How to Select a MOV (Metal Oxide Varistor) for the I/O Expander (8600)

Question

Accepted Answer

Here are some guidelines for choosing an MOV (metal oxide varistor):

We recommend a 250 mA fuse, so that the fuse blows before the varistor
Expected surges, i.e.: bigger surges = higher rated MOV
Choose one that has a higher rated voltage than your working voltage
Physically dimensions, i.e.: fits in with the wiring at the back of the meter
Environmental considerations, i.e.: is the unit in a location prone to lightning strikes?

Đã phát hành cho: Schneider Electric Việt Nam