Insulation board voltage breakdown tester

Insulation board voltage breakdown testerExperimental discharge device, automatic discharge placement of electromagnet. meet the standard

GB1408.1-2016 "Test Methods for Electrical Strength of Insulation Materials Part *"; Test under Power Frequency, Part 2

GBT13542.1-2009 Thin Films for Electrical Insulation Part *

GB/T1695-2005 "Determination method for power frequency breakdown voltage strength and withstand voltage of vulcanized rubber"

GB/T 3333-1999 "Test Method for Power Frequency Breakdown Voltage of Cable Paper" Scope 1

This part of GB/T 13542 specifies the definition, general requirements, dimensions, inspection rules, marking, packaging, and transportation of thin films for electrical insulation

Transportation and storage.

This section applies to thin films for electrical insulation,

2 Normative References

The clauses in the following documents are referred to as clauses in this section of GB/T 13542. Any citation with a date

All subsequent modification orders (excluding errata) or revised versions are not applicable to this section. However, it is encouraged to reach an agreement based on this section

The parties to the agreement are studying whether the latest versions of these documents can be used. The latest version of any referenced document without a date shall apply to this document

part

GB/T 13542.2-2009 Thin Films for Electrical Insulation Part 2: Test Methods (IEC60674-2:1988, MOD)

3 Terms and definitions

The following terms and definitions apply to this section.

3.1

Windability of winding

The winding performance of the film is used to evaluate the deformation of the rolled film, which can be measured by two aspects: offset/curvature and indentation.

3.1.1

Offset/Arc Bias Camber

When the film is opened flat, its edges do not form a straight line (offset or arc)

3.1.2

depression

sag

When a section of film is supported by two parallel rollers in a horizontal position and subjected to a certain tension, some of the film will be lower than the total

The horizontal plane. Special requirements for joint heat resistance or solvent resistance should be negotiated between the supply and demand parties.

4.4 Tube core

The film should be wound on a circular core, and the core should not shed chips, collapse, or twist under winding tension, nor should it damage the film or reduce its performance

Low. All performance and dimensions of the die, as well as their deviations, shall be negotiated between the supply and demand parties. The preferred inner diameters of the die are 76 mm and 152 mm, and the die can be

Extend the end of the film roll or align it with the end.

5 sizes

5.1 Thickness

Measure the thickness according to the method described in Chapter 4 of GB/T 13542.2-2009, unless otherwise specified in the product standard, and the measured thickness

Should be within ± 10% of the nominal value.

5.2 Width

The width should be specified in the product standard and measured according to the method specified in Chapter 6 of GB/T 13542.22009, unless otherwise specified in the product standard

Unless otherwise specified, the allowable deviation shall comply with the provisions of Table 1.

Table 1 Film Width

Unit in millimeters

width

bias

≤50

±0.5

>50~300

±1.0

>300~450

±2.0

>450

±4.0

5.3 Length

The requirements for length are specified by product standards.

The inspection rules GB/T 13542 "Thin Films for Electrical Insulation" are divided into the following parts:

Part 1: Definition and General Requirements;

Part 2: Experimental Methods;

Part 3: Biaxially oriented polypropylene thin film for capacitors;

Part 4: Polyester Film

.

This section is the first part of GB/T13542.

This section is modified to adopt IEC60674-1:1980 "Plastic films for electrical purposes - Part 1: Definitions and general requirements" (English version).

The main technical differences between this section and IEC60674-1 are as follows:

1) Added a chapter on 'Normative References';

2) Added a chapter on 'Inspection Rules'.

This section replaces GB/T 13542-1992 "General Requirements for Plastic Film for Electrical Use",

The main differences between this section and GB/T 13542-1992 are as follows:

1) Change 'reference standard' to 'normative reference document'

2) Change "skew" to "offset/arc" in Definition 3.1.1.

This section was proposed by the China Electrical Appliances Industry Association.

This section is under the jurisdiction of the National Technical Committee for Standardization of Insulation Materials (SAC/TC51),

Our drafting units are Guilin Institute of Electrical Science and Dongcai Technology Group Co., Ltd.

The main drafters of this section are Wang Xianxiu and Zhao Ping.

