What difference between a kilovoltampere and kilovolt?

Answer 1

Kilo simply means 1000. Volt-ampere (VA) is a measure of power, similar to the watt. Volt is a measure of voltage, or electrical pressure. Voltage means electricity is available, but unless it is actually used, no current (amperes) flows, and no work (power) is done. Suppose you have a motor that needs 1000 volts to run, and when it is on it draws one ampere (amp) of current. We would say the motor supply voltage is one kilovolt. When the motor is running, we would say it uses one kilovolt-ampere (1KVA) of power (1 ampere * 1000 volts = 1000 VA or 1 KVA).

Answer 2

There are as many volts in a kilovolt-ampere as the amperes require!
A kilovolt-ampere is a unit of electrical energy "supplied or consumed at a certain rate" and is equivalent to 1000 watts.
To get watts you have to know both the voltage (volts) and the current (amps) used by a particular appliance or piece of electrical equipment.
Then, using the Power Law, you can calculate watts = volts * amps.
So, for example, an appliance that uses 4 amps at 240 volts will consume electricity at a rate of 960 watts and another appliance that uses 8 amps at 120 volts will also use 960 watts.