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POWER QUALITY
POWER PROTECTION AND ENERGY SAVING

IREM PROPOSAL

AUTOMATIC VOLTAGE STABILIZERS IREM

VOLTAGE STABILISERS

Ministab and Sterostab
IREM LINE CONDITIONERS

LINE CONDITIONERS

Ministatic and Steroguard

UNINTERRUPTIBLE POWER SYSTEMS

Minipower and Steropower
AUTOMATIC VOLTAGE OPTIMISERS

VOLTAGE OPTIMISERS

Ecostab – Ecobuck

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 – constitutes a problem of “Power Quality”. Poor Power Quality inevitably causes problems to motors, drive devices, lighting systems and computer networks.
Many users of process plants and equipment underestimate the effects of poor “Power Quality”, which in terms of downtime, lack of productivity, data loss and damages to the equipment can be truly remarkable.
A reduced “Power Quality” can also give rise to unexpected high electricity costs and cause the application of penalties due to power supply network pollution.
Users with internal power quality problems, responsible for the network “pollution”, end up damaging other users connected to the network node and adversely affect the ability of substations to meet the quality requirements of the power supply.
The interdependence between the different systems only increases the vulnerability of the equipment to Power Quality problems, every plant and every company also have strategic systems for their business and any Power Quality problem can determine their interruption of operation at any time.

PROBLEM: MAINS FAULT

SOLUTION: IREM

SYMMETRICAL VOLTAGE VARIATIONS - Power Quality IREM
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 cut down their energy consumption), “fast variations” (drops caused by the connection of equipment such as: discharge lamps, punching machines, electric motors, etc.).

VOLTAGE STABILISERS

T series

ASYMMETRICAL VOLTAGE VARIATIONS - Power Quality IREM
ASYMMETRICAL VOLTAGE VARIATIONS

Asymmetry, otherwise called voltage imbalance, is a problem affecting three-phase networks, it can cause serious damage to equipment, but is often overlooked. For example, a 2.3% voltage imbalance on a 400 V motor results in a current imbalance of almost 18%, causing a temperature rise of 30 ° C.

VOLTAGE STABILISERS

Y series – M series

VOLTAGE SPIKES - Power Quality IREM
VOLTAGE SPIKES

These are very brief pulse disturbances extremely dangerous for the most sensitive equipment since the voltage values may reach thousands of volts. They are caused by several events, like e.g. switching of high voltage lines, connection of power factor correction capacitors, lightning, disconnection of loads with high reactive powers, and also by lower power loads such as photocopy machines and air conditioners connected to the same line powering the sensitive equipment. Spikes are not detectable by means of an ordinary voltmeter due to their short duration; however they are one of the main causes of failures and malfunctions.

ELECTRONIC LINE CONDITIONERS
INTEGRATED POWER SUPPLIES
ISOLATION TRANSFORMERS
HIGH FREQUENCY DISTURBANCES - Power Quality IREM
HIGH FREQUENCY DISTURBANCES

They are very common and easily detected by anyone watching TV. They are the cause of the “snowstorm” effect and those fastidious lines that sometimes appear on the screen. They 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, also known as HF noise, do not generally create problems on electromechanical equipment, but can often damage a sensitive electronic equipment.

ELECTRONIC LINE CONDITIONERS
INTEGRATED POWER SUPPLIES
ISOLATION TRANSFORMERS
HARMONIC DISTORTIONS - Power Quality 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 of loads or linear loads, but not for non-linear loads in which the relationship between current and voltage is no longer represented by a straight line. The extent of the deformation is defined by a parameter called total harmonic distortion of current THDi%. The drawbacks caused by the harmonics are manifold and include the malfunction of equipment, the increase in currents in the circuits, the increase in losses, noise frequency interference etc.

PASSIVE FILTERS
Armoniche variabili - Power Quality IREM
VARIABLE HARMONICS

In addition to the above already described, some non-linear loads determine a harmonic content distributed over a very wide spectrum, therefore variable both in the harmonic order and in intensity.
The drawbacks are even wider and lead to a variety of instantaneous and longterm effects on both electrical equipment and systems.

ACTIVE FILTERS
BLACKOUTS - Power Quality IREM
BLACKOUTS

This is the most obvious event (though less frequent) because everybody perceives it. It may happen accidentally on production plants or distribution lines, or it can be programmed to reduce energy consumption.
There are also micro-interruptions, which may last between microseconds and a few tenths of milliseconds, caused by short circuits or line switching. These faults are not noticed by electromechanical equipment, but they can cause damage to an electronic equipment. The switching power supplies used in almost any electronic equipment can normally compensate interruptions lasting a few milliseconds, but a longer blackout can cause loss of data, program cancellations and system failures.

UNINTERRUPTIBLE POWER SYSTEMS

UPS

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 – constitutes a problem of “Power Quality”. Poor Power Quality inevitably causes problems to motors, drive devices, lighting systems and computer networks.
Many users of process plants and equipment underestimate the effects of poor “Power Quality”, which in terms of downtime, lack of productivity, data loss and damages to the equipment can be truly remarkable.
A reduced “Power Quality” can also give rise to unexpected high electricity costs and cause the application of penalties due to power supply network pollution.
Users with internal power quality problems, responsible for the network “pollution”, end up damaging other users connected to the network node and adversely affect the ability of substations to meet the quality requirements of the power supply.
The interdependence between the different systems only increases the vulnerability of the equipment to Power Quality problems, every plant and every company also have strategic systems for their business and any Power Quality problem can determine their interruption of operation at any time.

