ZONSKY Bunched Cable Vertical Flame Spread Tester is designed to evaluate the flame spread characteristics of grouped (bunched) cables under vertical flame exposure. The apparatus subjects bundled cables to a standardized flame source, measuring parameters such as flame spread rate, heat release, and smoke production. It provides critical data on fire propagation potential in cable installations.Talk To Our Team
Compliance:
IEC 60332-3-10:2018 – Test on electric and optical fiber cables under fire conditions—Part 31: Test for vertical flame spread of vertically-mounted bunched wires or cables—Apparatus.
IEC 60332-3-21:2018 – Test for vertical flame spread of vertically-mounted bunched wires or cables—Category A F/R.
IEC 60332-3-22:2018 – Test for vertical flame spread of vertically-mounted bunched wires or cables—Category A.
IEC 60332-3-23:2018 – Test for vertical flame spread of vertically-mounted bunched wires or cables—Category B.
IEC 60332-3-24:2018 – Test for vertical flame spread of vertically-mounted bunched wires or cables—Category C.
IEC 60332-3-25:2018 – Test for vertical flame spread of vertically-mounted bunched wires or cables—Category D.
Cable Bundle Vertical Flame Test Machine Main Parameters
Parameter
Details
Test Box
Self-standing, (1000 ± 50) mm × (2000 ± 50) mm × (4000 ± 50) mm. The rear and both sides are thermally insulated (heat transfer coefficient: 0.7 W/m²·K). Made of high-grade stainless steel, with a 65mm thick thermal insulation mineral fiber core and an external baking paint coating.
Air Supply
Adjustable air inlet to maintain (5000 ± 500) L/min before and during tests (Complies with GB/T 18380.31).
Fire Suppression
A water spray system automatically extinguishes the fire after a predefined test duration (1 hour).
Ignition Source
Automatic ignition via high-voltage pulse.
Exhaust System
Located at the top of the combustion box, ensuring uniform gas discharge. Multiple air inlet holes at the bottom regulate oxygen levels.
Observation Window
Toughened glass window installed in the front door for real-time monitoring. The door seals completely during testing to prevent combustion gases from escaping.
Flame Temperature
Adjustable from 450°C to 950°C.
Combustion Gas
Propane with a purity of 95% (prepared by the customer).
Power Supply
AC220V.
Chassis Size
L1000 × W2000 × H4000 mm (Complies with IEC 60332-3-10, Clause 5.1).
Control Box
Made of baking varnish, CNC-machined for precision.
Blowtorch System
Stainless steel, corrosion-resistant, and anti-rust. Features 242 holes (1.32mm diameter) with 3.2mm spacing, arranged in three staggered rows for stable burning.
Control System
Uses a relay control system with high-quality domestic electronic components.
Safety Features
Includes power overload, short circuit protection, and control circuit overload protection.
Combustion Control
Includes air flow meter, propane flow meter, regulating valve, ignition device, and temperature measuring device.
