Surge protective device – do you know its types?
Frequently Asked Questions
What are the three types of SPDs based on working principle?
The three types are voltage switch type, voltage limiting type, and combination type.
What is the difference between Class I and Class II surge protectors?
Class I surge protectors withstand large impact currents from direct or induced lightning strikes with a 10/350 μs waveform, while Class II handle medium amplitude surges from indirect lightning or switch operations with an 8/20 μs waveform.
What is a metal oxide varistor (MOV)?
MOV is a clamping device made of metal oxide (mainly zinc oxide) with nanosecond response speed, used as a surge suppression device.
When should a gas discharge tube (GDT) be used?
GDT is used for surge protection where the device enters a short-circuit state when breakdown voltage is reached, suitable for high surge energy applications.
What are the application scenarios for power protectors?
Power protectors include AC power protectors, DC power protectors, and switch power protectors, used for protecting power supply systems.
