keskijänniteasema

A keskijänniteasema, or medium voltage substation, is a crucial component within an electrical power distribution network. Its primary function is to transform electricity from a higher voltage level to a lower voltage level suitable for distribution to end-users, such as homes and businesses. These substations typically operate within the voltage range of 10 kilovolts (kV) to 36 kV, bridging the gap between high-voltage transmission lines and the lower voltage networks used for final delivery.

The key equipment found in a keskijänniteasema includes transformers, which reduce the voltage, and switchgear. Switchgear encompasses circuit breakers, disconnectors, and fuses that are used to control, protect, and isolate electrical equipment. These devices ensure the safe and reliable operation of the power grid by allowing sections to be disconnected for maintenance or in the event of a fault. Additionally, protective relays are often installed to detect abnormal conditions like overloads or short circuits and initiate the operation of circuit breakers to prevent damage to the network and connected equipment.

Keskijänniteasemat are strategically located throughout the distribution system to efficiently deliver power to various areas. They are essential for maintaining voltage stability and ensuring a continuous and reliable supply of electricity to consumers. The design and capacity of a keskijänniteasema are determined by the anticipated load demand of the area it serves and the voltage levels of the incoming and outgoing power lines.