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High Voltage Resistor
The obstructive effect of a conductor on electric current is called the resistance of the conductor. High-voltage resistors are the most widely used components in all electronic circuits. They are mainly used as voltage dividers and bleeder resistors in high-voltage devices, with an operating voltage of 10～100kV, a slender and large shape, and a power of up to 100W. High-voltage resistors are usually made of glass glaze film and synthetic carbon film.
A high-voltage resistor refers to a resistor that works under a high voltage of 1000~35000 volts, with a resistance value as high as 10¹¹ ohms. To withstand extremely high voltages, high-voltage resistors must have a very high resistance value and a large power dissipation. To prevent electrical breakdown, a slender substrate with high voltage resistance must be selected, the resistor film is made into a spiral strip, and the voltage gradient along the length direction shall not exceed 500 volts per centimeter. This type of resistor is made of synthetic carbon film, metal film, and metal glass glaze film. It is used as a voltage divider and absorber in high-voltage devices, and can also be used for the discharge and arc extinguishing of rectifier filter capacitors.