The SCR ELEKTRONIKS Hot Wire Ignition Tester is used for testing Ignition of Materials by Hot Wire Sources as per ASTM D 3874.
As suggested by the standard, Hot Wire Ignition Tester (Heated Wire Tester) is designed as per IEC 60947-1 and ASTM D 3874 to evaluate a material’s ability to resist ignition when exposed to abnormally high temperatures resulting from a component failure such as a conductor carrying far more than its rated current
The SCR ELEKTRONIKS Hot Wire Ignition Tester has a micro-controller based dedicated logic unit to conduct this test. It’s built in extruded aluminium chassis with all material carefully chosen for durability & dependability. It’s used by leading test labs world-wide.
As per the standard, the center position of the specimen is wrapped with a Nichrome wire in a specific way as per clause 10.1 of ASTM D 3874 & clause No. 8.2.1.1.2 of IEC 60947-1. The free ends of the wire is connected to a circuit which supplies current. Next the circuit is energized such that it dissipates 0.26 W/mm. When the ignition occurs or after 120 seconds (whichever is earlier), the circuit is switched off and the time to ignition is noted. If the material under test melts, then the circuit is switched off when the material is no longer in touch with the 5 turns of the heated wire. In such case the time to melt is noted.
UL 746A refers to ASTM 3874 – 88 for this hot wire ignition test. As per UL 746 A, for a given material, the Hot Wire Ignition Performance Level Category (PLC) is to be assigned based on the determined mean time for ignition (IT). Please refer to table 31.1 of UL 746A.
Like-wise for all other standards such as IEC 60947 – 1 and IEC 60695 – 2 – 20 (Fire hazard testing – Part 2: Glowing / Hot wire based test methods – Section 20: Hot-wire coil ignitability test on materials) the testing method is same.
Needle Flame Test Apparatus is the commonly used equipment for testing solid insulating materials. This test apparatus is covered in IEC 60695-11-5
Dry Arc Resistance Tester is made to test the electrical insulating material by exposing it to Arcing under high voltage as per ASTM D 495
The tester can be customized with respect to PC based or otherwise, but is generally procured with the manual option (without PC)
The tester is used to test flame susceptibility when a current is passed through a hot wire wrapped around the specimen.
The SCR ELEKTRONIKS Heated wire test apparatus has a micro-controller based dedicated logic unit to conduct this test. It’s built in extruded aluminium chassis with all material carefully chosen for durability & dependability. It’s used by leading test labs world-wide.
