Batteries used for electrical energy storage are a. Laclanche cells b. Edison cells c. Lead acid cells d.any of the above851
A circuit breaker on detecting fault will a. Open b. Close c. Open and trigger the alarm2 1793
If we have two nodes A and B and Vab is the potential difference between these nodes then which node is called reference node a.node A b.node B c. Ground node1 2796
To have variable speeds we use a. Induction motor b. Traction motor c. Shunt motor1 1760
Period of infinite continuous fourier series a. N b. N+M c.infinite1 3263
In Single Phase AC Supply,If Voltage between Phase and Neutral is 230V means what will be the Voltage between Phase and Earth?2 1793
best manufacturer for busbar for outdoor switchyard having double bus bar scheme, can any one share technical specification of busbar. 132kv voltage ?872
I just purchased a 4 position cam switch to be used to operate a 3-speed blower motor. The motor is a 10 amp motor and has 3 wires that are used to control speed. The cam switch was rated at 660V 20 amps but when I received it, I noticed that it has AC-15 operational current rating (Ie) of 4/5 amps. If I am reading the label correctly. the 4/5 amps is related to 440v/220V (Ue). Other ratings are AC-3: 5.5A, AC2: 7.5A and AC-4: 1.5A. My questions are 1) Is it safe to use this switch with the motor I have 2) what is the difference between the 20 amp Ith ratting and the Ie operational ratings?810
We are designer please help me calculate the size of 11kv cables from step up transformer to M.V panel, total load is 5 mega watt distance 900 feet (used aluminum type cables) please provided formula for calculate the cable with example.839
Please provided formula for calculate the cable size from step up transformer to M.V panel, run overhead aluminum cables, total load is 5mega watt, total length 900 feet.938
How to calculate the size of earth cable to earth the neutral of UPS ?968
how many ht 11 kv cable size for 11kv 2000 kva 11kv*433v transformer ?3 4481
why tertiary winding is used in transformer with diagram?
What is the need of generator relay panel
what is mppt (maximum power point tracking ) and how they used in solar power generation ??? what are the main components used in mppt?????
What are the basic components of the feedback control system?
dg earth connect only in the amf panel or not why
234 MVA Generator 3 phase Short circuit current Values required? Gen set Rating-234 MVA, Gen Voltage-18kv, PF;0.8, Xdv:23.5 %, Transformer Rating-18/380KV, 680MVA,Yndd1 two winding, Step up TR, ZT:35.50 %,X/R 4.33 Gen CB Position, CB open ,Disconnected open, Generator Running Voltage 18 Kv, Bi mistakes generator side earth switch Closed during that time short circuit current level in 3 Phase required, and how to test on site 234MVA Generator Short circuit current,
what is the difference between unarmoured & Flexible cable? How to identified?
what is the interrelation between voltage current torgue speed and magnetic flux in case of different types of electric motors
2. A current i=(10+10 sin t)amperes is passed through MI type ammeter. its reading will be.........
I PURCHASED A DEISEL GENARATOR SET OF AVR TYPE& RATING 125KVA BUT SOME TIMES THE OUTPUT VOLTAGE IS FLUCTUATING WHAT ARE THE PROBABLE REASONS GIVE ME
Explain about 3 phase motor fault current calculation with examples?
The magnitude of sum of two sinusoidal av voltage is equal to 230 volt.the magnitude of each individual voltage is also equal to 230 volt.what must be the phase difference between voltages?
what is the control circuit for operating the clean room air shower
What is ramp signal?
Differentiate between ideal and non ideal current sources?