if two transformers are placed parallel & both have fault impedance of 50KA will it increase or decrease show example?711
if two transformers are parallel & both have fault short ckt. impedance of 50KA in each case will it increase or decrease show example?1 1631
How many points can we have in AC Circuit? Show by giving suitable example?3 2671
-----------means a source which can supply a constant voltage to aload irrespective of the valu of load resistance.2 2284
What is the electrical difference between Earthing Switch (ES) and Maintenance Earthing Switch (MES)?1 1146
how we calculate the knee point of a protection and metering CT and what is the testing procedure.
HOW WE KNOW IN PHYSICALLY THE CONTACT SURFACE OF A VACUUM INTERRUPTER IS GOOD OR GOING TO DAMAGE IN A VCB AFTER ABOVE 500 TIMES OPERATED.825
Dear sir, I am working in wind mill division , pls explain Pls explain in details with formula My question is Wind speed 3.5 M/s Gen RPM is 1500 ( 25 K/w Production ) Wind speed 12 M/s Gen RPM is 1500 ( 220 K/w Production ) Why in 3.5 m/s generation was low , why in 12 m/s generation was high , Pls dont explain wind force or wind density , that one already i know For the above question RPM was same why the KW was different Answer : 1. Its depends on the density ( Force ) of the air Sir , Pls explain wit Formula sir1 1762
why stay insulator is not used with stay wire for 11kv Lines. Whereas it is used for LT lines ?2 9965
what is invertor supply and raw powersupply
-What should be minimum value of insulation resistance and maximum value of earth resistance at any electrical instillation and what is method of testing the same.
Dear all, I just want to ask an expert on this forum for some insights. For the magnetic balance test, when applied voltage on a Delta-Star transformer e.g. Dyn11, the following relationships apply for HV side: 1. H1-H2 = H2-H3 H3-H1 2. H2-H3 = H3-H1 H1-H2 3. H3-H1 = H1-H2 H2-H3 For the LV side also: 4. X1-X0 = X2-X0 X3-X0 5. X2-X0 = X3-X0 X1-X0 6. X3-X0 = X1-X0 X2-X0 Is there a similar pattern for Y-d, Y-Y, D-d? And how about Y-z, D-z, Z-y transformers? I've tested a YNzn5 transformer and for LV side I don't see the pattern. In this particular case I got for LV side the following (see values below): H1-H0 H2-H0 H3-H0 X0-X1 X0-X2 X0-X3 128.0 119.9 7.2 29.2 13.3 15.8 70.7 128.4 59.2 23.4 22.0 3.6 7.2 120.1 128.1 13.4 29.3 15.8 What is the relationship here for LV? For row 1 I see the relationship, for row 3 I also see but it's shifted, but for row 2 I don't see such relationship. Any suggestions, answers, someone?
while doing high voltage test on 11kv/433 distribution transformer why we only give 28 kv on hv side and 3kv on lv side for power transformers what is the value what factors it depends
Electromagnetic torque developed by the motor is compared to shaft torque. A less B same C depends on motor design D more
Explain the operation principle, advantages and disadvantages of the following converters: a) A 12 pulse converter b) A Switch-mode inverter c) A thyristor inverter
How PSV sizing being done
how to Select Lighting arrester? What r the parameters to be considered for the selection of Lighting arrester ?
Batteries. What is the difference between Lead and Nickel batteries ?
For the requirement of a furnace of temperature range up to 1200 oC using silicon carbide rods, What is the required rate of transformer needed (please do it with all details)?
Explain Circuit Breaker Trip Characteristics in detail.
How to Calculate Current Rating of SDFU (Switch Disconnector Fuse unit) for Protectionof Capacitor Bank connected to Busbar of 800Amp,in LV side of 11/0.433KV, 250KVA Transformer?
how can i use REF and diffrencial relay both in 1 CT core for transformer protection?
Can double compression glands be used with regular cables?