Fire-Resistance Cable Burning Test Apparatus,Accurate Fireproof Measurement for Wire Insulation

The Fire-Resistance Cable Burning Test Apparatus (Cable Fire Integrity Tester) is designed to evaluate the ability of mineral-insulated cables and cables with fire-resistant layers to maintain circuit integrity under flame exposure. The apparatus subjects the test sample to a controlled gas flame under specified temperature, time, and electrical loading conditions, monitoring for short circuits or open circuits. This allows assessment of the cable’s fire-resistance performance. The system is suitable for type tests, factory inspections, and research verification of fire-resistant cables.

Applications

Based on practical applications of domestic and international fire-resistant and flame-retardant cable testing equipment, this apparatus is suitable for the following products and scenarios:

Mineral-insulated cables (MI cables)

Power cables with fire-resistant layer structures

Fire-resistant building wires

Low-voltage control and signal cables

Fire-resistant optical fibers and composite cables

Fire-resistant cables rated ≤ 450/750 V

Verification of fire, flame-retardant, and water-resistant fire performance

Applicable users include cable manufacturers, electrical inspection agencies, fire safety product testing centers, research institutes, and third-party laboratories.

Standards

The apparatus is designed to comply with and support the following standards:

GB/T 19216-2008 — Test methods for cable or optical fiber circuit integrity under flame conditions

GB/T 19666-2019 — General requirements for flame-retardant and fire-resistant wires and cables

IEC 60331-2009 — Tests on electric cables under fire conditions

BS 6387 — Performance requirements for maintaining circuit integrity of cables under fire conditions

BS 8491 — Assessment methods for fire-resistance of cables

Technical Specifications

Item	Technical Specification
Test Station	Single station (one sample at a time)
Sample Length	≥1200 mm
Burner Type	Ribbon propane burner with Venturi mixer
Burner Nominal Length	500 mm
Gas Flow Rate	0–50 L/min (adjustable)
Gas Flow Accuracy	±0.1 L/min
Air Flow Rate	0–200 L/min (adjustable)
Air Flow Accuracy	±5 L/min
Flame Temperature Range	450–950 °C (adjustable)
Temperature Sensors	K-type stainless steel thermocouples ×2
Thermocouple Max Temperature	≤1100 °C
Control Method	PLC + touchscreen operation
Power Consumption	3 kW
Power Supply	AC 380 V ±10%, 50 Hz, three-phase five-wire
Gas Supply	Propane / LPG + compressed air

Product Features

Mass flow controllers enable high-precision closed-loop control of gas and air flow.

Wide flame temperature adjustment range meets different fire-resistance test requirements.

Circuit integrity detection via breaker replaces traditional fuse structures, improving maintenance efficiency.

Continuous live monitoring system detects open or short circuits in real-time.

Side-mounted exhaust system ensures stable oxygen levels during combustion.

PLC + touchscreen control allows intuitive parameter settings and excellent test repeatability.

Compatible with multiple fire-resistance test modes, including water-spray fire-resistance and mechanical impact tests.

Accessories and Consumables

Category	Name	Description
Standard Configuration	Tubular gas burner	Suitable for fire-resistance and water-spray fire tests
	Mass flow controller	Precision control of gas and air
	K-type thermocouple	Temperature monitoring
	Continuous monitoring device	Includes transformer and indicator lights
	Exhaust assembly	Rapid exhaust of combustion gases
Optional	Water-spray fire device	Complies with BS 6387 W-class
	Mechanical impact device	Complies with BS 6387 Z-class
Consumables	Gas	Propane or LPG
	Test cable	Test specimen
	Seals	Periodic replacement required

Testing Principle

During the test, the mass flow controller precisely adjusts the gas-to-air ratio, producing a stable and controllable high-temperature flame. The test cable is subjected to continuous flame while all cores are energized at rated voltage and a load current close to 0.1 A.

A continuous monitoring system observes the circuit status in real-time. Any short-circuit or open-circuit condition triggers an immediate signal, allowing evaluation of whether the sample maintains circuit integrity under the specified flame and loading conditions.

Operation Instructions

Ensure all gas lines, air lines, and exhaust systems are properly connected before testing.

Set the gas flow, air flow, and test duration according to the relevant standard.

Activate the exhaust system before ignition to ensure combustion gases are removed.

Do not open the test chamber door during testing.

For water-spray or water-jet fire tests, calibrate the flow meters and verify the tray setup before ignition.

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