How to calculate the NGR value for a 2.7MVA Transfomer, 11KV system where the fault current has to be limited to 50A?
1 74911. When do you use a VFD motor? 2. If the ceiling fan is on slow speed, does it consume less electricity? 3. If we want the fan to consume less electricity at low speed, what do we have to do? 4. What does “battery of 180 AMP HOUR” mean to you? 5. What does “battery of 180 AMP HOUR” mean to you? 6. If you don’t have coal, salt and copper, then how would you earth your connection temporarily at a camp site.?
Asian Power, Bhel, Focus, Focus Energy, L&T,
6 13472what a function diesel generetaor turbo charger & turbo charger is more heated explain reason ?
1799We have 2 Nos. Transformer with the capacity of 2000KVA and 1250 KVA and currently using only one 2000KVA T/R during operational hours while non- operational hous 1250 KVA T/R also used to reduce T & D losses. Similarly, 2 capacitor bank of 500KVAR and 300 KVAR also installed to balance reactive power. Now problem is around 1000 KW load PF is not maintaning 0.99 as 350 KVAR capacitor is in healty condtion. Now the PF is maintain 0.95 to 0.96.
2 6199How to calculate the electrical load for a standard telecom BTS shelter and choose the DG set capacity for the same load?
2647Post New Electrical Engineering Questions
When we use air circuit breaker, it has O/L protection ,time delay SC protection, Instataneous SC protection & ground fault protection. They all have some setting range. But what is the suitable/allowable setting for the above protection which will be safe for the equipment? For example-O/L protection setting have a range of (0.4,0.45,0.5,0.55,0.6,0.65,0.7,0.8,0.9,1.0)xIn Time delay SC protection have a range of (1.25,1.5,2,3,4,6,8,10,12)xIn Time delay setting is 0.02,0.1,0.2,0.3,0.4 Instataneous setting is fixed to 20xIn Gound fault setting is given 100A,300A,600A,900A,1200A This setting are for 2500A ACB. So what will be the basic allowable setting for the above protection? is there any formulae to calculate this<
What is the meaning of dedicated earthing?
what can be the causes of capacitor start motor having a higher current that its actual
What is the lower limit of break-down voltage of converter transformer.
Swg formulae
How to calculate the no of Ceiling fan (1200mm sweep) per unit area?
we have two motors 1250kW,6.6kV to be coupled on the same shaft ,so please provide assistance for their synchronisation.
is ac supply can store
What is the difference between circuit breaker and isolator
What are the two major types of control system?
How to megger test 11 kV cable and the acceptance IR value
What is the minimum IR value of HT/ LT cable? Pls post separetely!!!!!
I want to know how to calculate the size of electricity cable in building?
A 50Hz,4-pole,3-phase,star-connected synchronous motor has a synchronous reactance of 12ohmsper phase and negligible armature resistances.the excitation is such as to give an open-circuit voltage of 13.2kilovolt.the motor is connected to 115kilovolt, 50hertz supplying. what maximum load can be the motor torque,line current and power factor?
I use 20 nos led tube 4feet, in pathway 100mtr approximate, so what size cable i use for lighting
