There are many different brands and styles of kilowatt meters that are on the market for sale. What kind one would use depends on what it is being used for. The least expensive and most basic kilowatt meters are intended for use in the home to read how much energy, in kilowatts, an item like a lamp, for example, is using. Since billing units of electricity are measured in kilowatts they can be very useful in a homeowner's efforts to be energy efficient. These can be set to read how much the appliance is using at the moment or over an extended period of time. These types of meters can be handy if a person is interested in how much electricity is being used by one appliance compared to another that they might want to replace with to conserve energy. These can range anywhere from $10 to
$65.
There are also professional kilowatt meters that are used by electricians to measure how much electrical current is running through a power line or circuit in a house or building. These come in single, double and three phase designs. Some even go up to five phases, but the more common are the one, two and three phase. These kilowatt meters can cost anywhere from $200 to $3,000, depending on the features and display screen it has.
The more expensive of these ones come with LCD screens and multiple phases. This means that a person could insert multiple currents into the meter at once and get a reading of all of them combined, or separately. For example, the ones that one can see on the outside of most of the houses and buildings in America are single phase, because they are only measuring the amount of kilowatts that are going into the house or building and nothing else.
Most of the professional kilowatt meters also have automatic detection of the direction of the flow of load current, so a person could tell which way the electric current is running through the wire. Some of the more expensive ones can be hooked up to control switchboards and can monitor and control the input and output of kilowatts into a home or building. These devices are competent tools for saving money on the electric bill and recording energy consumption of a house or even a general area. They are an absolute necessity for all professional electricians.
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