POWER QUALITY. High frequency disturbances

High frequency disturbances are caused by the sparks generated in the AC commutator motors, the “corona effect” on the high voltage lines, the igniters of luminous signs and burners, and by the magnetic fields irradiated by radio and TV stations. Line disturbances,...

POWER QUALITY. Variable Harmonics

The voltage and current harmonics superimposed on the fundamental have combined effects on the equipment and devices connected to the electrical network. Some non-linear loads determine a harmonic content distributed over a very wide spectrum, therefore variable both...

POWER QUALITY. Harmonics in electric Power Supply

The harmonics in electrical systems are electrical currents or sinusoidal electrical voltages that have a frequency equal to an integer multiple of the frequency of the distribution system, called the fundamental frequency. By overlapping the Fundamental Current and...

POWER QUALITY. Voltage imbalances

Voltage imbalances are one of the most common Power Quality problems in three-phase electrical networks. Being often overlooked, they can cause serious damage to electrical and electronic equipment. Voltage unbalance can occur at any point of the three-phase...

New IREM catalogue Power Quality 2020

The news of IREM Power Quality Line are illustrated in the new 2020 catalogue. The POWER QUALITY Line gathers IREM products dedicated to the protection of electrical utilities and energy saving: voltage stabilizers, line conditioners, voltage optimisers, integrated...

POWER QUALITY. How to protect users from power failure

One of the most important factors in Power Quality is the continuity of the electricity supply service and therefore the lack of interruptions in the electricity supply. Although the distribution companies pay particular attention to the continuity of the electricity...