Today is...
Wednesday, October 7, 2015
Welcome to, the global online
community of automation professionals.
Featured Video...
Featured Video
Watch an animation of a conveyor stacking operation demonstrating the use of a move on a gear command.
Our Advertisers
Help keep our servers running...
Patronize our advertisers!
Visit our Post Archive
125 V DC Ground Impedance Calculation in GE Mark IV Speedtronic
Ground Impedance calculation & display on Mark IV Screen of GE Speedtronic.

I wish to know how the Ground Impedance is calculated & displayed on Mark IV Screen of GE Speedtronic. I also want to understand Rung Display of Ground Impedance alarm.