高電壓小電流試驗儀/抗電弧測試儀

 滿足標準：GB/T 1411-2002《固體絕緣材料耐高壓低電流電弧放電的試驗》（等同IEC  61621-1997）及ASTM 495等標準的要求設計制造的，并符合IEC 149、UL 746A等試驗方法

高電壓小電流試驗儀/抗電弧測試儀  主要技術參數

1 電弧通斷時間誤差：小于 ?10ms

2 調壓器容量：2kVA

3 額定試驗電壓：12.5kV

4 試驗電壓精度：?3%

5 電流控制精度：?10%  電流測量精度：1.5%

6 電極對試樣壓力：（0.5?0.05）N

7 電極材料：鎢棒

8 電極距離：（6.35?0.1）mm（IEC）

               （6.0?0.1）mm（ASTM）

9 使用環境溫度：（23?2）℃

10 使用環境濕度：（50?5）%

11 電源：220V?5%  50Hz  10A

12 試驗    方法：   國標/美標/10 mA 連續/20 mA 連續/30 mA連續/40 mA連續

13 試驗程序如下：

程序段	電弧電流 mA	電弧通斷時間s		各程序段持續時間s	試驗總時間s
		IEC 61621	ASTM 495
1	10	1/8s通 7/8s斷	1/4s通 7/4s斷	60	60
2	10	1/4s通 3/4s斷	1/4s通 3/4s斷	60	120
3	10	1/4s通 1/4s斷	1/4s通 1/4s斷	60	180
4	10	連續通		60	240
5	20	連續通		60	300
6	30	連續通		60	360
7	40	連續通		60	420

功能特點

1、本機為上下一體結構，下部為操作系統，上部為試驗箱。

2、本產品采用PLC控制，提高抗干擾性能、電壓、電流測量精度。

3、10寸觸控屏操作界面，方便快捷，可通過選擇程序（IEC或ASTM）自動進行試驗，并數顯各試驗過程和結果。

4、計量方便。可選擇任意時段程序進行計量，快捷高效。

5、試驗過程中有步進控制穩壓功能，不受電網電壓波動影響。

6、控制界面上有合閘、零位、升壓、降壓、程序段等監控功能。

7、電壓和電流的實時監控功能。

8、軟件電流保護和電壓保護功能，硬件電流保護和電壓保護功能。

9、在觸控屏界面有電壓和電流的線性校正功能，可以任意修正，方便、快捷、高效。

 配置

序號	名稱	數量	備注
01	耐電弧測試儀	一臺
02	電極系統	一套
03	電極支座	一套
04	電源電纜	一套
05	接地放電棒	一支
06	電流毫安表	一臺
07	電腦測控軟件	一套
08	試樣架	一支
09	電極距離標準塊	2塊
10	角度標準塊	2塊
11	陶瓷片	2片
12	噴墨打印機	1臺	品牌
13	計算機	1臺	品牌
14	使用說明書	1份
15	合格證	1份

結果8.1本試驗的結果是以秒表示的失效時間。注：許多材料常常是在嚴酷程度發生變化后的開頭幾秒內失去抵抗能力的。當對材料的耐電弧作比較時，兩者差異處于兩個階段交替的那幾秒要比處于單個階段內所經過的相同的那幾秒時間重要的多。因此，耐電弧在178s與182s之間和耐電弧在174s與178s之間兩者存在著很大的差異。8.2已經觀察到的四種通常失效類型8.2.1由于許多無機電介質變成白熱狀態，致使它們變成能夠導電。然而，當冷卻時，它們又恢復到其原先絕緣狀態。8.2.2某些有機復合物突然發生火焰，但在材料內不形成明顯的導電通道。8.2.3另外一些材料可見到因漏電起痕而導致失效，即當電弧消失時，在電極間形成一條細金屬絲似的線。8.2.4第四種類型是表面發生碳化直至出現足夠的碳而形成導電。電極和電極裝置4.2.1電極電極由直徑2.4mm?0.05mm無裂紋、凹痕或粗糙疵點的鎢棒制成。活動電極長至少20mm。推薦將這個活動電極固定于把柄上，使得在削尖后的電極能準確定位。該電極應經研磨拋光，以形成與軸線夾角為30??1?的平橢圓面。圖2展示出固定于合適把柄上的電極的一個實例。注1：已發現鎢焊條是適用于這種電極的。注2：在削尖過程中，采用鋼制夾緊裝置夾持電極，有助于保證將尖頭電極加工成所要求的幾何形狀。4.2.2電極裝置該裝置提供了一種夾持電極和試樣的方法，使得電弧按正確的角度施加于試樣的上部表面。該裝置應這樣構成，使得每一個試樣上部表面在每一次試驗時都處在同一高度上。應調節每一電極，使得它以0.5N?0.05N的力無約束地靜置于試樣上。不應對試樣進行抽風，只有當試驗過程中試樣釋放出煙霧或氣體時，才允許把這些燃燒產物排放掉。從略高于試樣的平面位置，應提供觀察電弧的清晰視域。注：對氣流的要求，正在考慮之中。4.2.3清洗和削尖電極4.2.3.1清洗電極a）每一次試驗后，應該用不起毛的實驗室用的紙巾蘸以丙酮或乙醇之類溶劑清洗電極，再用去離子水擦洗電極，然后用干凈的、干的不起毛的紙巾將其擦干。

 

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.