Detailed Working Principle And Introduction Of Shunt Type And Choke Type Surge Protectors

surge protective device are essential devices for lightning protection of electronic equipment. They were formerly known as lightning arresters or surge protectors (SPDs). Their function is to limit transient overvoltages entering power lines and signal transmission lines to within the voltage range the equipment or system can withstand, or to divert strong lightning currents into the ground, protecting the protected equipment or system from potential damage.

Shunt or Choke Type

Shunt Type surge protector: Connected in parallel with the protected equipment, it presents low impedance to lightning pulses and high impedance at normal operating frequencies.

Choke Type surge protection device: Connected in series with the protected equipment, it presents high impedance to lightning pulses and low impedance at normal operating frequencies.

Components used in this type of device include choke coils, high-pass filters, low-pass filters, and quarter-wavelength shorts.