IREM PROPOSAL
VOLTAGE STABILISERS
Ministab – Sterostab
LINE CONDITIONERS
Ministatic – Steroguard
INTEGRATED POWER SUPPLIES
AI – AO
ISOLATION TRANSFORMERS
ITT – IT
PASSIVE FILTERS FOR HARMONICS
PHF – VTF
UNINTERRUPTIBLE POWER SYSTEMS
Minipower – Steropower
VOLTAGE DIP COMPENSATOR
STEROCOMP
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
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
VOLTAGE STABILISERS
Y series – M series
VOLTAGE SPIKES
ELECTRONIC LINE CONDITIONERS
INTEGRATED POWER SUPPLIES
ISOLATION TRANSFORMERS
HIGH FREQUENCY DISTURBANCES
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
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
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
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
VOLTAGE DIP
A voltage dip is defi ned as a temporary, unpredictable, and random reduction of the supply voltage to a value between 90% and 5% of the nominal voltage.
The causes of voltage dips vary and can include faults in the power grid, malfunctions in electrical installations, and transient overloads such as the inrush current of large motors or the connection of high-power loads. A voltage dip propagates from higher voltage levels to lower ones, meaning that, in many cases, the load experiencing the issue is connected to a voltage level lower than where the dip originated.
VOLTAGE DIP COMPENSATOR
STEROCOMP
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.
VOLTAGE STABILISERS
MINISTAB 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.
LINE CONDITIONERS
MINISTATIC AND STEROGUARD
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.
INTEGRATED POWER SUPPLIES
AI – AO
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.
ISOLATION TRANSFORMERS
ITT – IT
IREM ITT transformers are low voltage power transformers.
The single-phase, three-phase or three-singlephase transformers are available in a wide range of power and voltage and are specifically designed according to customer requirements and the specific field of application.
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.
PASSIVE FILTERS FOR HARMONICS
PHF – VTF
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. IREM VTF Passive Filters increase the useful life of the motor winding, protect the motor against voltage peaks and improve operation in inverter-controlled threephase asynchronous motor drives. Typical applications include loads present in air conditioning, water treatment, oil sector and industrial automation processes in general.
ACTIVE FILTERS FOR HARMONICS
AHF
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..
UNINTERRUPTIBLE POWER SYSTEMS
MINIPOWER AND STEROPOWER
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.
VOLTAGE DIP COMPENSATORS
STEROCOMP SERIES
Many devices can withstand voltage dips due to their mechanical and electrical inertia; however, this is not the case for electronic equipment and relays used to control most automated lines, leading to signifi cant costs for product rework and plant restart.
The STEROCOMP series is designed to provide the correct power supply during voltage dips and effectively keep the system running in compliance with the Semi F47 standard.
VOLTAGE OPTIMISERS
ECOSTAB – ECOBUCK
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.