REG-M/REG-T/REG-Y stabilisers are Aunilec’s technological and innovative answer to this problem, permitting to supply electric users with a voltage stabilised to the rated value they have been designed for even in presence of strong harmonic distortions.
REG-M (single-phase) 1kVA-320kVA
REG-T (three-phase) 3kVA-780kVA
REG-Y (Independant phase regulation) 3kVA-2800kVA
The wider use of equipment with non linear absorption such as rectifiers, speed variators, drives, switching power supplies, has caused, besides traditional and well known voltage fluctuations, the spreading of a new insidious type of electrical fault: harmonic distortion. This fault “deceives” traditional stabilising systems that, in its presence, read wrong input voltage values. As a consequence a voltage is delivered with an efficient value that differs from the rated one, becoming greater as the harmonic distortion of the mains increases.REG-M/REG-T/REG-Y stabilisers are Aunilec’s technological and innovative answer to this problem, permitting to supply electric users with a voltage stabilised to the rated value they have been designed for even in presence of strong harmonic distortions.
Power supply interferences and failures
Failures on the distribution lines, atmospheric discharges, continual 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 with the electric energy producer. Very often the tolerance is insufficient for more sensitive facilities. Other times the mains voltage reaches levels that exceed the foreseen rated value by 15, 20 or even 25%. The voltage fluctuations are particularly treacherous interferences since they are not seen and can only be detected by using specific equipment. When such interferences are present, the electrical equipment seems to maintain correct operation but disguises serious problems that at times are beyond repair. Even an ordinary light bulb, if overpowered by 10%, continues to give light, but halves its operating life.
The situation becomes much more serious in the case of voltage variations on more complicated equipment.
REG-M/REG-T/REG-Y are registered names of two series of electrodynamic voltage stabilisers that offer a reliable and tested economic solution to inconveniences caused by voltage fluctuation. To use REG stabilisers is a real investment because the elimination of the inconveniences means a reduction in costs and anincrease in productivity. Very often it is only necessary to avoid a few minutes machine downtime or just one failure to repay the cost of the stabilisers.
REG are particularly suitable for applications that require:
REG-M/REG-T/REG-Y regulate through a series transformer. A static control circuit drives the variable autotransformer that supplies the required voltage to the series transformer either in phase or phase opposition to bring the mains to the rated value. The three-phase stabilisers are available in two versions:
Aunilec voltage regulators are available in power rating from 1 kVA to 4750 kVA. Models up to 100 kVA can usually be delivered ex stock. Upon request we can supply stabilisers with the following characteristics:
REG-M/REG-T/REG-Y ensure the “true RMS value” of the voltage with an accuracy range that varies according to the model from ±0.5% to ±1.5%, even where strong harmonic distortions are present on the line.
The advanced electronic control circuit ensures a fast response, from 11 to 50 ms/Volt according to the model. A controlled deceleration minimises overshoots.
A typical characteristic of the REG regulation system. In fact, they can support without damage overloads up to 10 times the rated current for 10 milliseconds, 5 times for 6 seconds and 2 times for 1 minute.
At full load the range is from 96% for small models to 98% for the larger units.
Insensitivity to power factor and load variations
The REG series operating principle ensures that the equipment accuracy and regulation speed characteristics remain unaltered under any load conditions, with inductive or capacitive loads.
Insensitivity to frequency variations
The servomotor control circuit operates correctly with mains frequency variations up to ±5%.
Negligible waveform distortion
The high quality materials and their correct use ensure that harmonic distortion is always less than 0.2% underany working conditions.
Low intemal impedance
Installation of REG-M/REG-T/REG-Y in already existing systems does not require a new calculation of the protections since their internal impedance varying from 0.52 to 0.015 ohm does not significantly affect the line impedance.
REG series are designed to work correctly at a maximum ambient temperature of 40°C in the most demanding conditions: continuous operation, full load and minimum input voltage. Models suitable for operation at temperatures higher than 40°C are manufactured on request.
The continual improvements that the REG-M/REG-T/REG-Y have undergone in over 50 years of activity during which our partner has manufactured over 430,000 stabilisers have obtained an exceptional MTBF for these devices.
Conformity to standards
REG-M/REG-T/REG-Y conform to the requirements of the following standards: Electro Magnetic Compatibility 2004/18/EC and following amendments; Low Voltage Electrical Equipment 2006/95/EC and following amendments.