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 3266What is Surge Capacitor? Why it is require in Generator Circuit Breaker,inspite of surge arrester?
2634in 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.
1775which one is more costly:single phase induction motor or 3 phase induction motor??give proper reasons..
1 2932Due to ferranti effect which power increases at the receiving end?active power or reactive power?
5 7467i 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 7558Why 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 7475hi, 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.
2325Post New Electrical Engineering Questions
I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?
what are the applications of TIG welding
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?
Starting current of a 10 HP induction Motor is ______ time’s full load current.
What is the function of interposing current transformer?
What is MSL designation of a motor and same may be provided in details.
Why AC & DC capacitor are use in UPS ??????????????????
Is RTCC panel needs any control supply.
how indusrial diesel generator work
we are going to install a solar PV site and how can we calculate PV Solar Panel Efficiency, can anybody tell me complete method for its calculation.
If I bring a basic electric meter from the States and hook it up in Costa Rica in a development that has only one transformer for the 50 homes, will it still be accurate regarding the usage of kilowatt hours?
UG cable sizes were specified in sqmm. But practically its not coming to mesure. What's the reason for that? And how they specify the size of the cable?
Disadventage of cable-gland earthing if any ?
Explain RLC circuit?
what is the isolation transformer. what is the isolator?
