a variable frequency series resonant device is a specialized equipment used for insulation withstand voltage testing of power equipment. Its core principle is to use a series resonant circuit to generate high test voltages at lower voltages and currents, thereby effectively and safely testing the insulation of large high-voltage electrical equipment such as generators, transformers, and cable
LAGI -
How to ensure the safety of power equipment with a complete set of variable frequency series resonance devices?
2025-12-31Have you ever thought about how to ensure that the "heart" of large and critical power equipment, such as generators, transformers, cables, etc., is strong enough and the lines are reliable before they are put into use? Today, let's talk about a crucial "behind the scenes hero" in the power industry - the complete set of variable frequency series resonance equipment. It is like a "health checkup specialist" for electrical equipment, providing us with professional testing to ensure our electrical safety.What is a complete set of variable frequency series resonance equipment?Simply put, the frequency conversion series resonance complete set device is a specialized equipment used for AC withstand voltage testing of high-voltage electrical equipment. It changes the frequency of the output power supply to generate a large resonant current in the inductance and capacitance components of the series resonant circuit, thereby obtaining a high test voltage on the test sample. Think about it,
LAGI -
Unveil the Mysterious Veil of the Series Resonance Test Device
2025-12-30In the world of high-voltage electrical equipment, a "physical examination" before each operation is crucial. Among various detection methods, the series resonance test device plays an indispensable role. Have you ever been curious about this device that sounds a bit "hardcore"? What exactly is it? Why is it so important in high-voltage testing? Today, let's unveil its mysterious veil together and see how it helps us ensure the stable operation of the power system.What is a series resonance test device?Simply put, a series resonance test device is an AC test power supply that can generate high voltage and high current. Its core lies in utilizing inductance L and capacitance C to form a "resonance" phenomenon at a specific frequency, thereby easily obtaining the required test voltage without the need for bulky or large transformers. This device is particularly suitable for voltage withstand testing of large high-voltage electrical equipment such as cables, transformers, GIS (gas ins
LAGI -
Unveiling the Secrets of Series Resonance Devices: From Principles to Applications
2025-12-30Have you ever thought about how to ensure the stable operation of equipment and avoid potential "high-voltage startles" in a massive power system? Among them, the series resonant device plays a crucial role. Today, let's unveil its mysterious veil together and see what it is and how it works.What is series resonance?Simply put, series resonance is a circuit phenomenon where when the reactance of inductance L and capacitance C in a circuit are equal, the circuit exhibits extremely low impedance, causing a sharp increase in current and voltage. In the power system, if this phenomenon occurs in inappropriate places, it may cause serious damage to equipment.Factors affecting series resonanceTo 'tame' this powerful resonant force, we need to understand its' temperament '. Several key factors can affect the occurrence and degree of series resonance:The values of inductance and capacitance are the most direct determining factors, as their values determine the frequency of
LAGI -
Still struggling with cable voltage resistance? Series resonance test, make your work twice as efficient!
2025-12-29Hi, colleagues in the power industry! Today, let's talk about a technical topic that everyone may have encountered or will definitely encounter in the future - the voltage resistance of series resonant cables. Does it sound a bit professional? Don't worry, I will try my best to explain it clearly to everyone in plain language, and I guarantee that after listening, you will feel, "Oh, so that's what happenedWhat is series resonance? Why is it closely connected to cable withstand voltage?Let's first give a brief science popularization. Series resonance, as the name suggests, is the process of connecting an inductor (such as a cable itself) and a capacitor (used to provide excitation inductance) in series, and then adding a power source. By adjusting the frequency of the power source, they reach a special "resonance" state. In this state, the voltage on the cable will be amplified many times, far exceeding the actual input voltage. This is simply too convenient for cable w
LAGI -
Shock High Voltage Generator: In Depth Analysis and Practical Guide
2025-12-29Are you curious about how those massive power equipment can still operate stably under rigorous "stress testing"? Today, let's talk about a behind the scenes hero - the surge voltage generator. It is like a "health inspector" for electrical equipment, simulating various instantaneous high voltages to check the "health status" of the equipment and ensure the safety and reliability of the power grid.What is an impulse voltage generator?Simply put, a surge voltage generator is a device that can generate short-term, high amplitude voltage pulses. The rise speed of these pulse voltages is very fast and the duration is extremely short, which can simulate the instantaneous impact of lightning strikes or other transient overvoltages on power equipment. Imagine lightning striking a high-voltage tower in an instant, producing immense energy. The surge voltage generator is designed to recreate this' lightning like test '.What are the influencing factors?It is not an easy task to ensur
LAGI
