Wuhan GDZX Power Equipment Co., Ltd

On Site Usage Method of Sf6 Purity Micro Water Comprehensive Tester Measurement Method of SF6 Purity Micro Water Comprehensive Tester

1. Initialize Turn on the power switch of the instrument, and the instrument enters the initialization self calibration process, which takes 8 minutes. 2. Check battery level When using direct current, please check the battery level displayed in the upper right corner. If the battery level is below about 10% (indicated in red), please shut down and charge before continuing to use. 3. Preparation work (recommended) Before measuring SF6 equipment, use SF6 high-purity gas to fill the equipment: apply high-purity SF6 to the equipment, and after stabilization, the equipment can be filled to achieve correction. 4. Connecting SF6 devices Close the flow control valve on the panel of the SF6 purity micro water comprehensive tester. Insert one end of the quick connector on the testing pipeline into the inlet of the gas purity meter; Connect the threaded end of the measuring pipeline to the switch joint and tighten it with a wrench.     Connect the exhaust pipe to the air outlet. 5. Start measuring   Slowly adjust the flow valve to around 500ml/min and start measuring.   6. Storing data   After the equipment measurement is completed, the data can be saved in the instrument. Please refer to the following section for specific operation methods.   7. Measuring other equipment   After measuring a device, close the regulating valve. Remove the adapter from the SF6 electrical equipment.   8. Measurement completed   After all equipment measurements are completed, turn off the instrument power.   Precautions for SF6 high-precision micro water measuring instrument   (1) The instrument should be protected from collision, compression, and severe vibration during transportation or testing.   (2) Do not test corrosive gases.   (3) Before using the SF6 purity micro water comprehensive tester, it should be charged in a timely manner. It is best to use battery power during operation. When charging, simply connect the power cord to a 220V socket without turning on the power switch, and the instrument will automatically charge.   (4) When the instrument is left unused for a long time, it should be regularly charged and discharged to extend the battery life.   (5) Measure clean gas with a pressure less than 1mpa.   (6) The use of specialized PTFE intake pipes is not allowed to be replaced arbitrarily.   (7) The instrument settings are adjusted before leaving the factory, please do not modify them.   GDZX is a professional manufacturer of secondary protection testing equipment, with a wide variety of instrument and equipment types to choose from. Guodian Zhongxing serves you at 4000-828-027. To learn more, visit GDZX's official website at www.gdzxdl.com.

Operation Steps and Precautions for SF6 Gas Leak Detector Test

Operation steps of SF6 gas leak detector   1. Turn on the power switch of the instrument, and the screen light will be on.   2. The LCD screen displays the startup interface, and the instrument enters normal operation after preheating. The initialization will perform a self check on the hardware. The initialization time is approximately 10 seconds.   3. After entering the second screen, the instrument initialization is completed and enters standby mode“ ♥” It will not flash. The standby interface will display "detection value: 0000ppm", "maximum value: 0000", and battery level.   Attention: When initializing the SF6 gas leak detector, it should be kept free of smoke in the ambient air. SF6 gas or choose to stay away from the detection point. After about 10 seconds, the instrument will automatically enter the second screen interface.   4. Perform start stop detection by pressing the "Measure" button on the panel. The instrument enters the detection state“ ♥” It will briefly flash and emit a work prompt sound, and the work indicator light on the handle will slowly light up. When the measured concentration is high, the measurement value on the LCD screen will also continuously increase. The instrument will automatically record the maximum measurement value and compare the real-time measurement value with the previous maximum value. The closer the measurement value is to the maximum value, the more alarm indicator lights will light up, and the frequency of the work prompt sound will also be higher.       5. After using the SF6 gas leak detector, turn the instrument power switch to the off position. Then place the instrument and probe back into the chassis.   6. Charging: When the whole machine is working and the battery level graph is empty, it indicates that the battery level is insufficient. At this time, charging is required   Electrical appliances charge instruments. The specific steps are to plug the randomly carried charger plug into the upper left plug of the instrument, and plug the other end of the charger's two core plug into the AC 220V. At this point, the light is on. Indicates that the instrument is charging, and if charged for 5 hours, the instrument can operate for more than 12 hours.   Precautions for SF6 gas leak detector test   Before starting up, the operator should first carefully read the operating instructions and strictly follow the steps for starting up and shutting down the instrument.   It is strictly prohibited to place the probe gun on the ground, and the probe hole must not be filled with dust, water, or oil. It must not be dropped or damaged to avoid affecting the performance of the instrument.

