Energy cooperation scheme of surge protection device

In order to enable the surge protection device to effectively exert its current-discharging and voltage-limiting functions, the surge current caused by lightning or operation will be introduced safely into the earth, so that the electronic power facilities can be better protected, it is necessary to do a good job of energy conduction cooperation between all levels of surge protection device. The main methods of energy collaboration for surge protection devices are:

1 Volt-ampere characteristic

Based on the static volt-ampere characteristic of surge protection device, this scheme is suitable for the cooperation between voltage-limited surge protectors. This method is not particularly sensitive to the current waveform and does not require decoupling elements. The scattering impedance on the line itself has a certain decoupling effect.

2 Using specialized decoupling components

In order to arrive at the cooperative intent, the coupling element with sufficient surge tolerance can be used as the decoupling element (in which the resistor is primarily used in the information system and the inductor is primarily used in the power system) . If inductor decoupling is chosen, current steepness is the decisive parameter. The larger the inductance and current gradient, the easier it is to accomplish the energy cooperation.

3 Work with triggered surge protection devices

Trigger surge protection devices can be used to implement a cooperative approach between devices. The electronic trigger circuit of the triggered surge protection device shall ensure that the energy tolerance function of the subsequent collaborative surge protection device does not exceed.

As long as the surge over-voltage and over-current of all concerned, the energy dissipated by any one of the surge protection systems does not exceed its respective tolerance function, the energy cooperation can be completed. The discharge function of the superior surge protection device shall be higher than that of the later. The coupling element is selected as the coupling element, and the inductance can be scattered by connecting wires between the two-stage surge protection devices. The voltage limit of the final primary surge protection device shall be less than the withstand voltage of the protected device.