Ecostab
Energy Saving System
automatic voltage optimisers
are one of the solutions offered by new technologies to users.
These devices comply with the requirements of
for electric equipment operating tolerances and supply an operating voltage which minimises consumption without impairing performance or reducing reliability.
IEC 60038 establishes that the electric equipment must be able to work correctly at an input voltage within ±10% of the nominal value, that is from 253V to 207V for single-phase devices and from 440V to 360V for three-phase devices.
This is an essential feature for all electric devices because
producers establish that the supplied voltage may vary within these limits contractually.
As a consequence, if a load is supplied at a value close to the lower operating tolerance limit (-8%) also when the mains voltage assumes the higher value established by contract (+10%), the difference between 253V and 207V in absolute terms is 18%.
This power supply difference allows to:
Ecostab automatic voltage optimisers deliver a stabilised voltage which can be set to the minimum tolerance established in IEC 60038, i.e. -8% (212V). This value is guaranteed also in presence of significant mains voltage variations. Interestingly, these devices are also excellent mains voltage stabilisers.
Models capable of broader input voltage variations may be built on demand. These may be needed because voltage may sometimes exceed the 10% tolerance specified in the supply contract.
Saving and return on investment
There are many factors which contribute to saving energy and reduce the payback period:
Since not all the appliances and loads ensure the same saving, a careful analysis on their use is necessary to predict potential saving.
Sometimes, it may be advantageous to limit the use of Ecostab voltage optimisers to some devices to optimise the investment.
The cost of the voltage optimiser will be usually paid off by the saved energy in a period ranging from two to five years.
Operating principle
An electronic control circuit detects the voltage delivered by the voltage optimiser and compares it to a reference voltage. If the difference between the output voltage and the reference voltage exceeds the preset tolerance limits, an error signal is generated; this signal may be either negative or positive according to whether the output voltage is lower or higher than the preset value. This signal activates the servomotor which moves the mobile contacts (electrographite rollers / brushes) of the variable autotransformer thus changing the transformation ratio in order to supply the additive or subtractive voltage needed to restore the value within the predetermined limits to the primary winding of the series transformer. The root-mean-square value (RMS) of the output voltage is stabilised and consequently not affected by possible harmonic distortions present in the input mains. This regulation system has the advantage of not having mobile contacts in series to the power supply line.
Range. Voltage optimisers are available in power range from 8 to 2800 kVA.
Accuracy. Ecostab voltage optimisers secure the true RMS voltage value with an accuracy of ±1% according to the presence of high harmonic distortions of the mains.
Regulation speed. An innovative control circuit combines an extremely fast regulation speed, from 11 to 33 ms/V according to the model, with the structural reliability of the electrodynamic system.
Overload capacity. This is a peculiarity of the Ecostab electrodynamic regulation system. These devices can withstand overloads up to ten times the rated power for ten milliseconds, five times the rated power for six seconds or twice the rated power for one minute without damage.
Efficiency. Efficiency up to 98% at full load.
Power factor and load variation insensitivity. The adopted operating principle ensures that the accuracy and the regulation speed features of Ecostab voltage optimisers remain unaltered under any load condition (full load or no load, with inductive or capacitive loads).
Frequency variation insensitivity. The control circuit works correctly also with mains frequency variations up to ± 5%.
Harmonic distortions. The high quality and correct use of materials ensure that the harmonic distortion is always maintained within 0.2% in any operating condition.
Impedance. The installation of an Ecostab voltage optimiser in a pre-existing system does not require a new calculation of the protections because the internal impedance of the optimiser, varying from 0.52 to 0.015 Ohm, does not significantly affect the line impedance.
Operating temperature. Ecostab voltage optimisers 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.
Degree of protection. According to the ambient conditions, the safety requirements and the installation site, Ecostab voltage optimisers are available in 4 versions with the following protection degree: IP00, IP21, IP54 INDOOR and IP54 OUTDOOR.
Reliability. The MTBF exceeding 500,000 hours is the result of continuous improvement in technical aspects and production process.
Cooling system. Ecostab voltage optimisers are cooled in different manner according to the type of casing and the ambient conditions by means of:
Installation. It is rather quick and easy. The voltage optimiser is installed after the energy counter and before the electric users.
Special versions. Ecostab voltage optimisers can be equipped on demand with special fittings in separate cabinet, like e.g.: maintenance by-pass, thermal magnetic circuit breakers, insulating transformer, surge suppressors, lightning arresters, harmonic filters.
Remote control. Ecostab voltage optimiers can be equipped with a special optional monitoring system POWER METER permitting the remote control via ETHERNET, INTERNET, GSM/GPRS. The following electric and physical parameters are detected: frequency, active power, reactive power, apparent power, distorting power, three-phase equivalent current, line current, power factor, active, reactive and inductive energy, harmonics, temperature, humidity, switch and contactor state. By using the POWER MANAGEMENT software installed on a non-dedicated PC, detected values can be managed and statistics can be obtained on a daily, weekly, monthly and yearly basis with various viewing, data processing, cost calculation and energy saving possibilities.
