The glow wire test apparatus is used to determine the fire hazard of electrical parts and components that are subject to malfunctions such as overload, short circuit, and also bad connection, or others that could ignite and spread the flame to the rest of the product.
The glow wire test apparatus simulates overloaded resistance or other ignition source and applies heat to the sample for a short time, and simulates as closely as possible the actual effects occurring in practice.
The supplied thermocouple is equipped with a temperature controller that accurately measures the temperature of the glow wire. The electrical circuit of the control unit is fully protected by fuses and miniature circuit breaker.
The International Electricity Commission (IEC) established the glow wire test method in 2001 because existing test methods did not cover all sources of ignition. Specifically, the glow wire test apparatus is used to simulate the effects of heat that may occur in the event of an electrical equipment malfunction due to an overloaded connection or an overheating component.
How to make the test:
• You will need to place the sample in the Glow Wire Test Apparatus
• Place a piece of tissue paper (tissue paper) on timber that is in the box containment of waste and flames below the filament.
• Turn on the equipment.
• Move the sample holder to a position where the temperature of the filament is not transmitted to the sample. To do this, going to the forward / back screen indicates that the operator is in the MANUAL mode options.
• Press the START button, and the equipment will automatically raise and stabilize the filament temperature to 960 ºC (or the temperature that you set). It is considered stable if, during a period of 60 seconds there is a greater variation in temperature to 5 ºC.
• After that the sample holder automatically advances to make contact with the filament, will begin a timed to the display, 30 sec (or the time that you set), and withdrawn immediately, restarting a new count of 30 sec (or the time that you set), for evaluation. In this process, the equipment will allow maximum penetration of the filament into the 7 mm sample.
• During the trial the operator must pay attention to two events:
• If there are flames, press the start button. The equipment is automatically stored in the memory and to display the time at which the test started the flame (TF or start time of the flame).
• In addition, you should see the metric ruler behind the wire to see who is riding in the flame.
• After the test you will hear a sound ‘beep’ to indicate that the test has finished and you can see on the display ‘Test Finished’.
• If it is necessary to stop the test for any reason, press the reset button ’Rst’, which returned to start the control program and stop the advance of any function being performed.
The equipment also allows a manual test in which the operator must manually turn up the heating and, when it has reached the desired temperature, press the start button. After that, you can see a timer (contact time) on the screen (30 seconds or as long as you have set).
After this time will be deleted automatically restarting a new account of 30 seconds for later evaluation (observation time). During this process, the equipment will allow maximum penetration of the filament in the 7 mm +/- 0.5 mm sample (you can modify it by changing the stopping time of the feed motor).