Large Combustion Test Equipment For Wires And Cables

1. Scope of application:

It is suitable for testing the flame retardant properties of the insulating layer of wires and cables under abnormal conditions such as overheating and overcurrent. It is produced in strict accordance with the UL1581 sect 1080.1~1080.14 standard, and has been evaluated by Suzhou and Guangzhou Meihua UL companies, fully complying with the VW-1 Flame Test combustion test standard, and is suitable for UL1581, UL13, UL444, UL1655 VW-1 and FT-1, FT-2 of CSA. With beautiful appearance, reasonable internal structure, simple and quick operation, and accurate testing, it is widely used by wire and cable manufacturers, colleges and universities and commodity inspection departments.

It is composed of test part and control part and adopts integrated design, which is convenient for on-site installation and debugging. The control system has a high degree of automation and has an automatic ignition function. Real-time display of temperature and time, easy to observe and record, stable and reliable use.

The back of the box is equipped with a strong exhaust and smoke exhaust system. After the test is completed, it is opened at the same time as the air supply system, which can discharge the exhaust gas to the outside in time. The front of the box is provided with a sealed tempered glass window and an operation window, which is convenient to observe the test process and facilitate the operation of the experimenter.

2. Compliant standards:

The test apparatus meets the requirements of UL1581-2006 Section 1060 (Vertical Burning and FT1 Test), Section 1061 (Cable Burning Test), Section 1080 (VW-1 Burning Test), and Section 1100 (Horizontal Specimen/FT2 Burning Test Requirements.

3. Main technical parameters:

1. Instrument composition: It consists of two parts: combustion box and control part.

2. Test box: the volume is greater than 4m³. The area above the test flame is larger than 2.0m³; the inside of the box is composed of a frame, covered with a 1.2mm thick electrostatic high-temperature paint steel plate, processed by CNC machine tools, and the outside is sprayed with plastic. The second layer is made of black matte paint, which has the characteristics of anti-rust and anti-corrosion.

3. There is a ventilation and smoke exhaust system on the back of the box, and forced exhaust is used. The exhaust gas can be discharged outdoors after the test is completed.

4. Operating equipment: There is an operating window under the observation window, with a length of about 600mm corrosion-resistant long-arm gloves, which is convenient for sealing operation.

5. Lighting equipment: one anti-fog and anti-smoke incandescent lamp

6. Flame time: 0~99.99S/M

7. Stop burning time: 0~99.99S/M

8. The number of flames: 0~99 times

9. This equipment has the functions of automatic ignition, combustion, stop combustion, timing and counting, with high test accuracy

10. Working power supply: AC220V, 50HZ

11. Total power: 500W

12. Dimensions of the equipment: L1800mm*W1120mm*H2100mm (excluding the size of the exhaust port and casters)

4. Temperature measurement part:

1. Heat conductors (copper conduits and thermocouples)—the conduit structure should be electrolytic copper with extremely high conductivity. The electrolytic copper weight was 10 g.

2. Armored K-type thermocouple, with 0.5mm diameter stainless steel tube as jacket.

3. The hand-held temperature control meter matches the K-type thermocouple. Its reading can be greater than 1000 ℃. After the temperature is measured, it can be removed from the box, which has the characteristics of intuitive and convenient counting, and improves the service life of the thermocouple. )

5. Test device and test fixture:

The test bracket is assembled from high-quality SUS304 stainless steel + bakelite, which has the characteristics of rust resistance and corrosion resistance.

6. Blowtorch:

1. The blowtorch fully meets the requirements of ASTM D 5025-99.

2. Standard power: 500W to satisfy vertical and horizontal combustion respectively.

3. The diameter of the nozzle: 0.90±0.03mm, the length of the nozzle lamp: 1.60±0.05mm, the height of the nozzle from the air inlet is 102mm

4. Torch angle: 90°/20° adjustable (the longitudinal axis is kept on the vertical plane and has an included angle of 45° with the vertical direction), and the natural

Gas, inner flame 40mm, outer flame 125mm.

Seven, gas and gas flow control system

1. Gas: methane (purity 98%), calorific value 998BTU (British Thermal Unit)/cubic foot. 37.1 megajoules per cubic meter. (guest

household)

2. The gas control system includes: flow meter, U-shaped pressure gauge, pressure gauge, and pressure regulating valve.

3. Flowmeter: the range is 1000ml/min, and the accuracy is 2%.

4. U-type pressure gauge: water column 0-36 inches, analysis degree is 0.1 inches.

5. Pressure gauge: 0-15kPa (0-30psi) with a resolution of 1kPa.

6. Pressure regulating valve: 0～10kg/min continuously adjustable.

Eight, control part: controlled by PLC + touch screen. The flame application time, the stop combustion time, and the number of flame application times can be set directly on the touch screen.