The previous versions of the standards replaced by this section are:

GB/T13542-1992。

6.1 The film should undergo factory inspection and type inspection.

6.2 The type inspection items refer to all the technical requirements specified in the product standard, and shall be conducted at least once every three months. When there is a change in raw materials

When the process conditions change, type inspection should also be conducted.

6.3 The batch size, sampling method, and factory inspection items of the product are specified in the product standard. Each batch of film should undergo factory inspection, and the product should be inspected

Qualified before leaving the factory. The manufacturer shall ensure that the products leaving the factory meet all technical requirements specified in the product standards.

When any of the test results does not meet the technical requirements, a set of samples should be taken from each of the other two rolls of the batch of film to repeat the test

If there is still one group that does not meet the requirements, the batch of films is considered as unqualified.

6.5 The user unit may conduct acceptance inspection according to all or part of the product standards. Preprocessing conditions shall be in accordance with GB/T13542.2-2009

Requirement 3.2 requires it to be carried out.

When requested by the user, the manufacturer shall provide a product inspection report.

7 Marking, packaging, transportation, and storage

7.1 The film roll should be wrapped in moisture-proof paper or plastic film, wrapped in a plastic bag on the outer layer, and placed in an elevated support in the packaging box, so that the film is in normal condition

Fully protected from damage and deterioration under storage and transportation conditions.

7.2 Each box of film should have clear and sturdy markings:

TVS instantaneous suppression protection technology

Multi level cyclic voltage acquisition technology:

After material breakdown, the instantaneous discharge speed is about 1/5~1/3 of the speed of light. The internationally recognized method for collecting breakdown voltage is the voltage drop method. The instantaneous decrease of the primary voltage of the transformer by a certain ratio is used to determine whether the material has broken down. Obviously, there is a deviation in recording the breakdown voltage value. The use of multi-level cyclic acquisition technology to collect the voltage after breakdown will solve this problem.

Low pass filtering current monitoring technology:

High frequency signals will be generated during the high-voltage discharge process. Both domestic and imported current collection sensors are mostly power frequency current sensors. When high-frequency signals cannot be processed during the collection process, it leads to inaccurate detection. Regardless of whether the sensor is designed using a flux gate or Hall principle, there may be an instantaneous output voltage or current signal that is too large after breakdown, thereby burning out the acquisition part of the control system. The low filtering current acquisition sensor developed by Huace processes high-frequency clutter signals accordingly. The protection module independently developed by Huace for same current collection ensures collection accuracy and protects collection components.

● Dual system interlocking technology and isolation shielding technology:

The dual system interlock technology is applied to electrical breakdown instruments, and the produced voltage breakdown instruments not only have overvoltage and overcurrent protection systems, but also have a dual system interlock mechanism. When any component has a problem or a single system fails, the high voltage will be instantly cut off.

Product Name: Voltage breakdown tester

Product models: BDJC-10KV, BDJC-50KV, BJC-100KV

Product brand: Beijing Beiguang Jingyi

Control method: computer-controlled

Compliant with standards such as GB/T1408, ASTM D149, IEC60243-1, etc

Applicable materials: rubber, plastic, film, ceramic, glass, paint film, resin, wire and cable, insulation oil and other insulation materials

Test items: breakdown voltage test, dielectric strength test, electrical strength test, withstand voltage breakdown strength test, etc

Test voltage: 10KV, 20KV, 50KV, 100KV, 150KV, etc

Voltage accuracy: ≤ 1%

Applicable materials: Insulation materials

Boosting rate: 10V/S-5KV/S

Test methods: AC/DC, withstand voltage, breakdown, gradient boosting

Control system: PLC controls voltage rise

Core components: using imported accessories

Test medium: insulating oil, air

Display mode: curve display, data printing

Other features: Wireless Bluetooth control

Equipment composition: host, computer, electrode

Electrode specifications: 25mm, 75mm, 6mm

Electrical capacity: 3KVA, 5KVA, 10KVA

Voltage endurance time: 0-8H

Security protection: Level 9 security protection

Warranty period: Three years, lifetime maintenance.

