The book (Horrowitz) says even if an infeed exists, we can ignore it for the purpose of Setting Zone one, but must consider it for Zone 2 & 3. Why? Whats the latest trend?
How is it really done? It seems you have bi-directional relays at the source bussbar and uni-directional relays at all the other busses looking towards the source. You then have two sets of uni-directional relays looking in opposite directions. When setting do you consider the situation as...
I am looking for guidelines for protecting distribution systtem networks, especially between 11kV (possibly lower) and 66kV. In particular explicit information on when to use fuses or a combination of fuse and circuit breaker.
Thank you.
Can anyone tell me the industry standard for protecting radial networks. Some publications for example base the "pick up" on a fraction of minimum fault current, typically 1/3 and the time dial settings based on maximum fault current. Still others use peak load current for pick up and fault...
I have connected everything to just switch one light. I have programmed it. I am using Moeller PS4-141-MM1, PLC. When I try to transfer the program, there is a complaint about an already existing program (the last programme was for a different task). There is also a complaint about the...
I just thought of a new on Per Unit Power System Analysis thread to finalise a previous discussion hoping also that other academics can benefit from my experience.
I have just finished doing the simulation of a system example by Stagg & Ei-Abiad,shown in his "Computer Methods in Power Systems"...
I am an educator and find that many examples for load flow given in textbooks are in per unit. The software which I use uses physical data (ohms, km MW KV etc)and there is no option in my software for this. I tried to use 1kV, 1Km (impedance is given per km) and 1 MVA so that I would not have...
