Glow Wire Tester: Application and Technical Analysis in Flame Retardancy Testing

Abstract
With the rapid development of electrical and electronic products, household appliances, lighting equipment and other industries, the flame retardancy of products and plastic components has become a core indicator to ensure operational safety. As a key testing device simulating high-temperature contact scenarios, the glow wire tester plays an irreplaceable role in evaluating material flame retardancy. This paper takes the LISUN ZRS-3H Glow Wire Tester as the research object, systematically elaborates on its R&D background, working principle, technical characteristics and reference standards, and analyzes its typical applications in electronics, lighting equipment, electrical appliances, automotive electronics and other fields in detail. A specification parameter table is provided to intuitively present the device’s performance advantages. By accurately reproducing standard test conditions, the device achieves high-precision detection of material ignitability, glow wire ignition temperature (GWIT), flammability and glow wire flammability index (GWFI), providing reliable data support for product fire safety design and compliance certification. It is of great significance for promoting the implementation of safety standards in related industries.

1. Introduction
During the operation of electrical and electronic products, household appliances and other equipment, components such as chips, resistors and heating plates generate high temperatures for long periods. If the flame retardancy of surrounding plastic components is insufficient, fire accidents are likely to occur, endangering users’ lives and property safety. Therefore, flame retardancy testing of products and plastic components is an essential link in product R&D, production and market access. The glow wire tester accurately evaluates the fire safety performance of materials under specific thermal loads by simulating the “glow wire high-temperature contact” scenario, making it a core device in the field of flame retardancy testing.

As a professional R&D enterprise of testing equipment, LISUN has launched the ZRS-3H Glow Wire Tester to meet industry needs. Strictly complying with the latest domestic and international fire safety standards, the device integrates intelligent testing functions, effectively solving problems such as complex operation and low data accuracy of traditional testing equipment, and providing enterprises with efficient and reliable flame retardancy testing solutions. This paper will comprehensively analyze the device from aspects of technical characteristics, application scenarios and after-sales support.

ZRS-3H Glow-wire Test Apparatus

2. Technical Characteristics and Reference Standards of LISUN ZRS-3H Glow Wire Tester
2.1 Core Working Principle
The core principle of the LISUN ZRS-3H Glow Wire Tester is to use a nickel-chromium alloy glow wire to contact the test sample under specific temperature and contact force conditions, simulating the contact scenario between high-temperature components and surrounding materials during product operation. It records key data such as the ignition time and extinction time of the sample, thereby evaluating core indicators including material ignitability, glow wire ignition temperature (GWIT), flammability and glow wire flammability index (GWFI), providing quantitative basis for determining material flame retardancy.

2.2 Reference Standards
The device strictly complies with multiple authoritative domestic and international standards to ensure the compliance and versatility of test results, including:
• Domestic Standards: GB/T 5169.10-2023, GB/T 5169.11-2017, GB/T 5169.12-2024, GB/T 5169.13-2024, GB/T 4706.1-2024, etc.
• International Standards: IEC 60695-2-10:2021, IEC 60695-2-11:2021, IEC 60695-2-12:2021, IEC 60695-2-13:2021, etc.
• Industry Standards: UL 746A:2023 (Clause 35), ISO 6722-1:2019, etc.

2.3 Core Specifications and Parameters
The LISUN ZRS-3H Glow Wire Tester is available in two models: with cabinet (ZRS-3H) and without cabinet (ZRS-3HS). Its core specifications and parameters are shown in the following table:

2.4 Intelligent Technical Advantages
The LISUN ZRS-3H Glow Wire Tester features multiple intelligent functions, significantly improving testing efficiency and data accuracy:
• Automatic Timing and Recording: Automatically records ignition time and flame extinction time, avoiding human operation errors with an accuracy of ±0.1s;
• Automatic Disengagement Function: The glow wire automatically disengages after the specified glowing time, strictly complying with standard requirements;
• User-Friendly Operation Design: Adopts self-developed large LCD touch screen + remote control operation, combined with clear indicator lights, reducing operational thresholds;
• Stable Structural Design: High-temperature sprayed steel structure body is resistant to high temperature and corrosion, adapting to long-term high-temperature testing environments and extending equipment service life.

3. Typical Application Fields of LISUN ZRS-3H Glow Wire Tester
3.1 Electrical and Electronic Industry
Plastic components of electrical and electronic products are often close to high-temperature components during operation, and their flame retardancy directly affects product safety. Application scenarios of the LISUN ZRS-3H Glow Wire Tester include:
• Consumer Electronics Components: Mobile phone/computer casings, charger plastic housings, non-metallic parts of headphones/speakers, etc. It evaluates the ignition risk when they are close to high-temperature components such as chips and resistors, ensuring products comply with safety standards such as GB/T 4706.1-2024 and IEC 60335-1:2023;
• Core Components of Household Appliances: Plastic brackets inside refrigerators/washing machines, insulation parts of air conditioner motors, microwave oven door seals, non-metallic parts around rice cooker heating plates, etc. It verifies their flame retardant stability under long-term high-temperature environments, avoiding fire accidents of the entire machine caused by component ignition.

