GWFI and GWIT Glow-Wire Test Apparatus
1. Introduction
The glow wire tester is designed according to IEC60695-2-10 to IEC60695-2-13, UL746A, IEC829, DIN695 and VDE0471. The specific material and sharp heating wire is heated to specific temperature (550 ℃~960 ℃) for 1 min by max current, then vertical burns the EUT with certain pressure (0.95N) for 30s, then check if the test specimen and bedding material are burning, and count the burning time to judge the dangerousness of the specimen. Generally it is applied to test flammability, GWIT and GWFI of lighting lamps, electronic products and household appliances The equipment is applicable to flame resistance test of all levels of QC departments and corresponding enterprises.
The glow-wire test apparatus is controlled by controlled by 7-inch color touch screen and PLC.The shell is made of painted coating metal sheet and built-in air exhaust, and the front panel is transparent for easy observation of the experimental process.
Glow wire testing is an electrical safety test designed to evaluate the flame resistant properties of plastic materials used in electrical devices. Its purpose is to protect against the risk of fire from overheated or electrically energised parts which may cause the plastic material to ignite. This may occur in normal use, under reasonable abnormal use, malfunction or failure of the product. The glow wire simulates an over-heated part which then comes into contact with plastic materials.
2. Parameters
Control system | 7-inch color touch screen+PLC |
Glow-wire Loop | Diameter: 4mm ± 0.04mm Material: Ni/Cr(80/20) Sharp: 500W standardized loop, horizontally placed |
Thermocouple | Diameter: Φ1mm K type Material: K type (The insulating sleeve heat resist to 1250 ℃) |
Timer | Integrated in PLC Accuracy: ±0.1s |
Glow-Wire Heating Temperature | 500 ℃ ~1000℃ (presettable) temperature fluctuation < 3 ℃ |
Flame Height | Measuring with a steel ruler |
Pressure on test specimen | 0.95N±0.1N |
Maximum penetration depth | 7mm ± 0.5mm (adjustable) |
Specimen moving speed | 10mm /s ~25mm /s |
Test period | PLC auto control, with remote-controller |
Standard Silver Foil | Thickness:0.06mm Purity:≥99.8% Area: 2mm2 |
Ignition mat | White pine board with thickness of 10mm is covered with a layer of 12~30g/m2 wrapping tissue, 200±5mm below the sample. |
Accessories | Wrapping tissue, flat smooth wooden board, height gauge, silver foil, remote-controller. |
Chamber volume | ≥ 0.5m3 , matte black background, illuminance ≤ 20Lux, built in exhaust fan, exhaust hole: Φ70mm |
Dimension | 1100mm * 630mm *1300mm (W*D*H) |
Power | 220V/50Hz, 1KW |
