灼热丝试验仪

用于灼热丝试验的设备

灼热丝试验仪是用于灼热丝试验的设备。

技术参数

产品介绍

本装置根据IEC60695-2-10：2000、GB/T5169.10-2006、GB/T5169.13-2006和GB4706.1标准中“灼热丝试验方法”的要求设计制造，适用于电工电子产品、家用电器及其材料进行着火危险试验，模拟灼热元件或过载电阻之类的热源或点火源在短时间所造成的热应力。

试验原理

灼热丝试验仪是模拟在设备内部容易使火焰蔓延的绝缘材料或其他固体可燃材料的零件可能会由于灼热丝或灼热元件而起燃。在一定条件下，例如流过导线的故障电流、元件过载以及不良接触的情况下，某些元件会达到某一温度而使其附近的零件起燃试验。

灼热丝试验仪的工作原理：将规定材质Φ4 mm的镍铬丝（U型灼热丝头）用大电流加热至试验规定温度 ( 300 ℃ ～ 1000 ℃) 后，以规定压力 (1.0N) 水平灼烫试品 30s ，试验品和铺垫物是否起燃或持燃时间来测定电工电子设备成品的着火危险性；试验完成后记录灼热时间，起燃时间(Ti)，火焰熄灭时间(Te)，可燃性指数 (GWFI)。

灼热丝头：测量灼热丝的温度用标称值径为0.5mm的铠装细丝热电偶，线材为镍铬和镍铝（K型）丝，适合在温度高达960℃条件下连续运行，它们的焊接点位于铠装套内，用于测量灼热丝温度的热电偶，其铠装套的金属至少能耐1050℃的温度。

校准灼热丝温度：

1. 将标准要求的银箔（纯度99.8%、厚 0.06mm、边长 2mm 的正方形）放在灼热丝头的顶端中心位置。

2. 将灼热丝头加热至适当值，直到银箔熔化，此时温度表所示值应为相关标准要求的960±15℃。

注意：测试灼热丝温度的热电偶，其铠装套的金属至少能耐1050度的温度。建议采用进口热电偶。

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