why do motors burn out?
I understand why adding parallel loads to a power source
means more current moves through the circuit, and can
destroy circuit elements by overheating.
What about when you have a vaccuum cleaner intake flush
against a floor, a room fan sitting directly against a wall,
or a power drill trying to drill through something too hard?
How much current will a 5 HP delta connected motor at no
load will take?Is tat need a starter
How can claculate to attain the desired PF in the line (
HOW Much KVAR is required ) Pls Give the formula? Equate
Petrochemical 0 1
how to calculate sizing of NGTR (Transformer rating,Loading
resistor value and Current rating of resistor) and what is
the X/R ratio. Details : 11kV,Capacitance 1.73532 micro
farads,40kA for 1sec. 0 1
What will happened. if we feed 3phase supplay to the stater
with out insert the rotor. How much current will flow
through the stater winnding? Equate Petrochemical 0
What is required of exietation to the alternater. 0
why star point of HT motor not earthed? Equate
Petrochemical 0 1
Why we are getting low voltage in star connection? Equate
Petrochemical 0 2
What's ND relay & it's functions? Equate Petrochemical
How instantanious short circuit current is calculated? its
formula? Equate Petrochemical 0 2
What is servo Motor? What's the advantages of this motor
over Induction motor? Equate Petrochemical 0 2
What is core CT & it's function? Equate Petrochemical 0
what is meant by star/delta voltages as 440/220 in a 3
phase induction motor, and why it should be connected on
STAR IN 3 PHASE SUPPLY L & T 0 4
What is required of exietation to the alternater. KNB 1
what is the design voltage for 6.6KV 2000 KVAR HT
capacitor? Consultancy 0 3
Pls explain about vfd control?Where it is used, Give some
example? siemens 1 22
Please explain me abt PQ diagaram in the power sector.
Why efficiency of generator is higher than motor at a
For group 1 , 2 whather i have to prepare my technical or
general studies etc?
and im graduate in ee engg. for wht posts im eligible for?
please tell me!
what is meant by residual over voltage & residual earth
i want to get some knowledge about RRB
1- what is minimum cut off
2- wht portion is major portion .
3- can any body provide Sample paper.
thanks & regards