Petrol is counted among the most highly flammable liquids. On the other hand, petrol evaporates within a few seconds as soon as it comes into the air, while on the other hand, it catches fire even due to a small spark. The fire caused by petrol is so intense that it is very difficult to control it. But have you ever wondered why the motors installed at petrol pumps do not cause fire? While the motors of the house burn. We are talking about those motors, which are used to fill fuel in vehicles. Perhaps such a question might not have come to your mind before, but a user has asked this question on the social media website Quora.
The user has written that can you tell from which material the motor of the petrol pump is made, due to which it does not catch fire, whereas petrol is inflammable? The user’s name is Animesh Kumar Sinha. According to Quora profile, Animesh is an electrical engineer in Indian Railways. However, he himself has answered this question, as well as the people present on this social site have also expressed their views. A user named Anil Patel has written in his comment that there are two types of motors. Brush motor and brushless motor. Brush motor has high rpm and small size, which is used in portable machines. Whereas, brushless motors have low rpm, but their size is large. Both have the same connection, but in a brushless motor only the rotor moves. The connection of the coil remains fixed, due to which no spark comes out. However, the exact answer has been given by Animesh Kumar Sinha.
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Along with asking questions, Animesh has also given answers. According to him, the motor which fills petrol or diesel in the vehicles at the petrol pump is flame proof, that is, without flame or spark. In such a situation, when there is no spark, how will the fire start? Actually, all this happens because of the design of the motor. Their cover is of special design which does not allow the internal spark to come out. Also, the motor remains more balanced, due to which less spark is emitted. Along with this, the winding of electrical wires is made completely solid through VPI technology (Vacuum Pressure Impregnation) so that moisture etc. cannot penetrate it. These motors are also water resistant, so there is no fear of short-circuit.
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FIRST PUBLISHED: November 29, 2023, 12:28