Three Phase Voltage Unbalance – Causes, Effects & Mitigation
Voltage unbalance in a three phase system is a condition when the magnitude of at least one phase voltage is not within the acceptable limits of nominal voltage. There are …
Cable Shield and Outer Sheath Grounding (Earthing)
Cable shields and the metallic sheath or armor need to be solidly grounded on at least one point in order to operate at or near ground potential at all times. …
Principles of Differential Relaying
I attended a seminar on “Principles of Differential Relaying” yesterday at the Engineers Australia (Queensland Division) Hawken Auditorium presented by Patrick Arendse, Specialist Engineer Hydro Tasmania Consulting. The Principles of …
Three Hours Rotating Brown out
As I have previously discussed, IMHO, the current power crisis got some political influence. It is summer time, power demand is high, no argument on that, but as an Engineer, …
Hazards of the CLEM 7 Tunnel
Despite the advantages of the CLEM 7 tunnel, there are hazards that we need to watch out when using the tunnel. Speed limit ensure that you drive within the speed …
Phase Shifting Transformers to Cancel Harmonics
When there are several non-linear loads of equal ratings in a power systems, the use of phase shifting transformers could help cancel harmonics. After harmonic filters, phase shifting transformers are …