Parallel applications of zinc oxide varistor

TGE metal oxide varistors application is a voltage limiting protection devices. Nonlinear characteristics of the use of zinc oxide varistors, when an overvoltage occurs between the two poles of the varistor, the varistor voltage can be clamped to a relatively fixed voltage value, in order to achieve protection of the post-stage circuit. Varistor TVS diode can be used instead tvs tube, a combination Zener diode and a capacitor.
Varistor circuit IC can be protected and other equipment, to prevent electrostatic discharge, surges and other transient current (such as lightning, etc.) and cause damage to them. Simply use varistors and connected to the protected IC or device circuit, when the transient voltage is higher than a certain value, the varistor resistance rapidly drops, turned a large current, thereby protecting the IC or appliances equipment; when the voltage drops below the operating voltage varistor, varistors high resistance, almost open, and thus will not affect the normal operation of the device or electrical equipment.
Zinc oxide varistor connected in parallel circuit generally used when the voltage across the resistor changes rapidly, resistance short circuit current fuse blows, play a protective role. Metal oxide varistors in the circuit, commonly used in the power supply voltage protection and regulation. Set the multimeter measurement 10k file, table pen connected to both ends of the resistor, the varistor should exhibit marked resistance multimeter, if you exceed this value is large, then the varistor has been damaged. Zinc oxide varistors and protected electrical equipment or components used in parallel. When the lightning over-voltage or transient operating voltage VS circuit occurs, varistors and protected equipment and components withstand VS, due to the fast response of the varistor, it exhibits excellent nanosecond time quickly non-linear electrical properties, then the voltage drop across the TGE Glass Coating varistors rapidly, far less than the VS, on such equipment and components to be protected actual withstand voltage is much lower than the over-voltage VS, so that the equipment and components for Free It was over-voltage shocks.

High voltage gradient zinc oxide varistor formulation and preparation methods

Reasonable formula of TGE metal oxide varistor sizing is preferably the component with the content of the zinc oxide varistor, prepared using the formulation of zinc oxide varistor with up to 350 ~ 600V / mm high voltage gradient, while at the high voltage gradient, oxidation zinc varistor capable of maintaining good nonlinear properties, electrical properties and anti-aging properties, in order to meet the practical application of electronic components, such as arrester miniaturization requirements. The preparation method of zinc oxide varistor resistance of the zinc oxide film sub-component and trace ingredients and mix evenly matched tiny size, reduce the amount of contamination, while the addition of the low-temperature thermal processes during the sintering process leaving the metal oxide varistor basics to form a stable grain boundary structure, help to improve the stability of the zinc oxide varistor and a secondary heat treatment during the phase transition of bismuth oxide, thereby improving the electrical properties of TGE Glass Coating varistors.
Zinc oxide can be inserted to corrosion or food supplement zinc, but the product demanding, especially to control the content of harmful heavy metals.
Zinc oxide itself is not toxic, but can be inhaled zinc oxide particles are harmful.
Zinc smelting industry, preparation of brass, galvanized work are likely to produce zinc oxide smoke.
To prevent smoke, galvanized iron can not be welded directly, you must first remove the surface film of zinc.