Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / komyozaw
Back up protection for power system.
Because when the main supply is failure and recover.
We do not know the recover voltage is Higher or lower than normal .So we should check and protect with protection relays.
this protection relays is power by battery charger.
Also all the system is shut down , the battery backup protection is remain.
| Is This Answer Correct ? | 22 Yes | 12 No |
Post New Answer View All Answers
In siemens S7-300 PLC, what is function and function block ? What is the difference between them ? When to use function and when to use function block ?
How is the percentage impedence of a transformer fixed at design stage???
what is smart grid? why we use it? explain in detals bcoz i want give presentatin from it....
plz send me Bhel, Mahagenco, sbi previous exam paper for electrical engineer on my email-id kambali_smita@yahoo.co.in
What do you mean by the zone of protection?
sir please send me iocl written test paper in my e-mail account. i'll be obliged to you........ thank u roshan
Is it good to short Neutral and Ground in the PLC or DCS main Power supply. Pls give YES or NO with reasons...? Simarpreet
Do you know what is dry-out test in x'mer
Give some differences between open loop and closed loop control systems.
Could you measure voltage in series?
700KW 6.6KV slip ring induction motor to use VFD to control the speed
Whats the difference btwn a latch, port,data bus buffer? Do they all not hold data in d flip flops??
what is the function and use of cable differential protection relay?
how does a liquid starter reduce the starting currents?
When we giving the 3 phase supply to ups system how to coming netural?
