4 points you need to pay attention to when using RCBO

When it comes to electrical safety, the importance of using an RCBO (Residual Current Circuit Breaker with Overcurrent Protection) cannot be overstated. This important piece of equipment is designed to protect personnel from electrical shock in the event of an equipment leakage failure, ensuring personal safety in residential and commercial environments. With its overload and short circuit protection features, RCBOs are important components in any electrical system. However, there are several key points to keep in mind when using RCBO to ensure its optimal performance and effectiveness.

First of all, it is important to pay attention to the rated residual operating current value of RCBO. When a residual current operating protector is installed between general protection and final protection, its rated residual operating current value should be within the range of the upper and lower level residual current operating protectors. The step difference should typically be between 1.2 and 2.5 times to ensure smooth and efficient operation of the RCBO within the electrical system.

In addition to the rated residual operating current value, it is also important to consider the maximum rated residual operating current of the total protection. In non-rainy season, the maximum rated residual operating current should not exceed 75-100mA, and in rainy season, it should not exceed 200-300mA. For household applications, the operating current value of the residual current operating protector should not be greater than 30mA to provide direct contact protection for individuals. In addition, when RCBO is used for mobile power equipment and temporary power equipment, its operating current value should also be 30mA.

Another important point to consider when using RCBO is the proper installation and grounding of the equipment. For general protection of low-voltage power grids, the neutral point of the transformer should be directly connected to ground. It is crucial to ensure that the grid neutral conductor is not double grounded and maintains the same insulation level as the phase conductors. In addition, the installation method of the residual current action protector should prevent the neutral line and phase line from being shared with other circuits to ensure the normal operation of the RCBO.

Finally, electrical load distribution should be carefully considered when using RCBO, especially single-phase loads. It is important to evenly distribute lighting and other single-phase electrical loads on three-phase power lines. If the deviation is large, adjustments should be made to make the leakage currents of each phase equal to ensure the best performance of the RCBO. Additionally, when the low voltage lines are geographical lines, the three phases should be of similar length to provide a balanced distribution of the electrical load.

In summary, proper use of RCBOs is critical to electrical safety and protection. By paying attention to the rated residual operating current value, maximum rated residual operating current, installation and grounding, and distribution of electrical loads, individuals can ensure optimal performance of the RCBO in their electrical system. With their ability to protect against electrical shock and equipment failure, RCBOs are a critical component in maintaining a safe and reliable electrical infrastructure.