EL-TIRAS OÜ

EL-TIRAS OÜ EL-TIRAS OÜ tegeleb elektripaigaldiste ehitamise, renoveerimise ja projekteerimisega. Pakkume teenuseid kuni 1000VAC elektritööde tegemiseks.

Elektripaigaldiste ehitus
Elektripaigaldiste remont ja renoveerimine
Elektripaigaldiste käit ja hooldus
Elektriseadmete installatsioon
Elektriseadmete hooldus ja –remont
Elektriavariide kõrvaldamine

Строительство электроустановок
Ремонт и реновация электроустановок
Обход и обслуживание электроустановок
Установка электрооборудования
Обслуживание и ремонт электрооборудования
Устранение электр

оаварий

Building electrical installations
Repair and renovation of electrical installations
Operation and maintenance of electrical installations
Electrical equipment installation
Maintenance and repair of electrical equipment
Electrical accident elimination

12/12/2015

Make your bath lighting easy with these modern bathroom lighting tips and bathroom lighting ideas.

12/12/2015

Bathroom Lighting Guide

Guidelines To Residential Room Lighting.Architects of development houses usually select the locations for switches, rece...
08/10/2015

Guidelines To Residential Room Lighting.

Architects of development houses usually select the locations for switches, receptacles, and luminaires at a quality and price level determined by the builder. However, purchasers of architect-designed, custom-built homes usually have an opportunity to decide on the selection of luminaires and exert some influence over price, quality, and locations that suit their preferences. In either case, the homeowner must provide the task and accent luminaires needed to supplement the lumens from the permanent ambient luminaires to arrive at the recommended illumination levels.

Dimmer switches give the homeowner additional control over the illumination, permitting it to be varied according to the desired mood for the room-bright for parties and festive occasions and subdued for relaxation.

The family room is the recreation and entertainment centre in modern homes. Lighting plans for these rooms closely resemble those for living rooms. Lighting will include permanent lighting fixtures supplemented by task and accent luminaires. Accent lighting can highlight such features as pictures and bookcases. Family rooms typically include a sofa, various upholstered chairs, and perhaps a table with chairs for reading, playing games, studying, or doing homework. Three way table and floor lamps providing 800 to 1700 lm with incandescent or fluorescent lamps can supply the necessary task lighting. Dimmer-equipped recessed or track lighting permits the illumination level to be adjusted for glare-free TV or computer screen viewing.

Dining room lighting

Dining rooms or spaces typically have a chandelier mounted directly above the likely position of the dining table. It is likely to be the centrepiece of the room as well as the principal source of ambient illumination. Ambient lighting should be 70 fc. A wall-mounted dimmer will permit the light from the chandelier to be controlled to set the mood of the room. Most dining rooms have supplementary lighting at the buffet or sideboard that can be provided by sconces or table lamps.

Kitchen Lighting

Around 80 lm/ft2 is recommended for kitchens. In modern kitchen lighting design, a central dome luminaire is supplemented by recessed lights. Under-cabinet luminaires are widely used to increase countertop illumination.

Bathroom lighting

Bathrooms need bright general lighting that can be supplied by permanent wall or ceiling-mounted luminaires with incandescent or fluorescent lamps mounted above or around the mirror. Ambient bathroom lighting should be 70 fc. For effective illumination in large bathrooms, it is common to have a row of recessed lights in the ceiling. Fan-light combinations are also used above bathtubs and showers to remove steam and water vapour rapidly. Some bathrooms are fitted with infrared heat lamps to assist in after-bath drying and to supplement room heating during cold weather. These lamps can be controlled by a timing switch that shuts them off after a set period.

Bedroom lighting

Modern bedrooms typically have ceiling dome lights for general-purpose lighting and separate task luminaires for bedside tables or bed headboards. Ambient bedroom lighting should be about 30 fc.
An overhead light in a walk-in closet controlled by a doorframe switch avoids fumbling for a light switch in the dark. Light for reading in bedrooms is typically provided by adjustable reading lamps with incandescent or halogen bulbs on bedside tables on both sides of queen- and king-size beds. Bedrooms with twin beds are likely to have a dual-lamp luminaire with separate switches on a night table between the beds. Bedrooms often have a floor lamp or torchieres to provide subtle accent lighting effects. They could provide enough light for reading if placed next to chairs located in the bedroom.

Difference between Diffuse and Directed Light.Having dealt with light quantity, consideration must be given to the quali...
28/09/2015

Difference between Diffuse and Directed Light.

Having dealt with light quantity, consideration must be given to the quality of light, the difference between diffuse light and directed light being one of the most important aspects. We are familiar with these different forms of light through our everyday experience with daylight – direct sunlight when the sky is clear and diffuse light when the sky is overcast.

Diffuse light is produced by extensive areas that emit light. These may be extensive, flat surfaces, such as the sky in the day-time, or, in the field of artificial lighting, luminous ceilings. In interior spaces diffuse light can also be reflected from illuminated ceilings and walls.

This produces soft lighting, which illuminates the entire space and makes objects visible, but produces reduced shadows or reflections.