3.2 Lighting Equipment Industry
After long-term lighting, the temperature of heating components in lighting equipment rises, placing strict requirements on the flame retardancy of surrounding materials. The main applications of the device include:
• LED Lighting Components: LED driver power housings, plastic heat dissipation parts of lamps, lamp holder insulation materials, etc. It tests their flame retardant performance when lamps work for a long time, meeting relevant requirements of GB 7000.1-2015 and IEC 60598-1:2020;
• Traditional Lighting Components: Fluorescent lamp ballast housings, plastic parts of halogen lamp brackets, etc. It evaluates their glow wire ignition temperature (GWIT) and glow wire flammability index (GWFI) when in contact with high-temperature lamp bodies, ensuring fire safety during the use of lighting equipment.

3.3 Electrical Equipment Industry
Electrical equipment is directly in contact with circuits. Short circuits, overloads and other conditions are prone to generating high temperatures, and flame retardancy is the core of its safety performance. Application scenarios of the device include:
• Wire and Cable Insulation Layers: PVC/PE insulation sheaths of household power cords and industrial control cables. It tests their flame retardancy during short-circuit heating or when close to high-temperature equipment, complying with GB/T 18380.1-2022 and IEC 60332-1-2:2017 standards;
• Switch and Socket Components: Socket panels, plastic parts around switch contacts. It verifies their flame resistance when heating due to current overload, avoiding circuit fires caused by component combustion, and meeting GB/T 2099.1-2021 and IEC 60884-1:2022 requirements.

3.4 Automotive Electronics Industry
Automotive electronic components and non-metallic interior parts need to adapt to the high-temperature environment of the engine compartment or the high-temperature scenario after exposure to sunlight in summer, so flame retardancy is crucial. Applications of the device include:
• On-Board Electronic Components: On-board navigator housings, plastic housings of car chargers, insulation layers of automotive wiring harnesses. It tests their flame retardant performance in the high-temperature environment of the engine compartment or when close to on-board power modules, complying with relevant regulations of ISO 6722-1:2019 and GB/T 2408-2021;
• Non-Metallic Interior Parts: Plastic parts of automotive center consoles, local parts of door trim panels. It evaluates their ignition risk under high-temperature environments inside vehicles, ensuring the safety of vehicle occupants.

3.5 Material R&D and Testing Field
In material R&D and third-party testing, the device can provide accurate flame retardancy data to support product compliance certification:
• Plastic Material Performance Evaluation: For general engineering plastics such as ABS, PC, PP, PA, or flame-retardant modified plastics (e.g., flame-retardant ABS, glass fiber reinforced flame-retardant PC), it determines their glow wire ignition temperature (GWIT) and glow wire flammability index (GWFI), providing data support for enterprises to select materials that meet safety standards;
• Third-Party Testing and Certification: Testing institutions such as SGS, UL, and CQC can use the device to complete testing items required by standards such as GB/T 5169.10-2023 and IEC 60695-2-12:2021, issue flame retardancy test reports, and help enterprises’ products pass market access certification.

4. After-Sales Support and Industry Value
4.1 Comprehensive After-Sales Support
The LISUN ZRS-3H Glow Wire Tester has been on the market for more than 10 years. The enterprise’s engineer service team has accumulated rich after-sales experience and compiled a complete Frequently Asked Questions (FAQ) list. Users can query and solve most problems encountered during use through official channels. At the same time, the enterprise continuously updates after-sales support content to provide users with long-term technical support and ensure stable operation of the device.

4.2 Industry Application Value
As a high-precision flame retardancy testing device, the LISUN ZRS-3H Glow Wire Tester’s industry value is mainly reflected in three aspects: first, it provides data support for enterprise product R&D, helping enterprises optimize fire safety design and improve product quality; second, it assists enterprises in meeting domestic and international safety standard requirements, successfully passing market access certification and enhancing product market competitiveness; third, it promotes the implementation of fire safety standards in related industries, reduces safety accidents caused by insufficient material flame retardancy, and protects consumers’ lives and property safety.

5. Conclusion
As a high-precision device specially developed for flame retardancy testing of electrical and electronic products, household appliances, lighting equipment and other products as well as plastic components, the LISUN ZRS-3H Glow Wire Tester achieves accurate detection of material ignitability, glow wire ignition temperature (GWIT), flammability and glow wire flammability index (GWFI) by simulating the “glow wire high-temperature contact” scenario. Strictly complying with authoritative domestic and international standards, the device integrates intelligent operation and data recording functions, and has a wide range of application scenarios and significant technical advantages. It not only provides enterprises with efficient and reliable flame retardancy testing solutions, but also offers important support for the implementation of industry safety standards and the improvement of product safety performance. With the continuous improvement of fire safety requirements in related industries, the LISUN ZRS-3H Glow Wire Tester will play a more important role in the field of flame retardancy testing, contributing to promoting the high-quality and safe development of the industry.