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Agios Dimitrios Athens
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Ecostab

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

IEC 60038

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

energy

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:

  1. a) obtain a significant saving of energy;
    b) Extend the working life of electric equipment. Ecostab voltage optimisers prevent devices from being powered at higher values than the rated voltage. For example, it is a known fact that the life of sodium bulbs is reduced by 50% when they are powered at a voltage 10% higher than their rated value;
    c) Secure a significant reduction of carbon dioxide emissions. This corresponds to approximately 630 g for every saved kWh of energy.

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.

  • Standard single-phase modelscan deliver a variable voltage from 230V to 212V with input voltage comprised in the 207-253V range.
  • Standard three-phase modelscan deliver a variable voltage from 368/212V to 400/230V with input voltage comprised between 360/207V and 440/253V.

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:

  • Mains voltagewhich is not always close to rated value. Voltage is usually higher late at night: 10% higher than the rated value is a common condition. This level is often exceeded when the user is located near an electric substation. Saving increases to approximately 20% when the voltage exceeds 10% of the rated value.
  • Type of powered device. Some devices allow higher saving than others and some electric devices do not provide any significant saving at all.
  • Device use.The best results are obtained by using Ecostab in connection to motors with stall torque often lower than the maximum deliverable torque.
  • Overall consumption of devices powered by the voltage optimiser.The higher the power of the Ecostab voltage optimiser, the shorter its 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.

Features

Technical Specifications

Product Brochure

General features

Range. Voltage optimisers are available in power range from 8 to 2800 kVA.

  • Single-phase 100-110-115-120-127-200-220-230-240-265-277V.
  • Single-phase with input 240V and output 230V.
  • Three-phase 208-220-230-240-380-400-415-440-460-480-500V.
  • Three-phase with input 415V and output 400V.
  • Frequency: 50 or 60 Hz.

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:

  • natural convection
  • fans
  • air conditioning

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:

  • Electro Magnetic Compatibility 2004/18/EC and following amendments.
  • Low Voltage Electrical Equipment 2006/95/EC and following amendments.

M2..B Single- phase 230V 50-60 Hz- IP21
ModelRated Power (KVA)Input Voltage Variation (±%)Output regulation range (%)Response Time (ms/V)Output accuracy (±%)Dimensions AxBxH (mm)Net weight (kg)
M208EJ8B8100 to -8211600x350x29045
M210EJ12B1221800x450x40065
M211EJ20B202280
M212EJ25B2527120

 

Y3..B Three- phase +N 400V 50/60 Hz -IP21
ModelRated Power (KVA)Input Voltage Variation (±%)Output regulation range (%)Response Time (ms/V)Output accuracy (±%)Dimensions AxBxH (mm)Net weight (kg)
Y308EJ20B20100 to -8131350x580x890120
Y310EJ40B4012450x800x1200210
Y311EJ60B6016240
Y312EJ80B8019290
Y313AJ100B10017650x650x1800480
Y314AJ150B150271100x650x1800620
Y316AJ200B20019650
Y317AJ300B30022750
Y318AJ400B400161100x900x19001100
Y319AJ600B600171100x1270x18001360
Y320AJ800B800181100x1270x19001770
Y320AJ1000B100018100x1270x19001850
Y322AJ1250B1250262130x1350x21502700
Y323AJ1600B1600183100
Y324AJ2000B2000173400
Y326AJ2300B230018

3 cabinets

1100x1270x1900

3800
Y328AJ2500B2500245200
Y330AJ2800B2800265700

 

 

 

 

 

 

 

 

 

 

M2..S Single- phase 230V 50-60 Hz- IP21
ModelRated Power (KVA)Input Voltage Variation (±%)Output regulation range (%)Response Time (ms/V)Output accuracy (±%)Dimensions AxBxH (mm)Net weight (kg)
M208EJ8S8100 to -8211600x350x29045
M210EJ12S1221800x450x40065
M211EJ20S202280
M212EJ25S2527120

 

Y3..S Three- phase +N 400V 50/60 Hz -IP21
ModelRated Power (KVA)Input Voltage Variation (±%)Output regulation range (%)Response Time (ms/V)Output accuracy (±%)Dimensions AxBxH (mm)Net weight (kg)
Y308EJ20S20100 to -8131350x580x890120
Y310EJ40S4012450x800x1200210
Y311EJ60S6016240
Y312EJ80S8019290
Y313AJ100S10017650x650x1800480
Y314AJ150S150271100x650x1800620
Y316AJ200S20019650
Y317AJ300S30022750
Y318AJ400S400161100x900x19001100
Y319AJ600S600171100x1270x18001360
Y320AJ800S800181100x1270x19001770
Y320AJ1000S100018100x1270x19001850
Y322AJ1250S1250262130x1350x21502700
Y323AJ1600S1600183100
Y324AJ2000S2000173400
Y326AJ2300S230018

3 cabinets

1100x1270x1900

3800
Y328AJ2500S2500245200
Y330AJ2800S2800265700

asda

Product Brochure

Download the Pdf here

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