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Submarine power cables work on voltages of 400 kV or more, often with DC because they are linking power grids that are not synchronised.
Submarine communications cables now work with fibre-optics so the signals are modulated light-waves.
Additional Answer
Further to the original answer, another reason for using direct current for submarine cables is to eliminate capacitive currents that would flow if a.c. were used instead. The closeness of the submarine-cable's cores results in relatively-high levels of capacitance between each core and, with a.c., this would represent a capacitive load resulting in a continuous capacitive current along the cable. Such currents flow in all underground a.c. cables but, due to the length of most submarine cables, the capacitive current can be unnecessarily high.
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Does the device or cable determine the voltage on a slow cooker?
The voltage is always determined by the device. (in this case a slow cooker).However, having established what voltage to supply to the device, the cable must be suitable for the voltage used. Everything in the chain of power transmission, must be rated for the correct voltage. Cables, plugs, fuses etc.
What is thermocouple cable?
The thermocouple is an sesnsing device , when the temperature increases it increases the voltage , that voltage is used for tripping purpose
When Bangladesh first engaged with submarine cable?
Bangladesh has joined the consortium of SEA-ME-WE-4 submarine cable, which starts its commercial activities from 21st may, 2006.
What is voltage grade of cable?
Voltage Grade of cables specifies the safe voltages which the insulation of the cable can withstand.
When used on a copper-based cable a continuity tester applies a small amount of what to each conductor?
voltage
What is submarine cable buoy light and buoy?
what is submarine cable buoy light and shape & what is submarine emergency buoy light and shape
What is pilc cable?
Paper Insulated Lead Sheathed Cable. Used for medium voltage levels.
What is the function of the live cable in an electrical installation?
A "live" cable is used to supply a voltage potential to a load.
Does the device or cable determine the voltage on a slow cooker?
The voltage is always determined by the device. (in this case a slow cooker).However, having established what voltage to supply to the device, the cable must be suitable for the voltage used. Everything in the chain of power transmission, must be rated for the correct voltage. Cables, plugs, fuses etc.
What is thermocouple cable?
The thermocouple is an sesnsing device , when the temperature increases it increases the voltage , that voltage is used for tripping purpose
Give you some information about submarine cable?
Modern submarine cable is all fiber-optic. It's about a foot in diameter. In it they run just a few strands of fiber optic cable. It's packed in Vaseline--seriously, that's what they use. Then it's wrapped in plastic, metal and fiberglass jackets for protection.In the cable are inline amplifiers that boost the signal.Now, in the OLD days before submarine cable went digital, each wire pair in a submarine cable carried 16 channels of communication, as opposed to 12 channels on a terrestrial link. They did it that way because submarine cable is so expensive.
Will voltage drop over cable distance?
If the voltage is supplying any current through the cable, i.e. if there is any 'load' at the end, then the voltage will drop through the cable.
When Bangladesh first engaged with submarine cable?
Bangladesh has joined the consortium of SEA-ME-WE-4 submarine cable, which starts its commercial activities from 21st may, 2006.
What is a cable ship?
A cable ship is a vessel fitted for laying and repairing submarine cables.
What effect does it have on the voltage drop in an electrical cable if the resistance of the cable is decreased?
It will decrease the voltage drop.
What is size of power cable of 1137 kva generator?
It depends totally on the voltage used.
Why 220v in the Phil and 110v to the other country?
i think the answer is more on economical reasons ( 220v in the phil ).. since Voltage is inversely proportional to current..the higher the voltage, the lower the current..the lower the current, the smaller the electrical cable to use. In short, if we used 220v, electrical cable to be used is much smaller compared to the cable used in 110v..Smaller cable means less price than of the much larger cable.. :))
