Electrical Machines and Equipment
Electrical Machines and Equipment
Electrical Machines and Equipment
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<strong>Electrical</strong> Technology Department<strong>Electrical</strong> <strong>Machines</strong> & <strong>Equipment</strong>sDetailed Theoretical ContentsHours Contents Related Tasks Types of protective relays (electromagnetic, thermal,induction, <strong>and</strong> digital).i. Over current relaysCont.ii. Directional relaysiii. Distance relaysiv. Over <strong>and</strong> under voltage relays Requirements of power system protection (sensitivity,speed of operation, reliability, main <strong>and</strong> backupprotection, etc)5. Protection of generatorBasic knowledgeA4, I11, J4,A5, B5, B7, B8,D9, G9, I4, I10,I11, J4,F53 Over load protection Stator winding protection Field winding protection Phase to phase fault protection Reverse power protection Over speed protectionA8, C7, C8,F5, J3, J436. Protection of power transformers Over load protection Transformer winding protection against differentfaults Protection using Buchholz relay Differential protectionA8, C7, C8,F5, J3, J437. Protection of electric motors6. Over load protection using thermal relays Locked rotor protection Unbalanced phases protection Protection against single phase operation Protection against earth faults. Under voltage protection Protection against short circuit between phasesA8, C7, C8,F5, J3, J4- 77 -
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