Heat Release System Of Bunched Cables

TESTech Instrument (Suzhou) Technologies is one of the leading manufacturers and suppliers of heat release system of bunched cables in China. Welcome to wholesale premium test equipment at competitive price from our factory. If you have any enquiry about quotation, please feel free to email us.

The heat release test system is designed fully in accordance with GB/T 31248-2014 and EN 50399:2011. It is developed by adding a heat release exhaust duct, air inlet piping, and fan system to the GB/T 18380.31 bunched cable combustion furnace.

The system is used to measure the combustion heat release performance of wires and cables during bunched cable fire testing.

• The air supply system is equipped with an additional rectangular ventilation duct, 300 +/- 10 mm wide, 80 +/- 5 mm high, and at least 800 mm long, together with an air box of 150 +/- 10 mm depth.
• A 2 mm thick stainless steel grille is fitted at the air inlet, with 5 mm openings and 8 mm pitch.
• An axial flow fan provides air supply, and the air volume is controlled by an inverter.
• The exhaust fan volume flow in the duct is also adjusted by an inverter.
• A bidirectional probe differential pressure device is used with an imported differential pressure sensor, range 0 to 500 Pa.
• Stainless steel smoke hood and exhaust duct with 400 mm internal diameter, corrosion resistant and visually clean.
• Air intake volume is 8000 L/min.
• The exhaust system includes smoke hood, exhaust duct, guide vanes, fan, gas sampling system, and analysis system, all designed in full accordance with the standard.

• Includes annular sampler, suction pump, particle filter, cold trap, exhaust valve, moisture filter, and CO2 filter.
• Three-stage filtration system with filtration accuracy of 0.5 um.
• Refrigerated cold trap with compressor cooling system, controlled at 0 to 5 C.
• Suction pump flow rate 33 L/min, vacuum degree 700 mmHg, pressure 2.5 bar.
• Drying tube for filtering moisture and impurities.
• Flow controller for suction flow control.
• Sampler with 12 holes arranged opposite the airflow direction, equipped with soot filter, located 685 mm from the smoke hood.

• Imported paramagnetic oxygen analyzer with O2 range 0 to 25%, linear deviation less than 0.5% of full scale, repeatability better than 50 ppm O2, and analyzer response time T90 less than 3.5 s.
• Imported infrared CO2 analyzer with CO2 range 0 to 10%, linear deviation less than or equal to 1% of full scale, repeatability less than or equal to 0.5% of full scale, and response time T90 less than 2.5 s.
• Smoke density analysis by incandescent light system with color temperature 2900 +/- 100 K, current fluctuation +/- 1.5%, linear smoke density output, time compensation, and imported photocell module.
• One-touch 5-level transmittance calibration system with imported optical filters, without manual filter replacement.
• Additional smoke density analysis uses incandescent light source with color temperature 2900 +/- 100 K and current fluctuation +/- 0.5%.
• The optical lens forms a 20 mm parallel beam with d/f less than 0.04.
• Imported Japanese photodetector with spectral response matching CIE, chromaticity standard function accuracy +/- 5%, output linearity within 3% of transmittance or 1% of absolute transmittance.
• System 90% response time does not exceed 3 s.
• Imported Omega thermocouples: three 0.5 mm diameter K-type sheathed thermocouples, temperature accuracy 0.5 C.
• Imported pressure sensor range 0 to 100 Pa, connected to a pressure sensor with accuracy +/- 2 Pa, and 90% response time not more than 1 s.
• Exhaust capacity 0 to 0.65 m3/s.
• Additional general-purpose 2 mm K-type sheathed thermocouples.
• Ambient pressure accuracy +/- 200 Pa.
• Minimum system recording interval 3 s.
• System time recording accuracy 0.1 s.

• Standard control cabinet with computer and Labview intelligent control system.
• Control parameter setting and display, test status and fault display, and query functions.
• Automatic acquisition and storage of all data, screen monitoring, real-time temperature curve, and real-time CO2/O2 data curves, with historical curve and data query.
• USB data export, historical curve query, and printing functions.
• The machine can be operated independently to complete tests.
• Acoustic alarm and alarm incident display functions.
• USB and RS232 ports on the control cabinet for external desktop or laptop operation.
• PLC control system with automatic ignition and ignition failure protection.
• Automatic control and display of propane gas flow.
• PLC plus inverter automatic control and display of exhaust gas flow.
• Automatic measurement and calculation of heat release rate, smoke production rate, oxygen consumption, and CO2 generation.

• Labview-based application software with friendly control interface, easy operation, and strong data interaction capability for scientific research analysis.
• Data acquisition frequency is configurable at 1 s, with a minimum of 0.1 s.
• Can display instrument status, calibrate instruments and store calibration results, collect test data, and calculate required parameters.
• All test and calculated data curves, including temperature, humidity, flow, pressure, transmittance, O2/CO2 concentration, mass, and heat flux, can be freely selected for main interface display and independently enlarged or reduced in separate windows.
• Test report supports switching between full-size graphics and thumbnail views for analysis.
• O2 and CO2 delay values can be independently revised online for deeper comparison and analysis of test results.
• Modular design for system control and calibration, with strong functionality and simple operation.
• Real-time digital and graphical monitoring display for temperature, humidity, flow, pressure, transmittance, and O2/CO2 concentration.
• Real-time calculation, analysis, and display of process parameters, including heat release rate, smoke production rate, oxygen consumption, CO2 generation, mass loss, radiant heat, wind speed, and total heat release.
• One-touch 5-level optical calibration at 0%, 25%, 50%, 79%, and 100%, with automatic calibration report generation.
• Calibration history can be queried.
• Powerful report module for previewing, editing, and generating reports.

• Water supply and drainage system.
• Power supply system and facilities.
• Gas and air supply.

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