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Most Sub-Stations are equipped with station batteries (DC) which is actually multiple batteries connected in series. The purpose of this battery is so that the stations basic devices can function independently of the power lines that are fed into the station. If the motor that powers a "power circuit breaker" was powered from a power line coming into the station, and that circuit breaker opened (broke the circuit), then the circuit breaker would no longer have the power to operate. Another reason for this setup has to do with electrical faults. The #1 reason sub stations have large circuit breakers is to stop faults (short circuits). When a tree knocks a power line into something that is grounded that is a fault. During a fault current on the power line rises and the voltage on that line decreases substantially. So if the voltage goes to almost zero, and a circuit breaker needs that very voltage to open so it can break a fault, you have a problem because the circuit breaker will not operate and stop the fault. (and this is the original purpose of the circuit breaker)
-Electrical Engineer
-Large Electric Utility Company
What else can I help you with?
In a power station where dc is actually converted to ac while distribution?
The generated voltage in a power station is AC voltage, not DC. So, it is never converted to AC, because it is already AC.
How do you convert a DC to AC inverter into a grid tie inverter?
A grid DC tie is where AC is converted into DC, which is then converted to AC again on the other side. If you have a DC to AC transformer setup, you'd need to add a second one going the "other" way for a full DC tie station.
Alternator generates DC or AC?
An alternator produces AC current but it is converted to DC by the rectifier inside the alternator.
How AC is converted into DC in welding machine?
rectifyer
How you convert DC TO ac?
we can convert a dc supply to an ac supply using inverters. Its a common operation which we observe in our daily lives dc can be converted to Ac using an undulator.
What is the use of a regulator?
ac supply converted with dc supply
What is the use of regulator?
ac supply converted with dc supply
Does a motor car emit ac or dc?
The engine itself emits nothing. The alternator does. The alternator emits AC, but it is converted to DC.
What is chopper amplifier?
In a chopper type amplifier the dc i/p voltage is converted into an ac voltage, amplified by an ac amplifier and then converted back into a dc voltage proportional to the original i/p signal
What is located within the system unit to converted from AC to DC?
Converter
Does a generator produce ac or DC voltage?
NO, generator always generating AC current,when commutator is used,at that time AC is converted in DC.and due to this generator is called dc generator.
Can an AC water heater be converted to operate on DC current?
An AC water heater can be converted to operate on DC current but the cost will be large. In the electrical trade anything can be done if enough money is spent to get the results that are requested.
