工频电压击穿、直流电气强度试验机

工频电压击穿、直流电气强度试验机  结构原理及性能特点：

1、主要由升压系统、测量系统、A/D转换器、放电系统、电极、油箱、电极定位架、计算机数据处理系统、软件等组成；

2、计算机---A/D转换器---测量控制系统---调压装置---升压变压器---试样；

3、高压变压器主要产生试样所需的直流电压；

4、调压器用于调节升压变压器输入端电压以产生高压所需的输入电压；

5、电压测量主要是从高压变压器测量端测量，高压变压器测量端和高压端是线性的；

6、放电系统在试验做完以后放电，以免产生放电对人身的危害；（当试验结束后，机器部件仍可能存在残留的高电压，此残留电压足以对人产生致命的伤害，配备此棒，完好的解决此安全隐患）。

工频电压击穿、直流电气强度试验机  本仪器由pc控制，通过我公司自主研发的全新智能数字精密嵌入式西门子 单元cpu系统与上位机软件控制两部分来完成，通过pc USB 串口获得数据传送数据 可高达 3M/S是RS232串口 的 让上位机与下位机通讯无延迟使升压速率真正做到匀速、准确，并能够准确测出漏电电流的数据，电流实时采集。可实时绘制试验曲线，显示试验数据，判断准确，并可保存，分析，打印，修改试验数据。并且提取试验数据分色对比。人性化明显

常规型号：

BDJC-10KV（1万伏）主要用于薄膜材料，丙烯薄膜聚乙烯薄膜.聚酯薄膜，流延聚丙烯薄膜，一般厚度为1-3mm

BDJC-30KV（3万伏）主要适用于橡胶，绝缘漆漆膜，聚氨酯，硫化橡胶等推荐可测厚度2-3mm

BDJC-50KV（5万伏）主要用于电缆纸，电容器纸，云母，陶瓷，推荐可测厚度为2-3mm

BDJC-100KV（10万伏）适用于玻璃，层压材料，橡胶，树脂，推荐可测厚度为2-5mm

BDJC-150KV（15万伏） 适用于塑料、橡胶、层压材料、薄膜、树脂、云母、陶瓷、玻璃、绝缘漆等绝缘材料,推荐可测厚度为1-6mm

参数：

1 试验变压器

1.1 输出电压： AC  0-5000V，DC 0-5000V；

1.2 输入电压：220v

1.3 额定容量下，长期连续运行；

1.4 输出电压下，PD≤1pC；

1.5 噪声≤58dB（1m位置测量）。

2 调压器

2.1 输入电压：220V；

2.2 额定容量：3kVA（如果有补偿，可以小于15kVA，但不小于10kVA）；

2.3额定容量下，长期连续运行；

2.4噪声≤58dB（1m位置测量）;

2.5 电动调压。

3 高压分压器

3.1 高压臂电容：1nF；

3.2 分压比：700（可讨论，结合测量控制系统）；

3.3 额定容量下，长期连续运行；

3.4 输出电压下，PD≤1pC；

3.5 测量精度：1%。

4 计算机控制

4.1 蓝牙连接；

4.2 安全保护；

5 试验电极

5.1 满足GB/T 1408-2006 绝缘材料电气强度试验方法；

5.2 满足GB/T 1695-2005 硫化橡胶工频电压击穿强度和耐压强度试验。

击穿电压也是评定绝缘油电气性能的一项指标，可用来判断绝缘油含水和其他悬浮物污染的程度，以及对注入设备前油品干燥和过滤程度的检验。对清净干燥的油施加一个逐渐升高的电压时，在电压的负 会发射击电子。当电子具有足够能量时，可以使油分子微化离解。

于是整个离解过程随电压升高而加强，当达到某一个电压后，会产生大量传导电流而形成电弧，这种现象被称为击穿。若油中有水或固体物存在时，则会使击穿电压变小，这是由于水和固体物的导电性均比油大之缘故。运行中油的击穿电压低是变压器工作危险的信号。

试样的处理

⑴用绸布蘸对试样无腐蚀作用的溶剂,擦净试样。

⑵预处理和条件处理：处理条件和方法可根据产品的性能要求从本标准附录表1和表2中选取。有特殊要求的可由产品标准另行规定。

⑶绝缘材料的电气强度随温度和含水量而变化。除被试材料已有规定外者，试样应在23±2℃，相对湿度（50±5）%的条件下处理不少于24h。

⑷经过受潮或浸液体媒质的试样在试验前应用滤纸轻轻吸去液滴，从试样取出到试验完毕不应超过5分钟。

Structural principles and performance characteristics:

1. It mainly consists of a boost system, a measurement system, an A/D converter, a discharge system, electrodes, an oil tank, an electrode positioning frame, a computer data processing system, software, etc;

2. Computer - A/D converter - Measurement and control system - Voltage regulating device - Step up transformer - Sample;

3. High voltage transformers mainly generate the DC voltage required for the sample;

4. A voltage regulator is used to regulate the input voltage of a step-up transformer to generate the required input voltage for high voltage;

5. Voltage measurement is mainly measured from the measuring end of the high-voltage transformer, which is linear with the measuring end of the high-voltage transformer;

6. The discharge system discharges after the experiment is completed to avoid the harm of discharge to personnel; After the experiment is completed, there may still be residual high voltage in the machine components, which can cause fatal injuries to people. Equipping this rod can effectively solve this safety hazard.

