Installation resistance for whole installation of 16 kva &
25 KVA DTRA
a) Between each conductor
b) between conductor to earth
c) installation resistance for each apparatus, each
conductor to earth
d) earth resistance for the system of earthing
why we use four type of phase angle difference between
pimary & secondry winding of a transformer & where we use
What do you mean by per capita requirement of electrical
energy in india
How would your past experience translate into success in this
What is the use of Surge Capacitor in LAVT?
Hi, Next week Iam appearing RRB exam for section engineer.
So help me to get modal question papers for this position.
Iam very thankful to you. Whether question will be fully
techanical format or general form. Please give me a details
regarding this exam.
at work we have a 3 phase motor but on testing one phase isnt getting a reading. it runs 24 hours a day all week. stops and starts well no noise or heating. the phase isnt down to earth.is it just a bad meter reading or not? phases one and three came up with a resistance reading of 0.4 but phase 2 couldnt get anything shows up as open circuit.
Thermal withstand capability under full short circuit
conditions, in terms of number of times of occurrence of
short circuit and corresponding anticipated percentage
reduction in transformer life.
how the CT and PT is connected in the circuit during testing
of transformer explain with diagram
how to avoid Saturation in C.T?
There is any especial requirement for motor to drive
through with VFD?
What will be the size of copper cable (each for 3 phase and
1 neutral) from Service connection Kit-Kat to Panel Board
(i.e. to main switch) for a 6 pole 3-phase AC induction
motor of 200 H.P. capacity? Amp-255 A, Frequency:- 1450 rpm.
To prove the capacity of a 10MVA transforemr with 6.5%
impedance by a short circuit test how much power is needed
to inject an impedance voltage if we have to arrive for
its rated current?
ACCORDING TO IEC WHAT SHOULD BE THE MINIMUM HEIGHT OF G.I.
STRUCTURE OF CT, PT, ISOLATOR, LA?
Why do we use copper cable for HT Supply and why not