Introduction to Glow Wire Flammability Testing

Flammability testing is a critical component of product safety evaluation, particularly in industries where electrical and electronic components are exposed to thermal stress. The испытание раскаленной проволокой is a standardized method for assessing the ignition resistance of materials and components when subjected to a heated element. This test simulates thermal conditions that may arise from malfunctioning electrical parts, ensuring compliance with international safety standards such as IEC 60695-2-10, IEC 60695-2-11, IEC 60695-2-12, and UL 746A.

The ЛИСУН ZRS-3H Glow-wire Test Apparatus is a precision instrument designed to conduct these evaluations with high repeatability and accuracy. It is widely adopted in industries including electrical and electronic equipment, automotive electronics, medical devices, and aerospace components, where material flammability directly impacts safety and regulatory compliance.

Принципы и методология тестирования

The glow wire test involves applying a heated Nichrome wire (the “glow wire”) to a test specimen under controlled conditions. The wire is heated to a specified temperature (typically ranging from 550°C to 960°C), and the material’s response is observed for ignition, flame persistence, and dripping behavior. Key parameters evaluated include:

• Ignition Time: The duration before the specimen ignites.
• Flame Duration: The time flames persist after removing the glow wire.
• Dripping Behavior: Whether molten material drops and ignites underlying tissue paper.

The LISUN ZRS-3H automates this process with a programmable temperature controller, ensuring consistent heating and precise adherence to test protocols. Its closed-loop feedback system maintains temperature stability within ±2°C, a critical factor for reliable data acquisition.

Technical Specifications of the LISUN ZRS-3H

The apparatus features a digital PID temperature controller, an automated force application mechanism, and an integrated fume extraction system to minimize operator exposure to combustion byproducts.

Отраслевые приложения и примеры использования

1. Electrical and Electronic Equipment

Components such as switches, relays, and connectors must resist ignition under fault conditions. The ЗРС-3Н verifies compliance with IEC 60695, ensuring that overheating does not lead to fire hazards in devices like power supplies and circuit breakers.

2. Бытовая техника

Toasters, coffee makers, and washing machines incorporate plastic housings that must not ignite when exposed to high temperatures. Manufacturers use the ЗРС-3Н to validate material selections before mass production.

3. Automotive Electronics

With increasing electrification, automotive components (e.g., battery management systems, infotainment units) undergo rigorous flammability testing. The ЗРС-3Н helps meet ISO 20653 and LV 312-1 standards.

4. Медицинские приборы

Patient-connected equipment must prevent fire risks. The ЗРС-3Н assesses enclosures and insulation materials in ventilators, monitors, and surgical tools.

5. Aerospace and Aviation

Cabin components, wiring systems, and control panels are tested to ensure they do not propagate flames under thermal stress, aligning with FAA and EASA regulations.

Competitive Advantages of the LISUN ZRS-3H

• Enhanced Repeatability: Closed-loop temperature control minimizes variability between tests.
• Automated Force Application: Eliminates manual errors in pressure application.
• Integrated Safety Features: Includes overheating protection and emergency shutoff.
• Multi-Standard Compliance: Supports IEC, UL, and GB/T standards without hardware modifications.

Научные данные и проверка

A comparative study conducted on polycarbonate samples (3 mm thickness) demonstrated the ЗРС-3Н’s precision:

These results confirm the apparatus’s ability to generate consistent, reproducible data critical for material certification.

Раздел часто задаваемых вопросов

Q1: What is the purpose of the glow wire test?
The test evaluates a material’s resistance to ignition and flame propagation when exposed to a heat source, simulating electrical fault conditions.

Q2: How does the ZRS-3H ensure temperature accuracy?
It employs a PID-controlled heating system with real-time feedback, maintaining ±2°C deviation from the setpoint.

Q3: Which industries require glow wire testing?
Electrical components, automotive electronics, medical devices, aerospace, and consumer electronics all mandate flammability assessments.

Q4: Can the ZRS-3H test non-metallic materials?
Yes, it is designed for plastics, insulation materials, and composite specimens.

Q5: What standards does the ZRS-3H comply with?
It meets IEC 60695-2-10/11/12, UL 746A, and GB/T 5169.10-13, among others.