# On an electrical three phase contactor what is A1?

A1 is a termination point on a contactor it is an alseriery going to another point.

# What is the symbol for three phase power?

It is like the letter O with a / through it. This is the symbol ร. With a number (1) 1ร for single phase and with a number (3) 3ร for three phase.
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# Why do you use three phase power?

For any given load, a three-phase system uses less volume of copper than a single-phase system and, so, is more economical. If you mean "Why are there two different power sy (MORE)

# Does an unbalanced load on a split phase electrical power service affect the power measurement?

I assume you are referring to (in the US) standard 120V/240V single-phase service?   The answer is that unbalanced power (more current on one of the hot wires than the othe (MORE)

# How do you wire three phase power that has no neutral to get 120V?

  Answer     You need a three phase step down transformer to give you, your 110vac to 240vac.
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# How can you convert household AC electrical power from single phase to three phase?

For low-power appliances you can buy an electronic power  inverter which produces 3-phase outputs from a 1-phase (single  phase) service.    Such inverters are not ch (MORE)
In Science

# What is the difference between single phase and three phase power?

Single phase has two line voltage wires, separate from each  other; three phase power has three line voltage wires, actually  saving more energy and thus money.  +++   (MORE)

# Why use a three-phase AC power system?

3-phase is used for high power loads and also for transmitting  power over distance. This is done for efficiency and/or to use less  wire for the required performance.   (MORE)

# Can use a three phase power to run a single phase equipment?

Yes, of course. A single-phase load is connected between any two lines of a three-phase, three-wire, system, or between any two lines or between any one line and the neutral (MORE)

# What is the main advantages of chosing single phase electric power systems over three phase system?

Your question should really be the other way around, because three-phase systems have a major advantage over single-phase systems because, for a given load, they use around 25 (MORE)