Voltage Breakdown Test Equipment

HJC-50kV Computer-Controlled Voltage Breakdown Tester

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Key Functions and Applications:

The Voltage Breakdown Tester utilizes computer control and a human-machine dialogue interface to conduct AC voltage breakdown and withstand voltage tests on insulating medium materials. Suitable for solid insulating materials.Insulation varnishes, resins and adhesives, impregnated fiber products, laminates, mica and its products, plastics, film laminates, ceramics, and glass, etc., are tested for breakdown voltage, breakdown strength, and voltage resistance under industrial frequency voltages. The instrument quickly and accurately collects, processes, stores, displays, and prints various data during the experimental process.

Based on the standardPlease provide the Chinese content to be translated.

GB1408.1-2016 "Method for Testing Electrical Strength of Insulating Materials – Part 1: Test under Industrial Frequency; Part 2"

GB/T1695-2005"Method for Measuring the Dielectric Breakdown Voltage Strength and Voltage Resistance of Sulfur- vulcanized Rubber"

GB/T 3333-1999 "Cable Paper Industrial Frequency Dielectric Breakdown Voltage Test Method"

GB/T 1 2656-1990 "Method for Determining the AC Breakdown Voltage of Capacitor Paper"

ASTM D149- 09 Standard Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies

DL/T 3 76-201General Technical Conditions for Silicone Rubber Insulating Material Used in Composite Insulators

IEC 60243-1-2013 Insulating Materials - Electrical Strength - Test Methods - Part 1: Industrial Frequency Test

IEC 60684-2 Specification for Insulating Flexible conduits - Test methods

TestPrinciple

1、Penetrate Endurance testInspectionApply a certain voltage to the test sample and maintain it for a specific duration to consider the test sampleInsulation capable of withstanding various voltages. Insulation resistance andAbsorption ratio test, leakage current, and DC withstand voltage test Dielectric Loss Angle Measurement TestInspection can reveal many insulation defects, but since the test voltage is lower than the working voltage of the item being tested, ...Operating VoltageInsulation defects cannot be detected in time. To further reveal equipment defects, inspect the electricalInsulating water for gas equipmentPeace ensures the operability, and it is necessary to conduct communication puncture and withstand voltage tests. 

2、ItSureAn effective and straightforward method for assessing the insulation strength of electrical equipment, which is crucial for determining whether electrical appliances can be put into operation.Pivotal operationSignificance. Voltage, waveform, frequency, and internal insulation properties of the tested item during dielectric withstand tests.The distribution of pressure is uniform.The operational conditions, therefore, AC and DC breakdown, as well as withstand voltage tests, can effectively detect electrical equipment issues.ExistingMore dangerous concentrated defects. The higher the test voltage, the greater the effectiveness in detecting insulation defects.

Complete Set-Up

Step-up Components: Comprising a pressure regulator and a high-voltage transformer0 to 50KV step-up section.

Drive Components: The voltage applied to the high-voltage transformer is uniformly adjusted by the stepper motor regulating the voltage regulator.

Test Components: Data collected from voltage and current sensors, transmitted, processed, and then sent to the host computer

Computer Software: Transmits measurement and control signals collected by detection equipment to the computer via intelligent circuits. The computer controls the operation of the equipment based on the collected information and processes the test results.

Test Electrode: According to National StandardsWith equipment provided (1408.1-2006)StandardTwo electrodes, with specific specifications:Two Φ25mm x 25mm; one Φ75mm x 25mm(Additional test electrodes available upon customer request)。

AC/DC Switching Test

（1) This instrument's high-voltage output is an alternating current voltage. To obtain direct current, a high-voltage silicon stack is串联 in the original circuit, converting the test circuit to a pulsating direct current voltage. The process involves the silicon stack being pre-connected in series with the high-voltage transformer's high-voltage insulation tower, typically short-circuited with a shorting rod. For direct current testing, the shorting rod is removed, connecting the high-voltage silicon stack to the test circuit, at which point the circuit voltage becomes a pulsating direct current.

（2) The AC/DC voltage switching during the test mainly depends on whether the short-circuit rod in the high-voltage insulation tower is removed. When the short-circuit rod is removed, the voltage on the high-voltage equalizing ball is DC voltage; when the short-circuit rod is inserted, the voltage on the high-voltage equalizing ball is AC voltage. Refer to the illustration on the left for the removal and insertion of the short-circuit rod.

（3) During DC tests, the computer must also be set to DC mode; otherwise, the results will be incorrect. Simply put, AC voltage and DC voltage haveSeveral times.

