Winco WC6000HE User Manual download pdf (Page 5)

1204-00 60706-221

STARTING ELECTRIC MOTORS

Electric motors require much more current (amps) to

start them than to run them. Some motors, par-

ticularly low cost split-phase motors, are very hard

to start and require 5 to 7 times as much current

to start them as to run them. Capacitor motors are

easier to start and usually require 2 to 4 times as

much current to start them as to run them. Repul-

sion Induction motors are the easiest to start and

require 1 1/2 to 2 1/2 times as much to start them as

to run them.

Most fractional horsepower motors take about the

same amount of current to run them whether they

are Repulsion Induction (RI), Capacitor (Cap), or

Split-Phase (SP) type. The chart below shows the

approximate current required to start and run various

types and sizes of 120 volt 60 cycle electric motors

under average load conditions.

HP AMPS

RUNNING

STARTING AMPS

SP CAP RI

1/6 3.2 16 to 22 6 to 13 5 to 8

1/4 4.5 22 to 32 9 to 18 7 to 12

1/3 5.2 26 to 35 10 to 21 8 to 17

1/2 7.2 not made 14 to 29 11 to 18

1 13.0 not made 26 to 52 20 to 33

The ﬁ gures given above are an average load such

as a blower or fan. If the electric motor is connected

to a hard starting load such as an air compressor, it

will require more starting current. If it is connected

to a light load, or no load such as a power saw, it will

require less starting current. The exact requirement

will also vary with the brand or design of the motor.

Self-exiting generators respond to severe overload-

ing differently than utility power. When overloaded,

the engine is not able to supply enough power to

bring the electric motor up to operating speed. The

generator responds with high initial starting current,

but the engine speed drops sharply. The overload

may stall the engine. If allowed to operate at very

low speeds, the electric motor starting winding will

burn out in a short time. The generator winding

might also be damaged.

CAUTION: EQUIPMENT DAMAGE

RUNNING THE GENERATOR SET UNDER

THESE CONDITIONS MAY RESULT IN DAMAGING

THE GENERATOR STATOR AS WELL AS THE MO-

TOR WINDING.

The heavy surge of current required for starting

motors is required for only an instant. The genera-

tor will not be damaged if it can bring the motor up

to speed in a few seconds of time. If difﬁ culty is

experienced in starting motors, turn all other electri-

cal loads off and if possible reduce the load on the

electric motor.

PREPARING THE UNIT

UNPACKING

CAUTION: EQUIPMENT DAMAGE

THIS UNIT HAS BEEN SHIPPED WITHOUT OIL.

Failure to maintain the engine oil at the proper level

will result in serious engine damage.

When you unpack your new engine-generator set be

sure to remove all the information sheets and manu-

als from the carton.

1. This generator-set was in good order when

shipped. Inspect the generator-set promptly after

receiving it. If any damage is noted, notify the trans-

portation company immediately; request proper pro-

cedures for ﬁ ling a “concealed damage” claim. Title

to the equipment and responsibility for ﬁ ling a claim

rests with you when a generator-set is sent F.O.B.

shipping point. Only you can legally ﬁ le a claim.

2. Before proceeding with the preparations of your

new generator-set for operation, take a couple of

minutes to insure the unit you have received is the

correct model and review the speciﬁ cation pages in

this manual to insure that this unit meets your job

requirements.

UNIT PREPARATION

Before your generator-set was shipped from our

factory it was fully checked for performance. The

generator was load tested to its full capacity, and the

voltage and frequency were carefully checked and

adjusted.

LUBRICATION

Before starting the engine, ﬁ ll the crankcase to the

proper level with a good quality oil. The recom-

mended grade of oil and quantity of oil required is

listed in the engine operator’s manual. The neces-

sity of using the correct oil, and keeping the crank-

case full cannot be overemphasized. Engine failures

resulting from inadequate or improper lubricant are

considered abuse and not covered by the the gen-

erator or engine manufacturer’s warranty.

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Winco WC6000HE User Manual Page 5

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