Surge Protective Devices
Surge Protective Devices (SPDs)
Surge overvoltages are caused by a variety of factors, the main ones being direct lightning strikes
and indirect lightning strikes, or even transient overvoltages caused by switching devices that have inductive or capacitive components. These can damage electrical equipment, and we can prevent this by installing Surge Protective Devices (SPDs) in the electrical cabinet.
US 
TH 
