China NBC-4324 glowing wire test chamber stainless steel housing

Parts of electrical and electronic equipment may be exposed to excessive thermal stress due to electricity, and their deterioration may reduce the safety performance of the equipment. These parts should not be unduly affected by the heat and fire generated within the equipment. Parts of insulation or other solid combustible materials inside equipment that tend to spread flames may ignite due to glow wires or hot components. Ignition occurs under certain conditions, such as fault current flowing through conductors, overloading of components and hot components with poor contact. This tester is designed to simulate heat sources or ignition sources such as glowing components or overload resistors under fault or overload conditions. This tester is designed to simulate heat sources or ignition sources such as glowing components or overload resistors under fault or overload conditions. Thermal stress caused in a short period of time is used to evaluate the fire hazard of the product. It is suitable for conducting fire hazard tests and combustion performance tests on electrical and electronic products, household appliances and their materials. This tester complies with IEC60695-2-10/11/12/13, IEC60669-1, 1EC60884-1, UL1598, GB5169.10, GB5169.11 and GB4706.1. Design and manufacture in accordance with the relevant provisions specified in "Safety of Household and Similar Electrical Appliances Part 1: General Requirements".

Principle

The test chamber is divided into two parts: the left part is the glowing combustion chamber and the right part is the electrical control room. After the sample is loaded into the sample fixture, it is driven by a motor and can travel forward and backward, and is automatically controlled during the test process. The glow wire is fixed, and the sample trolley is moved to the right onto the glow wire head, and the trolley is pulled with a weight to keep the applied pressure IN, and a limit device is installed to limit the intrusion depth to 7mm. The glow wire application time Ta (T1) is controlled by the digital time relay preset. The flame ignition time Ti (T2) is measured with a digital time relay and controlled by a push button switch. The flame extinguishing time Te (T3) is measured by a digital time relay and controlled by a push button switch. The electrical control system controls the glowing current to change the glowing temperature, and uses temperature control instruments to accurately control the glowing wire temperature. The K-type armored thermocouple has high precision and reliability.

Electrical control panel

1) Testing machine name

2)Ammeter-indicates the glow wire current

3) Timer T1: Test (heating) time (Ta) - timer for burning the sample

4) Timer T2: glowing ignition time (Ti) - sample flame ignition time

5) Extinguishing time T3 (Te) - press this timer when the sample flame goes out

6) Temperature display instrument - displays the set temperature and glowing temperature

7) Heating current regulator - adjust the heating current

8) Heating start switch (T-rise) - Press this switch button to adjust the current

9) Ignition timing stop switch (T2 stop) - Press this switch button to stop timing at T2 and start timing at T3

10) Heating stop switch (T-stop) - Press this switch button to stop heating

11) Combustion timing stop switch (T3 stop) - Press this switch button to stop T3 timing

12) Power switch-press this switch button to turn on the glow wire testing machine

13) Operation start-press this switch button and the sample trolley starts to move

14) Test start-press this switch button to enter the test-ready state

15) Test stop - press this switch button to enter the test end state

16)Lighting switch - control lighting

17) Fan switch-controls the fan to extract exhaust gas

18) Operation stop - press this switch button to stop the sample car from moving

Glow wire structural components

1) Power drive device

2) Glow wire probe

3) Sample trolley

4) Weight pulley

5)1N weight

6)Limit switch

Precautions

When the glow wire heats up, please close the door and observe to avoid burns.

The power supply should use a three-pole socket with a ground wire to ensure reliable grounding.

Pay attention to protect the thermocouple and glow wire of the temperature controller. Be careful not to damage the top of the glow wire when cleaning it

Thermocouples are consumables and are not covered by the warranty.

Be sure to pay attention to the polarity when replacing the thermocouple.

Do not turn on the lighting switch and exhaust switch during the burning process

If you find that the burning flame of hot materials is too large, please immediately turn off the power switch, unplug the power cord, and immediately use a fire extinguisher to put out the fire.

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[Note] Because the manufacturer's packaging may be updated or upgraded, the detailed packaging list shall be subject to the latest standard configuration of the manufacturer.