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100KV绝缘介电强度试验仪

100KV绝缘介电强度试验仪

价格:38450元浏览:125次联系:刘元元 / 15132636097 / 企业:北京北广精仪仪器设备有限公司留言店铺收藏

100KV绝缘介电强度试验仪  气体电介质击穿

在电场作用下气体分子发生碰撞电离而导致电极间的贯穿性放电.其影响因素很多,主要有作用电压,电板形状,气体的性质及状态等.气体介质击穿常见的有直流电压击穿,工频电压击穿,高气压电击穿,冲击电压击穿,高真空电击穿,负电性气体击穿等.空气是很好的气体绝缘材料,电离场强和击穿场强高,击穿后能迅速恢复绝缘性能,且不燃,不爆,不老化,无腐蚀性,因而得到广泛应用.为提供高电压输电线或变电所的空气间隙距离的设计依据(高压输电线应离地面多高等),需进行长空气间隙的工频击穿试验.

100KV绝缘介电强度试验仪  主要配置:

1、试验主机一台              5万伏高压发生器一台

2、电磁自动放电装置一套。     电压击穿计算机测控软件一套

3、全自动微电脑电压调压装置一套(串口方式)

4、试验电极规格(紫铜)         计算机一套(专用抗强干扰计算机)

5、试验用油盒一只:材质为有机玻璃     国家一级计量鉴定质检份

6、产品使用说明书一份            合格证一份

介电系数,是一个在电的位移和电场强度之间存在的比例常量。这一个常量在自由的空间(一个真空)中是8.85?10的-12次方法拉第/米(F/m)。在其它的材料中,介电系数可能差别很大,经常远大于真空中的数值,其符号是eo。 在工程应用中,介电系数时常在以相对介电系数的形式被表达,而不是绝对值。如果eo表现自由空间(是,8.85?10的-12次方F/m)的介电系数,而且e是在材料中的介电系数,则这个材料的相对介电系数(也叫介电常数)由下式给出: ε1=ε/εo=ε?1.13?10的11次方 很多不同的物质的介电常数超过1。这些物质通常被称为绝缘体材料,或是绝缘体。普遍使用的绝缘体包括玻璃,纸,云母,各种不同的陶瓷,聚乙烯和特定的金属氧化物。绝缘体被用于交流电(AC),声音电波(AF)和无线电电波(射频)的电容器和输电线路。

Product features:

1. Using intelligent integrated circuits for constant speed boosting.

2. Support short circuit test requirements in a short period of time.

3. Voltage test accuracy:≤1%.

4. Test voltage continuously adjustable: 0-50KV.

5. The current can be collected up to mA level.

6. Provide a national first level measurement unit calibration and verification certificate or a certificate of the customer's designated measurement unit.

7. Power supply: 220V?10% single-phase AC voltage and 50Hz?1% frequency.

8. Current and voltage stability: When the external power supply voltage fluctuates by 10%

Dielectric strength is a measure of the electrical strength of a material as an insulator It is defined as the maximum voltage per unit thickness that a sample can withstand when it is broken down, expressed in volts per unit thickness The higher the dielectric strength of a substance, the better its quality as an insulator

Dielectric strength is a measure of a material's ability to withstand high voltage without generating dielectric breakdown. The sample is placed between electrodes and the applied voltage is increased through a series of steps until dielectric breakdown occurs, in order to measure the dielectric strength. Although the results obtained are in kV/mm units, it does not indicate that they are independent of the thickness of the sample. Therefore, comparability of data for various materials can only be obtained under the condition of the same sample thickness.

Insulation dielectric strength test and insulation resistance test

The insulation dielectric strength test is the application of a specified voltage within a specified time period between insulated components or between insulated components and ground, in order to determine whether the motor can operate safely at rated voltage and whether it can withstand overvoltage caused by switches, surges, and other similar phenomena, and to evaluate whether the insulation material or insulation gap of the motor is suitable. If the motor has defects, breakdown discharge or damage may occur after applying the test voltage. The breakdown discharge is manifested as flashover (surface discharge), spark discharge (air discharge), or breakdown (breakdown discharge) phenomenon. Excessive leakage current may cause changes in electrical parameters or physical properties.

