What is the glow wire test for plug, socket outlets and coupler for industrial purpose?
According to IEC 60309-1 calsue 27, external parts of insulating material and insulating parts supporting live parts of accessories shall be resistant to abnormal heat and to fire.
Compliance is checked by the glow wire test chamber given in IEC 60695-2-1 with the following specifications.
The temperature of the tip of the glow-wire is:
(650 ± 10) °C for parts of insulating material not necessary to retain current-carrying parts and parts of the earthing circuits in position, even though they are in contact with them.
(850 ± 15) °C for parts of insulating material necessary to retain current-carrying parts and parts of the earthing circuits in position.
The accessories are considered to have withstood the glow wire test if:
– there is no visible flame and no sustained glowing.
– flame or glowing of the specimen or of the surroundings extinguish within 30 s after the removal of the glow-wire, and the surrounding parts have not burned away completely. There shall be no permanent ignition of the tissue paper.
Zhilitong Electromechanical Co., ltd manufactures glow wire test chamber ZLT-GTR, which conform to above requirements of IEC 60309 standard.