GB/T19216 Fire resistance testing machine for wires and cables

GB/T19216 Fire resistance testing machine for wires and cables (Model)K-R19216）

This equipment includes two testing methods: fire resistance test, impact resistance+fire resistance test

one、GB/T19216 Fire resistance testing machine for wires and cables, meets the standards:

GB/T19216.11-2003/IEC60331-11:1999 "Line integrity testing of cables and optical cables under flame conditions - Part 11: Test apparatus - Individual flame supply with flame temperature not lower than 750 ℃" design;

GB/T19216.12-2008 Line integrity testing of cables or optical cables under flame conditions - Part 12: Test apparatus - Flame temperature not lower than 830 ℃ for supplying fire and applying impact

GB/T19216.21-2003/IEC60331-21.1999 "Line integrity tests for cables and optical cables under flame conditions - Part 21: Test procedures and requirements - Cables with rated voltage of 0.6/1.0KV and below";

GB/T19216.23-2003/IEC60331-23:1999 "Line integrity tests for cables and optical cables under flame conditions - Part 23: Test procedures and requirements - Data cables";

GB/T19216.25-2003/IEC60331-25:1999 "Line integrity testing of cables and optical cables under flame conditions - Part 25: Test procedures and requirements - Optical cables" test standard;

GB/T19216.31-2008 Integrity testing of cables or optical cables under flame conditions - Part 31: Test procedures and requirements for supplying fire and applying impact - Cables with rated voltage of 0.61/1kV and below

Simultaneously comply with the fire resistance performance codes N and NJ of the GB/T19666-2019 "General Rules for Flame retardant and Fire resistant Wires and Cables" standard;

Main technical indicators:

1. Test station: 1 station, test one sample at a time.

2. Cable sample size: length>1200mm. Length>1500mm.

3. Sample bracket: circular ring bracket, and steel test ladder

4. Venturi air propane hybrid spray lamp: 500 * 15mm each (fire-resistant), 500 * 10mm each (fire-resistant+impact),

Three rows of staggered drill holes with a nominal diameter of 1.32mm and a center to center distance of 3.2mm.

Flame temperature: adjustable from 450 ° C to 950 ° C.

5. Combustion gas: Propane with a purity of 98% (to be provided by the customer).

6. Combustion supporting gas: Compressed air. (The air pressure must reach 1MPA or above) to be provided by the customer.

7. Temperature sensing system: Imported stainless steel K-type thermocouple with a diameter of 1.5mm. (Material resistant to temperatures above 1100 ° C).

8. Air flow rate: using a mass flow meter, with a large range of 250L/min.

9. Propane flow rate: using a mass flow meter, with a large range of 30L/min.

10. Ignition device: for automatic ignition.

11. This machine is equipped with a strong exhaust system. After the test is completed, the strong exhaust fan can quickly exhaust the exhaust gas from the box.

The chassis adopts a double-layer partition structure, with high-temperature insulation cotton filled in the middle, effectively reducing the temperature of the outer wall during the test process to<45 ° C

12. Power supply voltage: AC380 (± 10%) V/50HZ.

13. Machine operating power: 1KW.

14. The exhaust system is located at the top of the chassis, which can effectively and quickly discharge exhaust gas. There are several air inlet holes at the bottom, which can ensure the oxygen content inside the chassis during the test process and make the test results more accurate.

15. Install a front door with tempered glass windows, allowing for easy observation of the test results at any time. During the experiment, the door was closed to prevent harmful substances generated by combustion from contaminating the indoor air.

16 Temperature measurement system: 2 K-type thermocouples

17. Combustion chamber: Internal dimensions: 3M × 3M × 3M, totaling 27 cubic meters. (Customers can choose or customize the combustion chamber body with color steel rock wool board material or stainless steel material)

18. Control box: The control box is made of cold-rolled steel plate, processed and formed by CNC machine tools, with a beautiful and elegant circular arc shape.

19. Combustion device: This device is made of welded stainless steel material, which is lightweight, aesthetically pleasing, and easy to move and clean.

20. Control system: Adopting PLC+Weilun touch screen precision control, accurate timing, simple operation, automatic data recording and calculation.

Adopting a relay control system, all electronic components are made of domestic leading Xian brand, which can better ensure the performance and detection accuracy of the machine.

