**Introduction**

There is an easy way to calculate the apparent power S (in volt-ampere). First, you need to determine whether you have single-phase or three-phase appliances and what different types of appliances you want to connect to the generating set.

We use the following formulas:

- Single-phase:

The active power P (in watt) equals the voltage V (in volt) multiplied by the current I (in ampere) and the power factor cos φ (between 0 and 1).

P = V*I*cos φ [W]

- Three-phase:

The active power P (in watt) equals the voltage V (in volt) multiplied by the current I (in ampere), the power factor cos φ (between 0 and 1) and the square root of three (√3). *

P = √3*V_{L}*I_{L}*cos φ [W]

The apparent power S (in volt-ampere) equals the active power P (in watt) divided by cos φ.

S = P/cos φ [VA]

* This is how we find the square root of three (√3):

- When connected in star: P = 3*(V_{L}/√3)*I_{L}*cos φ = √3*VL*IL*cos φ

- When connected in delta: P = 3*VL*(IL/√3)*cos φ = √3*VL*IL*cos φ

Now that we know the formulas, we can start determining the apparent power S.**Steps to follow in order to determine the loads**

Step 1:

Make a list of all the appliances you would like to connect to the generating set. You can use the chart below.

**List of appliances**

Attention: Do not forget anything while determining the total power at home!

Appliance | Active power P [W] | HP | Ohmic – Inductive | Starting current | Emergency |
---|---|---|---|---|---|

Chopper | 2576 | 3.5 | I | ♦ | |

Lawn mower | 1472 | 2 | I | ♦ | |

Air conditioning | 1472 | 2 | I | ♦ | |

Compressor | 2208 | 3 | I | ♦ | |

Pressure washer | 2576 | 3.5 | I | ♦ | |

Pump | 2944 | 4 | I | ♦ | |

Table saw | 3680 | 5 | I | ♦ | |

Circular saw | 1500 | I | |||

Drilling machine | 600 | I | |||

Grinder | 1000 | I | |||

Hammer drill | 1200 | I | |||

Jigsaw | 600 | I | |||

Planer | 900 | I | |||

Hedge trimmer | 600 | I | |||

Angle grinder | 2000 | I | |||

Computer | 300 | I | ♦ | ||

Cooker | 1400 | O | |||

Grill | 1800 | O | |||

Toaster | 1000 | O | |||

Microwave oven | 1200 | I | |||

Mixer | 350 | I | |||

Iron | 750 | O | |||

Vacuum cleaner | 750 | I | |||

Washing machine | 1001 | 1.36 | I | ♦ | |

Tumble dryer | 2502 |