Training method: Engineer on-site training for installation

Certificate of issuance: 514 institutions, 304 institutions, scientific research institutes, and other units are all eligible

Host size: 1000 * 600 * 1400mm, 1700 * 600 * 1400mm

Host weight: 100KG, 200KG

Beiguang Product Warranty and After sales Service Commitment:

1、 Installation and commissioning: Assist in the installation of the testing machine, responsible for the transportation and commissioning of the testing machine.

2、 Acceptance criteria: The testing machine shall be accepted according to the ordered technical attachments. The final acceptance shall be conducted by the buyer, who shall test the samples provided by the user and provide a test report.

3、 Training: During installation and debugging, 2-3 operators will be trained free of charge at the instrument operation site. These operators should be long-term and stable employees selected by the demand side. After the training, they will be able to understand and apply the basic principles, software usage, operation, and maintenance of the equipment, enabling them to independently operate the equipment for sample testing and analysis, as well as perform basic maintenance.

4、 Software upgrade: Free lifetime provision of new version control software.

5、 Warranty: 1. The equipment is guaranteed for two years, with lifelong after-sales service. Parts that are not damaged by human factors will be replaced free of charge within one year. During the warranty period, the latest response time is within 2 hours after receiving the user's invitation. After confirming the fault with the user, our company will send engineers to the site for free service within 48 hours to quickly identify the location and cause of the fault, and report the cause and troubleshooting methods to the user in a timely manner.

2. During the warranty period, parts damaged by human factors will be replaced at the purchase (processing) price.

3. Continue to provide high-quality technical services to users outside the warranty period, and dispatch engineers to the user's site for repairs within 3 days after receiving the user's repair invitation. And enjoy preferential treatment for purchasing spare parts.

4. Overloading of sensors and damage to the overall circuit caused by overvoltage are not covered by the warranty.

6、 After sales management:

Our company implements computerized management, implements a regular telephone follow-up system for customers, regularly reviews the working condition of equipment, provides regular telephone guidance to users on equipment maintenance and testing to ensure normal operation, tracks customer equipment usage, and enables timely maintenance of equipment

Safety protection measures for voltage breakdown tester: Company profile

Beijing Beiguang Precision Instrument Company is a high-tech enterprise specializing in the production of testing instruments and automation equipment, with modern design and development technology and excellent production equipment. Actively focusing on the production and development of a variety of high-performance testing equipment and non-standard automation equipment, the main R&D and production products: insulation material testing instruments (voltage breakdown tester, resistivity tester, dielectric constant tester, leakage tracking tester, arc resistance tester, etc.), sponge foam testing instruments (ball drop rebound tester, compression deformation tester, indentation hardness tester, fatigue impact tester), mechanical equipment (universal tester), and other quality has reached the standard

This part of GB/T1408 specifies the test method for measuring the short-time electrical strength of solid insulation materials at power frequency (i.e. 48Hz~62Hz). This part specifies the use of liquid and gas as impregnating agents or surrounding media when testing solid insulation materials, but does not apply to liquid and gas tests

Note: This section includes methods for determining the surface breakdown voltage of group insulation materials

The clauses in the following documents are referred to as clauses in this section of GB/T 1408. Any referenced document marked with a date shall not be subject to any subsequent amendments or revisions to this section, except for errata. However, parties to agreements based on this section are encouraged to explore the possibility of using versions of these documents. The version of any referenced document without a date is applicable to this section

GB/T 1981.2-2003 Coatings for Electrical Insulation - Part 2: Test Methods (IEC 60464 "2:2001, IDT)

GB/T 7113.2-2005 Test Methods for Insulated Hoses (IEC 60684-2:1997, MOD)

GB/T 10580-2003 Standard conditions for solid insulation materials before and during testing (IEC 60212: 1971, IDT) ISO 293:1986 Plastic thermoplastic materials compression molded test specimens

ISO 294-1: 1996 Injection molding methods for plastic thermoplastic material specimens - Part 1: General principles, multi-purpose molded parts and strip specimens

ISO 294-3: 1996 Injection molding method for thermoplastic material specimens - Part 3: Small plates ISO 295:1991 Plastic thermosetting material compression molding specimens

ISO 10724:1994 Plastics Thermosetting molding compounds Injection molded multipurpose test specimens

IEC 60296: 2003 Specification for unused mineral insulating oils for transformers and switches

IEC 60455-2, 1998 Orange resin based reactive composites for electrical insulation - Part 2: Test methods IEC 60674-2: 1988 Plastic films for electrical purposes - Part 2: Test methods

The following definitions apply to this section.