Power Quality IREM: problem and solution

MINISTAB STEROSTAB
VOLTAGE STABILISERS

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.

MINISTATIC AND STEROGUARD
LINE CONDITIONERS

Ministatic and Steroguard IREM Line Conditioners have been designed to provide the highest level of protection to electrical appliances connected to distribution lines disturbed by sudden voltage variations, HF noises and spikes.
Statistically, the phenomena that reduce the power quality of the energy supplied by the network represent more than 95% of electric anomalies that could be the cause of breakdowns and poor operation of any kind of appliance connected to distribution lines.
IREM Line Conditioners guarantee maximum protection to users subject to particular power grid anomalies and drastically increase the level of power quality.

AI – AO
INTEGRATED POWER SUPPLIES

The supplying of radio and TV radio repeaters has always entailed problems and requirements that are difficult to solve:
the most important among them are safety and continuity of operation.
IREM integrated power supplies series AI can meet the particular needs of the power supply of the telecommunications stations.

IT
ISOLATION TRANSFORMERS

IREM Isolation Transformers IT series have been expressly designed to be used in the telecommunications sector. The supply of telecommunication plants has always entailed several problems and specific requirements difficult to meet. The difficulty of reaching the installation sites for service purposes, the exposure to atmospheric discharges and the length of electric lines with consequent voltage drops represent critical elements that require the use of equipment expressly dedicated DESIGNED to this sector.

PHF
PASSIVE FILTERS

The PHF series IREM passive filters are characterized by a high capacity to attenuate harmonic disturbances and are designed to be applied in systems where current harmonic distortion must be reduced within defined limits.
The use of passive filters contributes to reduce the thermal and electrical overload caused by harmonic currents in installations that include variable speed motor drives, UPS, power rectifiers and other non-linear three-phase loads.
Typical applications include loads present in air conditioning, water treatment, oil sector and industrial automation processes in general.

AHF
ACTIVE FILTERS

The IREM active filters AHF series, also known as “active harmonic compensators”, eliminate harmonics through the generation of a reverse waveform that compensate for distortion.
The active filters of the AHF series ensure optimal suppression of harmonics regardless of the number of loads and their usage profile. These filters, installed in parallel to the network, are sized to eliminate a specified amount of harmonic current from the system.
Typical applications include loads present in complex industrial plants; in melting, rolling mill and welding plants; in the oil and gas sector; in generation plants, in commercial and residential buildings, in tunnel ventilation systems and in data processing centers..

MINIPOWER AND STEROPOWER
UNINTERRUPTIBLE POWER SYSTEMS

Minipower and Steropower are double-conversion uninterruptible power supply units ON Line, engineered to ensure highest level of protection for:

  • high-quality machines that manage processes that, if interrupted, would result in considerable damage and/or risks;
  • sensitive electronic equipment used in an industrial environment where, apart from power failure, temporary voltage fluctuations and strong harmonic distortions can occur.

These UPS are therefore particularly suitable for protecting and guaranteeing maximum reliability for “critical mission” devices such as: electromedical equipment, IT systems, telecommunications systems, IT networks, IT applications, industrial automation, and all critical systems in general.

ECOSTAB – ECOBUCK
VOLTAGE OPTIMISERS

IREM Ecostab Voltage Optimiser is a product dedicated to Power Quality and Energy Saving.
Voltage optimization is an energy-saving technology that, by operating through systematic and controlled reduction of the grid voltage, reduces the absorption of active and reactive power from the network.
The average voltage value of the distribution networks is often higher than the ideal operating value for most electrical equipment.
Ecostab is the Energy Economizer which, by exploiting the principle of voltage
optimization, increases the level of power quality and produces energy savings measured and quantified
according to the international reference standard.

HIGHLIGHTS

WARRANTY

5-year extended warranty for voltage stabilizers and power conditioners with IP21 protection degree.

RELIABILITY

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) significantly increases the reliability of the product by avoiding the use of filters that require constant maintenance.

FIT & FORGET

IREM products are characterized by long life, absence of degradation of performance over time and reduced need for maintenance, thanks to the robust construction and the high quality of the materials used, which determines an extremely high reliability (MTBF).

WIDE RANGE

Single-phase and three-phase voltage stabilizers with powers between 1kVA and 8000 kVA. Voltage range from 110 V to 500 V. All voltage stabilizers are available in symmetric configuration ±10%, ±15%, ±20%, ±25%, ±30% and in asymmetrical configuration -35% +15%. Other configurations are possible on request.

TAILOR MADE

The whole range of IREM products has a very high level of customization, both in terms of electrical characteristics as well as mechanical and aesthetic. A staff of technicians specially dedicated to “special” projects can satisfy the most demanding requests.

SHORT DELIVERY TIMES

The particular architecture of IREM equipment allows to satisfy in a short time even the most demanding project, reducing design and production times. Moreover, the modular system used for higher power models simplifies transport and reduces time and cost.

IREM A GLOBAL LEADING PLAYER

SINCE 1947 MORE THAN 1,000,000 EQUIPMENT
ALL OVER THE WORLD

IREM

IREM SpA a socio unico

Headquarters:

Via Abegg 75
10050 Borgone Susa (TO) – ITALY

Registered office:

Via Rocciamelone 58
10050 S.Antonino di Susa (TO) – ITALY

Tel. +39 011 9648211 – Fax +39 011 9648222
E-mail: irem@irem.it

Business Register:

Torino / VAT No. IT00389630013
Fully paid-up capital: Euro 1.080.000
P.iva / CF: IT00389630013

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