What is the differance between negative dc voltage and
positive dc voltage because some circuit uses -24,-5,-12,-
15,volt dc supply
Answer Posted / alok gangwar
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 ? | 32 Yes | 7 No |
Post New Answer View All Answers
Control cables in S's will carry 1000v which is AC R DC? Pls answer meĀ
what is the difference between general inverter and solor inverter clerly explain plz
how to calculate the power factor when instantaneous voltage and current has harmonics in it ?
what is auto re-closer?
Sir, I have applied for the of Assistant.engineer of NPDCL. please send me all AP TRANSCO AND JENCO solved papers of previous exams . I requested send me the papers to my id as soon as possible (rajanikanth_peddi@yahoo.co.in) (This is very urgent) Thank You,
What is the meaning of HT Trivector Meter ?
Is vtg is controlled by the resistor? if else how much?
Where voltage are high and current to be interrupted is low the breaker preferred is:
what do you mean by class PS CT and what are technical details needed for calculating it?
What does ampere turns shows?
What is meaning of out of phase (making & breaking) capacity And how to calculate
We have given to 3phase supply to ups system & how can coming netural
how we sesign the transformer give some specifion regarding design of transformers
What are :- AC Distribution Board (Single & Double Front) DC Distribution Boards Distribution Board LT Breaker Panel.
I would like to know that the fault curretn at base load and at 10% generation will be same? Fault level of BUS remain same with different generation?