"The type 2 SPD is independently connected to both line and neutral internally and is looking for transient voltages, or voltage spikes. Whereas the RCBO is looking for a current in-balance greater than 20mA. The only instance that the SPD could trip the RCBO is when it does come to end of service life it may fail open or closed circuit. If it fails closed circuit the RCBO would trip, as would an MCB.
Aren't their SPDs also connected to PE? with the possibility of >>20mA flowing from L/N to PE when dealing with a surge? “I'm not entirely convinced” is perhaps the polite reply!
- Andy.
"The type 2 SPD is independently connected to both line and neutral internally and is looking for transient voltages, or voltage spikes. Whereas the RCBO is looking for a current in-balance greater than 20mA. The only instance that the SPD could trip the RCBO is when it does come to end of service life it may fail open or closed circuit. If it fails closed circuit the RCBO would trip, as would an MCB.
Aren't their SPDs also connected to PE? with the possibility of >>20mA flowing from L/N to PE when dealing with a surge? “I'm not entirely convinced” is perhaps the polite reply!
- Andy.
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