The UL 94 flammability standard is a critical benchmark for evaluating the fire resistance of plastic materials used in electrical and electronic equipment. Among its various test methods, the Uji Kawat Cahaya (GWT) is particularly significant for assessing a material’s ability to resist ignition and flame propagation when exposed to high-temperature heat sources.

The test simulates conditions where electrical components may overheat due to faulty connections, short circuits, or resistive heating. Compliance with UL 94 GWT ensures that materials used in high-risk applications—such as automotive electronics, household appliances, and industrial control systems—meet stringent safety requirements.

The Glow Wire Test involves applying a heated wire (typically made of nickel-chromium alloy) to a test specimen under controlled conditions. The wire is heated to a specified temperature (ranging from 550°C to 960°C), and the material’s response is evaluated based on:

The test follows IEC 60695-2-10 to 2-13 Dan Nomor seri UL 746A standards, ensuring global applicability.

Itu LISUN Peralatan Uji Kawat Pijar ZRS-3H is a precision instrument designed for conducting UL 94-compliant flammability assessments. Its advanced features ensure accurate, repeatable results across diverse material types.

Components such as circuit breakers, relays, and connectors must resist ignition under fault conditions. The ZRS-3H verifies whether thermoplastic enclosures meet UL 94 V-0, V-1, or V-2 ratings.

Modern vehicles integrate high-current electronics where overheating risks exist. Glow wire testing ensures materials in fuse boxes, wiring harnesses, and control modules do not propagate flames.

Materials in power strips, motor housings, and heating elements undergo testing to prevent fire hazards in consumer environments.

Flammability compliance is mandatory for plastic housings in diagnostic equipment, where electrical faults could endanger patients.

Cabin electronics and wiring systems must resist ignition even under extreme thermal stress.

Materials failing the test exhibit excessive flaming, dripping, or sustained combustion—factors disqualifying them from safety-critical roles.

Q1: What distinguishes the ZRS-3H from conventional glow wire testers?
The ZRS-3H integrates automated temperature regulation and force application, eliminating manual errors common in older models.

Q2: Can the apparatus test non-flat specimens (e.g., connectors or cables)?
Yes, its adjustable fixture accommodates complex geometries, provided the test surface contacts the glow wire uniformly.

Q3: How frequently should the heating wire be replaced?
Degradation occurs after ~50 tests or visible wear. Regular inspection ensures consistent thermal output.

Q4: Does the ZRS-3H support non-UL standards like IEC 60695?
Yes, it is calibrated for multiple international protocols, including IEC, GB/T, and UL.

Q5: What environmental conditions are required for accurate testing?
Tests should be conducted in a draft-free environment at 23°C ±2°C and 50% ±5% relative humidity per IEC 60695-2-10.

By adhering to these principles, manufacturers can ensure material compliance, mitigate fire risks, and enhance product safety across industries. The LISUN ZRS-3H provides a robust, standards-aligned solution for rigorous flammability assessments.