logging in or signing up ppt on substation equipments tripu008 Download Post to : URL : Related Presentations : Let's Connect Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Copy embed code: Embed: Flash iPad Dynamic Copy Does not support media & animations Automatically changes to Flash or non-Flash embed WordPress Embed Customize Embed URL: Copy Thumbnail: Copy The presentation is successfully added In Your Favorites. Views: 8840 Category: Education License: All Rights Reserved Like it (5) Dislike it (0) Added: December 06, 2010 This Presentation is Public Favorites: 7 Presentation Description No description available. Comments Posting comment... By: gopinathchaudhar (6 month(s) ago) can u please send me this ppt to my mail id..,email@example.com Saving..... Post Reply Close Saving..... Edit Comment Close By: psaikrishna2009 (18 month(s) ago) keka Saving..... Post Reply Close Saving..... Edit Comment Close By: ursravindran (27 month(s) ago) Hi Mr. TRIPURARI DAS GUPTA. Pl send me this ppt to firstname.lastname@example.org. Thanks n Regards – Ravindran Saving..... Post Reply Close Saving..... Edit Comment Close By: ursravindran (27 month(s) ago) Hi Mr. TRIPURARI DAS GUPTA. Pl send me this ppt to email@example.com. Thanks n Regards – Ravindran Saving..... Post Reply Close Saving..... Edit Comment Close By: 9949 (28 month(s) ago) Hi.. pls send this ppt to me at my email id-- firstname.lastname@example.org Thanks & Regards Anil Saving..... Post Reply Close Saving..... Edit Comment Close loading.... See all Premium member Presentation Transcript Slide 1: MAINTAINANCE & PROTECTION AT 400 KV SUBSTATION,MURADNAGAR PRESENTED BY TRIPURARI DAS GUPTA ROLL NO. 0702921110 CONTENT : CONTENT POWER TRANSFORMER CURRENT TRANSFORMER POTANTIAL TRANSFORMER ISOLATOR RELAY CIRCUIT BREAKER BATTERY WAVE TRAP SURGE ARRESTORS EARTH WIRE POWER TRANSFORMER : POWER TRANSFORMER It contains primary winding , transformer coil(inductively coupled coil)& secondary winding. A varying current in the first or primary winding creates a varying magnetic flux in the transformer's core, and in the secondary winding. There are three autotransformer two of them of 315 MVA & one 240 MVA at Muradnagar. CURRENT TRANSFORMER : CURRENT TRANSFORMER When current in a circuit is too high to directly apply to measuring instruments, a current transformer is used. A current transformer has a primary winding, a magnetic core, and a secondary winding. The alternating current flowing in the primary produces a magnetic field in the core, which then induces current flow in the secondary winding circuit POTENTIAL TRANSFORMER : POTENTIAL TRANSFORMER When voltage in a circuit is too high to directly apply to measuring instruments, a potential transformer is used. Its principle of operation is same as that of power or current transformer. In this transformer the number of turns in secondary winding is less than primary winding. ISOLATOR : ISOLATOR It is essentially off load device. Isolators are manually as well as automatically operated. These are fitted on both sides of transformer, circuit breaker or any equipment. RELAY : RELAY A relay is a fault sensing device on power system. Many relays use an electromagnetism for switching mechanism. Other types of relays are –solid state relay, microprocessor based relay and Buchholz relay. CIRCUIT BREAKER : CIRCUIT BREAKER A circuit breaker is a fault clearing device. It is an automatically-operated electrical switch designed to protect an circuit from damage caused by overload or short circuit. Unlike a fuse, which operates once and then has to be replaced, a circuit breaker can be reset (either manually or automatically) to resume normal operation. BATTERY : BATTERY At 400 KV substation two sets of 220v & one set of 48 v . The battery charging equipments comprises of a float charger and a boost charger. Stabilization output voltage is provided in the float charger to float the battery at the correct level. The battery can be boost charging after a prolonged mains failure by the boost charger. WAVE TRAP : WAVE TRAP It connected is series with power line. It is basically an inductor of rating in millihenry. It blocks the high frequency carrier waves (24 kHz to 500 kHz) and let power waves (50 Hz - 60 Hz) to pass through. SURGE ARRESTORS : SURGE ARRESTORS The protection against transient voltage surges is provided by surge arrestors. They are usually connected between phase and ground. Surge arrestor discharges current impulse surge to earth and dissipates energy in the form of heat. EARTH WIRE : EARTH WIRE Earth wire in EHV transmission lines is used to provide safeguard against lightening other transient surges and efficient operation of protection system under fault condition. Slide 13: THANK YOU You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.