Deepakkumar Yadav
Need of Energy Conservation in Transformer Q. State the need of energy conservation in transformer. Transformer is a vital power equipment in a power system, which plays significant role in generation transmission and distribution of electrical energy. Transformer operating efficiency directly affects the costs and benefits of the whole power system. In a typical power … Read more
External Causes of Failure and Abnormal Operation of Equipments Q. What are the external causes of failure and abnormal operation of equipments. External Causes : A 3 – phase machine is supplied with 3-line wires L1 L2 L3. These are called as lines. If the fault is developed in the feeder / Distributor line only two lines will … Read more
Reasons for Developing Electrical and Magnetic Fault Q. Give the reasons for developing electrical and magnetic fault. Electrical Faults : Sr. No. Fault Reasons Remedial measures 1 Wrong electric connections Field winding connections may be wrong. Field-Armature winding connections might be wrong. 3-phase motor phase sequence connection R-Y-B may be wrong. Check the connection. Check … Read more
Transformer Energy Conservation Method After selection of a transformer, adopt a transformer economic operation scheme to arrange operations, make the transformer operate in economic operation interval, economic switching of transformer between each operation mode and economic dispatch between transformer loads, etc. Adopting these schemes can improve transformer operating efficiency and reduce its operation on achieve … Read more
External Causes of Failure of Equipment Q. State external causes of failure of equipment. These causes are external to the machine from supply to the terminal box of the machine. A 3 – phase machine is supplied with 3-line wires L1, L2, L3. These are called as lines. If the fault is developed in the … Read more
Classification of Insulating Material as per IS Q. State the Classification of insulating material as per IS. No. Class Insulating Materials Uses 1 Y/ O Cotton, silk, paper vulcanized fibers wood PVC, VIR etc. Always used with impregnation. 2 A Cotton, silk, paper press, vulcanized fibers wood etc. Impregnated dielectric oil or varnish also some … Read more
Procedure for Cleaning, Washing and Drying of Insulation & Describe the Vacuum Impregnation Method of Varnishing Q. Explain the procedure for cleaning, washing and drying of insulation and describe the vacun impregnation method of varnishing. Methods of cleaning insulation : The failure of insulation takes place due to absorption of moisture. Oil, dust, dirt, excessive … Read more
Internal Causes of Failure and Abnormal Options of Equipments Q. What are the Internal causes of failure and abnormal operation of equipments. Internal Causes : In some unavoidable situation the machine may have to be run “over loaded” for a longer-period which causes temperature rise beyond the permissible limit. During normal working shot-circuit may occur … Read more
Mechanical and Electrical Faults and Causes in Case of Electrical Machines Q. list out the mechanical and electrical faults and causes in case of electrical machines. Mechanical Faults : Sr. No. Fault Reasons Remedial measures 1 Bent shape Drawback in shaft coupling machine to machine or machine to load shaft. Concentric coupling very tight fitting … Read more
Uses of Tool Multimeter Q. Describe the use of following tool : Multimeter. This meter is basically a P.M.M.C. instrument. The coil winding of the movement is very small. A shunt resistance is used for the protection and range extension. It can be used to measure current, voltage, resistance, etc., and hence it is also … Read more