高电压小电流试验仪/抗电弧测试仪
满足标准：GB/T 1411-2002《固体绝缘材料耐高压低电流电弧放电的试验》（等同IEC 61621-1997）及ASTM 495等标准的要求设计制造的，并符合IEC 149、UL 746A等试验方法高电压小电流试验仪/抗电弧测试仪 主要技术参数
1 电弧通断时间误差：小于 ?10ms
2 调压器容量：2kVA
3 额定试验电压：12.5kV
4 试验电压精度：?3%
5 电流控制精度：?10% 电流测量精度：1.5%
6 电极对试样压力：（0.5?0.05）N
7 电极材料：钨棒
8 电极距离：（6.35?0.1）mm（IEC）
（6.0?0.1）mm（ASTM）
9 使用环境温度：（23?2）℃
10 使用环境湿度：（50?5）%
11 电源：220V?5% 50Hz 10A
12 试验 方法： 国标/美标/10 mA 连续/20 mA 连续/30 mA连续/40 mA连续
13 试验程序如下：
程序段 | 电弧电流 mA | 电弧通断时间s | 各程序段持续时间s | 试验总时间s |
| | IEC 61621 | ASTM 495 | | |
1 | 10 | 1/8s通 7/8s断 | 1/4s通 7/4s断 | 60 | 60 |
2 | 10 | 1/4s通 3/4s断 | 1/4s通 3/4s断 | 60 | 120 |
3 | 10 | 1/4s通 1/4s断 | 1/4s通 1/4s断 | 60 | 180 |
4 | 10 | 连续通 | 60 | 240 |
5 | 20 | 连续通 | 60 | 300 |
6 | 30 | 连续通 | 60 | 360 |
7 | 40 | 连续通 | 60 | 420 |
功能特点1、本机为上下一体结构，下部为操作系统，上部为试验箱。
2、本产品采用PLC控制，提高抗干扰性能、电压、电流测量精度。
3、10寸触控屏操作界面，方便快捷，可通过选择程序（IEC或ASTM）自动进行试验，并数显各试验过程和结果。
4、计量方便。可选择任意时段程序进行计量，快捷高效。
5、试验过程中有步进控制稳压功能，不受电网电压波动影响。
6、控制界面上有合闸、零位、升压、降压、程序段等监控功能。
7、电压和电流的实时监控功能。
8、软件电流保护和电压保护功能，硬件电流保护和电压保护功能。
9、在触控屏界面有电压和电流的线性校正功能，可以任意修正，方便、快捷、高效。
配置
序号 | 名称 | 数量 | 备注 |
01 | 耐电弧测试仪 | 一台 | |
02 | 电极系统 | 一套 | |
03 | 电极支座 | 一套 | |
04 | 电源电缆 | 一套 | |
05 | 接地放电棒 | 一支 | |
06 | 电流毫安表 | 一台 | |
07 | 电脑测控软件 | 一套 | |
08 | 试样架 | 一支 | |
09 | 电极距离标准块 | 2块 | |
10 | 角度标准块 | 2块 | |
11 | 陶瓷片 | 2片 | |
12 | 喷墨打印机 | 1台 | 品牌 |
13 | 计算机 | 1台 | 品牌 |
14 | 使用说明书 | 1份 | |
15 | 合格证 | 1份 | |
结果8.1本试验的结果是以秒表示的失效时间。注：许多材料常常是在严酷程度发生变化后的开头几秒内失去抵抗能力的。当对材料的耐电弧作比较时，两者差异处于两个阶段交替的那几秒要比处于单个阶段内所经过的相同的那几秒时间重要的多。因此，耐电弧在178s与182s之间和耐电弧在174s与178s之间两者存在着很大的差异。8.2已经观察到的四种通常失效类型8.2.1由于许多无机电介质变成白热状态，致使它们变成能够导电。然而，当冷却时，它们又恢复到其原先绝缘状态。8.2.2某些有机复合物突然发生火焰，但在材料内不形成明显的导电通道。8.2.3另外一些材料可见到因漏电起痕而导致失效，即当电弧消失时，在电极间形成一条细金属丝似的线。8.2.4第四种类型是表面发生碳化直至出现足够的碳而形成导电。电极和电极装置4.2.1电极电极由直径2.4mm?0.05mm无裂纹、凹痕或粗糙疵点的钨棒制成。活动电极长至少20mm。推荐将这个活动电极固定于把柄上，使得在削尖后的电极能准确定位。该电极应经研磨抛光，以形成与轴线夹角为30??1?的平椭圆面。图2展示出固定于合适把柄上的电极的一个实例。注1：已发现钨焊条是适用于这种电极的。注2：在削尖过程中，采用钢制夹紧装置夹持电极，有助于保证将尖头电极加工成所要求的几何形状。4.2.2电极装置该装置提供了一种夹持电极和试样的方法，使得电弧按正确的角度施加于试样的上部表面。该装置应这样构成，使得每一个试样上部表面在每一次试验时都处在同一高度上。应调节每一电极，使得它以0.5N?0.05N的力无约束地静置于试样上。不应对试样进行抽风，只有当试验过程中试样释放出烟雾或气体时，才允许把这些燃烧产物排放掉。从略高于试样的平面位置，应提供观察电弧的清晰视域。注：对气流的要求，正在考虑之中。4.2.3清洗和削尖电极4.2.3.1清洗电极a）每一次试验后，应该用不起毛的实验室用的纸巾蘸以丙酮或乙醇之类溶剂清洗电极，再用去离子水擦洗电极，然后用干净的、干的不起毛的纸巾将其擦干。 
Designed and manufactured in accordance with standards such as GB/T 1411-2002 "Solid Insulation Materials - Test for Resistance to High and Low Voltage Current Arc Discharge" (equivalent to IEC 61621-1997) and ASTM 495, and in compliance with test methods such as IEC 149 and UL 746A
Main technical parameters
1. Error in arc on-off time: less than ? 10ms
2 regulator capacity: 2kVA
3. Rated test voltage: 12.5kV
Test voltage accuracy: ? 3%
5 Current control accuracy: ? 10% Current measurement accuracy: 1.5%
6 electrode to sample pressure: (0.5 ? 0.05) N
7 electrode material: tungsten rod
8-electrode distance: (6.35 ? 0.1) mm (IEC)
（6.0?0.1）mm（ASTM）
9. Operating environment temperature: (23 ? 2) ℃
10. Environmental humidity for use: (50 ? 5)%
11 Power supply: 220V ? 5% 50Hz 10A
12 Test methods: National standard/American standard/10 mA continuous/20 mA continuous/30 mA continuous/40 mA continuous
The experimental procedure is as follows:
Program segment arc current
MA arc on-off time s duration of each program segment s total test time s
IEC 61621ASTM 495
1 10 1/8s on 7/8s off 1/4s on 7/4s off 60 60
2 10 1/4s on 3/4s off 1/4s on 3/4s off 60 120
3 10 1/4s on 1/4s off 1/4s on 1/4s off 60 180
4 10 continuous 60 240
5 20 continuous pass 60 300
6 30 continuous 60 360
7 40 continuous pass 60 420
Functional Features
1. This machine has an integrated upper and lower structure, with the lower part being the operating system and the upper part being the test chamber.
2. This product adopts PLC control to improve anti-interference performance, voltage and current measurement accuracy.
3. 10 inch touch screen operation interface, convenient and fast, can automatically perform tests by selecting programs (IEC or ASTM), and display the test process and results in digital format.
4. Convenient measurement. You can choose any time period program for measurement, which is fast and efficient.
