3kV 10ka D52*H20 Metal Oxide Surge Arrester Rheostat (52mm Diameter)

 3kV 10ka D52*H20 Metal Oxide Surge Arrester Rheostat (52mm Diameter)

Uchi Electric can provide high voltage varistor for high power and high voltage AC & DC applications, these devices will extended the lifetime of the critical components.

• A Varistor (or voltage-dependant resistor) is a component that varies its electrical resistance as the applied voltage changes. At low voltage they have a high electrical resistance and at high voltage a low electrical resistance. In a system they are ideal for diverting surge voltages and spikes away from critical components.

• Metal Oxide Varistors (MOVs) are made from zinc oxide and other metal oxides placed between two metal plates or contacts. The functions and applications of these components are similar to standard varistors.

Zinc oxide based metal oxide varistors (MOV) are widely used electrical surge protection components. Modern high power, high-density electronics post more requirements such as smaller footprints, higher current density and higher nonlinearity on MOVs. Such requirements can no longer be satisfied by commercially available MOVs due to their limited voltage capability, high leakage current and mechanical cracking related reliability issues, most of which are associated with the presence of non-uniformity, defects and coarse grain in their micro-structures. New formulations and processes have been developed to overcome such limitations. This work has identified compositions that can be sintered at relatively lower temperatures than typical commercial MOVs, but with largely improved I-V characteristics due to refined and uniform microstructure. These compositions show not only high breakdown voltages of up to 10 kV/mm with low leakage current, but also a large nonlinear alpha coefficient of great than 50 at high fields, a measure of the speed of the transition from insulating to conducting state and effectiveness of over-voltage protection. The demonstrated breakdown strength of greater than ten times higher than commercial MOVs, along with much higher nonlinearity, will enable MOV miniaturization, high voltage surge protection, and open up new areas of application.

Product Information:

Product name: High voltage varistor for power station

Type: varistor D52*H20mm

Material: Zinc oxide

 

Applicantion for Arrester Classification SL (IEC Standard)

Applicantion for Arrester Classification SM (IEC Standard)

Applicantion for Arrester Classification SH (IEC Standard)