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because the termination and relays in side the telecoms penal needs for DC supply to continues the protection equipment and relay and purpose of telecoms
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∙ 12y ago
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∙ 11y agoCause the baterys for
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Full form of DC power supply?
DC Power is Direct Current Power Supply.
Which way does DC power flow?
When you connect a load (motor, light bulb, etc.) in series with a power supply, current will flow, whether AC or DC depends on the power supply you are using.
Can you connect a 24v dc motor to household current?
You need a DC power supply in order to connect a 24v DC motor to household power.
What is the purpose of dc power?
theperpose of a power supply is to step up or step down an ac voltage to a desired dc value
If 1.8 amps ac is being drawn from a 24 volt DC power supply what would the current draw be in DC amps?
A 24 volt DC power supply provides DC amps, not AC amps. You cannot draw 1.8 amps AC from a DC power supply, without some kind of inverter stage.That is the answer to the specific wording of the question. Now the answer to the question I think was originally intended...If 1.8 amps AC is being supplied to a 24 volt DC power supply, what would the current supplied by the power supply be?Power is volts times amps, so power supplied to the power supply is 120 VAC (assumed) times 1.8 amps, or 216 watts. If the power supply is 100% efficient, then the power input equals the power output, so use the some equation to take 216 watts and divide by 24 volts, and you get 9 amps.Keep in mind, this is ideal state, assuming 100% efficiency, and no real power supply will be that.
How do you wire -48v dc power and ground to earth?
always think of any supply system so : RED = MOST POSITIVE BLACK = MOST NEGATIVE in a telecom system the -48V supply is refferenced to ground and earth, so the supply wire is NEGATIVE, this means a DC supply most positive signal the RED wire, go to EARTH = ZERO, the BLACK wire is the MOST negative, so in this case it is -48V
How do you get -48v DC?
In a 48V DC system you ground the positive to 0V so the live wire will be -48V.
Can you convert ATX power supply to run off DC input 24v 48v or 120v?
Like to run on a DC powered machine? Probably the easiest and safest way would be to buy a standard power inverter.
What are the applications of variable DC power supply?
variable dc supply are used to get desired amount of dc supply
Full form of DC power supply?
DC Power is Direct Current Power Supply.
Is the metro rail train using ac or dc power supply?
dc power supply
What is the value of ripple in the ideal dc power supply?
In an ideal DC power supply, there is no ripple.
What the conclusion that can take in multiple dc power supply?
conclusion of dc power supply 9V
What is the main function of auxiliary transforme in a substation?
auxiliary transformer is used to supply low voltage for AC power system inside substation such as lighting ,air conditioners and other AC supply system and DC power system such as protection relays, batteries, SCADA & telecom system and other DC supply system
How you convert a power supply into 12v DC?
DC 12V power supply can convert 110/220V AC power source to 12V DC.
Why you use dc supply in generator protection panel?
The DC supply may supply power to trip breakers, or to power the protective relays.
Why telephone lines operating voltage at -48V DC in India?
To protect the euipement from Lightning/ Thundering: All telecom electronics works on "-" Vdc supply, because thundering clouds close to ground always charge with "-" polarity. Clouds with this charge always needs "+" to discharge this charge. so to avoide this discharging (which leads to damage the all eauipements) all quipement is supplied with the -Vdc supply.
