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S&C have this very useful calculator on their website that provides fuse coordination including damage curves for transformers. http://www.sandc.com/fsa/fsaa1/(u1nkdt555bngesawsoj2wkmb)/FSAAInit.aspx You will probably need to copy and paste this link so that it works in your browser. Might...

Your findings seem reasonable, although somewhat alarming! It appears that the utility's available fault current is very high, and combined with the poor soil resistivity is leading to a dangerous condition. Under the circumstances, it is unlikely that the quality of the substation ground could...

Tulum is correct. I want to add that in this type of application, you must be careful with armour and shields on the cable. Grounds should not normally pass through the window with the conductor, but if they must, as in the case of stress-cone terminations then the ground lead must be routed...

Whether a contact is shown normally open or normally closed is purely representational of the physical arrangement of the switch in a state in which all parts of the circuit are de-energised. As DPC states, this is a choice of convention, but to choose any other convention would tend to be very...

ControlLogix does seem to be a little susceptable to interferance. I had a problem with analog inputs making wild excursions that did not show up in the actual 4-20mA signal. It was finally traced to a computer monitor in the same building, but not directly connected with the PLC. The noise got...