Key Technical Requirements

　  Input Voltage:     AC 220 V   

High-voltage output voltage: AC 0-50kV (Alternating Current) | DC 0-50kV (Direct Current)

Test Voltage: 0-50 kV Continuous adjustable

High-voltage grading:   0-50kV (Full range, no stepped)

Boosting Rate:   0.2kV/s～2kV/s（Set according to the range.

Voltage Measurement Accuracy:（10%--99%FS）： ≤ 2％

Output Power: 3kVA

Voltage Increase Methods: Continuous Increase, Voltage Resistance, Stepwise Increase

Testing Method: Breakdown TestInspection, Voltage Resistance Test, Step Test

Test Method: Communication Test   DC Test  (Bi-functional)

Vibration Resistance Time:(Adjustable)

Leakage Current: 1～30 mACan be freely set by computer software.

Power Supply: Communication220V±10%Single-phase alternating voltage and50Hz±1%The frequency

Test Environment:Temperature:15 ～ 30Temperature: ℃, Relative Humidity:0～85%Stable operation.

  Two methods of shutdown: ①Voltage Shutdown  ②Current shutdown

Test environment options available:①Insulating sample air test  ②Insulation samples tested in oil immersion

Overcurrent protection device: Breakdown at sample applicationPower off within 0.1 seconds.

Software Features

   1During the testing process, dynamic plotting of test curves is possible. The curves can be overlaid and compared in multiple colors, with local magnification available. Any segment of the curve can be analyzed with regional magnification.

2Editable and flexible for trial data.

3Data such as test conditions and results can be automatically stored.

4The test report format is flexible and can be adjusted to meet the varying needs of different users.

5The validity of the curve data from a set of test can be manually selected.

6、Test result data can be importedEXECL,WORDDocument Editing

7Software equipment personnel management feature: experimenters can set their own experimental projects and parameters. Once their experimental content is set, others cannot access the program.

8Overcurrent protection devices are sufficiently sensitive to ensure that the sample is not broken down during breakdown.0.1SInternal power cutoff

9Durability of instrument operation: The equipment can be continuously operated without the need to shut down regularly for protection.

SoftwareOperation Interface:（①Parameter Setting Interface②Test Interface③Test Curve Interface (For technical data, please contact the manufacturer)

High-voltage Breakdown Equipment Safety Instructions:

1Equipment must be installed with a separate protective earth wire. Connecting the protective earth wire primarily reduces the strong electromagnetic interference generated during sample breakdown, and can also prevent the control computer from going out of control.

2Direct Current Test Discharge Alarm Function:During the completion of the DC test on the equipment,When the test door is opened, the equipment will automatically trigger an alarm.,The alarm will automatically cancel after the discharge device on the equipment is used to discharge..(Note: Failure to discharge after DC testing poses a risk to personal safety.,Do not directly handle the electrodes.,Remind users to discharge to prevent personal injury.)。

3The test discharge unit is integrated with the main unit, enhancing the previous functionality of having a separate discharge rod.

4The circuit of this testing equipment is equipped with multiple protection measures, mainly including: overcurrent protection, voltage drop protection, leakage protection, short-circuit protection, and DC testing discharge alarm.

5Six-level high-voltage safety shutdown control:

① Main power switch

② High-voltage Circuit Breaker (Key Switch)

③ Pressure Regulator Reset Switch

④ Test Box Door Safety Switch

⑤ Limiting current air switch on the input side of high-voltage transformer

Leakage Protection Switch

AboutHigh-voltage Breakdown EquipmentIntroductionDescription:

The difference between dielectric strength and breakdown voltage:

Dielectric Strength:It is a measure of the electrical strength of a material as an insulator. It is defined as the electrical strength at which the sample is broken through.Unit thickness withstands high voltage, unit: kV/mm or MV/m; the higher the dielectric strength, the better its quality as an insulator. Dielectric strength can also be referred to as electrical strength.