Directed light is emitted from point light sources. In the case of daylight this is the sun, in artificial lighting compact light sources. The essential properties of directed light are the production of shadows on objects and structured surfaces, and reflections on specular objects. These effects are particularly noticeable when the general lighting consists of only a small portion of diffuse light.

Daylight, for example, has a more or less fixed ratio of sunlight to sky light (directed light to diffuse light) of 5:1 to 10:1. In interior spaces, on the other hand, we can determine the ratio of directed and diffuse light we require or prefer.

The portion of diffuse light decreases when ceiling and walls receive too little light, or when the light falling on a surface is absorbed to a large extent by the low reflectance of the environment.

This can be exploited for dramatic effects through accent lighting. This technique is often applied for the presentation of objects, but is only used in architectural lighting when the concept intends to create a dramatic spatial effect.

Directed light not only produces shadows and reflections; it opens up new horizons for the lighting designer because of the choice of beam angles and aiming directions that he has at his disposal.
Whereas the light emitted by diffuse or exposed light sources always has an effect on the entire space, in the case of tightly controlled light, the effect of the light relates directly to the position of the luminaire.

Here lies one of the most progressive aspects of lighting technology. Whereas in the era of the candle and the oil lamp the light was bound to the immediate vicinity of the luminaire, it is now possible to use light in other parts of the space at any distance from where the light source is located.

Elektrivoolu toime inimesele. Elektrivool on elektrilaengute korrastatud liikumine läbi mingi keskkonna. Kui inimese keh...
07/09/2015

Elektrivoolu toime inimesele.

Elektrivool on elektrilaengute korrastatud liikumine läbi mingi keskkonna. Kui inimese keha satub voolu alla, on ta elektrijuht. Elektrivool avaldab inimese kehale läbimisel termilist, elektrolüütilist ja bioloogilist toimet. Soojuslik toime avaldub põletustes, vere temperatuuri tõusus, südame, peaaju ja närvide ülekuumenemises. Elektrolüütiline toime avaldub vere ja koevedelike lagundamises.

Bioloogiline toime - elektrivool lõhub normaalseid talitlusprotsesse, põhjustab näiteks närvisüsteemis muutusi (halvatust). Kahjustused elektrivoolu toimel on kaht liiki: 1) elektrilöök 2) elektritraumad (põletused, elektrimärgid, naha metalliseerumine, silmade kahjustus, mehhaanilised kahjustused). Elektrilöök jaotatakse kahjustuse ulatuse järgi astmeteks:

I aste - lihaste krambid ilma teadvuse kaotuseta;
II aste - sama koos teadvuse kaotusega;
III aste - teadvuse kaotus ja hingamisteede halvatus või südame fibrillatsioon;
IV aste - kliiniline surm.

Kliiniline surm saabub südame ja kopsude tegevuse seiskumise korral. Kliinilise ja bioloogilise surma vahe on 7-8 minutit. Sel üleminekuperioodil on võimalik kannatadasaanut päästa, kui teha kunstlikku hingamist ja südamemassaaži. Kõigepealt tuleb kannatadasaanu voolu alt vabastada. Voolu juhtivate osadega kokkupuutel, kui inimest läbiv vool on kõrgem krambilävest (2025 mA vahelduvvoolu), klammerdub inimene juhtmete külge. Tuleb silmas pidada, et see võib olla ohtlik abiandjale:

1) elektriseade, mille küljes on kannatadasaanu, tuleb välja lülitada;
2) kui inimene on ülal kõrguses, siis tuleb võtta kasutusele ettevaatusabinõud, et kannatanu alla ei kukuks ja uut traumat ei saaks;
3) seadme väljalülitamisega lülitub välja ka valgustus, seepärast võimaluse korral organiseerida valgustus mingist teisest allikast.

Seejuures ei tohi aga viivitada inimese voolu alt vabastamisega, sest aeg on määrava tähtsusega. Kui seadet ei saa välja lülitada, tuleb kasutada muid vahendeid.

Pinged kuni 1000 V. Kasutada kuivi riideid, puust keppi, latti, mis ei juhi elektrit. Niiskeid riideid ja metallesemeid kasutada ei tohi. Võib võtta kinni kannatanu kuivadest riietest, näiteks pintsaku hõlmadest, kuid parem mitte puudutada keha. Käte isoleerimiseks võib panna kätte dielektrilised kindad või mähkida käte ümber salli, särgi, kummimantli jne. Enda isoleerimiseks võib tegutseda ühe käega.

Pinged üle 1000 V. Kasutatakse dielektrilisi kindaid ja keppi või tange, mis on selle pinge jaoks ette nähtud.

31/08/2015

EL-TIRAS OÜ on kodumaisel kapitalil põhinev ettevõtte. Kogemus on üle 10 aastat. EL-TIRAS OÜ tegeleb elektripaigaldiste ehitamise, renoveerimise ja projekteerimisega. Pakkume teenuseid kõikide elektritööde tegemiseks (tootmishoonetes, kontorites, eramajades ja korterites). Elektripaigaldise ehitust teostame B pädevuspiirkonnas (

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Tallinn
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