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 3663What is Surge Capacitor? Why it is require in Generator Circuit Breaker,inspite of surge arrester?
2858in 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.
2029which one is more costly:single phase induction motor or 3 phase induction motor??give proper reasons..
1 3222Due to ferranti effect which power increases at the receiving end?active power or reactive power?
5 8455i 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 8329Why 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 7922hi, 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.
2522Post New Electrical Engineering Questions
We have two APFC panels in same station. I need how to connect CT in two APFC panels.can we take one CT in series connection or two separate CTs.
Difference between earthing & grounding.?
What is turn ratio of a transformer?
what are the steps involved in generator load test?
how you will decide the distance between the power transformer and its fencing
a starter used for squirrel cage induction motor?
im working in one private compeny in gujarat. i was complet diploma electric in 2010 from gujarat technical board. now i want electric supervisor licence in gujarat but i dont't know when i apply? plz give me address of the licence dippartment office in gujarat. gandhinagar
How much minimum insulation required between 11kv/3.3kv transformer windings?
How it can worked plc based electrical system And which type of software using.
whether starting current is limited to rated current of motor through soft starting or it exceeds the rated current?
circuit diagram of trip circuit supervision relay
While HT line put on to activate ACB in low tention panel VCB tripping instantly.why it happens
On what basis the the size of Lightning arrester for buildings are selected ?
what's the exact magnitude of current, flows through Neutral?
what the function breaker failure scheme, how is it operated
