Reliability Analysis - Point to Remember
Reliability Analysis - Point to Remember
(OP)
Hello all,
Im a new member to this forum. Im working in a mining company and it has a pretty decent power distribution system. Now i have been given a project on to look at the system and analyse it on how reliable it is. Like checking for breakers in apt positions, way to by pass power if in case of a maintenance and etc.
So i wanted to ask you people that what are the points i should keep in my mind before starting up the projects.
Any comments and suggestions from anyone who have done this early?
All replies are highly appreciated
Thanks
gokul
Im a new member to this forum. Im working in a mining company and it has a pretty decent power distribution system. Now i have been given a project on to look at the system and analyse it on how reliable it is. Like checking for breakers in apt positions, way to by pass power if in case of a maintenance and etc.
So i wanted to ask you people that what are the points i should keep in my mind before starting up the projects.
Any comments and suggestions from anyone who have done this early?
All replies are highly appreciated
Thanks
gokul






RE: Reliability Analysis - Point to Remember
Please see attached thread.
thread238-197540: A step by step exercise of how to do probabilistic planning
Hope that help.
Good Luck.
Slava
RE: Reliability Analysis - Point to Remember
An example of this may be a pair of Power Distribution Centers joined by a tie breaker. In the event of a feed failure to one of them, the tie breaker may be closed to restore service. The load may have to be curtailed.
I would then look at the implications of a failure of a system with no ready alternate supply.
This would be a starting place.
This is probably an exercise to familiarize you with the plant. You may gain extra points if you include actual loading of the circuits as well as the design loading.
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Reliability Analysis - Point to Remember
Sorry im just an intern and i dont know much of the equipments. Can you tell me what for is a tie breaker used.
thanks,
gokul
RE: Reliability Analysis - Point to Remember
In the event of failure of the normal feed to a bus or PDC, the tie breaker may be closed to feed the load from the other feeder.
In normal operation, tie breakers are open. they are closed only when one feeder is missing either due to a failure or for maintenance. There are often protection and fault current issues if the tie breaker is closed when both feeders are present.
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Reliability Analysis - Point to Remember
RE: Reliability Analysis - Point to Remember
Breakers usually don't care what they are applied to as long as their specifications are not exceeded. So there generally aren't specific special 'tie breaker' breakers.
More likely they may be in a strange place but not a strange type. You may see one in a panel between other panels all by itself, etc.
Keith Cress
kcress - http://www.flaminsystems.com
RE: Reliability Analysis - Point to Remember
In the event that the tie breaker is closed with both buses already energized, the available fault current will approach double, limited by the source impedance.
The equipment is seldom rated for this level of fault and the tie breaker is not closed with both sides energized, except in special cases for a few seconds to take equipment out of service for maintenance. One example of a "TIE" breaker. There are others, often with PDCs.
Keith, was that word meant to be "UNITE" as in "To Join" or "UNTIE" as in "Dislectics UNTIE".
LOL.
Bill
--------------------
"Why not the best?"
Jimmy Carter