What Is a Spark Gap?

Spark gap is one of the internal components of sparkgap valve type arrester, which is composed of multiple small gaps in series.

Spark gap

Right!

Spark gap is one of the internal components of sparkgap valve type arrester, which is composed of multiple small gaps in series.

Chinese name

Spark gap

Foreign name

Spark gap

Make up

Multiple small gaps in series

Nature

Sparkgap valve arrester internal components

. Each small gap is punched with a copper sheet and separated by a mica gasket with a thickness of 0.5 to 1 mm. One pole of the gap picks up the electrical line and the other pole is grounded. When the line is at a normal power frequency voltage, the gap will not be broken down and the line will be separated from the ground. When a dangerous overvoltage occurs in the power system, the spark gap is broken down, and the lightning current flows into the ground through the valve-type resistor. When the overvoltage disappears, the spark gap cuts off the power frequency freewheeling and returns to its original state.