DEVELOPMENT OF THE SOCKET MODULE OF THE ELECTRICAL NETWORK
Abstract
Electric current and the consequences of its action under appropriate conditions become a powerful source of ignition of the combustible medium. According to statistics, every year in Ukraine there are more than 70 thousand fires, of which 11.5-13 thousand from electrical installations. To minimize the negative effects of short circuits and overloads, electrical networks are equipped with appropriate protection devices, such as fuses, circuit breakers, thermal relays, etc. At the same time, the detection of emergencies due to the high values of transient resistance remains one of the most difficult issues. The presence of a large transient resistance at the place of switching leads to excessive local heating, in which there are no significant changes in the controlled characteristics of the electric current in the circuit. As a result, the protection devices do not work. Among the devices in which there may be significant transitional supports, one of the most common are sockets and plugs. That is why the prevention of fires and accidents due to overheating of the plug connection is an urgent task.
To prevent dangerous heat dissipation, it is recommended to equip the electrical outlet with temperature fuses, which will operate when the permissible connection temperature is exceeded and will stop further heating by opening the electrical circuit.
In order to select the optimal characteristics of temperature fuses, the conditions are determined under which the normal operation of the plug-socket connection will be ensured for long maximum allowable loads and the electrical circuit will open when the temperature limit is reached.
The design of an electrical outlet with thermal protection is proposed and it is established that temperature fuses BF99 or BF104 can be used to create an electrical outlet with thermal protection, as their characteristics satisfy all three defined conditions. The obtained results can be used in the production of electrical outlets.
