we have 3.5MVA-11/6KV transformer. how can we calculate earth fault current and NGR calculation?
If one ct is reversely connected in Y system what will effect in kwh and kvarh meter?1 316
Earth has zero potential then what would be the neutral potential ?
What is the formula for selecting the cabels according to load? How to calculate what sq.mm cabel to be used?171
How to select batteries required for ups and the inverter if we Known load? And how AH is selected of battery?145
What is the maximum and minimum rating of UPS?156
Thermal withstand capability under full short circuit conditions, in terms of number of times of occurrence of short circuit and corresponding anticipated percentage reduction in transformer life.
in my working site. momentary jerck in electrical supply ocurred frequently which cause of multiple losses in our electrical equipements. how can we protect our electrical machines and equipements in this situation.
in indoor type circuit breakers why only the corner breaker trips specially during cold season. What is the reason.
How many kw will suply from one db
Did RMU have ct and pt ?
explain all the classes with example
ratings of lightning arrester
In both 600/1000 V cable and 450/750 V cable, we can supply 415 V. However for distribution, all utilities are using only 600/100 V instead of 450/750 V. What is the reason?
The loads are connected with phase and ground then why current flow as the loads ?
what is the effect of vector group while phase sequence of a generator changes,whether the vector group changes or not
In all analog voltmeters or ammeter showing some small size symbols. as well as a star and in star 2no. digit, resister symbol,and other. what is that's meaning ?
use of choke in APFC panels
in parallel operation of power transformer why the distance between power transformer and capacitor bank feeder is necessary to know
If you have an earth with pilecap then your resistance is really low. why and how?
what's prime importance of protection in electrical system.if protection system don't work properly what can happen in electrical system?