The application of the test method of the resonant voltage resistance of the cab

Cable resonance withstand voltage test The resonant voltage withstand test method is to change the inductance and test frequency of the test system, so that the circuit is in a resonant state, so that most of the capacitive current on the test circuit and the inductive current on the reactor are offset, and the energy supplied by the power supply is only the study power consumed in the circuit, which is 1/Q of the capacity of the test product (Q is the resonant multiple of the system). Therefore, the capacity of the test power supply is reduced, and the weight is greatly reduced. The resonant withstand voltage test system can be divided into two kinds according to the regulation mode: the modulated induction type and the modulated frequency type. The adjustable inductance type resonant test system can meet the requirement of withstand voltage, but because of its large weight and poor mobility, it is mainly used in the laboratory. Frequency conversion series resonance voltage withstand test uses the inductance of the reactor and the capacitance of the subject to achieve capacitor resonance, and obtains high voltage and high current on the subject. It is a new method and trend of high voltage test at present, and has been widely used at home and abroad. Frequency conversion series resonance is a resonant current filter circuit, which can improve the waveform distortion of the power supply, obtain a better sinusoidal voltage waveform, and effectively prevent the harmonic peak to the test product. Frequency conversion series resonance works in the resonance state, when the insulation point of the subject is broken down, the current is immediately detuned, and the loop current rapidly drops to one tenth of the normal test current. When a flashover breakdown occurs, due to the loss of resonance conditions, in addition to the short circuit current immediately decreases, the high voltage also immediately disappears, and the arc can be extinguished. The re-establishment process of the recovery voltage is very long, and it is easy to disconnect the power supply when the flashover voltage is reached again, so it is suitable for the insulation withstand voltage test of high voltage and large capacity power equipment.   The frequency conversion resonance test system can not only meet the requirements of high voltage XLPE cable, but also has the advantages of light weight and good mobility, which is suitable for field test. After analysis and comparison, the frequency conversion series resonance test device uses a fixed reactor as a resonance reactor to achieve resonance in the way of frequency modulation, the frequency adjustment range is 30~300Hz, in line with the national standard "Electrical equipment handover test Standard" (GB50150-2006) recommended to use a frequency of 20~300Hz resonance voltage test. Notes on resonance withstand voltage test (1) Most of the resonant power supply products are high-voltage test equipment, which is required to be used by high-voltage test professionals, and should be carefully read the instruction manual before use, and repeated operation training. (2) The operator shall be no less than 2 persons. When used, the unit should strictly abide by the safety operation rules of high-pressure test. (3) In order to ensure the safety and correctness of the test, in addition to being familiar with the product manual, the test operation must be carried out in strict accordance with the relevant national standards and regulations. (4) Each connection line can not be connected wrong, especially the ground line can not be connected wrong, otherwise it can cause damage to the test device. (5) When the device is used, the output is high voltage or ultra-high voltage, must be reliably grounded, pay attention to the safe distance of operation. (6) Series resonance test system is the use of resonant reactor and the test product resonance to produce high voltage, that is to say, can produce high voltage is mainly to see whether the test product and resonant reactor resonance, so the test personnel in the analysis of the site can not produce the required high voltage, should analyze what damage the resonance conditions, the loop is connected and so on. (7) The series resonance test system of the excitation transformer has specific voltage and current requirements, in the selection of substitutes, must consider the voltage and current, can not use just the same capacity of the ordinary test transformer. GDZX is a professional manufacturer of secondary protection testing equipment, with a wide range of instruments and equipment to choose from. GDZX is at your service: 4000-828-027, for more information visit GDZX official website: www.gdzxdl.com。  

