Made in Italy. Since 1947. MASTER IN POWER CONTROL

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Power Quality I IREM

IREM I Power Quality IREM: POSITIVE ENERGY, WITHOUT INTERRUPTION. SINCE 1947. IREM is an Italian company specialised in designing and manufacturing electromechanical and electronic equipment for mains power control and energy generation. IREM offer is divided into three product lines: Power Quality: Power quality and Energy Saving; Hydro Power: Hydroelectric turbines, Distribution and Regulation Switchboards; Power Lighting: Power supplies and Igniters for discharge lamps for professional applications. Over 70 years of experience, two production plants, a philosophy based on “quality upgrading”...

Power Quality I IREM IREM is an Italian company, founded in 1947, worldwide leader in design and manufacture of equipment for the control and generation of electric energy. IREM products are used in various sectors such as: Power Quality, Energy Saving, Hydroelectric and Professional Lighting. Its brilliant founder, Mario Celso, as a boy passionate of electrical engineering and cinema, in the late 40’s succeeded to realize his childhood dream creating the first electromechanical rectifier for carbon arcs used in cinema projection. From this first rectifier, a comprehensive line of products dedicated...

IREM I Power Quality WARRANTY 5-year extended warranty for voltage stabilizers and power conditioners with IP21 protection degree. The criteria used to size the electrical and electronic components of all IREM products guarantee high reliability. The declared performances always refer to the most severe and restrictive conditions of use: continuous duty at nominal power with minimum input voltage and maximum ambient temperature. NATURAL CONVECTION In equipment with IP21 degree of protection, cooling is obtained only by natural convection in air. The total absence of fans (IREM fan-free system)...

Power Quality I IREM 7 Power Quality I IREM 7 SUMMARY 8 POWER QUALITY 14 VOLTAGE STABILISERS MINISTAB AND STEROSTAB 1PH and 3PH electrodynamic voltage stabilisers rated from 1 to 8000 kVA 36 LINE CONDITIONERS MINISTATIC AND STEROGUARD 1PH and 3PH electronic and electrodynamic versions 42 INTEGRATED POWER SUPPLIES AI - AO Specially designed for telecom applications 48 ISOLATION TRANSFORMERS IT Specially designed for telecom applications 52 PASSIVE FILTERS PHF Specific for complex process activities 56 ACTIVE FILTERS AHF Specific for VFD (AC motor drive) 60 UNINTERRUPTIBLE POWER SYSTEMS MINIPOWER...

IREM I Power Quality POWER QUALITY There is no formal (or univocal, academic, etc.) definition of the term “Power Quality”, however it is customary to refer to “Power Quality” such as the suitability of electricity to power the user appliances. “Power Quality” is intrinsically linked to the interaction between the electrical system power supply and loads; the term refers both to the voltage quality and the current quality. Any deviation from the ideal power conditions manifested in voltage, current or frequency deviations – which is the cause of failure or malfunction of a powered equipment –...

Power Quality I IREM PROTECTION AGAINST MAINS POWER FAULTS A wide range of devices is available to improve the power quality and ensure the best protection to professional equipment highly sensitive to electrical disturbances. As a matter of fact, any equipment needs a correct powering to ensure its performance. When this condition is not complied with, there are failures, errors and premature ageing. To protect sensitive equipment, it is possible to have recourse to several devices which, depending on their characteristics, complexity and cost, ensure different levels of efficacy. The choice...

IREM I Power Quality THE PROBLEM SYMMETRICAL VOLTAGE VARIATIONS Being subject to continual load variations, distribution lines are unable to supply perfectly even voltage levels. This is why any electrical equipment is built to accept shifts of at least ±5% as to the nominal value. As a matter of fact, electricity boards contractually provide for fluctuations up to ±10%. However, this limit is often exceeded due to “slow variations” (voltage drops caused by under-dimensioned lines and overloads), “over-voltages” (considerable increases of the mains voltage value arising when industries drastically...

Power Quality I IREM HARMONIC DISTORTIONS 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 the Fundamental Voltage respectively, they cause the distortion of the waveform. When powering an electrical equipment in alternating current, it is expected that since the voltage has a sinusoidal shape, the current absorbed by the load is also sinusoidal, this is true only for some types...

IREM I Power Quality THE SOLUTION VOLTAGE STABILISERS Suitable for any type of load, they deliver a “true RMS” stabilised output voltage, even when strong harmonic distortions are present on the line. MINISTAB - STEROSTAB M Single-phase voltage stabilisers. MINISTAB - STEROSTAB T Three-phase voltage stabilisers with common regulation of the 3 phases. MINISTAB - STEROSTAB Y Three-phase voltage stabilisers with independent regulation of each phase. ELECTRONIC LINE CONDITIONERS MINISTATIC These models offer a high protection level for sensitive electronic equipment connected to lines disturbed by...

Power Quality I IREM PASSIVE FILTERS They attenuate the harmonic content poured into the network by some types of user devices. Passive filters are characterized by the presence of only passive elements such as capacitances, inductances and resistances, they are simple and robust in construction and do not require commissioning and maintenance operations. They have the operating limit of working with a certain number of harmonics classically associated with the actuation of frequency changers (VFD), the most significant are the fifth (250 Hz), the seventh (350 Hz), the eleventh (550 Hz ), the...