Testeur d'allumage à fil chaud IEC 60695-2-20 (HWI)

Hot Wire Ignition Tester | IEC 60695-2-20 HWI Tester | Hot-Wire Coil Ignition Test Apparatus

The Hot Wire Ignition Tester is a specialized fire hazard testing apparatus designed to evaluate the ignition resistance of solid electrical insulating materials under localized thermal stress. It simulates real-world overheating conditions by winding a precisely controlled Ni/Cr resistance wire (0.50 mm diameter) around the test specimen and measuring the time to ignition or sustained burning. Fully compliant with IEC TS 60695-2-20:2024 and GB4943.1-2011, this tester provides manufacturers, material suppliers, and certification laboratories with accurate, repeatable data for assessing fire risk in non-metallic components of household appliances, electrical equipment, and electronic products.

Paramètres techniques

The Hot Wire Ignition Tester features a robust test chamber with excellent visibility and ventilation, combined with a precision winding mechanism that ensures consistent coil spacing and tension. The Ni/Cr heater wire is powered by a high-stability adjustable supply capable of maintaining exact power density. All critical dimensions (wire diameter, spacing, tension, and electrode positions) are manufactured to tight tolerances to guarantee compliance with IEC TS 60695-2-20 requirements and excellent test repeatability.

Principe de test

The Hot Wire Ignition Tester evaluates the ignition susceptibility of solid electrical insulating materials by simulating localized overheating conditions that may occur in real electrical products. The test specimen is prepared according to the standard, and a precisely controlled Ni/Cr resistance wire (0.50 mm diameter) is wound around it with exact spacing and tension.

The wire is then energized to a specified power density — typically 0.26 W/mm — for a preset duration. The tester automatically records the time from energization until ignition occurs, or until the test concludes without ignition (commonly up to 120 seconds). Key observations include whether flaming appears, the duration of any flaming, whether the material self-extinguishes, and any dripping or other phenomena. This method effectively replicates small heat sources (<13 mm) such as glowing wires or faulty components, providing critical data for fire hazard assessment.

Atténuation des erreurs courantes

To ensure accurate, repeatable, and reliable test results, the following best practices are strongly recommended:

• Verify the hot wire diameter, resistance value, and exact power density before each test series
• Maintain precise winding spacing (6.3 ± 0.2 mm) and consistent tension (5.4 N) using the calibrated weight
• Use properly conditioned specimens stored under standard laboratory environmental conditions
• Confirm stable ambient temperature and humidity throughout the test
• Perform regular calibration of the power supply, timing system, and winding mechanism
• Document detailed observations including ignition time, flaming duration, and self-extinguishment behavior for accurate HWI classification and traceability

Principaux cas d'utilisation et valeur commerciale

The Hot Wire Ignition Tester is an essential instrument for material suppliers, appliance manufacturers, and certification bodies. It enables precise evaluation of the fire hazard potential of solid insulating materials used in electrical and electronic products. By identifying materials that are prone to ignition under localized overheating, the tester supports the selection of safer materials, optimization of product design, and reduction of fire-related risks. Ultimately, it helps manufacturers demonstrate compliance with international safety standards, accelerate certification processes, and enhance overall product safety and market confidence.

Applications industrielles et scénarios de laboratoire

• Household Appliance & Electrical Equipment Manufacturers — ignition resistance evaluation of insulating parts and components
• Electronic and Electrical Component Suppliers — fire hazard assessment of plastic materials and enclosures
• Laboratoires de certification tiers — IEC 60695-2-20 and GB4943.1 compliance and type testing
• New Product R&D Centers — development and qualification of advanced flame-retardant materials
• Départements de contrôle qualité — incoming material inspection, batch verification, and ongoing reliability monitoring

Avantages de l'approvisionnement stratégique et soutien mondial

• Precise control of power density, winding parameters, and timing for excellent test repeatability
• Robust, well-ventilated test chamber with clear observation window for safe and convenient operation
• High-quality construction designed for continuous laboratory use with minimal maintenance
• Fabriqué selon un système de gestion de la qualité certifié ISO 9001, ISO 14001, ISO 45001 et CE
• Garantie complète d'un an, assortie d'une assistance technique réactive à vie depuis notre centre de Dongguan.

Conformité et assurance réglementaire

This Hot Wire Ignition Tester is engineered and manufactured in strict accordance with IEC TS 60695-2-20:2024 (Hot-wire ignition (HWI) test method) and GB4943.1-2011. It provides a standardized, highly reproducible platform for evaluating the ignition susceptibility and fire hazard potential of solid electrical insulating materials used in electrical and electronic products.

Intégrité et validation métrologiques

• Calibrage en usine gratuitChaque unité est livrée de série avec un certificat d'étalonnage complet et traçable.
• Accréditation ISO 17025 par un organisme tiers: Available upon request to meet the strictest laboratory and certification requirements.
• Vérification des performances: Annual calibration of power density, timing device, and winding mechanism is recommended for high-volume testing and certification use.