When the electrical breakdown sample is subjected to electrical stress, its insulation performance is severely damaged, and the resulting test field current causes the corresponding circuit breaker to operate

Note: Breakdown is usually caused by partial discharge in the gas or liquid medium surrounding the sample and the electrode, resulting in damage to the sample at the edge of the smaller electrode (or two electrodes of equal diameter)

When the flashover sample and the gas or liquid medium around the electrode are subjected to electrical stress, their insulation performance is lost, and the resulting test circuit current causes the corresponding circuit breaker to operate. Note: The appearance of carbide channels or the breakdown of the penetrating sample can be used to distinguish whether the test is breakdown or flashover.

The breakdown voltage is the voltage at which the sample experiences breakdown under specified test conditions in a continuous boost test. The highest voltage that the sample can withstand in the step-by-step boost test, that is, at this voltage level, the sample does not experience breakdown throughout the entire time.

The electrical strength is the quotient of the breakdown voltage and the distance between the two electrodes to which the voltage is applied under specified test conditions. Unless otherwise specified, the distance between the two test electrodes should be measured according to the provisions of section 5.4 of this part. The significance of the experiment is that the electrical strength test results obtained in this section can be used to detect changes or deviations in performance relative to normal values caused by process changes, aging conditions, or other manufacturing or environmental conditions, and are rarely used to directly determine the performance status of insulation materials in practical applications. The electrical strength test values of materials can be influenced by various factors, such as:

The state of the specimen a) the thickness and uniformity of the specimen, and the presence of mechanical stress;

b) Sample pretreatment, especially drying and impregnation processes;

c) Whether there are pores, moisture, or other impurities present.

Test condition a) Frequency of applied voltage, shaping and boosting speed or time;

b) Environmental temperature, air pressure, and humidity;

c) Electrode shape, electrode size, and thermal conductivity;

d) The electrical and thermal characteristics of the surrounding medium. When studying new materials without practical experience, all these influential factors should be taken into account. This section specifies some specific conditions for quickly distinguishing materials and can be used for quality control and similar purposes. The results obtained by different methods cannot be directly compared, but each result can provide information about the electrical strength of the material. It should be pointed out that the electrical strength of most materials decreases with the increase of sample thickness between electrodes, and also decreases with the increase of voltage application time. Due to the significant impact of the strength and duration of surface discharge before breakdown on the electrical strength measured for most materials, in order to design electrical equipment with no partial discharge until the test voltage, it is necessary to know the electrical strength of the material without discharge before breakdown. However, the methods in this section are usually not suitable for providing information in this regard. Materials with high electrical strength may not be able to withstand long-term degradation processes, such as thermal aging corrosion, chemical corrosion caused by partial discharge, electrochemical corrosion under humid conditions, or electrochemical corrosion under humid conditions, all of which can lead to damage during operation at lower electric field strengths.

Metal electrodes should always be kept smooth, clean, and defect free.

Note 1: When testing thin specimens, electrode maintenance is particularly important. In order to minimize electrode damage during breakdown, stainless steel electrodes are preferred

The wire connected to the electrode should neither tilt or move the electrode, nor cause pressure changes on the sample, nor significantly affect the electric field distribution around the sample,

Note 2: When testing very thin films (e.g.<5 μ m thickness>), the product standards for these materials should specify the electrodes used, the operating procedures, and the preparation methods of the specimens.

