HID lamps have distinct styles, in accordance to the style of lamp and its application requires, may be configured in different forms of ballast circuit, so that you can acquire the most effective matching ballast and lamp. The typically made use of HID lamps for common lighting being a high-pressure mercury lamp, high-pressure sodium lamp and metal halide lamp. High pressure mercury lamp HID lamp is during the earliest growth, steady product functionality, supporting mature ballast circuit. High pressure sodium lamp and metal halide lamp is modern day development of new high efficiency energy-saving light supply, the demands for ballast and lamp has excellent matching, to accomplish far better in depth effect of high pressure sodium lamp and high pressure mercury lamp from the functionality of various, high pressure sodium lamp not only mercury, but in addition filled with sodium, working within the light, sodium and mercury to type storage of liquid sodium and mercury fuel inside the discharge tube cold finish element. High pressure sodium lamp electrical power throughout its lifetime, together with the transform with the lamp voltage alter. The high-pressure mercury lamp (HPML) and various high pressure mercury lamp electrical power adjustments within the lamp voltage fairly remained secure, for the reason that beneath the high pressure mercury lamp mercury vapor stress in saturated problem.

High pressure mercury ballast operating principle: when the electrical power supply is switched on, beloved voltage involving the ignition electrode and adjacent major electrode and include among the 2 major electrodes. Because of the ignition electrode and adjacent electrodes close to, voltage and immediately after concerning the two electrodes created glow discharge, make the tube temperature rise, then between the 2 primary electrodes created arc discharge (breakdown).

Together with the arc discharge among the main electrodes, mercury tube discharge lamp will gradually gasification, secure function. Discharge between the primary electrodes can make visible light and ultraviolet light. Ultraviolet light to stimulate the inner wall with the glass shell with the fluorescent powder, issued a near to the noticeable light of the sun. Simply because ignitor is linked in series using a good deal of resistance, when the principal electrode arc discharge is generated, ignition voltage between the electrode and the adjacent most important electrode to produce glow discharge and consequently ignitor stopped functioning, lamp, quartz discharge pressure mercury vapor in the tube to a, to ensure the lamp is actually a high-pressure mercury lamp making use of the lamp, lights can not quickly started once more, and also to the cooling 5—10MIN. lighting mercury vapor pressure going down, then ignite once more.

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