产品特点:

1、采用智能集成电路进行匀速升压。

2、支持短时间内短路试验要求。

3、电压试验精度: ≤1%。

4、试验电压连续可调:0--50KV。

5、电流可采集到mA级。

6、出具国家一级计量单位校准检定证书或出具客户指定计量单位的证书。

7、电源:220V?10%的单相交流电压和50Hz?1%的频率。

8、电流电压稳定度:外界电源电压波动10%时

介电强度是一种材料作为绝缘体时的电强度的量度.它定义为试样被击穿时,单位厚度承受的最大电压,表示为伏特每单位厚度.物质的介电强度越大,它作为绝缘体的质量越好.

介电强度,是材料抗高电压而不产生介电击穿能力的量度,将试样放置在电极之间,并通过一系列的步骤升高所施加的电压直到发生介电击穿,以次测量介电强度。尽管所得的结果是以kv/mm为单位的,但并不表明与试样的厚度无关。因此,只有在试样厚度相同的条件下得到各种材料的数据才有可比性。

绝缘介电强度试验与绝缘电阻测试

绝缘介电强度试验是在相互绝缘的部件之间或绝缘的部件与地之间,在规定时间内施加规定的电压,以此来确定电机在额定电压下能否安全工作,能否耐受由于开关、浪涌及其它类似现象所导致的过电压的能力,从而评定电机绝缘材料或绝缘间隙是否合适。如果电机有缺陷,则在施加试验电压后,会产生击穿放电或损坏。击穿放电表现为飞弧(表面放电)、火花放电(空气放电)或击穿(击穿放电)现象。过大的漏电流可能引起电参数或物理性能的改变 。

软件功能:

01、软件平台:WINDOWS窗口操作平台,界面直观,便于操作

02、曲线显示:在实验过程中可以动态显示试验曲线

03、数据导出:可以对试验结果导入EXCEL表格

04、实验报告:可以人为设置报告名称,并对实验报告进行打印

05、试验方式:可以根据需求对直流试验和交流试验进行灵活选择

06、试验方法:可以根据需求自行选择击穿电压、耐压试验、梯度试验

07、参数设置:可以根据不同的试验方式及试验方法灵活设置所需的不同参数值

08、试样设置:可对不同标准的试样参数灵活设置

09、人员管理:设置用户名及密码,不同的操作员登入进行不同的试验,互不影响

10、标准选择:含有不同标准,可根据需求自行选择

11、连续操作:连续操作试验时,可直接在软件里结束试验,进行二次试验

Software features:

01. Software platform: Windows window operation platform, intuitive interface, easy to operate

02. Curve display: During the experiment, the test curve can be dynamically displayed

03. Data export: It is possible to import experimental results into an Excel spreadsheet

04. Experimental report: The report name can be manually set and the experimental report can be printed

05. Test method: Flexible selection of DC and AC tests can be made according to requirements

06. Test method: You can choose breakdown voltage, withstand voltage test, and gradient test according to your needs

07. Parameter setting: Different parameter values can be flexibly set according to different testing methods and methods

08. Sample setting: Flexible setting of sample parameters for different standards

09. Personnel management: Set username and password, different operators log in for different experiments, without affecting each other

10. Standard selection: Contains different standards, can be selected according to needs

11. Continuous operation: During the continuous operation test, the test can be directly ended in the software and a second test can be conducted

绝缘介电强度试验与绝缘电阻测试是不能等同的。清洁、干燥的绝缘体尽管具有高的绝缘电阻,但却可能发生不能经受绝缘介电强度试验的故障;反之,一个脏的、损伤的绝缘体,其绝缘电阻虽然低,但在高电压下也可能不会被击穿。由于绝缘部件是由不同材料制成或是由不同材料合成的,它们的绝缘电阻各不相同。因此,绝缘电阻的测试不能完全代表对清洁度或无损伤程度的直接量度。但是,这种测试对确定高温、潮湿、污物、氧化或挥发性材料等对绝缘特性影响程度是极为有益的 。

事实上,一台由于过热而使绝缘材料已经老化变脆的电机,其绝缘电阻仍可高达100MΩ,但却无法通过绝缘介电强度试验。绝缘电阻测试对绝缘材料受潮特别敏感,对绝缘材料老化则显得力不从心。

绝缘介电强度试验一般采用50Hz正弦波交流电,而绝缘电阻测试均采用直流电。

整机组成:

