1 More Next Blog» Create Blog Sign In Electrical Engineering It is very helpful blog for student of electrical student Home jobs Results Wordpress GTU SUMMER Time table 2015 Reference Books Lab Manual Pages Sunday, 21 September 2014 TYPES OF BUS BAR SYSTEM TYPES OF BUS BAR SYSTEM 1 Single Busbar System Home Diploma Electrical GTU Old papers Reference Books For Electrical Engineering Energy conservation technics and audit Single busbar system is as shown below in figure Rochester Electronics 100% Authorized Source of Supply Largest inventory of IC's & Die Single Busbar System a. Merits 1. Low Cost 2. Simple to Operate 3. Simple Protection b. Demerits 1. Fault of bus or any circuit breaker results in shut down of entire substation. 2. Difficult to do any maintenance. 3. Bus cannot be extended without completely deenergizing substations. c. Remarks 1. Used for distribution substations up to 33kV. 2. Not used for large substations. 3. Sectionalizing increases flexibility. 2 Main & Transfer Bus bar System Main & Transfer Bus is as shown below in figure Home Home jobs related electrical G.T.U Results R.T.U Results Labels Electrical Instrumentation (5) Electrical Traction And Control (1) electrical workshop (10) Energy Conservation Techniques (12) Installation commissioning and maintenance (1) Blog Archive April 2016 (1) March 2016 (1) a. Merits 1. Low initial & ultimate cost November 2015 (2) July 2015 (1) June 2015 (2) 4 Double Bus bar with Double breaker System Double Bus Bar with Double breaker system is as shown below in figure a. Merits 1. Remarks 1. Extra buscoupler circuit breaker necessary. 6. 5. 4. High exposure to bus fault.2. May 2015 (1) 3. Has flexibility in permitting feeder circuits to be connected to any bus 3.6kV. 3. 2. Demerits 1. Bus protection scheme may cause loss of substation when it operates. Demerits 1.3kV Substations. Remarks Most widely used for 66kV. Line breaker failure takes all circuits connected to the bus out of service. Each has two associated breakers 2. November 2014 (5) October 2014 (1) September 2014 (3) August 2014 (1) 3. Half of the feeders connected to each bus b. June 2014 (1) c. c. 4. Any breaker can be taken out of service for maintenance. Potential devices may be used on the main bus. 3. Requires one extra breaker coupler. Most expensive . April 2014 (1) 3 Double Bus bar Single Breaker system August 2013 (3) Double Bus Bar with Double Breaker is as shown below in figure October 2013 (3) September 2013 (3) July 2013 (4) June 2013 (6) April 2013 (2) March 2013 (1) February 2013 (1) November 2012 (2) October 2012 (4) September 2012 (4) Total Pageviews 1 16361 a. High reliability b. February 2015 (1) b. 2. Switching is somewhat complex when maintaining a breaker. Fault of bus or any circuit breaker results in shutdown of entire substation. Used for 110kV substations where cost of duplicate bus bar system is not justified. High flexibility 2. 132kv. 220kV and important 11kv. Bus couplers failure takes entire substation out of service. Any breaker can be taken out of service for maintenance. Demerits 1. Merits 1. Either main bus can be taken out of service at any time for maintenance. Demerits 1. c. c.2. Simple operation. Requires 1 1/2 breaker per feeder. 4. 5 Double Main Bus & Transfer Busbar System Double main bus & transfer bus system is as shown below in figure a. High cost due to three buses c. Demerits 1. One and half breakers per circuit. All switching by breaker. 6. Remarks . Selective tripping. 7 RING OR MESH ARRANGEMENT a. ring gets separated into two sections. Merits 1. Breaker failure on bus side breaker removes only one ckt. Most flexible in operation 2. Remarks 1. Bus fault does not remove any feeder from the service b. Any breaker can be removed from maintenance without interruption of load. All switching done with breakers 5. Merits 1. 3. 7. These VT’s may be required in all cases for synchronizing live line or voltage indication c. 5. Highly reliable 3. Would lose half of the circuits for breaker fault if circuits are not connected to both the buses. hence higher cost 2. If fault occurs during bus maintenance. high power. 4. Used for 400kV & 220kV substations. Requires VT’s on all circuits because there is no definite voltage reference point. 6 ONE & HALF BREAKER SCHEME a. Autoreclosing and protection complex. Breaker failure during fault on one circuit causes loss of additional circuit because of breaker failure. b. 2. Preferred. Remarks 1. Flexible operation for breaker maintenance. Preferred by some utilities for 400kV and 220kV important substations. Demerits 1. 2. b. Merits Bus bars gave some operational flexibility. Not used for usual EHV substations due to high cost. 3. Used only for very important. Any breaker can be removed from maintenance without interruption of load. Each circuit fed by two breakers. From service 4. 2. Remarks 1. no isolator switching required 6. 2. EHV substations. design of substation. electrical power distribution. electrical. Most widely used for very large power stations having large no. load . SO IT CAN HELP ME TO IMPROVE THIS BLOG.. Good info . PLEASE GIVE YOUR FEEDBACK IN COMMENT SECTION ... Reply madhav prasad 7 May 2016 at 03:30 Pls explain in understandable language rather than writing in bullet points. Reply Enter your comment. learned new info about busbar. It's difficult for students like me...plz upload power systems problems . diploma in electrical engineering... Reply Replies Nirav Barbhaya 21 May 2016 at 01:31 Dear MADHAV this are the best method to understand this type of complicated theory. hope you under stand but next time i consider that things that you have pointed out. busbar.your blog is good . busbar arrangement... so we can remember this type of points and explain in brief if needed anywhere.. electrical power..... Reply madhav prasad 7 May 2016 at 03:30 Pls explain in understandable language rather than writing in bullet points.i'm preparing gate 2016 electrical engineering ..network theory problems Reply thirumalai kumar 14 February 2016 at 18:53 I was searching for types of busbar(slack. It's difficult for students like me... Reply Nirav Barbhaya 18 February 2016 at 04:17 Thanks for your appreciation this will lead me to share more things related to electrical engineering . Good work admin. substation Duplicate Board Result Arrangement Badges Merit Time Table Breaker Circuit Diploma Duplicate Lab Manual Board Result 3 Double Merit 6 comments: Sarayu Chowdary 5 January 2016 at 02:49 hi i'm sarayu from hyderabad . Comment as: Publish Unknown (Google) Preview Sign out Notify me .. gen) details and landed in this page.. Posted by Nirav Barbhaya at 08:57 +1 Recommend this on Google Labels: arrangement. of incoming and outgoing lines and high power transfer. Newer Post Home Older Post Subscribe to: Post Comments (Atom) Translate Select Language Powered by Translate Google+ Badge Gadget This content isn't available over encrypted connections yet. . Powered by Blogger.Get Gmail For Your Domain Custom Business Email Address. Nirav Barbhaya Follow Simple template. Start With Free Google Apps Trial.
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