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3 Phase Power Grain Dryer
3 phase power is used today for many applications ranging from the above grain dryer to saw mills, conveyer belt systems, refrigeration and air conditioning, etc.

3 Phase Contents
- 3 Phase Power Home
- 3 Phase Wiring
- 3 Phase Power Calculation
- 3 Phase Power Converter
- 3 Phase Converters
  * Rotary Phase Converters
  * Static Phase Converters
- 3 Phase Generators
- 3 Phase Transformers
  * 3 Phase Isolation Transformers
- 3 Phase Motors
- 3 Phase Electricity
- 3 Phase Power Loads
- 3 Phase Frequency
  * Frequency Converters
- 3 Phase Distribution
- 2 Phase Systems
- 1 Phase Loads on 3 Phase Power
- 3 Phase Loads on 1 Phase Power


3 phase power three phase power three phase electricity three phase generator 3 phase converter, rotary three phase

 

3 Phase Wiring

To Buy Phase Converters
We Recommend ACE Brand.
Call 1-800-967-7217
Web Link:  Phase Converters

3 Phase Electrical Circuit Wiring and Color Codes
The 3 phases are typically indicated visually in electrical diagrams by colors.  The standards for these colors vary by country. See the 3 phase wiring color code table for details.

Conductors of a 3 phase system are usually marked by color code, to allow for balanced loading and to assure the correct phase rotation for 3 phase induction motors. Colors used vary widely and may adhere to old standards or to no standard at all, and sometimes vary even within an installation. However, the current National Electrical Code (2005) does not require color identification of conductors other than that of the neutral (white or white with a color stripe), the ground (green or green with a yellow stripe), or in the case of a High Leg Delta system, the High Leg must be identified with orange.  See the chart below for color coding by country.

3 Phase Power Wave Form
One voltage cycle of a three-phase system, labeled 0 to 360 ( 2 π radians) along the time axis. The plotted line represents the variation of instantaneous voltage (or current) with respect to time. This cycle will repeat 50 or 60 times per second, depending on the power system frequency. The colors of the lines represent the American color code for three-phase. That is black=VL1 red=VL2 blue=VL3
3 Phase Power Wave

Three phase systems may or may not have a neutral wire. A neutral wire allows the three phase system to use a higher voltage while still supporting lower voltage single phase appliances. In high voltage distribution situations it is common not to have a neutral wire as the loads can simply be connected between phases (phase-phase connection).

 
 

L1

L2

L3

Neutral

Earth

North America

Black

Red

Blue

White

Green

North America (newer 277/480 installations)

Brown

Orange

Yellow

White

Green

UK until April 2006

Red

Yellow

Blue

Black

green/yellow striped (green on very old installations)

Europe (including UK) from April 2004

Brown

Black

Grey

Blue

green/yellow striped

Previous European (varies by country)

Brown or black

Black or brown

Black or brown

Blue

green/yellow striped

Europe, for busbars yellow green purple

* In the U.S. a green/yellow striped wire usually indicates an isolated ground.

3 Phase Circuit Numbering
In the U.S., the circuit numbers of a three phase system are identified as follows. The following chart is true for 3 phase power (Black, Red, Blue) and 277/480 (Brown, Orange, Yellow) installations. The purpose of the standardized circuit number to wire color is for future troubleshooting. For example, if an electrician knows that the electrical wire running to a nonworking plug is blue, the electrician can instantly eliminate 2/3 of the remaining circuits.

Black/Brown Red/Orange Blue/Yellow

1/2
7/8
13/14
19/20
25/26
31/32
37/38

3/4
9/10
15/16
21/22
27/28
33/34
39/40

5/6
11/12
17/18
23/24
29/30
35/36
41/42

3 Phase Power Calculation
There are several mathematical 3 phase power calculations that you can use to calculate your 3 phase power distribution to make sure that your wiring distributes your load evenly maintaining a balanced system.  These calculations are useful for many purposes including when you have single phase equipment and 3 phase equipment running on the same power lines.  Read more about 3 phase power calculation here.

Continue And Read About Additional 3 Phase Power Details:

- 3 Phase Power Home
- 3 Phase Wiring
- 3 Phase Power Calculation
- 3 Phase Electricity
- 3 Phase Power Loads
- 3 Phase Power Converter
- 3 Phase Converters
  * Rotary Phase Converters
  * Static Phase Converters
- 3 Phase Generators
- 3 Phase Transformers
  * 3 Phase Isolation Transformers
- 3 Phase Motors
- 3 Phase Frequency
  * Frequency Converters
- 3 Phase Distribution
- 2 Phase Systems
- 1 Phase Loads on 3 Phase Power
- 3 Phase Loads on 1 Phase Power

Contribute 3 Phase Power Articles to The 3 Phase Power Resource Site:
If you would like to contribute additional 3 phase info to our 3 phase power resource site please feel free to email your 3 phase power article to us at info@3phasepower.org.  By doing so you are giving us full rights to edit and distribute the info freely worldwide in perpetuity in any way we see fit.  Note that The 3 Phase Power Resource Site is run by all volunteers and thus we do not have the ability to respond to all emails.  Also not all info submitted will be added to the site.  It is at the sole discretion of our electrical editors.  Thank you for contributing! 

 

Smooth 3 Phase Power Wave Form (center)
Because of its smooth wave length properties, 3 phase electrical power is used across the U.S. and throughout the world.



3 Phase Transformer

3 Phase Substation Transformer
(above)
There are a variety of 3 phase transformer types and voltages, depending on your power needs.


3 Phase Power Saw

3 Phase Power Saw (above)
There are a whole variety of power equipment and power tools which require 3 phase power to run.


TEMCo 3 Phase Converter

3 Phase Converter
(above)
Some Types of Rotary Phase Converters will run on 1 phase power and generate 3 phase power to run other 3 phase equipment.


 
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