高壓漏電起痕試驗機-6000V summary:
Under the influence of humidity and impurities in electrical products, insulation leakage may occur between charged parts of different polarities or between charged parts and grounded metals, resulting in electric arcs that can cause breakdown and short circuits in electrical appliances or material erosion due to discharge, and even ignite and cause fires. Leakage tracing test is a destructive test conducted on insulation materials to simulate the above situation. It is used to measure and evaluate the relative resistance of insulation materials to leakage tracing under the action of electric field and impurity water at a specified voltage. It is suitable for solid electrical insulation materials and products of electrical and electronic products, household appliances, such as relay sockets, transfer switch covers, contactors, etc.
高壓漏電起痕試驗機-6000V 概述:
在電器產品受潮濕和雜質環境的影響下,不同極性帶電部件之間或帶電部件與接地金屬之間可能會引起絕緣上的漏電,產生的電弧對電器造成擊穿短路或由于放電使材料電蝕損,甚至起燃導致火災。漏電起痕試驗就是模擬上述情況對絕緣材料進行的一種破壞性試驗,用以測量和評定在規定電壓下,絕緣體在電場和含雜質水的作用時的相對耐漏電起痕性,適用于電工電子產品、家用電器的固體電器絕緣材料及其產品,如:繼電器插座、轉換開關蓋、接觸器等……。
performance index
1. Electrode: 0.5mm thick Material: Stainless steel;
2. Distance between upper and lower electrodes: 50.0mm?0.1;
3. Test voltage: adjustable from 100V to 6000V;
4. Voltage regulator: Output: adjustable from 0 to 250V, capacity 5KVA;
5. Test Transformer: Capacity 5KVA, maximum output voltage AC6000V (or DC6000V optional);
6. High precision voltage regulator: output AC220V power 6000W, accuracy?1%;
7. When the circuit current is 60mA, cut off the voltage output;
8. Test time: 6 hours;
9. Dropping accuracy: 0.5%;
10. Voltage stability:?1%;
11. Trace detection: According to the standard GB/T653-2003/4.1.2, apply voltage (2.5kV, 3.5kV, and 4.5kV) to the sample and drip the contaminated liquid at a certain flow rate. If the current is below 60mA for 6 hours without current leakage, it is considered to have passed through;
12. Dropping device:
Using a Leifu precision peristaltic pump, the flow range is 0.00185 to 20 milliliters per minute, the working speed is 0.1 to 50 revolutions per minute, and the flow accuracy error is:< 0.5%;
13. Output voltage: AC/DC (switchable)
14. Number of experimental groups: Five groups
15. Control device: using Siemens PLC Taiwan Weilun touch screen control, precise control, simple operation, fully humanized design, test results
The beam automatically generates reports, and the panel thermal printer can print test results in a timely manner;
15. Dimensions (mm): 710 (width)?365 (depth)?760 (height) Box volume: 0.1m3
16. Chassis: Made of SUS304 stainless steel (brushed surface);
17. The sewage tank is made of 316 stainless steel and equipped with a sealing device.
The time constant of the drip device can be adjusted to achieve precise control of the drip volume and drip time interval.
Configuration: It is recommended to choose an electronic weighing device
特點:
試驗儀由試驗部分和控制部分組成采用一體化設計,方便現場安裝和調試。試驗箱外殼及結構件采用S304不銹鋼或黃銅制造;電極頭為不銹鋼,耐高溫耐腐蝕;滴液計數準確,控制系統穩定可靠。
高電壓起痕試驗機(含高電壓發生器)
依據標準:GB/T6553-2003
characteristic:
The testing instrument consists of an experimental part and a control part, designed in an integrated manner for easy on-site installation and debugging. The outer shell and structural components of the test chamber are made of S304 stainless steel or brass; The electrode head is made of stainless steel, which is resistant to high temperature and corrosion; Accurate droplet counting and stable and reliable control system.
High voltage trace testing machine (including high voltage generator)
According to the standard: GB/T6553-2003
高壓漏電起痕測試中交直流電壓的切換需要結合測試目的、設備能力及標準要求進行綜合調整。
以下是北廣精儀儀器設備有限公司的具體步驟和注意事項:
1.理解測試背景與目的
高壓漏電起痕漏電起痕(GBT6553-2024)(Tracking):指絕緣材料在電場和污染物(如濕氣、導電塵埃)共同作用下,表面逐漸形成碳化導電通路的現象。測試目的是評估材料在高壓下的絕緣耐久性。
交/直流差異:
交流(AC):電壓周期性變化,導致材料表面放電更頻繁,易產生局部電弧。
直流(DC):電壓方向恒定,可能加速離子遷移,形成穩定漏電路徑。
2.切換交直流電壓的關鍵步驟
(1)設備配置
測試設備要求:需具備交直流輸出功能的高壓電源(如可編程高壓發生器),并配備漏電流監測模塊。
電路切換:
手動切換:通過物理開關選擇AC或DC輸出(需斷電操作)。
自動切換:使用可編程電源,通過軟件控制輸出模式(需確保設備支持無縫切換)。
(2)參數調整
電壓等效性:需根據標準調整電壓等級。例如:
IEC 60112標準(交流測試):通常使用100~600V AC。
直流等效測試:若標準未明確,需通過實驗確定等效直流電壓(可能需提高至1.2~1.4倍交流有效值)。
電流限制:設置過流保護閾值,防止材料擊穿。
3)測試條件適配
-環境控制:保持溫濕度恒定(如23℃/50% RH),避免干擾。
-污染物施加:按標準使用電解液(如NH?Cl溶液),確保交/直流測試條件一致。
3.遵循測試標準
-常見標準:
IEC 60112:規定交流電壓下的相對漏電起痕指數(CTI)測試。
ASTM D3638:可能涉及直流測試(需查閱具體版本)。
標準選擇:若需對比材料在交直流下的性能,需制定等效測試方案(如相同能量等級)。
4.安全與操作注意事項
安全防護:
-測試前確保設備接地,穿戴絕緣裝備。
-直流測試時需注意殘余電荷釋放(使用放電棒)。
數據記錄:
-記錄電壓類型、失效時間、漏電流曲線等關鍵參數。
-對比交直流下起痕路徑形態差異(如直流可能更易形成線性碳化通道)。
5. 實際應用案例
場景1:研發新材料
需分別在交直流下測試,分析材料抗起痕性能的極化效應。
-場景2:認證測試
根據產品應用環境選擇電壓類型(如直流設備優先DC測試)。
-常見問題解答
- Q:交直流電壓能否直接等值替換?
A:不能。需考慮有效值、材料響應差異,建議通過預實驗確定等效電壓。
-Q:切換時是否需更改電極配置?
A:通常無需更改,但需清潔電極以避免交/直流殘留影響。
通過以上步驟,可實現高壓漏電起痕測試中交直流電壓的安全、準確切換,確保測試結果的有效性和可比性。實際操作中需嚴格遵循設備手冊及標準規范。
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