Compliance with standards. Ecostab voltage optimisers comply with the following Directives:
M2..B Single- phase 230V 50-60 Hz- IP21 | |||||||
Model | Rated Power (KVA) | Input Voltage Variation (±%) | Output regulation range (%) | Response Time (ms/V) | Output accuracy (±%) | Dimensions AxBxH (mm) | Net weight (kg) |
M208EJ8B | 8 | 10 | 0 to -8 | 21 | 1 | 600x350x290 | 45 |
M210EJ12B | 12 | 21 | 800x450x400 | 65 | |||
M211EJ20B | 20 | 22 | 80 | ||||
M212EJ25B | 25 | 27 | 120 |
Y3..B Three- phase +N 400V 50/60 Hz -IP21 | |||||||
Model | Rated Power (KVA) | Input Voltage Variation (±%) | Output regulation range (%) | Response Time (ms/V) | Output accuracy (±%) | Dimensions AxBxH (mm) | Net weight (kg) |
Y308EJ20B | 20 | 10 | 0 to -8 | 13 | 1 | 350x580x890 | 120 |
Y310EJ40B | 40 | 12 | 450x800x1200 | 210 | |||
Y311EJ60B | 60 | 16 | 240 | ||||
Y312EJ80B | 80 | 19 | 290 | ||||
Y313AJ100B | 100 | 17 | 650x650x1800 | 480 | |||
Y314AJ150B | 150 | 27 | 1100x650x1800 | 620 | |||
Y316AJ200B | 200 | 19 | 650 | ||||
Y317AJ300B | 300 | 22 | 750 | ||||
Y318AJ400B | 400 | 16 | 1100x900x1900 | 1100 | |||
Y319AJ600B | 600 | 17 | 1100x1270x1800 | 1360 | |||
Y320AJ800B | 800 | 18 | 1100x1270x1900 | 1770 | |||
Y320AJ1000B | 1000 | 18 | 100x1270x1900 | 1850 | |||
Y322AJ1250B | 1250 | 26 | 2130x1350x2150 | 2700 | |||
Y323AJ1600B | 1600 | 18 | 3100 | ||||
Y324AJ2000B | 2000 | 17 | 3400 | ||||
Y326AJ2300B | 2300 | 18 | 3 cabinets 1100x1270x1900 | 3800 | |||
Y328AJ2500B | 2500 | 24 | 5200 | ||||
Y330AJ2800B | 2800 | 26 | 5700 |
M2..S Single- phase 230V 50-60 Hz- IP21 | |||||||
Model | Rated Power (KVA) | Input Voltage Variation (±%) | Output regulation range (%) | Response Time (ms/V) | Output accuracy (±%) | Dimensions AxBxH (mm) | Net weight (kg) |
M208EJ8S | 8 | 10 | 0 to -8 | 21 | 1 | 600x350x290 | 45 |
M210EJ12S | 12 | 21 | 800x450x400 | 65 | |||
M211EJ20S | 20 | 22 | 80 | ||||
M212EJ25S | 25 | 27 | 120 |
Y3..S Three- phase +N 400V 50/60 Hz -IP21 | |||||||
Model | Rated Power (KVA) | Input Voltage Variation (±%) | Output regulation range (%) | Response Time (ms/V) | Output accuracy (±%) | Dimensions AxBxH (mm) | Net weight (kg) |
Y308EJ20S | 20 | 10 | 0 to -8 | 13 | 1 | 350x580x890 | 120 |
Y310EJ40S | 40 | 12 | 450x800x1200 | 210 | |||
Y311EJ60S | 60 | 16 | 240 | ||||
Y312EJ80S | 80 | 19 | 290 | ||||
Y313AJ100S | 100 | 17 | 650x650x1800 | 480 | |||
Y314AJ150S | 150 | 27 | 1100x650x1800 | 620 | |||
Y316AJ200S | 200 | 19 | 650 | ||||
Y317AJ300S | 300 | 22 | 750 | ||||
Y318AJ400S | 400 | 16 | 1100x900x1900 | 1100 | |||
Y319AJ600S | 600 | 17 | 1100x1270x1800 | 1360 | |||
Y320AJ800S | 800 | 18 | 1100x1270x1900 | 1770 | |||
Y320AJ1000S | 1000 | 18 | 100x1270x1900 | 1850 | |||
Y322AJ1250S | 1250 | 26 | 2130x1350x2150 | 2700 | |||
Y323AJ1600S | 1600 | 18 | 3100 | ||||
Y324AJ2000S | 2000 | 17 | 3400 | ||||
Y326AJ2300S | 2300 | 18 | 3 cabinets 1100x1270x1900 | 3800 | |||
Y328AJ2500S | 2500 | 24 | 5200 | ||||
Y330AJ2800S | 2800 | 26 | 5700 |