This instrument is controlled by a PC and completed through our company's independently developed new intelligent digital precision embedded Siemens central unit CPU system and upper computer software control. The data transmission data can reach up to 3M/S through the PC USB serial port, which is incomparable to the RS232 serial port. It enables communication between the upper computer and the lower computer without delay, achieving a truly uniform and accurate boost rate, and can accurately measure leakage current data, with real-time current acquisition. Real time drawing of experimental curves, display of experimental data, accurate judgment, and the ability to save, analyze, print, and modify experimental data. And extract experimental data for color comparison. Clearly humanized

仪器优势:

　　TVS瞬间抑制防护技术：

　　目前国内材料电压击穿试验仪采用的光耦隔离方式，但光耦与隔离无非是提高仪器的采集的抗干扰处理。对于电弧放电过程中的浪涌对控制系统的防护起不到任何作用。这也就是国产仪器维护率过高的主要原因。而我公司独立开发的TVS瞬间抑制防护技术，将起到对控制系统的 防护。

　　多级循环电压采集技术：

　　材料击穿后，瞬间放电速度约为光速的1/5～1/3,国际通用的方法为压降法进行采集击穿电压。即变压器的初级电压瞬间下降一定比率来判别材料是否击穿。显然记录击穿电压值产生偏差。而采用多级循环采集技术对击穿后的电压采集将解决此难题。

　　低通滤波电流监测技术:

　　高压压放电过程中将产生高频信号。而无论是国产与进口电流采集传感器，大都为工频电流传感器。而采集过程中无法将高频信号处理。从而造成检测不准确。同时 无论是采用磁通门或霍尔原理都存在击穿后瞬间输出电压或电流信号过大，从而烧坏控制系统的采集部分(隔离只起到屏蔽)。开发的低滤波电流采集传感器将 高频夹波信号处

　　理后，传入PLC同时采用稳压技术而保证电流采集精度与保护采集元件。

　　双系统互锁技术及隔离屏蔽技术：

采用双系统互锁技术应用于电击穿仪器，目前电压击穿仪器大都具备过压、过流保护系统，假如，过压或过流元失效，何来防护试验仪器及操作人员安全。而我公司 的双系统相互制约，当任何元器件出现问题或单系统出现故障时，将瞬间切断高压。

Regular model:

BDJC-10KV (10000 volts) is mainly used for film materials, including acrylic film, polyethylene film, polyester film, and cast polypropylene film, with a general thickness of 1-3mm

BDJC-30KV (30000 volts) is mainly suitable for rubber, insulation paint film, polyurethane, vulcanized rubber, etc. It is recommended to measure thicknesses of 2-3mm

BDJC-50KV (50000 volts) is mainly used for cable paper, capacitor paper, mica, ceramics, with a recommended measurable thickness of 2-3mm

BDJC-100KV (100000 volts) is suitable for glass, laminated materials, rubber, and resin, with a recommended measurable thickness of 2-5mm

BDJC-150KV (150000 volts) is suitable for insulation materials such as plastics, rubber, laminates, films, resins, mica, ceramics, glass, insulation paints, etc. It is recommended to measure thicknesses of 1-6mm

Instrument advantages:

TVS instantaneous suppression protection technology:

At present, the optocoupler isolation method used in domestic material voltage breakdown testers is mainly to improve the anti-interference processing of the instrument's data collection. The surge during the arc discharge process has no effect on the protection of the control system. This is the main reason for the high maintenance rate of domestic instruments. Our company's independently developed TVS instant suppression protection technology will provide absolute protection for the control system.

Multi level cyclic voltage acquisition technology:

After material breakdown, the instantaneous discharge speed is about 1/5 to 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. However, high-frequency signals cannot be processed during the collection process. This leads to inaccurate detection. At the same time, whether using the flux gate or Hall principle, there is a risk of excessive output voltage or current signal after breakdown, which can burn out the acquisition part of the control system (isolation only serves as shielding). The developed low filtering current acquisition sensor will capture high-frequency clamping signals at the location

After processing, the input to the PLC adopts voltage stabilization technology to ensure the accuracy of current acquisition and protect the acquisition components.

Dual system interlocking technology and isolation shielding technology:

The dual system interlock technology is applied to electrical breakdown instruments. Currently, most voltage breakdown instruments have overvoltage and overcurrent protection systems. If the overvoltage or overcurrent element fails, how can the safety of the testing instrument and operators be protected. And our company's unique dual system mutual restraint, when any component has a problem or a single system fails, the high voltage will be instantly cut off.

