A brake resistor is a current-limiting component. When a Brake Resistor is connected in a circuit, it limits the amount of current flowing through the branch to which it is connected. If the resistor's resistance is close to zero ohms (For example, if there is a large-section wire between two points), then this resistor will not hinder the current. The circuit connected in series with this resistor will be short-circuited, causing the current to be infinite.

If the resistance of a resistor is infinite or very high, the circuit with the resistor in series can be considered an open circuit with zero current. Resistors commonly used in industry fall somewhere between these two extremes; they have a certain resistance and can allow a certain amount of current, but the current is not as high as a short circuit.

The current-limiting effect of a resistor is similar to placing a small-diameter pipe between two larger-diameter pipes, restricting the flow of water.

Brake Resistors are the most numerous components in electrical equipment, but they are not the ones with the highest failure rate. The most common failure mode of a resistor is an open circuit, while increased resistance is less common and decreased resistance is very rare. Common types include carbon film resistors, metal film resistors, wirewound resistors, and fused resistors. The first two are the most widely used, and their failure characteristics are: First, low resistance values (below 100Ω) and high resistance values (above 100kΩ) have higher failure rates, while medium resistance values (such as hundreds of ohms to tens of kiloohms) are very Fewer failures; secondly, low-value resistors often show signs of burning and blackening when they fail, making them easily noticeable, while high-value resistors rarely show any signs of damage. Wirewound resistors are generally used for high current limits and have relatively low resistance values. When cylindrical wirewound resistors fail, some may turn black or develop surface peeling and cracks, while others may show no signs of damage. Cement resistors are a type of wirewound resistor, and when they fail, they may crack, but other than that, there are no obvious signs.

When the fuse resistor fails, some may have a piece of the surface blown off, and some may not show any signs, but they will never be burned or blackened. For more questions, please contact ZENITHSUN Brake Resistor Factory!