基本介紹
- 中文名：灼熱絲試驗儀
- 溫度範圍：0～1100℃
- 溫控器：16A/D ±0.05%
- 溫度校準：960±15℃
產品介紹,試驗原理,技術參數,Glow Wire Tester,SPECIFICATIONS,
產品介紹
本裝置根據IEC60695-2-10：2000、GB/T5169.10-2006、GB/T5169.13-2006和GB4706.1標準中“灼熱絲試驗方法”的要求設計製造，適用於電工電子產品、家用電器及其材料進行著火危險試驗，模擬灼熱元件或過載電阻之類的熱源或點火源在短時間所造成的熱應力。
試驗原理
灼熱絲試驗儀是模擬在設備內部容易使火焰蔓延的絕緣材料或其他固體可燃材料的零件可能會由於灼熱絲或灼熱元件而起燃。在一定條件下，例如流過導線的故障電流、元件過載以及不良接觸的情況下，某些元件會達到某一溫度而使其附近的零件起燃試驗。
灼熱絲試驗儀的工作原理：將規定材質Φ4 mm的鎳鉻絲（U型灼熱絲頭）用大電流加熱至試驗規定溫度 ( 300 ℃ ～ 1000 ℃) 後，以規定壓力 (1.0N) 水平灼燙試品 30s ，試驗品和鋪墊物是否起燃或持燃時間來測定電工電子設備成品的著火危險性；試驗完成後記錄灼熱時間，起燃時間(Ti)，火焰熄滅時間(Te)，可燃性指數 (GWFI)。
灼熱絲頭：測量灼熱絲的溫度用標稱值徑為0.5mm的鎧裝細絲熱電偶，線材為鎳鉻和鎳鋁（K型）絲，適合在溫度高達960℃條件下連續運行，它們的焊接點位於鎧裝套內，用於測量灼熱絲溫度的熱電偶，其鎧裝套的金屬至少能耐1050℃的溫度。
校準灼熱絲溫度：
1. 將標準要求的銀箔（純度99.8%、厚 0.06mm、邊長 2mm 的正方形）放在灼熱絲頭的頂端中心位置。
2. 將灼熱絲頭加熱至適當值，直到銀箔熔化，此時溫度表所示值應為相關標準要求的960±15℃。
注意：測試灼熱絲溫度的熱電偶，其鎧裝套的金屬至少能耐1050度的溫度。建議採用進口熱電偶。
銀箔安裝位置示意圖
試樣安裝示意圖技術參數
計時裝置 | 9999X0.1S，進口儀表（奧托尼克斯） | 熱電偶 | NiCrφ0.5 鎧裝鎳鉻/鎳鋁絲,K分度，英國RS進口，對地絕緣 | |
灼熱絲頭 | 4mm Ni/Cr(80/20) | 溫度傳感延時 | 1.7S | |
小車速度 | 約13mm/S | 溫度範圍 | 0～1100℃ | |
試樣壓力 | 1±0.2N | 溫控器 | 16A/D ±0.05% | |
限壓深度 | 7mm | 溫度校準 | 960±15℃ | |
背景顏色 | 黑，體積：0.5立方 | 試樣離箱體 | >120mm | |
工作電源 | AC220V，50Hz，≤500W； | 外形尺寸 | 1100×550×1150）mm，≥0.5m3背景黑色 背景照度≤ 20Lux； | |
符合標準：IEC60695-2-10、GB5169、GB4706.1、IEC60335、IEC60598 | ||||
Glow Wire Tester
The device is designed to carry out fire hazard testing on electrotechnical products in accordance with the provisions of International standards.
The control unit is supplied with all the controls and metering necessary to accurately set the temperature of the glow wire. The wire current is continuously variable by means of the panel-mounted controller and is monitored by the built-in ammeter. A digital temperature indicator is fitted which, in conjunction with the thermocouple supplied, accurately measures the glow wire temperature. The electrical circuit of the control unit is fully protected by fuses and a miniature circuit breaker and incorporates mains on/off switching and push button control of the output current. Self contained cabinet with large viewing window and dark colored interior.
SPECIFICATIONS
::::::::::::::::::Basic introduction::::::::::::::::::
1.The device is designed to carry out fire hazard testing on electrotechnical products in accordance with the provisions of International standards.
2.The control unit is supplied with all the controls and metering necessary to accurately set the temperature of the glow wire. The wire current is continuously variable by means of the panel-mounted controller and is monitored by the built-in ammeter.
3.A digital temperature indicator is fitted which, in conjunction with the thermocouple supplied, accurately measures the glow wire temperature. The electrical circuit of the control unit is fully protected by fuses and a miniature circuit breaker and incorporates mains on/off switching and push button control of the output current. Self contained cabinet with large viewing window and dark colored interior.
::::::::::::Technical parameters::::::::::::
1, Glow wire temperature: 500 ~ 1000 °C± 2 °C continuous adjustable
2, Searing time: 0-999.9 s ± 0.1 s adjustable (usually selected for 30s)
3 Light-off time: 0-999.9 s ± 0.1 s, automatic recording, manual timeout
4, Fireouttime: 0-999.9 s ± 0.1 s, automatic recording, manual timeout
5.Glow Wire Element Ni/Cr wire, diameter: 4mm
6.Current Range: 0 to 200 A
7.Thermocouple: Type K (Ni/Cr - Ni/Al)
8.Thermocouple Size O/D: 0.5 mm
9.Temperature Resolution: 1C
10.Traverse Unit: Horizontal
11.Force: 1 N±0.2N
12.Maximum Travel : 14.5 cms