5.1 Tests perpendicular to the surface of non laminated materials and perpendicular to the layer direction of laminated materials

5.1. 1. Plant materials and sheet materials (including paper plants, paper, fabrics, and films)

5.1. one 1 Unequal diameter electrode

The electrode is composed of two metal cylinders, with their edges rounded into a circular arc with a radius of (3.0 ± 0.2) mm. One electrode has a diameter of (25 ± 1) mm and a height of approximately 25 mm, while the other electrode has a diameter of (75 ± 1) mm and a height of approximately 15 mm. The two electrodes are placed together with uranium, with an error of within 2mm, as shown in Figure la. 1. Insulation samples undergo high and low temperature air breakdown, voltage withstand test or step test;

2. Insulation samples subjected to high and low temperature immersion in oil for breakdown, voltage withstand test or step test;

3. Insulation sample air breakdown, withstand voltage test or step test;

4. Insulation samples subjected to oil immersion breakdown, voltage withstand test or step test;

Experimental software:

1. Independent control system, modular structure for easy after-sales maintenance, beautiful and atmospheric appearance, no noise during the entire experimental process, automatic centering and positioning of the electrical level, easy operation, high safety factor, and high accuracy.

2. The operation and control are carried out by the touch screen and control panel of the device itself. If curve analysis is not required, a computer is not required.

3. If curve analysis is required, equipped with a computer, only data and curve recording functions are performed, without equipment control, avoiding the need for testers to alternate between the computer and equipment, making it more user-friendly.

4. The equipment has test parameters, and under the same test conditions, it is not necessary to set them for each test, and even after power failure, the set parameters for one test will still be remembered.

5. The experimental interface is simple and clear, with explanatory curves. Different parameters result in different curve trends, making it easy to understand.

6. The control panel is simple, with clear functional labeling and easy operation.

7. It can record and display 10 test records simultaneously, facilitating comparative analysis of test data. And any set of data that is not ideal can be discarded at any time.

8. Added USB download function, which can directly download test records from the device to the USB drive.

9. If equipped with a computer, detailed test reports can be generated, including specific information for each group, comprehensive information for multiple groups, and curves.

10. The equipment testing interface adopts a dashboard and real-time display of numbers, which is more convenient for viewing the testing process.

11. The equipment has a safety warning prompt. The test cannot start without closing the test chamber door, and a warning will pop up. When it is at full capacity (i.e. no output from the high-voltage transformer), a warning will pop up. If the door is opened during the test, the test will automatically end.

12. Using Bluetooth data transmission to solve the trouble of wall blocking and long-distance operation safety and reliability;

13. The equipment is equipped with a three color alarm light. When the green light is on, it indicates that the box door is well closed and the test can begin. When the yellow light is on, it indicates that the test box door is open and the sample can be replaced. When the red light is on, it indicates that the high voltage is greater than 0.5KV. Do not open the door at this time. The warning light will flash and sound an alarm during the discharge process after the DC test is completed. (Summary: The green light box door is closed well, the yellow light is opened with caution, and the red light has high voltage)

Instrument composition:

1. Boosting component: consisting of a voltage regulator and a boosting transformer to form the boosting part;

2. Drive components: controller and motor, uniformly regulating the boost transformer of the motor;

3. Testing components: measurement circuits composed of integrated circuits;

4. Computer measurement and control system;

5. Box control system

Instrument advantages:

1. Automatic discharge;

2. The testing error for AC voltage and DC voltage is 1%;

3. The electrode bracket adopts Y-shaped epoxy board;

4. The software can continuously conduct 10 sets of experimental comparisons;

5. Different colors of experimental curves can be overlaid for comparison;

6. The software can set current protection function;

7. Equipped with a host control area, the host can be controlled independently without a computer;

8. The host has voltage and current display functions;

9. Built in exhaust system;

10. Built in lighting function;

11. Discharge alarm device;

12. Bluetooth remote control;

13. Three color light alarm device (green light box door closed well, yellow light open door with caution, red light has high voltage);

14. Can achieve dual operation of touch screen or computer;

15. Combination programming can be implemented, and the boost and withstand times of gradient boosting can be set separately;

16. The USB download function allows for the direct download of test records from the device to the USB drive.

Introduction to two testing methods of the paint film power frequency voltage breakdown tester:

The selection of experimental methods is carried out in the system settings. It should be noted that during the communication test, a silicon stack short-circuit rod needs to be inserted. During the DC test, it is necessary to pull out the short-circuit rod of the silicon stack to avoid affecting the experimental coefficient. After the DC test is completed, discharge operation must be carried out to prevent residual electricity from causing danger to the experimental personnel. During the discharge process, if the discharge rod swings back and forth, the alarm light will flash and the buzzer will sound. It is necessary to wait for the buzzer to stop sounding and the alarm light will no longer flash before opening the test chamber door.

