Why -48V dc power supply using in telecom field?
Answers were Sorted based on User's Feedback
Answer / r. d.
- 48 VDC is used in telecom to prevent corrosion or
electrolysis. If you use +48VDC there are free electrons
raging to go somewhere, as each electron is lost, you lose
what is part of a molecule of copper, thus the copper
corrodes away, lines corrode away until they break! -48VDC
wants electrons so it attracts molecule = no loss of copper
or corrosion/electrolysis.
Is This Answer Correct ? | 36 Yes | 3 No |
Basically for any electronic device it needs a DC supply as
a source power the different components inside it.
everybody knew that the telephone in our houe will not
contain any supply line (speaking about basic model) other
than the one that comes from the exchange. but how is the
Electronic board inside the telephone is working?
this line carries a DC voltage of 48V (42V to $8V approx).
this voltage supplies power to the components inside the
telephone as well as carries the voice signals from
exchange to our phone and vice versa.
Is This Answer Correct ? | 16 Yes | 9 No |
Equipments which is used in telecom field Designed
for -48volts
Is This Answer Correct ? | 12 Yes | 11 No |
Answer / ratikanta mekap
because all of the electronics equipments used in telecom
field(bts,tx-rx rack,mux etc)are working in dc supply,so
that this is happen.
Is This Answer Correct ? | 5 Yes | 13 No |
Answer / u.chandarasekar
Why Because Earthing contrctor Earn money so that
Is This Answer Correct ? | 7 Yes | 16 No |
whis is the formula of converting KW into HP ?
how to calculate the size of the cable for a particular rating 3phase induction motor?
1 Answers Godrej, Megatron Solutions,
why to use 50hz only in tansmisson and as well as in distribution why not60hz?
How do we calculate the maximum amount of current in a 300 SQ.MM cable ?
what should be the value of helathy insulation b/w two cores of LT cable.
Why current leads the voltage in case of capacitor load? Why voltage leads the current in case of inductive load? Why both are with in phase in case of restive load?
how to calculate IR value of 33KV cable ??
How do you select a cable size(Cu & Al) for a particular load?
what is advantage of using star to delta in place of dol starter
Why does curving the pole faces in a dc machine contributes to a smoother dc output voltage from it?
Type of motor stater detail and working detail
what is current check gurd relay?