Cable insulation resistance testing instruments and on-site testing methods

Cable insulation resistance test The test of cable insulation resistance refers to the measurement of insulation resistance between cable cores and between cable cores and skin. It can preliminarily determine the defects of cable insulation aging due to moisture, and can also determine whether there are any defects in the insulation of the cable during the withstand voltage test. The DC resistance of the cable conductor can be measured using the bridge method or the voltage drop method. When measuring the DC resistance of the conductor of a phase cable, other phase cables can be used as voltage and current leads at the other end. The simple and basic method is the megohmmeter method Measuring cable insulation resistance with a megohmmeter The measurement of insulation resistance includes direct measurement method, comparison method, charging method, and self discharge method;   The direct method is a commonly used measurement method, which applies a known stable DC voltage to the tested workpiece. Determine the insulation resistance by the steady-state current of the tested object. Test methods for insulation resistance testers The L terminal is connected to the cable core, using a connection wire with high insulation resistance and being careful not to place it on the ground or come into contact with other objects. The E terminal of the megohmmeter is connected to the cable sheath and ground. To eliminate the impact of surface leakage current, the G terminal should be connected to the shielding ring of the insulation at the end of the cable core. For the sake of comparison, the insulation resistance values measured at different temperatures are generally converted into values at a temperature of 20 ℃ and a length of 1Km. Precautions for measuring cable insulation resistance Before the test, the conductor core and cable metal sheath must be grounded to fully discharge, and an appropriate megohmmeter must be selected based on the rated voltage of the tested cable At the same time, wipe the surface of the cable terminal clean and perform surface shielding. When measuring, the megohmmeter should be placed in a stable and free from significant vibration place, and the megohmmeter should be checked for normal operation according to relevant requirements; After each insulation resistance measurement, the cable should be discharged. The longer the grounding cable line, the longer the grounding time, usually no less than 1 minute. Guodian Zhongxing is a professional manufacturer of secondary protection testing equipment, the production of instruments and equipment, a variety of models to choose from. Guodian Zhongxing is at your service: 4000-828-027, for more information, visit GDZX official website：www.gdzxdl.com.

Looking Back On 2019 -GDZX

One of the Major events [undertakes power protection projects for 35 stadiums and 107 hotels in the 7th World Military Games]     After winning the bid for the Baoding Power Project, we are facing severe tests and challenges. This is not only a political task, but also a basic guarantee for the smooth progress of the entire military games. Time is tight and tasks are heavy. In just three months, we successfully completed the power maintenance work of the opening ceremony of the Military Games with high standards of power protection specifications, effective organizational support, reliable technical measures, and strict work discipline. On October 18th, the 7th World Military Games, which attracted worldwide attention, opened in Wuhan. The wonderful opening ceremony attracted the attention of hundreds of millions of people around the world. Behind this wonderful, it is the silent adherence of all company personnel. Major event two [General industrial and commercial electricity sales services] 2019 is the second year of Hubei's power reform, and it is an important measure for the provincial government to continue to reduce the production and operation costs of operating enterprises. As of the end of this year, the accumulated electricity consumption reduction and exemption for industrial and commercial users through the sale of electricity purchase services has exceeded 11.4 million yuan. As more power users participate in the power reform, the barriers to entry will also decrease year by year, and more companies will enjoy the dividends brought by this wave of reform. Opportunities and challenges co-exist, hoping to be better next year! Major event Three [Electric Power Detection Equipment Exceeds 150 Million Output Value] In 2019, electric power testing instruments and power companies in various provinces across the country won the bid to complete the task and respond to the One Belt One Road strategy. Participated in the one-time operation of the 220KV power transmission and transformation project in the Congo, and achieved the power supply target to CNMC in advance.At the same time , The export international market grew steadily 10 million yuan sales , providing a strong guarantee for the construction of the national power grid! Major event Four [ Smart Energy Comprehensive Technology Services] In 2019, the provincial smart energy comprehensive technology platform developed by the State Grid NanRui Research Institute commissioned our company to conduct a trial run with several universities in Wuhan for trial. Grafting electricity measurement points, real-time information such as power loss and short circuit with data and graphs are displayed on the large LED screen, which greatly reduces the maintenance manpower and time, and achieves no-blackout treatment effect. Promote the use of most of the power consumption enterprises in the province in 2020 and beyond. At that time, enterprises will not need to hire professional electricians and maintenance personnel, which will reduce the burden for enterprises in disguise.     In 2020, we believe everything will be better！Thank new old customers for their support for GDZX in 2019. Our growth cannot be separated from your encouragement. GDZX will walk with you and focus on technical services and R & D to provide more Good product and technical support！  

