Sodium Vapour Lamp: Unterschied zwischen den Versionen
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| − | Sodium Vapour Lamp consists of a discharge tube | + | Sodium Vapour Lamp consists of a discharge tube produced from a heat resistant glass, containing a small amount of metallic sodium, neon gas and two electrodes, Neon gas is added to begin the discharge and to develop adequate heat to vaporize the sodium. Since [http://newelectroniccigarettereview.com/ close window] of law pressure inside the tube, a sufficiently extended tube essential to acquire a lot more light. To lessen the all round dimension of the lamp, this tube is usually bent into U-shape.<br><br>The light produced by this lamp is yellowish which is made at its optimum pressure of about [http://enterthecabin.com/coupons/coupon/vapor4life-coupon-code/ vapor4life [http://areasonablealternative.com/ smokeless cigarettes reviews] coupon] .004mm of mercury. This pressure is obtained at a temperature of about 280 C and so it becomes essential to preserve this temperature. For this goal the U-tube is enclosed in a double walled flask to stop shed of heat. The double walled flask is interchangeable and can be fitted on to an additional U-tube. While replacing the inner U-tube a single have to be very cautious since if it is broken and sodium comes in contact with moisture, it could outcome in fire.<br><br>All electric discharge lamps call for a higher voltage at the time of starting and low voltage throughout operation. Generally, sodium vapour lamps are operated by a high leakage reactance transformer. At starting a high voltage of about 450 volts is applied across the lamp which is sufficient to start the discharge. When the lamp is completely operative right after ten - 15 minutes, the voltage across it falls to about 150 volts. Due to the fact of the high reactance of circuit, the energy aspect is low and therefore a p.f improvement capacitor is connected.<br><br>The efficiency of a low pressure sodium vapour lamp is extremely high (about 40 - 50 lumens/watt) and it produces a light of specific wavelength getting yellow color. Sodium lamps are primarily employed for street, high way and airfield lighting exactly where color distinction is not so necessary. |
Version vom 18. August 2012, 10:12 Uhr
Sodium Vapour Lamp consists of a discharge tube produced from a heat resistant glass, containing a small amount of metallic sodium, neon gas and two electrodes, Neon gas is added to begin the discharge and to develop adequate heat to vaporize the sodium. Since close window of law pressure inside the tube, a sufficiently extended tube essential to acquire a lot more light. To lessen the all round dimension of the lamp, this tube is usually bent into U-shape.
The light produced by this lamp is yellowish which is made at its optimum pressure of about vapor4life [http://areasonablealternative.com/ smokeless cigarettes reviews coupon] .004mm of mercury. This pressure is obtained at a temperature of about 280 C and so it becomes essential to preserve this temperature. For this goal the U-tube is enclosed in a double walled flask to stop shed of heat. The double walled flask is interchangeable and can be fitted on to an additional U-tube. While replacing the inner U-tube a single have to be very cautious since if it is broken and sodium comes in contact with moisture, it could outcome in fire.
All electric discharge lamps call for a higher voltage at the time of starting and low voltage throughout operation. Generally, sodium vapour lamps are operated by a high leakage reactance transformer. At starting a high voltage of about 450 volts is applied across the lamp which is sufficient to start the discharge. When the lamp is completely operative right after ten - 15 minutes, the voltage across it falls to about 150 volts. Due to the fact of the high reactance of circuit, the energy aspect is low and therefore a p.f improvement capacitor is connected.
The efficiency of a low pressure sodium vapour lamp is extremely high (about 40 - 50 lumens/watt) and it produces a light of specific wavelength getting yellow color. Sodium lamps are primarily employed for street, high way and airfield lighting exactly where color distinction is not so necessary.
