It’s common to experience fluctuations in voltage within our electrical networks, with voltage levels often reaching 260, 280, 300, or even 380 volts. These fluctuations can lead to malfunctions in electronic devices, damage to household appliances, and even fire hazards.
Causes of High Voltage
One surprising cause of high voltage in the electrical network is actually low voltage experienced by consumers far from the transformer substation. In such cases, electricity providers sometimes intentionally increase the output voltage of the substation to ensure adequate current for distant consumers. As a result, consumers closer to the substation experience higher voltages. If the substation’s output voltage were adjusted to a normal level (220 volts), voltage would drop significantly during peak usage periods, like summer or weekends. Therefore, electricity providers often set the transformer to a higher voltage.
Another major cause of high voltage is an imbalance in the phase loads. When consumers are connected to the network without a proper plan or project, or when the load on different phases changes over time, it can lead to an imbalance. This imbalance can result in lower voltage on one phase and higher voltage on another.
A third cause of high voltage is faults in the transmission lines and internal wiring. Two primary causes include a neutral wire break and the intrusion of high-voltage current into standard networks. The latter is less common but can occur during severe weather, such as hurricanes, when high-voltage lines from transportation systems (like trams or trolleybuses) may come into contact with residential lines.
When the neutral wire in a building’s internal network fails, the voltage across different phases can become unbalanced. If a building uses two phases, and the neutral wire is disconnected, the voltage on the phase with a lighter load will increase, while the voltage on the phase with a heavier load will decrease. This can lead to a significant voltage imbalance, potentially damaging electrical devices and causing fires.
Dangers of High Voltage
High voltage in the electrical network can damage electrical devices, causing overheating, wear, and even failure. Electronic equipment and electromechanical devices are particularly sensitive to high voltage. Additionally, high voltage poses a significant fire risk.
Protecting Yourself from High Voltage
To protect your electrical system from voltage surges and spikes, consider using voltage stabilizers. These devices can be installed for an entire apartment, house, or individual appliance. They come in various sizes and types, including wall-mounted and floor-standing models.
When choosing a voltage stabilizer, it’s essential to consider the total power consumption of the devices you plan to connect. As a general rule, it’s advisable to select a stabilizer with a capacity that is at least 20% higher than the total power consumption. Additionally, the stabilizer’s input voltage range should be compatible with the expected voltage fluctuations in your area.
In conclusion, understanding the causes of high voltage in the electrical network and taking appropriate measures, such as using voltage stabilizers, can help protect your electrical appliances and ensure the safety of your home.
