Compliant with the standard: Fire resistance testing machine for cable and optical cable line integrity GB/T19216.11-2003/IEC60331-11:1999 "Line integrity testing of cables and optical cables under flame conditions - Part 11: Test apparatus - Separate flame supply with flame temperature not less than 750 ℃" design, Fully comply with GB/T19216.21-2003/IEC 60331-21:1999 "Line integrity testing of cables and optical cables under flame conditions - Part 21: Test procedures and requirements - Cables with rated voltage of 0.6/1.0kV and below" and GB/T19216.23-2003/IEC 60331-23:1999 "Line integrity testing of cables and optical cables under flame conditions - Part 21: Test procedures and requirements - Data cables" GB/T19216.25-2003/IEC 60331-25:1999 "Line integrity testing of cables and optical cables under flame conditions - Part 21: Test procedures and requirements - Optical cables" test standard requirements.
The design of the combustion chamber (see Figure 1 and Figure 2) adopts two methods for customers to choose from:
- The first method is to use brick walls construction, and our company has proposed a design plan and dispatched professional engineers to provide on-site construction guidance;
- The second method is to use appropriate materials to fix it on the angle iron bracket to form the entire cubic combustion chamber.
- Combustion chamber size: 3M x 3M x 3M, totaling 27 cubic meters. Can be a brick wall structure or a steel plate structure, chosen by the customer
- Sample holder: The sample is supported by two or three metal rings with an inner diameter of approximately 150mm, as shown in Figure 3
Figure 3
1-clip
- bracket
Dimensional units:mm (Dimensions without tolerance are approximate values)
Combustion device:
1. Spray lamp: a ribbon propane gas spray lamp with a nominal length of 500mm and a width of 15mm, equipped with a Venturi mixer. There are three rows of nozzles with a nominal diameter of 1.32mm and a center distance of 3.2mm drilled holes. See Figure 4
2. Flow meter: Air flow meter: 80L/min; Propane flow meter: 5L/min
3. The composition of the spray lamp control system includes: pressure regulating valve, piezoelectric igniter, extinguishing device, temperature control thermocouple, gas source (provided by your company), regulating valve, ignition device, gas pipeline, flow meter, Venturi mixer, spray lamp, ball valve, air pipeline, compressed air cylinder (user self-provided )
4. Timer: 0~99.99s/m/h, can be set arbitrarily
5. Ignition device: for automatic ignition
6. Temperature controller: composed of two temperature monitoring parts, with a temperature range of 0~1000 ℃ and can be set arbitrarily.
Figure 4
Dimensional units:mm
All dimensional tolerances are±5%
Three rows of staggered circular holes with a diameter of 1.32 mm and a spacing of 3.2 mm are arranged in the center of the nozzle.
Figure 5
Line load: Figure 5 Test transformer: 3000VA three pieces
Test voltage: AC1000V Test current: 3A
- Transformer Connection and power supply
- Fuse(2A) L1,L2,L3 Phase conductor(If there is L2.L3)
- Connection to L3(or L2,or L1) N Neutral conductor(If there is any)
- Support ring PE Protective conductor(If there is any)
- Experimental conductors and conductor groups
- Load and indicator devices (such as light bulbs)
- Sample
- Metal shielding(If there is any)
Compliant with standard: manufactured and produced according to the national standard GB/T19216.11-2003 IEC60331-11.
Scope of application: Used to test the ability of wires and cables to operate continuously under specified conditions under a certain fire source and time. The testing instrument consists of an integrated design of the testing and control parts. The outer shell and important components of the testing chamber are made of stainless steel and are resistant to smoke and gas corrosion. The control system has a high degree of automation, with automatic ignition, touch screen display, convenient observation and recording, and stable and reliable use.
Gas source for testing flames: Using propane gas or liquefied petroleum gas with a purity of over 95% (user provided ).
The burner is a belt type propane gas nozzle with a Venturi mixer, with a nozzle length of 500mm and a width of 15mm. There are three rows of staggered small holes on the nozzle, with a diameter of 1.32mm and a spacing of 3.2mm.
The nozzle should be at least 200mm away from the bottom of the box and at least 300mm away from any box wall. (Box to be equipped separately)
The inner diameter of the metal ring is approximately 150 mm.
Equipped with dual flow meters and pressure regulation, with an air flow meter range of 0.5-5 cubic meters per hour and a gas flow rate range of 0.1-1 cubic meters per hour. Equipped with a temperature measurement device (K-type thermocouple), under the condition of (750+50 ℃, -0 ℃), burn for 10 minutes, and the temperature difference between the two thermocouples shall not exceed 40 ℃. The test process is automatically controlled.
Equipped with intelligent detection function, it automatically alarms and turns off the fire source when a short circuit occurs in the sample during the testing process.
Provide 5 metal rings with an inner diameter of approximately 150 mm as required by the standard, and the distance between the metal rings can be freely adjusted to facilitate the fixation and support of the test piece.
Stainless steel sample holder, with a load-bearing capacity of 30kg.
Excluding combustion chamber (combustion chamber requires 27 cubic meters), customer provided air compressor (3HP)
Including load: the test voltage is adjustable from 0 to 1000V;
Current range: 0.1-3A, the test current can be adjusted according to standard requirements, but if it is greater than 3A, it will be protected;
The load capacity should ensure that the test sample can continue to be tested even when the test current approaches 3A.
The electrical circuit has appropriate protective devices to ensure that during combustion or cable breakdown, personnel will not be electrocuted and equipment will not malfunction due to cable breakdown.
During the electrical circuit integrity test of the cable to be tested during combustion, each circuit (three-phase) and neutral point must be connected in series with a fuse to protect the step-up transformer. When the safety wire fused disconnect, there must be an indicator light to display the melting or grounding phase.
For the convenience of operation, when calibrating the temperature, the fixed position of the specimen deviates from the ignition source. After calibrating the ignition source, manually move the specimen to the ignition source position.
If a touch screen is selected, it has the following functions: automatically detect the temperature of two thermocouples, display the temperature curve through the touch screen, and prompt an alarm when the standard set temperature upper and lower limits are exceeded (display curve time range of 15 minutes, digital display does not have this function).
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