Overheating is a phenomenon of rising temperatures in electrical circuits (or part of the circuit). Excess heat causes potential damage to the circuit components, and may cause fire, explosion, or injury. Damage caused by overheating is generally irreversible; that is the only way to fix is ​​to replace some components.
Video Overheating (electricity)
Cause
At too hot temperatures, the part temperature rises above the operating temperature. Overheating can happen
- if heat is produced in an amount that is more than expected (as in short-circuit cases, or applying more voltage than is assessed), or
- if the heat dissipation is bad, so the normally produced heat waste does not flow properly.
Overheating can be caused by accidental errors of a circuit (such as a short circuit or split gap), or it may be caused by faulty design or manufacture (such as the lack of a proper heat dissipation system).
Because of the heat accumulation, the system achieves a balance of heat accumulation vs. dissipation, at a temperature much higher than expected.
Maps Overheating (electricity)
Precautions
Use of circuit breaker or fuse
Circuit breakers are placed in different parts of the circuit (in series to the current path that will affect). If more current than expected passes through the circuit breaker, the circuit breaker "opens" the circuit and stops all currents. Fuses are a kind of widely used circuit breaker, which involves the direct effect of Joule-overheating. The fuses are always placed in series with the current path that will affect. Depending on the work, inside the fuse, there is a narrow wire cable (often a hair line) of a definite material, in the fuse. When more than expected currents flow through the fuse; overheats the fuse cable (melt) and "open" the circuit. In some gadgets, more than one
Use of heat recovery system
Many ventilator holes or slits are stored in the toolbox. Heat sinks (metal objects that emit heat) are attached with some parts of the circuit that produce more heat/are more susceptible to heat. often, fans are required. Some high-voltage instruments continue to sink in the oil. In some cases, to remove unwanted heat, some cooling systems such as heat sinks or heat-pumps may be required.
Control in design-circuit
Sometimes special circuits are built for the purpose of sensing temperature or voltage status, and then controlling these variables. In this circuit, Thermistors (resistors are temperature dependent), VDR (voltage dependent resistor), thermostat (which turns off the circuit at high temperature), Sensor (like infrared thermometer), etc. Used to modify the current under various conditions such as circuit temperature and input voltage.
The exact creation
Source of the article : Wikipedia
0 Comments