Introduction to three experimental methods:

Continuous Boosting: Continuous boosting is divided into two types: fast boosting and slow boosting. Fast boosting refers to the constant boosting of the sample voltage from zero at a selected boosting rate until the sample breaks down. The breakdown voltage is the voltage value at the moment of breakdown. Slow boosting is the process of increasing the sample voltage from zero to the initial voltage, and then boosting it at a selected rate until the sample breaks down. The breakdown voltage is the voltage value at the moment of breakdown.

Step by step voltage boosting: The sample voltage is rapidly boosted from zero to the initial voltage. After reaching the initial voltage, the voltage is stabilized with a gradient holding time. After the gradient time is over, the voltage is further boosted at the selected boosting rate until the next gradient voltage value is reached before stabilizing the voltage. This process continues until the sample breaks down. The determination of breakdown voltage can be divided into two situations, and the sampling method can be selected in the sample setting.

Instantaneous boost: The sample voltage directly reaches the initial voltage and is maintained at this voltage for a set time until the sample breaks down. The breakdown voltage is the voltage value at the moment of breakdown.

Equal diameter electrode

If an electrode holder is used to accurately center the upper and lower electrodes, the error is within 1 Within 0 mm, the diameter of the lower electrode can be reduced to (25 ± mm), and the difference in diameter between the two electrodes is not greater than 0.2 mm. The measured result is consistent with 5.1 one The results obtained from electrodes with different diameters may not be the same.

5. 1. one Test on 3-thick samples

When specified, boards and sheets with a thickness exceeding 3mm should be machined single-sided to (3 0 is 0 2) Then, place the high-voltage electrode on the unprocessed surface during the experiment.

Note: In order to avoid rabbit networks or due to limitations of existing equipment, samples can be prepared into smaller thicknesses through machining as needed.

5.1. 2 belts, thin films, and narrow strips

Insulation board voltage breakdown tester

Zero voltage reset protection

g、 Test leakage protection

h、 grounding protection

i、 End of experiment discharge protection

j、 Equipment malfunction alarm protection

8、 Electrode:

Electrode specifications: meet the requirements of GB/T 1408.1-2006 standard (material is brass)

1. Sheet electrode ￠ 25mm, two sheet electrodes ￠ 75mm each (standard)

2. Two enameled wire electrodes (optional)

3. Two electrode tubes (optional)

How to choose suitable test electrodes:

There are many specifications for testing electrodes, and different electrode sizes are selected according to the testing standards required for material testing based on different materials and specifications. If there are no special requirements in the standards, the most commonly used testing electrodes for sheet materials are equal diameter and unequal diameter electrodes.

Composition of the whole machine: 1. Boosting component: consisting of a regulator and a high-voltage transformer, it is the 0-50KV boosting part. 2. Moving parts: The voltage regulator is uniformly adjusted by a stepper motor to change the voltage applied to the high-voltage transformer. 3. Testing component: a measurement circuit composed of integrated circuits. Transmit the detected analog signal and switch signal to the computer through the signal line. 4. Computer software: transmits the measurement and control signals collected by the detection equipment to the computer through intelligent circuits. The computer controls the operation of the equipment and processes the test results based on the collected information. 5. Test electrode: According to the standard (1408.1-2006), three electrode body specifications are provided with the equipment: two with a diameter of 25mm and two with a diameter of 25mm; One with a diameter of 75mm x 25mm.

Two pieces of Ø 25mm × 25mm; One with a diameter of 75mm x 25mm.

Operation steps:

1. Preparation before the experiment:

1) Turn on the main power switch on the right side of the testing machine and preheat for 15 minutes.

2) Open the computer and enter the Windows system. Double click the shortcut icon of this instrument software to open the test login interface, enter the login password to enter the test interface.

1) The high voltage output of this instrument is AC voltage.

2) Front panel DC/AC selection button.

