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E-mail
736057965@qq.com
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Phone
18827403110
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Address
Shisheng Road, Hanyang District, Wuhan City
Wuhan Leichuang Technology Development Co., Ltd
736057965@qq.com
18827403110
Shisheng Road, Hanyang District, Wuhan City
1. Working principle of lightning arrester: safe discharge of lightning energy
Lightning rod vs lightning arrester: Lightning rods (lightning rods) are mainly used to protect buildings themselves, attract direct lightning strikes, and safely guide them into the ground. Lightning arresters are mainly used to protect electrical and electronic equipment inside buildings. They defend against induced overvoltages and surges generated by lightning (including surges transmitted through the ground, power lines, or remote ends of lightning strikes).
Core task: Release and pressure limiting
Discharge: When a high voltage surge caused by lightning induction occurs on the line, the lightning arrester will quickly (in nanoseconds) transition from a high impedance state to a low impedance state, providing a low impedance grounding path for the surge current and discharging the vast majority of dangerous energy to the ground.
Voltage limiting: While discharging current, the lightning arrester will clamp the surge voltage below its own safe level (protection level Up), ensuring that this voltage is lower than the tolerance of the protected equipment.
Key components: Common core components of lightning arresters include:
Varistors: voltage sensitive, conducting beyond the threshold, adept at absorbing energy.
Gas discharge tube: Voltage triggers gas ionization conduction, with a large flow rate and slightly slower response.
Transient suppression diode: extremely fast response, precise clamping voltage, but relatively small current flow.
Spark gap: used for primary protection of high flow capacity.
Modern lightning arresters are typically designed as a combination of these components to leverage their respective advantages and achieve optimal protection effects.