The ground of the ballast is a function grounding or a protective grounding
In daily illumination, the grounding of the ballast is protective.Is fluorescent lamp ballast, ballast resistor) on the current limiting effect and the production of instantaneous high pressure equipment, it is enameled wire on the core of silicon steel production, the iron core coil, open/close the electricity in an instant, can produce high voltage, self inductance on the electrodes at the ends of the tube (filament).This movement is alternating, when the regenerator (bubble) closes, the filament of the lamp passes through the ballast.When open the starter and ballast can produce high feeling on the ends of the tube filament, filament electron bombardment wall of fluorescent powder, repeated several times to break the starter, such movement will be repeated several times, to get through tubes.When lamp normal luminescence, smaller resistance, always keep open state, the starter of the electric current is stable through work lamp, ballast, lamp to normal light.Due to the ballast in fluorescent lamp work, there is always an electric current passes through, so prone to vibration, and fever, so have a ballast of fluorescent lamp, especially the ballast quality is bad, will produce very big voice, use a long time, also easy to burn out.Protective earthing is a grounding for the safety of personal and equipment such as the metal case of the electrical device, the frame of the distribution device and the wire tower.So-called protection grounding is will not be charged under normal circumstances, and after the failure of insulation materials and other cases may be electric appliances metal parts (that is, the phase insulated metal structure parts) and live part with reliable grounding body connected by wires
The purpose of the work grounding is to maintain the stability of the system potential, which is to reduce the risk of voltage from the low pressure system. When the pressure of 10kV is in low pressure, the voltage of the voltage system increases to about 5800V. Protective earthing is a grounding for the safety of personal and equipment such as the metal case of the electrical device, the frame of the distribution device and the wire tower. The so-called protective earthing is will not be charged under normal circumstances, and after the failure of insulation materials and other cases may be electric appliances metal parts (that is, the phase insulated metal structure parts) and live part with reliable grounding body connected by wires a way to protect the wiring. Like the appliances in your home are protected and grounded, so are the ballast.
Protective earthing (1) the electrical grounding In order to prevent electrical equipment insulation damage or leakage current, otherwise don't charged exposed conductive part of charged and cause electric shocks, exposed conductive part of the equipment grounding, known as electric shock proof grounding. This grounding can also limit the high voltage caused by the flow of the circuit or the low voltage line and the device due to high pressure. When the electrical fault is produced, the power of the current protection device is turned off. This ground is also a narrow "protection ground". (2) the ground shall be grounded to prevent lightning from causing shock or property damage. (3) the electrostatic grounding will introduce the static charge into the earth and prevent the harmful effects of static accumulation on the human body and the equipment. Especially in the electronic equipment with a lot of integrated circuits, fault and integrated circuit susceptible to electrostatic effect, after grounding can prevent the damage of the integrated circuit. (4) the grounding of the metal body in the ground underground is used as a sacrificial anode or cathode to prevent electrical erosion of cables and metal pipes
To ensure stable reference potential, the appropriate metal parts in electronic equipment are used as "logical", and the metal base is generally used as a logical place. The grounding of the logical grounding and other analog signal systems is often referred to as dc. (3) shielding grounding to electrical interference sources into the earth, and the inhibition of electromagnetic interference on the influence of electronic equipment, also can reduce the interference effects of electronic equipment other electronic equipment. (4) the signal ground In order to ensure the signal has the stable reference potential and set the ground, such as detection of leakage current to ground impedance measuring bridge and corona discharge loss measuring electrical parameters, such as measurement of grounding.
