Westerbeke BCD 4.4KW Manual del operador descargar pdf (Pagina 64)

GENERAL INFORMATION AND CARE

THE

GENERATOR

Use

Electric Motors

The

power required to start

electric motor

considerably more than

required to keep it running after it

started. Some motors require much more current to start than others. Split-phase

(AC)

motors require

more current to start, under similar circumstances, than other types. They are commonly

used

on easy-start-

ing loads, such

washing machines, or where loads are applied after the motor

started, such

small

power tools. Because they require S to 7 times

much current to start

run,

their

use

should

avoided,

whenever possible, if the electric motor

to be driven by a

small

generator. Capacitor and repulsion-induc-

tion motors require from 2 to 4 times

much current to start

run.

The current required to start any

motor varies with the load connected to

it.

electric motor connected to

air compressor, for example,

will

require more current than a motor to which no load

connected.

general, the current required to start

11S-Voit

motors connected to medium starting loads will

ap-

proximately

follows:

MOTOR

AMPS

FOR

AMPS

FOR

SIZE

RUNNING

STARTING

(HP)

(Amperes)

1/6

3.2 6.4 to 22.4*

1/4

4.6

9.2

to 32.2*

1/3

S.2

10.4

to 72.8*

1/2

7.2

14.4

29.2

3/4

10.2

20.4

40.8

26 toS2

* Note that

the above table the maximum "Amps for Starting"

more for some small motors

than for larger

ones.

The reason for this

that the hardest starting types (split-phase)

are

not

made

larger

sizes.

Because the heavy surge of current needed for starting motors

required for only

instant, the generator

will not

be damaged if it can bring the motor up to speed

a few seconds. If difficulty

experienced

start-

ing motors, turn off

all

other electrical loads

and,

if possible, reduce the load on the electric motor.

Required Operating Speed

Although individual units may vary slightly, the normal voltage and frequency of typicaJ60-(SO-)Hertz engine-

driven generators described

this manual are shown on the chart on the next page.

Run

the generator at first with

load applied, then at half the generator's capacity, and finally loaded to its

full capacity as indicated

the generator's data plate.

See

the rpm/Hertz/frequency chart on the next page.

Westerbeke Generators

1 2 ... 59 60 61 62 63 64 65 66 67 68 69 ... 93 94

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Westerbeke BCD 4.4KW Manual del operador Pagina 64

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