ELECTRICAL

ELECTRIC MOTOR LOADS

It is characteristic of common electric motors in normal operation to draw up to six times their running current while start- ing. This table may be used to estimate the watts required to start “Code G” electric motors; however, if an electric motor fails to start or reach running speed, turn off the appliance or tool immediately to avoid equipment damage. Always check the requirements of the tool or appliance being used compared to the rated output of the generator.

Motor Size (H.P.)

Running Watts

Watts Required to Start Motor

 

 

 

 

 

Repulsion Induction

Capacitor

 

Split Phase

 

 

 

 

 

 

 

 

 

1/8

  275

  600

  850

 

1200

 

 

 

 

 

 

1/6

  275

  600

  850

 

2050

 

 

 

 

 

 

1/4

  400

  850

1050

 

2400

1/3

  450

  975

1350

 

2700

 

 

 

 

 

 

1/2

  600

1300

1800

 

3600

 

 

 

 

 

 

3/4

  850

1900

2600

 

1

1100

2500

3300

 

 

 

 

 

 

 

CAUTION:

Operating voltage and frequency requirement of all electronic equipment should be checked prior to plugging them into this generator. Damage may result if the equipment is not designed to operate within a +/- 10% voltage variation, and +/- 3 hz frequency variation from the generator name plate ratings. To avoid damage, always have an additional load plugged into the generator if solid state equipment (such as a television set) is used. A power line conditioner is recommended for some solid state applications.

GENERATOR CAPACITY

Make sure the generator can supply enough continuous (run- ning) and surge (starting) watts for the items you will power at the same time. Follow these simple steps.

1. Select the items you will power at the same time.

2. Total the continuous (running) watts of these items. This is the amount of power the generator must produce to keep the items running. See the wattage reference chart at right.

3. Estimate how many surge (starting) watts you will need. Surge wattage is the short burst of power needed to start electric motor-driven tools or appliances such as a circular saw or refrigerator. Because not all motors start at the same time, total surge watts can be estimated by adding only the item(s) with the highest additional surge watts to the total rated watts from step 2.

Example:

 

 

 

 

 

 

Tool or Appliance

 

Continuous

 

Surge

 

 

 

(Running) Watts

(Starting) Watts

 

 

 

 

 

 

 

 

 

Refrigerator

 

700

 

1350

 

 

 

 

 

 

 

 

Portable Fan

 

40

 

120

 

 

 

 

 

 

 

 

Laptop

 

250

 

250

 

 

 

 

 

 

 

 

46 in. Flat Panel

 

190

 

190

 

Television

 

 

 

 

 

 

 

 

 

 

 

 

 

Light (75 Watts)

 

75

 

75

 

 

 

 

 

 

 

 

 

1255 Total

1350 Highest

 

 

Running Watts

Surge Watts

Total Continuous (Running) Watts

1255

 

Plus Highest Additional Surge Watts

+ 1350

 

 

 

 

 

Equals Total Generator Output Required

2605

 

8 — English

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Ryobi RYI2000T manuel dutilisation Electric Motor Loads, Generator Capacity, Example