This is not the first time I have heard of this problem. In my experience with moulded case circuit breakers, the only thing that will turn them "off" is a deliberate switching action.
We provided this advice to an industrial client and after they took action to prevent human intervention the...
Thanks to "busbar", dpc and scottf. I now have all the information I need (and also a much deeper understanding of CT and CT error compensation).
Perhaps it's time we clubbed together and wrote a short definitive paper on the issue? Most of the texts appear to be a billion years old and with...
Thanks - have checked out the GE web site. The URL for the Instrument Transformer Application Guides is
http://www.geindustrial.com/cwc/products?pnlid=5&famid=42&catid=99&id=insttran-ov&typeId=2&lang=en_US
An example of CT correction is provided in...
I am trying to find a reference which explains the process for calculating the ratio and phase angle error of a metering CT, based on:
- Calibration certificate data at two burdens (VA1, VA2) both at the same power factor
- The actual burden and power factor of the load
I have several metering...
