Properties of Transformer Oil
Properties of Transformer Oil Q. 10 List the properties of transformer oil Water content Acidity Density Flash point Fire point Purity Viscosity Dielectric strength Sludging
Basic Electrical
Meaning of Insulation Resistance
Meaning of Insulation Resistance Q. Explain meaning of insulation resistance. There are various materials in the category of conductor, semiconductor, insulators etc. The materials offer opposition to the flow of current. The opposition is known as resistance. In electrical systems some pans are expected not to allow any current through them. These parts have good … Read more
Procedure for Back to Back Test on Transformer With Circuit Diagram & Advantages and Disadvantages of this Method
Procedure for Back to Back Test on Transformer With Neat Circuit Diagram & Advantages and Disadvantages of this Method Q. Explain the procedure for back to back test on transformer with neat circuit diagram. State advantages and disadvantages of this method. If large transformer are to be tested for determining their efficiency, temperature rise regulation … Read more
Phasing Out Test Carried Out on Transformer
Phasing Out Test Carried Out on Transformer Q. With the help of neat figure explain phasing out test carried out on transformer. Phasing out test : This test is carried out only on 3Φ transformer to identify primary and secondary winding belonging to the same phase. As shown in figure A all the phases of … Read more
Routine, Preventive and Breakdown Maintenance
Routine, Preventive and Breakdown Maintenance Q. Describe routine, preventive and breakdown maintenance with suitable examples. 1. Routine Maintenance : As the name suggests, it is the maintenance as a routine work i.e.daily work so routine maintenance is a overall daily maintenance of the machine. After the stoppage of the machine on the earlier day, the … Read more
Uses of Growler
Uses of Growler Q. Explain the use of Growler. It is a equipment used for finding shorted turns of armature coil or stator / rotor winding.It is essentially a single winding transformer. Low voltage or 230 V. AC is applied to a growler’s winding. Hence A.C. flux is produce. The winding acts as a primary … Read more
Function of Spirit Level
Function of Spirit Level Q. Explain the function of : Spirit level. It is a device to check level alignment.
Uses of Megger
Uses of Megger Q. Explain the use of Megger. It is a device to check continuity, short circuit approximate value of high resistance in MΩ.
Short Circuit Test is Performed on Single Phase Transformer
Short Circuit Test is Performed on Single Phase Transformer Q. Explain how Short Circuit test is performed on single phase transformer. S.C. Test on single phase transformer This is mearly a short circuit test. Generally meters are connected in H .V. side to which a variable voltage can be applied with the help of a … Read more
Qualities of Insulating Material
Qualities of Insulating Material Q. List any six qualities of insulating material. Material should have high resistivity, high dielectric strength, high dielectric constant (permitivity), less dielectric loss. It should be mechanically strong, tough, flexible, viscous. It should be non porous, non-soluble. It should have good machining and moulding properties. It should be heat resistant. It … Read more