faasijuhtmed

Faasijuhtmed, often translated as phase conductors, are the conductors in a three-phase electrical power system that carry alternating current. In a balanced three-phase system, there are typically three such conductors, each carrying an alternating current that is offset in phase by 120 degrees from the other two. This phase offset is crucial for efficient power transmission and the operation of three-phase motors, which do not require a starting capacitor like single-phase motors.

The voltage on a faasijuhtme relative to the neutral conductor (if present) is known as phase voltage, while the voltage between two faasijuhtmed is called line voltage. The line voltage is approximately 1.732 times (the square root of 3) the phase voltage in a wye (star) connected system. Faasijuhtmed are usually made of copper or aluminum due to their high conductivity and are insulated to prevent electrical shorts and protect against environmental factors.

In many distribution systems, the neutral conductor is also present and grounded. However, in some configurations, particularly for high-voltage transmission or certain industrial applications, a three-wire system without a neutral conductor is used. The color coding of faasijuhtmed varies by region and electrical standard to ensure safety and proper identification during installation and maintenance. Understanding the role and characteristics of faasijuhtmed is fundamental to comprehending the principles of three-phase power distribution.