Automatic voltage optimisers EcoREG series

Automatic voltage stabilisation is a key function that sets EcosREG voltage optimisers apart from simple autotransformers, which also reduce voltage but cannot guarantee certain savings due to the continuous voltage variations of the mains. 

More details

Aunilec proposal

Voltage optimisation is a term given to the systematic controlled reduction in the voltages received by an energy consumer to reduce energy use, power demand and reactive power demand. While some voltage “optimisation” devices have a fixed voltage adjustment, others electronically regulate the voltage automatically. Voltage optimisation systems are typically installed in series with the mains electrical supply to a building, allowing all its electrical equipment to benefit from an optimised supply. Overvoltage leads to sites using more electricity than needed, and as a result incurring higher electricity bills. The overvoltage is not only costly but can also be detrimental to equipment. Excess voltage produces additional noise, heat and vibration, causing stress on internal parts - especially to motors which are vulnerable to overheating and wear out more quickly. Aunilec EcoREG voltage optimisation system ensures that a building only receives and pays for the voltage that it actually needs, and no more. Aunilec EcoREG Voltage Optimisers are available in power rating from 15 to 2600 kVA, single-phase and three-phase versions.

Voltage optimisation (VO):

The average voltage supply from many national grids around the world is often higher than the ideal operating voltage for most electrical equipment like lighting and motors. For example, a 230V linear appliance used on a 240V supply will take 4.3% more current and will consume almost 9% more electricity than at 230V. Sites fitted with a voltage optimisation system often achieve reductions in the region of 5 to 15% for energy consumption, costs and therefore carbon emissions! The first step in voltage optimisation is to monitor and know your present incoming voltage levels, the Aunilec Energy Saving Meter allows you to determine this. Aunilec EcoREG Voltage Optimisers of “B” series are fitted with 2 digital network analysers.

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.

Saving and return on investment

There are many factors which contribute to saving energy and reduce the payback period

a. Mains voltage which 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.

b. Type of powered device. Some devices allow higher saving than others and some electric devices do not provide any significant saving at all.

c. Device use. The best results are obtained by using EcoREG in connection to motors with stall torque often lower than the maximum deliverable torque.

d. Overall consumption of devices powered by the voltage optimiser. The higher the power of the EcoREG 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 EcoREG 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.

Single-phase 230V 50/60Hz voltage optimisers - IP21 indoor models

Model

Rated power

(kVA)

Input

voltage

variation

(+/-%)

Output

regulation

range

(%)

Response

Time

(ms/V)

Output

accuracy

(%)

Dimensions

(mm)

axbxh

Weight

(kg)

ECOREG-M212AJ-2424100 to -10101650x450x1000105
ECOREG-M213AJ-3232100 to -10101650x650x1300168
ECOREG-M214AJ-4848100 to -10211650x650x1800220
ECOREG-M216AJ-6363100 to -10211650x650x1800250
ECOREG-M217AJ-9595100 to -10291650x650x1800320
ECOREG-M218AJ-130130100 to -102311100x650x1800400
ECOREG-M219AJ-195195100 to -103311100x650x1800625

Three-phase 400V 50/60Hz voltage optimisers - IP21 indoor models

Model

Rated power

(kVA)

Input

voltage

variation

(+/-%)

Output

regulation

range

(%)

Response

Time

(ms/V)

Output

accuracy

(%)

Dimensions

(mm)

axbxh

Weight

(kg)

ECOREG-T308AJ-2020100 to -10181650x450x1000122
ECOREG-T310AJ-5050100 to -10121650x650x1300250
ECOREG-T312AJ-7070100 to -10121650x650x1300280
ECOREG-T314AJ-100100100 to -10121650x650x1300320
ECOREG-T315AJ-150150100 to -10171650x650x1800415
ECOREG-T316AJ-200200100 to -101411100x650x1800620
ECOREG-T318AJ-300300100 to -101811100x650x1800750

ECOREG-T319AJ-435435100 to -102611100x1100x18001300

Three-phase + N 400V 50/60Hz voltage optimisers - IP21 indoor models

Model

Rated power

(kVA)

Input

voltage

variation

(+/-%)

Output

regulation

range

(%)

Response

Time

(ms/V)

Output

accuracy

(%)

Dimensions

(mm)

axbxh

Weight

(kg)

ECOREG-Y306AJ-1515100 to -10141650x450x1000120
ECOREG-Y308AJ-2020100 to -10161650x450x1000140
ECOREG-Y3010AJ-3535100 to -10161650x450x1000210
ECOREG-Y311AJ-6060100 to -10161650x650x1300240
ECOREG-Y312AJ-7070100 to -10241650x650x1300290
ECOREG-Y313AJ-9595100 to -1061650x650x1800490
ECOREG-Y314AJ-145145100 to -10121100x650x1800560
ECOREG-Y316AJ-190190100 to -10121100x650x1800630
ECOREG-Y317AJ-285285100 to -10171100x650x1800780
ECOREG-Y318AJ-390390100 to -101311100x1100x18001200
ECOREG-Y319AJ-585585100 to -101911570x1415x20101700
ECOREG-Y320AJ-850850100 to -10161

3 units

1100x1100x1800

3x930
ECOREG-Y322AJ-11001100100 to -10231

3 units

1100x1100x1800

3x1070
ECOREG-Y323AJ-14001400100 to -10241

3 units

1570x1415x2010

3x1400
ECOREG-Y324AJ-17001700100 to -10231

3 units

1570x1415x2010

3x1550
ECOREG-Y326AJ-20002000100 to -10241

3 units

2030x1415x2015

3x1670
ECOREG-Y328AJ-23002300100 to -10231

3 units

2030x1415x2015

3x1900
ECOREG-Y330AJ-26002600100 to -1061

3 units

2030x1415x2015

3x2200