Breakdown Voltage:The maximum voltage a material can withstand as an insulator, which is also the voltage at which breakdown occurs, with the unit being:kV

How to choose the appropriate voltage breakdown tester range:

In material specifications or test reports, the pressure rating of materials is typically expressed using dielectric strength, i.e.kV/mm, the relationship between breakdown voltage and dielectric strength can be expressed by the following formula:

                                 Breakdown Voltage ValuekV）

    Dielectric StrengthkV/mm）=------------------------------------------

                                 Sample Thicknessmm）

The above formula leads to the conclusion thatThe selection of a test instrument with multiple measurement ranges depends on the thickness of the sample, namely:

              Breakdown Voltage Value(kV) = Dielectric Strength (kV/mm) x Sample Thickness (mm)

The breakdown voltage value obtained from the formula is the effective voltage value when testing the sample thickness. Therefore, it is reasonable to slightly expand the range of the voltage value after obtaining the breakdown voltage. It is recommended to increase the range after calculating the breakdown voltage.10kV-20kV。

3. Differences in voltage breakdown testers with the same voltage range but different power ratings:

In test procedures and standards, the commonly used test data is the breakdown voltage value. When there are no requirements for the output current of the instrument, the capacity value of the equipment can be ignored, and only the range of the equipment needs to be considered, which does not affect the test data.

In some test standards or requirements, it is necessary to specify the maximum output current the instrument must meet. When selecting the instrument's range, attention must also be given to the transformer's capacity value (i.e., power in kVA).

C: The relationship between output current, voltage, and power is expressed by the following formula:

                               Transformer Capacity:kVA）

      Output CurrentMA）=----------------------------------------------

                               Voltage Range:kV）

D: The GB/T 1408.1-2006 standard outlines the requirements for capacity as follows (screenshot):

4. How to choose the appropriate test electrode:

There are various specifications for test electrodes. For different materials and sizes, different electrode dimensions are chosen. The specific size is determined based on the testing standards required for the material. If there are no special requirements in the standard, the commonly used test electrodes for sheet materials are typically equal and unequal diameter electrodes.

What is the difference between voltage breakdown tests in air and in oil?

A: Test medium air: Refers to placing the test sample and electrode in the air for pressure resistance and breakdown tests.

Test medium oil: Refers to the process of fully immersing the tested sample and electrode in oil for withstand voltage and breakdown tests; typically, 25# transformer oil is used as the test medium.

C: Testing in air or oil has no effect on the test data. Generally, experiments are conducted in air unless there are specific requirements for the sample. There are two cases where testing in oil is necessary: one is when the standard specifies it, and the other is when the sample cannot be punctured due to arcing or releasing sparks when tested in air, in which case it must be tested in oil.

6. Differences between voltage breakdown test methods - uniform voltage rise, step voltage rise, and withstand voltage test:

The following voltage boost curve chart can be used to illustrate.

Equipment dimensions: Length1000mm x Width600mm x Height 1500mm

Equipment Weight:155kg

Input Voltage:220V

MeasureTryElectrode

All electrodes are in compliance.GB/T -1408-2-16 ASTM149 Standard Design and Manufacturing

Plates and Sheet Materials: Unequal Diameter Electrodes, Equal Diameter ElectrodesTapes, Films, and Narrow Strips:Thinfilm Electrode Software

Other Electrodes: SoftPipe electrodes, parallel plate electrodes, cone pin electrodes, parallel cylindrical electrodes, spherical electrodes.

Simultaneously custom-madeItTest electrodes.

Voltage Breakdown Test Equipment (Configuration List)

Equipment Commissioning and Training Instructions

To ensure the smooth operation of the purchased equipment and the user's proficiency in its use, our company is responsible for providing free installation, debugging, and technical training.

Installation and debugging:

Upon arrival of the instruments, the customer shall inspect the outer packaging of the goods. In case of any damage and the extent of it, the customer should immediately notify our company by phone or in writing. The customer may only open the packages in the presence of an installation engineer sent by our company. Otherwise, any damage to or shortage of parts of the items shall be the responsibility of the customer.{Some matters can be negotiated.}

2. Prior to installation and debugging, the customer should provide the necessary preparations and notify in advance. (The specific installation and debugging date can be negotiated between both parties.)

3.Our company will assign a dedicated person to handle the installation and debugging of the equipment, ensuring a swift setup upon arrival at the factory.Speed up usage

Training is divided into:①On-site Training②Phone guidance.

1、On-site training: After the goods arrive at the customer's location, our company will send relevant technical personnel to the customer's site to guide the on-site installation of the equipment and perform debugging to ensure that the customer can correctly master the equipment's operation methods and operate it skillfully!

2Phone guidance is available. Should customers encounter any issues during use, they can call immediately for inquiries. Our dedicated customer service engineers will provide you with answers! If the device has a non-manual issue within the warranty period, we will offer phone guidance first. If the problem cannot be resolved, we will communicate with the customer to schedule a free on-site repair. This ensures timely and effective operation of the customer's equipment!