IEC 60695-2-20 Hot Wire Ignition Tester

Product No: RSY-LT

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The RSY-LT Hot Wire Ignition Tester is a professional testing device designed by LISUN specifically for evaluating the ignition characteristics of solid insulating and combustible materials under the action of a hot wire. It simulates the ignition risk to surrounding materials when an electric heating element (such as resistance wire or motor winding) overheats. By precisely controlling the hot wire temperature, pressure application time, and contact pressure, it measures the material’s hot wire ignition temperature (HWIT) and hot wire flammability index (HWFI), providing crucial data support for material selection, product safety design, and compliance certification.

The RSY-LT Hot Wire Ignition Tester adopts an integrated structural design, incorporating a hot wire heating control system, sample clamping device, and combustion monitoring module. This enables automated control of the testing process, effectively avoiding human error and ensuring the accuracy and repeatability of test results. It is widely used in the electrical and electronic, home appliance, new energy, and insulating materials industries, and is suitable for testing the hot wire ignition performance of various solid combustible materials such as plastics, rubber, and composite materials. It also meets the high-standard testing needs of research institutions and third-party testing laboratories.

Standards:

Standards No. Clause/Figure	Standards Name
IEC TS 60695-2-20:2024	Fire hazard testing – Part 2-20: Glowing/hot-wire based test methods – Hot-wire ignition test (HWI) method – Apparatus, verification, test method and guidance
IEC 60947.1:2020（Annex M Figure M.1）	Low-voltage switchgear and controlgear – Part 1: General rules
IEC 61800-5-1:2022（Clause 5.2.5.4 Figure 27）	Adjustable speed electrical power drive systems – Part 5-1: Safety requirements – Electrical, thermal and energy
UL 746A:2023（Clause 32）	Standard for Polymeric Materials – Short Term Property Evaluations
GB/T 14048.1-2023（Annex M Figure M.1）	低压开关设备和控制设备第 1 部分：通用要求

Specifications:

Test Function	Hot Wire Ignition Temperature (HWIT) and Hot Wire Flammability Index (HWFI) tests; compliant with IEC 60695-2-20
Hot Wire Parameters	1. Base heating wire: Ni-chromium alloy, φ0.5±0.01mm, length 100±2mm, adjustable from 500 to 1000℃, temperature stability ≤±10℃; 2. Heating wire coil: Ni80/Cr20, φ0.5mm, length 250±5mm, thermal resistance 5.28Ω/m, heating power 0.26W/mm±4%
Hot Wire Pretreatment	Hot wire coil pre-annealing: time 8s~12s (preset), power 0.26W/mm±4%
Pressure Control	1. Hot wire – Sample contact pressure 1±0.1N, pressure application time 0~999.9s (default 30s±1s); 2. Coil winding: tension 5.4±0.05N, spacing 6.3±0.2mm, 5 turns within a 31.5±0.5mm diameter.
Timing Parameters	1. Ignition/combustion duration: 0~999.9s, accuracy 0.1s; 2. Coil test time: 120s (1s~999.9s preset)
Sample Specifications	1. Dimensions: Length 125±5mm, Width 13±0.5mm, Thickness 0.75±0.1mm/1.5±0.1mm/3±0.2mm; 2. Five sample coils are required for coil testing.
Sample Holder Parameters	The distance from the sample holder surface to the connector plate is 70mm, and the height is 60mm, for mounting the hot wire coil.
Combustion Box Specifications	Volume ≥ 0.5m³ (other sizes can be customized)
Body Material	High-temperature coated steel structure, resistant to high temperatures and corrosion, suitable for long-term high-temperature testing environments.
Operation Display	Self-developed extra-large LCD touchscreen + clear indicator lights + remote control operation

Typical Applications:
1. Electrical and Electronic Industry
1.1 Motor Winding Insulation: Testing insulation paper/varnish, simulating overload and overheating, preventing short-circuit fires.
1.2 Connector/Relay Housings: Testing PA66 and other plastic housings, checking for contact overheating, preventing circuit burnout.

2. Home Appliance Industry
2.1 Heating Appliance Inner Liners: Testing Teflon and other coatings, simulating high temperatures of heating elements, preventing ignition and flammable dripping.
2.2 Control Panels: Testing ABS/PC/ABS housings, preventing circuit board short-circuit overheating and ignition.

3. New Energy Industry
3.1 Power Battery Packs: Testing PP/glass fiber separators, simulating cell thermal runaway, preventing flame spread.
3.2 Charging Piles: Testing epoxy glass cloth and other insulation components, checking for contactor/transformer overheating, ensuring safety.

4. Materials Industry
4.1 Engineering Plastics: Testing PA66+GF30 and other samples, optimizing flame-retardant formulations, and assisting in selection.
4.2 Rubber/Composite Materials: Testing the safety of electrical wire insulation rubber and fiberglass composite materials under different overheating scenarios.

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