With the advent of new technologies and new sources of renewable energy, the quality of the power supply has become a very important element for the proper functioning of electrical and electronic equipment that requires power supply with constant and unperturbed parameters. For these reasons, Power Quality is characterized by an increasing importance both in the industrial sector and in the service sector.
The problem of voltage variation
The variation of the supply voltage is defined as an increase or a decrease in the amplitude of the voltage, with respect to its nominal value, which can be caused by variations in input power, variations in loads (e.g. starting of motors, maneuvers in the system) or from system failures.
The phenomenon of voltage variation is one of the main Power Quality problems as it can cause damage to electrical / electronic equipment as well as significant inefficiencies.
The most recurrent problems due to the voltage variation can be shutdowns and / or anomalies in the processes / equipment, interventions of the power electronics protections, aging of the system components, malfunctions of the electronic devices etc.
The amplitude of the supply voltage can therefore be characterized by both increases (overvoltages) and reductions (undervoltages) that occur randomly with a duration that varies over time in relation to the conditions of the system and electrical distribution.
To solve problems related to voltage variations, IREM offers a wide range of equipment specially designed to guarantee users a perfectly stabilized electrical voltage: MINISTAB and STEROSTAB Voltage Stabilisers.
The following figures provide a visual indication of the voltage waveform that can be present on an electrical system affected by voltage variation problems and the voltage waveform stabilized thanks to the use of the IREM Voltage Stabiliser:
IREM’S SOLUTION TO VOLTAGE VARIATIONS:
MINISTAB AND STEROSTAB
IREM Ministab and Sterostab Voltage Stabilisers are the most reliable solution to problems related to voltage variations in the electric network. The electric energy producers generate a correct voltage. However, failures on the distribution lines, atmospheric discharges, continuous load variations and disturbances generated by the users make it impossible to guarantee always a steady voltage within the tolerance bandwidth stipulated in the supply contract. Very often this tolerance is insufficient for more sensitive equipment. Other times the mains voltage reaches levels that exceed the foreseen rated value by 15, 20 or even 30%. Increasingly, there is a reduction in the Power Quality level of the electrical energy made available to the end user. IREM Ministab and Sterostab voltage stabilisers guarantee users with perfectly regulated voltage.
