Generator loss of exitation protection

Thread starter Josh111
Start date Jul 26, 2009
Tags

Generator Loss Protection

AI Thread Summary

To protect a generator from loss of excitation, a reverse KVAR relay is being considered. The placement of the current transformer in relation to the automatic voltage regulator (AVR) connection to line voltage is questioned. It is clarified that the location of the measuring current transformer does not matter if there is no load branch present. Therefore, both upstream and downstream placements are acceptable. Proper implementation of the relay can effectively safeguard against loss of field issues.

Jul 26, 2009

Josh111

I am trying to protect a generator fro loss of field with a reverse KVAR relay. My question is does a reverse KVAR relay's current transformer need to be upstream or downstream of AVR's connection to line voltage? (AVR is automatic voltage regulator) Does it matter at all.

Engineering news on Phys.org

Aug 1, 2009

m.s.j

No, location of measuring current transformer is not matter if you have not any load branch.

Thread 'When 50,000 volts go through a wire at 5,000,000 FPS - The Slow Mo Guy'

View full post »

Thread 'Weird near-field phenomenon I get in my EM simulation'

I recently made a basic simulation of wire antennas and I am not sure if the near field in my simulation is modeled correctly. One of the things that worry me is the fact that sometimes I see in my simulation "movements" in the near field that seems to be faster than the speed of wave propagation I defined (the speed of light in the simulation). Specifically I see "nodes" of low amplitude in the E field that are quickly "emitted" from the antenna and then slow down as they approach the far...

View full post »

Thread 'EMF (Electromagnetic Field) & EHS (Electromagnetic Hyper Sensitivity)'

Hello dear reader, a brief introduction: Some 4 years ago someone started developing health related issues, apparently due to exposure to RF & ELF related frequencies and/or fields (Magnetic). This is currently becoming known as EHS. (Electromagnetic hypersensitivity is a claimed sensitivity to electromagnetic fields, to which adverse symptoms are attributed.) She experiences a deep burning sensation throughout her entire body, leaving her in pain and exhausted after a pulse has occurred...

View full post »