GDZX welcome Cooperation Orders

      Recently, Wuhan GDZX Power Equipment Co., Ltd. ushered in a number of cooperation orders. The equipment cooperated with customers this time is the loop resistance tester independently developed and produced by GDZX.           The loop resistance tester produced by GDZX is designed by using a combination of high-frequency switching power supply technology and digital circuit technology. It is suitable for the measurement of the loop resistance of switch control equipment. The test current is 100A DC recommended by national standards. The loop resistance can be directly measured at a current of 100A and displayed digitally. The instrument has accurate measurement and stable performance, which meets the requirements of on-site high-voltage switch repair and high-voltage switch factory loop resistance test in the power and power supply departments.     After learning about our company's loop resistance tester products, the customer decisively placed an order for a total of 45 units. Currently, 22 units have been delivered and the remaining 23 units are in urgent production. GDZX adheres to the concept of "product quality is the most important, customer service is paramount", and provides high-quality products and services to customers and friends. We welcome friends from all walks of life to come and look forward to working with you for your sincere cooperation.

Welcome Mexican customers to visit 8th,Nov.

      Mexican customer visits GDZX on 8th,Nov. Customers need to purchase a batch of electrical testing equipment, and the two sides have a friendly exchange in the conference room of the company.   At the meeting, the customer first watched the promotional video of our company and made a brief introduction. After preliminary understanding, the customer expressed his affirmation on the comprehensive strength of our company. After the meeting, accompanied by the company's leaders, the customer visited the company's high-pressure workshop, low-pressure workshop, exhibition hall, factory and so on. On-site operation, demonstration and explanation of the high-voltage switch dynamic characteristic tester and DC resistance testerthat are of interest to customers. The customer expressed satisfaction with the products of GDZX. After visiting the sample room, we returned to the conference room and the customer showed us their company, We also have a general understanding of their company.They are a very strong company with a wide range of businesses. After the visit, the customer had a deeper understanding of GDZX. In the subsequent conversation, the two sides reached a further consensus on the cooperation intention. With its strong technical strength, advanced production technology, excellent product quality and perfect service system, GDZX has become a manufacturer that is highly praised and trusted by customers in similar industries. We adhere to the principle of "customer first, service first", so that GDZX has won the trust of customers in power equipment and established a good corporate image. The equipment produced by GDZX is of good quality and the service is guaranteed. We sincerely welcome customers from all walks of life and industry peers to exchange and cooperate, on-site inspection, visit and negotiation; we will be happy to provide you with quality solutions.

GDZX Equipment Delivery

Power detection instrumentation is one of the main projects of GDZX. For more than ten years, GDZX has continuously improved and improved the performance of instrumentation and testing. The products supplied to various scientific research institutions, universities and power companies all over the country include: high-voltage withstand voltage test equipment, power engineering testing equipment, power automation complete control system. "Opportunity awaits those who are prepared". GDZX has won the support and recognition of its customers with its excellent quality and excellent service. Recently, a batch of equipment purchased by our customers in our company has been successfully accepted and ready for delivery. As a benchmarking brand in the power inspection industry, GDZX has always demanded itself with high standards and made good products. It is determined not to let an unqualified product flow into the factory area and reach the users. It is GDZX that has never slacked off its products and services to win the support and trust of our customers and stand at the top of the industry. We will strive to be your stable and reliable partner ！