ballast lamp - normal incandescent lamp used as a ballast resistor, current limiter, alarm, or to stabilize a discharge lamp
a. ballast resistor - a resistor inserted into a circuit to swamp or compensate changes, e.g. those arising with temperature fluctuations. One similarly used to swamp the negative resistance of an arc or gas discharge. Also known as ballast tube. b. ballast resistor - a resistor manufactured from material having a large positive temperature coefficient of resistance. It is constructed so as to have a substantially constant current over a range of voltage and with a circuit to absorb small changes in the applied voltage and stabilize the current in the circuit. One consisting of a resistor seated in an evacuated or gas-filled envelope of glass or metal is called a ballast lamp.
Lahenduslampides, milles elektrienergiat muundab optilise kiirguse energiaks gaaslahendus, on stabiilseks talitlemiseks vaja ballasttakistit vm voolupiiramisvahendit. Voolupiiraja, muundur, süütur jm abielemendid võivad paikneda ka lahenduslambi ja toiteahela vahelises liiteseadises, kompaktlampide puhul lambi sees.
Fluorescent lamps without integral ballast (those requiring a ballast and/or other control gear to connect them to the mains) ...
The ballast used for the type approval of the light source shall be marked with type and trade mark identification and with the rated voltage and wattage, as indicated on the relevant lamp data sheet.
