The light you needo r b i s . e so r b i s e n e r g i a i n t e l i g e n t e . c o m

Light Flux Reducer

ESDONI

The concepts of energy efficiency and savings are in-creasingly present in the development of our society. Problems, such as global warming, diminishing energy resources and light contamination etc, are forcing the de-velopment of energy systems that are ecosystem sensiti-ve. At the same time, all these difficulties are leading to continuous rises in energy prices and results in greater costs involved in maintaining the current rate of growth. When this is added to the fact that in our installations, the cost for lighting represents approximately 50% of the total electricity bill, we can understand the growing need to replace existing lighting installations by others that are more efficient and to design these new ones employing energy saving criteria.

One of the main proposals is the installation of regulation systems for discharge lamps used in lighting because the-se increase their consumption considerably and useful lifetime is reduced by the over-voltages produced during the night.

Respect for the environment,

future commitment.

Outside lighting savings systems

The graphs below show the performance of these lamps under the influence of these nocturnal over-voltages:

These nocturnal over-voltages occur at the end of the commercial activities in factories, offices, shopping malls and dwellings etc. Outside lighting is the only consumer during these hours and has to receive these excessive voltage levels that are much higher than the one for which the auxiliary ballast and lamps were designed. Be-cause of this, nighttime consumption rises by an average of around 20%.

LAM

P LI

FETI

ME

(%)

LINE VOLTAGE (V)

100%

80%

60%

40%

20%

220 225,5 231 236,5 242

RATED VOLTAGE

+2,5%

5%

+7,5%

+10%

vaRiatiOn OF useFul liFetime in FunCtiOn OF vOltageAuxiliary equipment + 100 W sodium vapour lamp

vaRiatiOn OF POWeR in FunCtiOn OF vOltageAuxiliary equipment + 100 W sodium vapour lamp

A 7% increase in voltage means a 50% reduction in useful lifetime

A 10% increase above the voltage rating means 20% increase in con-sumption and a 25% reduction in voltage means a 40% saving.

POW

ER (

%)

130 120110100908070605040

253 230 220 215 210 205 195 185 175

LINE VOLTAGE (V)

The first savings system to appear was the partial switch-off or double circuit. It consisted of the division of the circuits into two groups: half night and full night, thus achieving savings that were directly proportional to the number of lights switched off. This system had the drawback of loss of uniform lighting levels or “ze-bra effect” the caused a sensation of insecurity in the city folk and visual discomfort in vehicle drivers. This system is currently in disuse and even advised against in some countries.

Another system is that employing double-level bal-last. This is based on additional reactance ballast that reduces the current circulating through the lamp. How-ever, this system suffers losses because of the heat generated in this ballast and from the lamp switching off when it is coming to the end of its lifetime.

The system is activated by a point-to-point control cable which increases installation complexity and investment. Another activation method is to use an internal timer in each lamp without a common control cable, but because activation is independent, failure of such elements would produce areas of reduced light-ing and others with full lighting that would again cause discomfort to passersby.

Despite providing excellent consumption savings, LED lighting involves installation modification, increasing the number of luminaries and their layout. This large cost, together with the high price of the LED lamps means that the initial investment is difficult to accept and we finally decide not to apply savings measures.

It should be appreciated that none of these systems resolves the problem of nocturnal over-voltages.

This savings system consists of controlling the sup-ply voltage to the lamps from the line header avoid-ing the negative effects of nocturnal over-voltages, premature lamp ageing and increased energy con-sumption.

There is no need to modify the lamps or the line dis-tribution and all that is required is to connect the out-put of the main contactor to the Esdoni equipment and from here to the line protection breaker. An astronomi-cal timer switch will control installation switch on and off in function of the solar timetable for the installation geographical location.

Installation is both simple and economical since it is made at the line header in the main lighting power boards as follows:

Operation comprises three stages:

• Switch on: this is made at a lower voltage to that of the mains in

order to reduce the consumption peak during installation switch

on.