21. Continuous detection device: During the test, allow current to pass through all cores of the cable. Three single-phase transformers have sufficient capacity to maintain a maximum allowable leakage current of 3A at the test voltage. Connect a lamp to each core wire at the other end of the cable and load a current of nearly 0.25A at the rated voltage of the cable. During the testing process, there is a signal output for both short circuit and open circuit of the sample.

22. The equipment is equipped with the following safety protection devices: power overload, short circuit protection, and control circuit overload protection.

23. Environmental usage conditions:

The ground is flat, well ventilated, and free of flammable, explosive, corrosive gases and dust.

There is no strong electromagnetic radiation source nearby.

Leave appropriate maintenance space around the equipment.

Temperature: 5 ℃~30 ℃

Air pressure: 86-106 kPa.

AC380V/50HZ。

Allowable voltage fluctuation range: 380V ± 10%.

Allowable frequency fluctuation range: 50HZ ± 1%.

Require users to configure corresponding capacity air and power switches for the equipment at the installation site, and this switch must be independent and dedicated for the use of this equipment.

When the equipment is not working, the temperature of the environment should be kept within+0-45 ℃, and the vibration combustion device should be placed outside the combustion chamber.

IIIFire resistance test:

1. Sample:

The sample is a section of the finished product, not less than 1200mm, with 100mm of sheath and cover removed from each end. The wires at both ends of the cable should be electrically connected.

2. Cable support system:

The cable is clamped horizontally at both ends of the cable sheath using a clamp. The middle part of the cable is fixed by two metal rings (spaced 300mm apart), which are grounded together with other metal parts of the device. For unarmored cables with a diameter less than 10mm, or other cables that experience significant displacement during testing, add 3 metal rings, each fixed approximately 150mm from the original metal ring.

3. Continuous detection device:

During the experiment, allow current to pass through all cores of the cable, including one three-phase star connected transformer or three single-phase transformers (or one single-phase transformer if tested as a single core cable), and have sufficient capacity to maintain a maximum allowable leakage current of 3A at the test voltage. Connect a lamp to each core wire at the other end of the cable and load a current of nearly 0.25A at the rated voltage of the cable

4. Heat source and temperature measurement

Heat source: A tubular gas burner with a length of 500mm and a width of 15mm, capable of forcibly supplying methane and dense flames.

Temperature measurement: A 2mm diameter armored thermometer is placed near the inlet, approximately 45mm horizontally and 70mm vertically from the burner.

Test flame temperature and time: (see GBT19216.11)

750 ℃+50 ℃/-0, combustion time 90 minutes

5. Test voltage: adjustable from 200~1000V

4Resistant to mechanical vibrations+Fire resistance test (i.e. impact resistance+fire resistance)：

1. Sample:

The sample is a section of the finished product, not less than 1500mm, with 100mm of sheath and cover removed from each end. The wires at both ends of the cable should be electrically connected.

2. Test ladder and installation

The test ladder consists of a steel frame, approximately 1200 meters long, 600mm high, and a total weight of approximately 18 ± 1kg. It is made of angle steel or stainless steel square tubes with a width of approximately 45mm. Fixed on a rigid bracket using four rubber bushings with a diameter of approximately 32mm and a thickness of 20mm.

3. Continuous detection device:

During the experiment, allow current to pass through all cores of the cable, including one three-phase star connected transformer or three single-phase transformers (or one single-phase transformer if tested as a single core cable), and have sufficient capacity to maintain a maximum allowable leakage current of 3A at the test voltage. Connect a lamp to each core wire at the other end of the cable and load a current of nearly 0.25A at the rated voltage of the cable

4. Heat source and temperature measurement

Heat source: A tubular gas burner with a length of 500mm and a width of 10mm, capable of forcibly supplying methane and dense flames.

Temperature measurement: A non combustible non-metallic heat-resistant plate approximately 900mm in length, 300mm in width, and 9mm in thickness, with a 2mm diameter armored thermometer placed near the inlet, at a horizontal distance of 110 ± 10mm and a vertical distance of 50 ± 10mm from the burner

Test flame temperature and time: (see GBT19216.12)

830 ℃+40 ℃/-0, combustion time 120 minutes

5. Impact generating device

Made of a low carbon steel rod (diameter 25mm/0.1, length 600mm ± 5mm). The longitudinal section of the rod is parallel to the wall and is 200mm higher than the top of the wall. It is divided into two parts, 200mm and 400mm, with the longer part facing the wall. Drop and impact the midpoint of the test ladder at an angle of 60 ° with an interval of 5 minutes ± 10.

6. Test voltage: adjustable from 200 to 1000V.