I agree with the previous post. The classification change when we ventilate according to NFPA 820 would change area rating from Class 1, Div 1 to Class 1, Div 2 or Class1/Div2 to unclassified (the ventilation rates and monitoring requirements vary with type of space). Many instruments and...
First, thank you for the responses on my question. Also, yes it is a single conductor (one per phase) on the primary for transformer differential metering.
Thanks,
Gene
Does anyone know of reference material to indicate the ability to use a conventional CT on a 25 kV shielded cable on a transformer primary cable. I would like to use a 600 volt insulated CT on the shielded cable of a 3750 kVA transformer and an electrical has indicated that it will work but I...
I have had poor results due to resistance properties of stainless steel with chlorine solution (dissolved the level probes in a 12.5 percent sodium hypochlorite solution) and would not be convinced that chlorine would not attack the SS. We needed to switch to titanium for the probes (other...
There is one I have used on Hayward Valve website
http://www.haywardindustrial.com/charts/index.htm
this page has several short lists and one combined with materials and resistance to various chemicals.
I have a client that has a magnetic flowmeter with erratic readings. Recent system changes (move NaOH feed point to upstream of meter) is causing low flow readings. Testing included monitoring flowmeter without chemical and starting chemical feed with as much as a 30 percent drop in flowmeter...
It is not clear what you are trying to alarm. Typically motor starters have a motor overcurrent device that is monitored for a motor alarm. Also a failure to start (motor starter does not provide a run status within a given time frame which results in an alarm), but can also be motor...
