Where -48 volt DC use & why?????????
Answer Posted / rabi
A negative line voltage helps to reduce the corrosion from
electrochemical reactions occurring on a wet telephone line.
Also -48v DC is more stable than +48 volit, so -48 V is
preferred.
Is This Answer Correct ? | 41 Yes | 5 No |
Post New Answer View All Answers
How to confirm the Phase shifting Transformer VECTOR GROUP relation , as below ZNy11.45d10.45-ZNYy0.15d11.15
high voltage transformer input voltage,current and amps rating..distributed transformer input voltage,current and amps rating...
what is the effect of vector group while phase sequence of a generator changes,whether the vector group changes or not
What are the main advantages of generalized error co-efficients?
can anyone explain 11kV 3core cable megger,hi pot test procedure with connection details?
how will reduce the voltage. if 12volt/250ma transformer toreduce 6 volt
When semiconductor fuse does save thyristor in each cycle of conduction? Why under voltage setting keep less in SPRS and more in DC drive?
What is the difference between amorphous core transformer and CRGO core transformer?.
12.5 tons a/c is their how much kva generator can recommend to the customer.
how to electrically make connection to ferroli GN2N?
What is the settings of distance protection relay in 400 kv line
can u give me a brief idea about power line carrier communication ??
How the capacitance og capacitor volatage transformer is decided?
a 100mva,400/200v transformer has leakage impdce of 10% draws a steady state line currentof---------------
model question paper for supervisor trainee