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Paru... were the tests performed by the same testing firm, or were they performed by your own Lab specialists? Regards, Phil Corso

Fathi Hadloul... what are comparable measurements for both machines? Specifically: MVA; MW; MVAr; kV; A; PF (Lag/Lead); Field V; and Field A? Regards, Phil Corso

SSU... the following thread may shed some light on the reason for pre-charging an OHV line: http://www.control.com/thread/1026245456 Regards, Phil Corso

Shaheed... if you are able to synchronize, then both the power connections and PT connections are OK. The problem is with the Neg-Seq Relay's CT secondary connections. I’m unfamiliar with how DIEF couples line voltages to the Neg-Seq current function! I strongly urge you to contact DEIF...

Shaheed... repeating... was the Generator connected to and providing power to 3-phase load at the time the '46' was displaying both pos @ neg-sequence values? Phil

Shaheed... start with CT exchange first. Reur your observation that the '46' relay displayed 100% negative and 0% positive. At the time, was the generator deiveringpower? Phil

Abhishek... would you mind sending me a copy? Phil Corso [ [email protected] ] <b>Moderator's note:</b> message edited to show correct email address.

Shaheed... can you provide additional detail? 1) Neg-Seq relays are typically connected only to CTs; PTs are not required! Is the Relay Hardwire-based or Microprocessor-based? 2) My earlier question was to determine if it operated without current? If so, and it’s hardware-based, then the...

Shaheed… reur observation that Neg-Seq relay displayed 100%... with generator under some load, or with zero-load? Phil Corso

Abdolazim Hasseli... presumably you are providing the Video without legal advice? Phil Corso

Danish... OSHA, The Occupational Safety and Health Standards have the restrictions you seek. Regards, Phil Corso.

It was a lot easier during the 'G'olden years when all we had to do was add a capacitor to the integral-portion of an analog card! Phil Corso

Sanantu... typically off-normal frequency tripping protects auxiliary plant apparatus during run-up and run-down operation. However, when an alternator is tied to an infinite-grid off-normal frequency tripping most likely provides back-up relaying. That is, for the case when primary...

Sanantu... what Protective-Relaying texts or reference books are available to you? Regards, Phil Corso

KS... do you mean the short-circuit level on the 6.6kV level increased from 40 to 63kA? Regards, Phil Corso

Abhishek... Has the Plant's SLD been presented? Regards, Phil

Sajad... are you referring to under-excited operation as related to Impedance-Protection? Regards, Phil Corso

Abhishek... what type of conversion process is involved? For example is it: a) Coal to Syngas? b) Bio-mass to Syngas? c) etc Regards, Phil Corso

Karsten Rasmussen... following are two ways to change speed: o control blade-pitch. o control direction into the wind. If you need a major speed reduction then add blade(s). Regards, Phil Corso!