5. During the experiment, there is a step control voltage stabilization function that is not affected by fluctuations in the power grid voltage.
6. The control interface has monitoring functions such as closing, zero position, boost, buck, program segment, etc.
7. Real time monitoring function for voltage and current.
8. Software current protection and voltage protection functions, hardware current protection and voltage protection functions.
9. There is a linear correction function for voltage and current on the touch screen interface, which can be adjusted freely, conveniently, quickly, and efficiently.
configuration
Number, Name, Quantity, Remarks
One 01 arc resistance tester
One set of 02 electrode system
03 electrode support set
One set of 04 power cables
One 05 grounding discharge rod
One 06 milliampere meter
A set of 07 computer measurement and control software
One sample rack for 08
09 electrode distance standard block 2 pieces
2 standard blocks at 10 angles
11 ceramic pieces, 2 pieces
12 inkjet printers, 1 brand
13 computers, 1 brand
14 User Manual 1 copy
15 certificates of conformity, 1 copy
result
The results of this experiment are expressed in seconds as the failure time.
Note: Many materials often lose their resistance in the first few seconds after a change in severity. When comparing the arc resistance of materials, the difference between the two is much more important in the few seconds that alternate between two stages than in the same few seconds that pass through a single stage. Therefore, there is a significant difference in arc resistance between 178s and 182s and between 174s and 178s.
8.2 Four commonly observed failure types
8.2.1 Due to many inorganic media becoming white hot, they become conductive. However, when cooled, they return to their original insulating state.
8.2.2 Some organic complexes suddenly ignite, but no obvious conductive channels are formed within the material.
8.2.3 In addition, some materials may experience failure due to trace caused by leakage, that is, when the arc disappears, a thin metal wire like line is formed between the electrodes.
The fourth type is surface carbonization until sufficient carbon is present to form conductivity.
Electrodes and electrode devices
4.2.1 Electrode
The electrode is made of tungsten rod with a diameter of 2.4mm ? 0.05mm and no cracks, dents or rough defects. The length of the active electrode should be at least 20mm. It is recommended to fix this activity electrode on the handle so that the sharpened electrode can be accurately positioned. The electrode should be ground and polished to form a flat elliptical surface with an angle of 30 ?? 1 ? with the axis. Figure 2 shows an example of an electrode fixed on a suitable handle.
Note 1: It has been found that tungsten welding rods are suitable for this type of electrode.
Note 2: During the sharpening process, using a steel clamping device to hold the electrode helps ensure that the pointed electrode is machined into the required geometric shape.
4.2.2 Electrode device
This device provides a method of clamping electrodes and samples, allowing the arc to be applied to the upper surface of the sample at the correct angle. The device should be constructed in such a way that the upper surface of each specimen is at the same height during each test. Each electrode should be adjusted so that it rests unconstrained on the specimen with a force of 0.5N ? 0.05N. The sample should not be ventilated, and only when smoke or gas is released from the sample during the testing process, are these combustion products allowed to be discharged.
A clear field of view for observing the arc should be provided from a plane slightly above the specimen.
Note: The requirements for airflow are currently under consideration.
4.2.3 Cleaning and sharpening electrodes
4.2.3.1 Cleaning electrodes
a) After each experiment, the electrode should be cleaned with a lint free laboratory tissue dipped in solvents such as acetone or ethanol, then rinsed with deionized water, and finally wiped dry with a clean, dry lint free tissue.
