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while buying 30 kva on line ups for 1 phase ouput, we ave to calculate the number of batteries for 2 hours back up? how to calculate the ah rating and number of batteries
1 4103What is Surge Capacitor? Why it is require in Generator Circuit Breaker,inspite of surge arrester?
3183in our all power plant have connected in grid and grid voltage and plant voltage is same, but as per as electrical concept the power will transmit from high potential to low potential but here altough same,then how power transmit from power plant to grid.
2386which one is more costly:single phase induction motor or 3 phase induction motor??give proper reasons..
1 3660Due to ferranti effect which power increases at the receiving end?active power or reactive power?
5 9560i have dry type transformers can you help me that how many tests i can do to know the performence of transformer and also please tell me about the BDV test and Insulation resistance test in oil cooled transformers
4 9319Why 3 over-current and 1 earth fault relay is used on primary side of transformer? Why 2 over-current and 1 earth fault relay in used on secondary side of transformer?
1 8801hi, i have 3x200KVA and 2 x 80KVA UPS with battery bank of 150AH 68Nos. and 100AH 204Nos., i need to install AC either ductable or PAC type, so can you help me to calculate heat load and capacity of the AC to install.
2789Post New Electrical Engineering Questions
what is vtg limit of earth and neutral at transformer side?
how to calculate the mesh earth network resistance in such substation, is there any recommended resistance values with references , thanks!
what will happen if i connect 12 volt battery with 24 volt battery charger.
What is a advantage of Self Reset Lockout ? On Fault breaker get trip & fault no longer exist then self reset lockout how inform us?
what is the difference between transformer,converter and transducer
How do we calculate over and under frequency tolerance from generator data?
1.main parts of generator? what is used A-check,B-check,C- check? 2.what is FM200 system in data centers? 3.difference between pac,ahu?
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
what is meant by re-rolling motor? how it differs from standard motor?
I want to calculate how much capacitor we connect to maintain the unity power factor? Is there any formula? Pls give me the answer
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how technical is calculated in 11kv line and lt line
at what base you will tell the direction of rotation of dc motors and generators?
why electronic instruments is more favorable than electrical?
What are the disadvantages of thermal power plant?
