Why Lightning arrester used? Can we use piece of iron as a
core material of transformer, if No, why? In CRGOSS
material what is meaning of cold rolled grain oriented? Why
Impegrenation of Transformer is done? Properties of
Insulator? what is phase angle? Testing of transformers
(Routine & Monthly)?
Answer Posted / rahul thakur
Lightning arrester is used to provide path to unwanted excessive currents due to lightning strokes,to the earth which is nearly equivalent to zero potential.
Iron may be used but it will lead to high reluctance path and hence a greater losses like hysteresis loss and eddy current loss.
Cold rolled grain oriented means that if the path of flow of magnetic field is along the rolling direction,minimum reluctance is offered.
phase angle is the angle by which the emf induced in the secondary side lags the current.
Is This Answer Correct ? | 13 Yes | 0 No |
Post New Answer View All Answers
Why are the cores of large transformers built up of circular transactions ?
why moisture formation found in XLPE Armoured cable outer sheath
can we synchronize star system generators with delta system transmission line ? and how ?
what is sustainable current of any conductors . a bare busbar or pvc cable has different sustainable current .
how to choose cable size with respect to load? how to convert cable size in mm2 to sq.mm?
3- What is the target from Zero Impedance, Single Phase Imp., S/C Imp. and magnetic balance tests?
what reactive how to maintain
Does the direction of rotation of d.c. Shunt motor would get reversed if the armature current and field current both are reversed?
Define availability (operational)?
What is the effect on 3phase induction motor if current setting knob of DOL kept at minimum current?
Dear all: Recently we got a question about Interface between PMS and SAP-PM.once we got a update message from PMS.we should set the deletional flag for functional location in SAP system.Is there any FM or BAPI to use?There are only functional location create and change provided by SAP. Best regards!
ho can we calculate the conductor insulation value according to their ratings like voltage,current etc.how insulation value related with voltage,current and power of amachine
why in a swquence network representation, the negetive sequence generated voltage is taken as zero?
What is mean by hot and cold loop testing? What is the difference between them?
why we use single core 630mm2 cable for transformer secondary side