Parameters:

1. Test Transformer

1.1 Output voltage: AC 0-5000V, DC 0-5000V;

1.2 Input voltage: 220V

1.3 Long term continuous operation at rated capacity;

Under the maximum output voltage of 1.4, PD ≤ 1pC;

1.5 Noise ≤ 58dB (measured at 1m position).

2 regulators

2.1 Input voltage: 220V;

2.2 Rated capacity: 3kVA (if compensated, it can be less than 15kVA, but not less than 10kVA);

2.3 Long term continuous operation at rated capacity;

2.4 Noise ≤ 58dB (measured at 1m position);

2.5 Electric voltage regulation.

3 High Voltage Dividers

3.1 High voltage arm capacitance: 1nF;

3.2 Voltage division ratio: 700 (negotiable, combined with measurement and control system);

3.3 Long term continuous operation at rated capacity;

3.4 Under maximum output voltage, PD ≤ 1pC;

3.5 Measurement accuracy: 1%.

4 Computer Control

4.1 Bluetooth connection;

4.2 Security protection;

5 Experimental electrodes

5.1 Comply with GB/T 1408-2006 Electrical Strength Test Methods for Insulation Materials;

5.2 Meet the GB/T 1695-2005 standard for power frequency voltage breakdown strength and withstand voltage strength tests of vulcanized rubber.

The breakdown voltage is also an indicator for evaluating the electrical performance of insulating oil, which can be used to determine the degree of water content and other suspended matter pollution in the insulating oil, as well as to inspect the drying and filtering degree of the oil before injection into the equipment. When a gradually increasing voltage is applied to clean and dry oil, electrons will be emitted at the negative terminal of the voltage. When electrons have sufficient energy, they can cause the micro dissociation of oil molecules.

So the entire dissociation process strengthens with the increase of voltage, and when a certain voltage is reached, a large amount of conduction current is generated to form an arc, which is called breakdown. If there is water or solid matter in the oil, it will reduce the breakdown voltage, because the conductivity of water and solid matter is higher than that of oil. The low breakdown voltage of oil during operation is a signal of danger in transformer operation.

Sample processing

Dip a silk cloth in a solvent that has no corrosive effect on the sample and wipe it clean.

⑵ Preprocessing and Conditional Processing: The processing conditions and methods can be selected from Appendix Table 1 and Table 2 of this standard based on the performance requirements of the product. Special requirements may be specified separately by product standards.

The electrical strength of insulation materials varies with temperature and moisture content. Unless otherwise specified for the test material, the sample should be treated for at least 24 hours under conditions of 23 ± 2 ℃ and relative humidity (50 ± 5)%.

The sample that has been dampened or immersed in liquid media should be gently removed with filter paper before the test. The time from taking out the sample to the end of the test should not exceed 5 minutes.

　　击穿电压也是评定绝缘油(包括变压器油、电容器油、电缆油等)电气性能的一项指标，可用来判断绝缘油含水和其他悬浮物污染的程度，以及对注入设备前油品干燥和过滤程度的检验。

　　对清净干燥的油施加一个逐渐升高的电压时，在电压的负 会发射电子，当电子具有足够能量时，可使油分子微化离解，于是整个离解过程随电压升高而加强，当达到某一个电压后，会产生大量传导电流而形成电弧，这种现象被称为击穿，此时的电压被称为击穿电压。若油中有水或固体物存在时，则会使击穿电压变小，这是由于水和固体物的导电性均比油大之缘故。运行油中的击穿电压低是变压器工作危险的信号。

　　对于变压器油国内外标准，规定的击穿电压一般在40-50 kV ，高的达60kV 甚至更多。

适用材料：

主要适用于固体绝缘材料如：电线套管、树脂和胶、浸渍纤维制品、云母及其制品、塑料薄膜、陶瓷、玻璃、绝缘漆、硫化橡胶、电缆纸、绝缘漆漆膜、硬质橡胶、纸板等绝缘介质在空气或液体介质中，测量工频（48~62Hz）或对应直流电压下击穿强度和耐电压时间。适用于连续均匀升压或逐级升压的方式，对试样施加交流/或直流，电压直至击穿，测量击穿电压值，计算试样的击穿强度；用迅速升压的方法，将电压升到规定值，保持一定的时间试样不击穿，定此时规定值为试样的耐电压值。软件系统操作方便，性能稳定，安全可靠。

试验环境：

⑴常态试验环境：

温度为20±5℃，相对湿度为65±5%。

⑵热态试验或潮湿环境试验条件由产品标准参照录中表2予以规定。

击穿的判断：

试样沿施加电压方向及位置有贯穿小孔、开裂、烧焦等痕迹为击穿，如痕迹不清可用重复施加试验电压来判断。

电极和试样

金属电极应始终保持光滑、清洁和无缺陷。

注1：当对薄试样进行试验时，电极的维护格外重要。为了在击穿时尽量减小电极损伤，优先采用不锈钢电极。

接到电极上的导线即不应使得电极倾斜或其他移动或使得试样上压力变化，也不应使得试样周围的电场分布受到显著影响。

注2：试验非常薄的薄膜（例如：<μm厚)时,这些材料的产品标准应规定所用的电极、操作的具体程序和试样的制备方法。