how everybody knows, high voltage are called relays that switch circuits having voltages withhigher 500 V and highest currents. Just thanks to opportunities steer gigantic power, relay are used in RF aerospace applications destination. AT given equipment required compact relays with low radio frequency costs, owning unsurpassed dielectric qualities on the big voltages and capable work on the huge heights under impact tough weather criterion. Not to mention such, extensive usage relay discovered in honey equipment and all kinds commercial applications.
