I am not very clear about a few things here. 6:08, damage will occur if earth fault current exceeds 10A but then some of the grounding schemes(low resistance grounding) allow 200A/150% of full load current. 6:29, 7:25 a fault occurs in the generator due to insulation deterioration, I don't understand how the fault current in that situation has anything to do with the grounding characteristics.
If a generator is designed with a high resistance grounding transformer the fault current will be limited to say less than 10 amps. This grounding strategy minimizes damage during ground fault condition
good video, i have one doubt at 17.35 minute of the video it is said that "FOR URGENT TRIP SITUATIONS THE PRIME MOVER AND GENERATOR BREAKER MUST BE TRIPPED SIMULTANEOUSLY" WHAT IS MEANT BY PRIME MOVER BREAKER PL EXPLAIN. for example gas turbine generator breaker opening is possible but for prime mover (gas turbine) input power is given through gas control valves. pl explain
THEORY
Overview - 0:14
Typical system - 2:44
Grounding - 5:40
PROTECTION
Introduction - 9:55
Phase differential - 10:19
100% stator Gnd Fault Protection Element - 11:45
Negative sequence Over Current - 14:33
Low Fwd. Power - 16:33
Reverse power - 18:00
Inadvertent Energization - 19:05
AVR Backup - 20:07
- Loss of Excitation Protective Element - 20:11
- Overvoltage Protective Element - 20:51
- Overfluxing Protective Element - 21:26
Governer backup - 21:58
- Under-frequency Protection Element - 21:58
- Over-frequency Protection Element - 22:58
Breaker failure - 23:42
Waw loads of infos
Love it
Thanks for sharing knowledge
God bless you
Very informative video indeed! Thanks for sharing it.
this was a very informative video...pls share the literature (pdf/text) supporting the fundamentals discussed in the video
Very good. Thanks 🙏🙏🙏🙏
Please tell us more about siprotec siemense
I am not very clear about a few things here.
6:08, damage will occur if earth fault current exceeds 10A but then some of the grounding schemes(low resistance grounding) allow 200A/150% of full load current.
6:29, 7:25 a fault occurs in the generator due to insulation deterioration, I don't understand how the fault current in that situation has anything to do with the grounding characteristics.
If a generator is designed with a high resistance grounding transformer the fault current will be limited to say less than 10 amps. This grounding strategy minimizes damage during ground fault condition
@@wapaeptc1264 Thanks for responding.
good video, i have one doubt at 17.35 minute of the video it is said that "FOR URGENT TRIP SITUATIONS THE PRIME MOVER AND GENERATOR BREAKER MUST BE TRIPPED SIMULTANEOUSLY" WHAT IS MEANT BY PRIME MOVER BREAKER PL EXPLAIN. for example gas turbine generator breaker opening is possible but for prime mover (gas turbine) input power is given through gas control valves. pl explain
I think he is referring to Stop valves e.g in the case of steam turbine which shuts the steam supply to the turbine instantaneously