3) The switching of AC/DC voltage in the experiment mainly depends on whether the short-circuit rod in the high-voltage insulation tower is removed.

4) In DC testing, the computer should also choose the DC state, otherwise the measured results will be incorrect.

Product advantages:

The Siemens CPU central unit processor is currently a high-precision and stable acquisition system

The elimination of the original 51 microcontroller resulted in poor control and acquisition accuracy, high interference signals, and long PLC cables. Especially when the DA module uses voltage signal output, there is a significant voltage drop in the circuit, which affects the stability and reliability of the system. CPUs are widely used in professional signal processing applications for communication equipment servers in China, such as China Unicom and China Mobile. Wireless Bluetooth control is more convenient for human-machine separation due to distance constraints. (Getting rid of the problem of slow signal propagation and command delay caused by long data cables, it is precisely because wireless Bluetooth enables our instruments to have features such as supporting more computers to operate simultaneously).

The automatic alarm system for instrument malfunctions provides greater safety assurance for operators.

When there is a fault in the circuit, the instrument will automatically alarm to provide greater protection for personnel safety. This alarm system is not related to fault alarm, test discharge alarm, or software alarm. Equipped with network port sharing function, it allows more personnel to operate the test results and store them on the office computer, making the report clearer and simpler (its principle is as convenient as sharing a printer)

Operation interface: Observant users can see from the experimental software diagram that the current is collected in real-time. Unlike other manufacturers, our electrical breakdown instrument has the ability to collect real-time current and draw curves. Other manufacturers cannot achieve current drawing curve collection due to poor collection accuracy

control function

During the testing process of this device, the test curve can be dynamically drawn, and the test curve can be overlaid and compared with multiple colors.

2. The experimental data can be edited and modified, making it flexible and applicable;

3. The experimental conditions and test results can be automatically stored;

4. The format of the test report is flexible and adaptable to meet the different requirements of different users.

5. The validity of curve data in a set of experiments can be manually selected.

6. The experimental result data can be imported into EXECL.

7. Software equipment personnel management function, where test personnel can set their own test items and parameters, and others cannot enter after setting their own test content.

Definition of thin film voltage breakdown tester:

Electrical breakdown: When subjected to electrical stress, the insulation performance of the sample is severely damaged, causing the test circuit current to trigger the corresponding circuit breaker to operate.

Breakdown is usually caused by partial discharge in the gas or liquid coal surrounding the pattern and electrode, resulting in damage to the pattern of the smaller electrode or the edges of the two equal diameter electrodes.

Flashover: When the gas or liquid coal around the electrode is subjected to electrical stress, its insulation performance is lost, and the resulting test circuit current causes the corresponding circuit breaker to operate

The appearance of carbide channels or the breakdown of penetration patterns can be used to distinguish whether the test is breakdown or flashover.

Breakdown voltage: The voltage at which breakdown occurs in a continuous boost test under specified test conditions.

The high voltage that the pattern can withstand does not cause breakdown throughout the entire time at that voltage level.

Electrical strength: The quotient of the breakdown voltage and the distance between the two electrodes to which the voltage is applied under specified test conditions.

The obtained electrical strength test results. It can be used to detect changes or deviations in performance relative to normal values caused by process changes, aging conditions, or other manufacturing environmental conditions, and is rarely used to directly determine the performance status of insulation materials in practical applications.

The electrical strength test values of materials can be influenced by multiple factors, including:;

The state of the style

a， The thickness and uniformity of the pattern, and the presence of mechanical stress;

b， Pre treatment of the style, especially the drying and soaking process

c， There are gaps in every situation. Moisture or other impurities.

Condition for Style:

The frequency, waveform, and boosting speed or duration of the applied voltage

B Environmental temperature, air pressure, and humidity

C electrode shape, electrode size, thermal conductivity

The electrical and thermal characteristics of the surrounding medium

When studying new materials without practical experience, all these influencing factors should be taken into account. The above specifies some specific conditions to quickly distinguish materials and can be used for quality control and similar purposes.

The results obtained by different methods cannot be directly compared, but each result can provide material electrical strength data. It should be pointed out that the electrical strength of most materials decreases with increasing distance between electrodes and also with increasing applied voltage.