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What is the lowest voltage an inverter can handle on a three phase system (460VAC) before it starts to fail? I have recently seen more and more inverter failures and I believe it is related to our incoming power. I need to know how low can the voltage drop before it fails.

I know there are lots of TVSS or SPD's (Transient Voltage Surge Suppressor or Surge Protection Device) on the market. But there has to be one that tops them all. I want to protect a service that has 480/277V,WYE, 3ph, 4W. I am looking at the incoming power switchgear which is 4000A. I could go...

Are there any types of bearing monitoring systems that are not too expensive but provide early detection warnings as feedback?

What is the best method to utilize to monitor 125HP and up Fan Bearings on a shaft of 6 inches to prevent unwanted shutdowns due to bearing failures?

That is an idea but the true problem is that we have about 50+ E-Stop PB's on this line that are not illuminated and the system will only display that an overall E-Stop is active. This is the problem with nuisance trips is just finding them quickly once they are activated.

thread301-181143 I am in a similar situation with the E-Stop delima. I need to find supporting information specifically about using guarding around E-Stops like the "U" shaped protection guards. Can anyone help me with this? I don't think that it is legal to put guarding around an E-Stop...