升压部件:由调压器和高压变压器组成0~50KV的升压部分。动部件:由步进电机均匀调节调压器使加给高压变压器的电压变化。检测部件:由集成电路组成的测量电路。通过信号线把检测的模拟信号和开关信号传给计算机。计算机软件:通过智能电路把由检测设备采集的测控信号传给计算机。计算机根据采集的信息控制设备运行并处理试验结果。试验电极:根据国家标准(1408.1-2006)随设备提供三个电极,具体规格为:Ф25mm?25mm两个;Ф75mm?25mm一个。(订做除外)

Overall composition:

Boosting component: The boosting part of 0-50KV is composed of a voltage regulator and a high-voltage transformer. Moving parts: The voltage regulator is uniformly adjusted by a stepper motor to change the voltage applied to the high-voltage transformer. Detection component: a measurement circuit composed of integrated circuits. Send the detected analog signals and switch signals to the computer through signal lines. 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 based on the collected information and processes the test results. Test electrodes: According to the national standard (1408.1-2006), three electrodes are provided with the equipment, with specific specifications as follows:ФTwo 25mm x 25mm;ФOne 75mm x 25mm. (Excluding customization)

控制方式:计算机控制

产品型号:BDJC系列

符合国标:GB/T1408-2006、ASTM D149

适用材料:固体绝缘材料

功   率:10KVA

最大电压:100KV

试验方式:直流/交流:击穿、耐压、阶梯

显示方式:曲线/数据显示,数据打印。

试验空间:绝缘油/空气

升压速率:10V/S-10KV/S

整机精度:≤2%

满足标准:

仪器依据以下标准中对击穿电压部分的要求制造

GB/T 1408-2006绝缘材料电气强度试验方法

GB/T1695-2005硫化橡胶工频电压击穿强度和耐电压强度试验

GB/T3333电缆纸工频电压击穿试验方法

HG/T 3330绝缘漆漆膜击穿强度测定法

GB12656电容器纸工频电压击穿试验方法

ASTM D149固体电绝缘材料在工业电源频率下的介电击穿电压和介电强度的试验方法.

击穿场强

在发生击穿时的电场强度依赖于电介质(绝缘体)的各自的几何形状和与该电场被施加在电极上,以及在其中所述增加速率电场被施加。由于电介质材料通常含有微小的缺陷,实际的电介质强度将是理想的无缺陷材料的固有电介质强度的一部分。与相同材料的较厚的样品相比,介电膜倾向于表现出更高的介电强度。例如,几百纳米至几微米厚的二氧化硅膜的介电强度大约为0.5GV / m。然而非常薄的层(下面,比方说,100纳米)成为由于部分导电电子隧穿。在需要最大的实际介电强度的地方,例如高压电容器和脉冲变压器,使用多层薄介电膜。由于气体的绝缘强度取决于电极的形状和结构而变化,通常以氮气的介电强度的一部分来测量。

Test preparation and environment:

1. Sample treatment

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

⑵Pre processing and conditional processing: The processing conditions and methods can be selected from Appendix Tables 1 and 2 of this standard based on the performance requirements of the product. Special requirements can be specified separately by the product standard.

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 no less than 24 hours at 23?2℃and a relative humidity of (50?5)%.

Before the test, the sample that has been dampened or immersed in liquid medium should be gently sucked off with filter paper to remove the liquid droplets. The time from the sample to the completion of the test should not exceed 5 minutes.

2. Media:

⑴Gas medium: Air is used. If there is a flashover, a soft silicone rubber anti arc ring can be added around the electrode. There is a circular gap of about one millimeter between the anti flying arc ring and the electrode, with a ring width of 30mm.

⑵Liquid medium: Clean transformer oil is used for normal tests and hot tests below 90℃, and clean overheated cylinder oil is used for hot tests between 90℃and 300℃.

3. Test environment:

⑴Normal test environment:

The temperature is 20?5℃and the relative humidity is 65?5%.

The conditions for hot or humid environment testing shall be specified in Table 2 of the product standard reference record.

Determination of breakdown:

The presence of small holes, cracks, and burnt marks along the direction and position of the applied voltage on the sample indicates breakdown. If the marks are unclear, repeated application of the test voltage can be used to determine.

试验准备和环境:

1.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。

⒉ 媒质:

⑴气体媒质:采用空气,如有闪络可在电极周围加柔软硅橡胶防飞弧圈。防飞弧圈与电极之间有一毫米左右的环状间隙,环宽30mm。

⑵液体媒质:常态试验及90℃以下的热态试验采用清洁的变压器油,90℃至300℃以内的热态试验采用清洁的过热气缸油。

⒊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。

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