• Stabilisation: after the switch-on time, the Esdoni increases the

voltage to the rated value and keeps it constant independently

of mains voltage variations. During this stage, we ensure that

the lamps receive the voltage for which they were designed, thus

achieving a second saving for stabilisation.

• Reduction: at the time programmed in the timer switch, the Es-

doni equipment produces a slow voltage reduction to the lamps.

This stage occurs during the hours of least installation use when

lighting requirements are not the same. The savings obtained in

stage are about 40% for sodium vapour lamps and 25% for mer-

cury vapour lamps.

What is a stabiliseR-Flux ReduCeR?

> Nominal, reduced and start-up level curve until dawn of an ESDONI equipment.

230220210200190180170

8 9 10 11 12

OutPut CiRCuits

main COntaCtOR astROnOmiC sWitCh

POWeR suPPly

stReet lighting Cabinet

Fast, simple and economical installation, without any need to modify the existing installationesdOni en + astRO lOg

VOLT

S

6 MINUTES

DAILY CONNECTION CYCLE

CHANGE AT REDUCED FLUX

RATED LEVELSTART-UP LEVEL

REDUCE LEVEL

HOURS

In 1988, patent No 8802945 was obtained for the first Esdoni equipment. Since then, ESDONI equipment has continued to develop in both technology and design and leading to the current models:• ESDONI EN: for three-phase systems, 3 x 400 Vac +

neutral and powers of 10 to 60 kVA. • ESDONI SN: for three-phase systems, 3 x 230 Vac

and powers of 6 to 30 kVA.• ESDONI M: for single-phase 230 Vac systems at

powers of 3 to 16 kVA.

TEchNIcaL SpEcIfIcaTIONS:• High performance exceeding 99% in rated regime at

full load. ±1% precision.• Accepts load imbalance of 0% to 100%.• No harmonics, micro-cuts or power factor variations.• Independent protection and programming by phase.• Its components guarantee greater robustness and

useful lifetime. • No maintenance required.• Three years full warranty and training course.

Request a savings study of your installation and further information at info@orbis.es

SITUATION WITHOUT ESDONI STABILISER - REDUCER

Public lighting installation with 100 HPSV, 400 V units

• Installed power:

- 400 W lamp + 30 W auxiliary equipment = 430 W per luminary

- 430 W x 100 luminaries = 43,000 W = 43 kW at rated voltage (220 V)

• Extra consumption due to over-voltage:

A mean over-voltage during the night of 6% causes a 16% increase in consumption.

43 kW x 1,14 = 49,020 kW at actual voltage

• Power consumed in one year:

With an annual use of 4,200 hours

49,020 kW x 4,200 hours = 205.88 kWh consumed per year

SITUATION WITH ESDONI STABILISER - REDUCER

Annual consumption with ESDONI equipment and flux reduction from 24:00 until installation switch off.

• Hours of use at rated power: 1,700

• Hours of use at reduced power: 2,500

43 kW x 1,700 h = 73.1 kWh consumed in one year at rated power

43 kW x 2,500 h x 0.6 = 64.5 kWh consumed in one year at reduced power

73.1 kWh + 64.5 kWh = 137,6 kWh consumption per year with ESDONI

ANNUAL SAVINGS

205.88 kWh – 137.6 kWh = 68,284 kWh per year, equivalent to 33.2% of the power.

savings With esdOni equiPment

teChniCal sPeCiFiCatiOns and mOdels

DISTRIBUTOR

ORBIS TECNOLOGÍA ELÉCTRICA, S.A.Lérida, 61. E-28020 MADRIDTel.: +34 91 567 22 77Fax: +34 91 571 40 06www.orbis.es • info@orbis.es

ORBIS TECNOLOGÍA ELÉCTRICA, S.A. reserves the right to fully or partially modify the specifications found on this leaflet.