The Glow Wire Test (GWT) is a critical flammability assessment method used to evaluate the fire resistance of materials and components in electrical and electronic equipment. By simulating thermal stress caused by overheated or faulty electrical parts, this test determines whether a material will ignite, sustain combustion, or propagate flames under controlled conditions. Compliance with glow wire test standards is mandatory for manufacturers across industries, including household appliances, automotive electronics, and medical devices, to ensure product safety and regulatory adherence.
The LISUN ZRS-3H Glow-wire Test Apparatus is a precision instrument designed to conduct these assessments in accordance with IEC 60695-2-10, IEC 60695-2-11, IEC 60695-2-12, IEC 60695-2-13, and other relevant standards. Its advanced thermal control and measurement capabilities make it indispensable for laboratories and quality assurance departments requiring reliable flammability data.
The test involves heating a standardized Nichrome wire to a specified temperature (typically between 550°C and 960°C) and applying it to a test specimen for a predetermined duration (typically 30 seconds). Key parameters evaluated include:
The LISUN ZRS-3H ensures repeatability through its PID-controlled heating system, which maintains temperature stability within ±2°C. Its automated test sequence minimizes human error, while integrated data logging facilitates compliance reporting.
Components such as switches, relays, and connectors must resist ignition when exposed to internal overheating. The ZRS-3H verifies compliance with IEC 60695 for products like circuit breakers and power supplies.
Toasters, coffee makers, and washing machines incorporate plastic housings that must not propagate flames. Testing at 750°C or 850°C ensures safety under fault conditions.
With increasing electrification, glow wire testing is applied to EV battery modules, infotainment systems, and wiring harnesses to meet ISO 20653 and LV 312 standards.
LED drivers and luminaire housings undergo testing to prevent fire risks from short circuits or thermal runaway.
Critical equipment, such as patient monitors and imaging systems, must avoid combustion even under electrical fault scenarios.
Cabin electronics and wiring systems are tested to stringent aerospace flammability requirements (e.g., FAA FAR 25.853).
The LISUN ZRS-3H supports all major standards, ensuring global compliance for manufacturers exporting to multiple regions.
A leading manufacturer of smart home devices used the ZRS-3H to assess the flammability of plastic enclosures for smart plugs. Testing at 750°C confirmed compliance with IEC 60695-2-12, preventing costly recalls and ensuring EU market access.
Q1: What is the difference between GWFI and GWIT?
A: The Glow Wire Flammability Index (GWFI) is the highest temperature at which a material does not ignite or self-extinguishes within 30 seconds. The Glow Wire Ignition Temperature (GWIT) is the lowest temperature causing ignition.
Q2: How often should the glow wire be replaced?
A: The Nichrome wire should be inspected before each test and replaced after visible degradation or inconsistent heating.
Q3: Can the ZRS-3H test non-metallic materials?
A: Yes, it evaluates plastics, insulation materials, and composites per IEC 60695.
Q4: What industries require glow wire testing?
A: Electrical components, automotive, aerospace, medical devices, and consumer electronics.
Q5: Does the ZRS-3H support custom test protocols?
A: Yes, its programmable interface allows user-defined temperature profiles and durations.
