General Electric GE Bulletin No. 4933 : Small Polyphase Motors, Riveted-Frame Const. Motors

General

Electric

Company

March,

The
system
has

ledtoa

igic

SMALL

extension
for

the

distributionoflight

general

Schenectady,N.

POWER

POLYPHASE

of

the

alternating

recognitionofthe

AND

MINING

Copyright,

by

General

Electric

MOTORS,

CONSTRUCTION

current

and

power

many

Y.

DEPARTMENT

1912

Company

RIVETED-FRAME

invariably
driven
tage,
independent
stopped
equipment.
space,
their
ventilation,
tion

with

to

the

most

permits

machinestothe

as

each

without

The

eliminationofshafting

attendant

and

power

output,

careful

consideration.

(L%&^

Bulletin

the

arrangement

best

possible

machine

unit

and

regard

resultant

losses,

possibilityofovertime

charges

are

then

can

be

to

the

economyinfloor

better

directly

all

features

and

No.

4Q33

of

the

advan

becomes

started

an

or

remaining

belts

with

lighting

and

opera

proportionate

worthy

of

A\

TOTALLY

advantageous
for

driving
constant
The

General

built

induction

J4

h.p.to(5,000

units

of

This

publication,

ENCLOSED

INDUCTION

featuresofthe

small

speed

service

Electric

motors

h.p.

even

larger

machinery,

however,
whatisknownasthe
tion

adopted

1.")

h.p.atISO!)

As

regards
equaled;so
usersofelectric
ments

Company
Subjecttochange

are

Note.—The

does

for

sizes

r.p.m.

flexibility,

clearlyisthis

power

necessary

datainthis

not

guarantee

without

notice.

RIVETED
MOTOR

and

Company

ranging

FRAME

induction

particularly

individual

has

in

size

motor

for

drive.

already

from

andispreparedtofurnish

capacity

riveted

up

motor

if

deals

frame

to

and

driveisun-

required.

only

with
construc
including

appreciatedbyall

thatnoextended

here.

publication
their

Individual

are

correctness,

for

argu

drive

the

convenienceofcustomers,

nor

doesithold

STANDARD

The

OPEN
MOTOR

riveted
construction
power,

has

its

increasedbythe

itself

responsible

and

for

TYPE

RIVETED

WITH

SLIDING

frame

motor,

and

small

weight

fieldofusefulness

fact

thatinmany

every

effortismadetoavoid

any

errorsoromissionsinthis

FRAME

BASE

with

INDUCTION

its

compact

per

still

further

instances

error,

but

publication.

horse

this

GENERAL

ELECTRIC

COMPANY

4933-2

it
nent

Small

canbereadily

partofthe

lineofmotors

for

high

efficiency,

VARIABLE

These
diameter,
circuits.mIt
tained

motors

and

desired.50per

with

proportionate

are

Polyphase

Motors

designedtoformacompo

machineitistodrive.

has

wonanenviable

low

operating

SPEED

FAN

drive

fans

ranging

wound

for

cent,

decreaseinwattage

MOTOR

two-orthree-phase,60cycle

600

fromISto42inches

speed

reduction

reputation

tempera-

300

R.P.M.

canbeob

input.

This

appreciably
sacrificing
been
laminations
end

plates,

The

punchings
absolute
same
the

heat
from
with

The
cireuited
cage
external
and

substantial.

of

the

mechanical

accomplished

between
while

rigidity in

time,

owing

is

the

core

the

old

Rotorofthe

windingofthe

type

which,

connections,

sparking
contactsinother
K

is

especially

powder

operationisabsolutely

in

starting

For

mills,

service

under

decreased

without

strength.

by

securely

two

under

areofsufficient

the

to

their

much

and

more

windings

construction.

FormKmotor

owing

is

As

thereisno

often

typesofmotors,

suitable

gas

plants,

essential.

requiring

load,

the

in

any

This

clamping

cast

iron

flanges

hydraulic

pressure.

depthtoinsure

stator

exposed

rapidly

than

and

surface,

dissipated

was

possible

hasashort

well

to

known

the

squirrel

absence

particularly

possibility

caused

by moving

the

for

operation

etc.

where

relatively

sparkles?

frequent

FormMmotor

way

has

the

at

the

simple

Form

with

or

of

in

turcs,

rugged

ity,

features

through

a
theoretical
involved,

of

high

and

grade

portions.

Two-Phase

superior

distributionofthe
three-phase
at

all

loads

sponding

size.
especially
torque

with

Furthermore

and

voltage,

in

the

distributing
quently,
mit

wherever

three-j3hase

phase.

The

Cored

hold

the

stator

in

this

design

mechanical

which

perfect

and

actual

through

have

understanding

the

materialsintheir

vs.

Three-Phase.

motors

than

at

full

are

two-phase

The

power-factorishigher

light

loads

load

currentisalso

for

given

the

amountofcopper

system

service

motors

Frame

are

commonly
punchings
and

the

design

been

and

durabil

obtained

only

of

operating

skillful

conditions

combination

proper

pro

Duetothe

stator

slightly

more

windings,

efficient

motorsofcorre

and

the

starting
greater.

requirementsofload

required

is

less,

conse

conditions

will

per

preferabletotwo-

employed

has

been

eliminated

weightofthe

motor

the

PROPELLER

phase
resistance
recommended.

to

flanges

POLYPHASE

THESE

wound

The

Bearing

and

TYPE OF

RIVETED

FANS

RANGE

rotor

connected

Brackets

so

VENTILATING

FRAME

INDUCTION

FROM18TO48INCHES

IN

DIAMETER

and

external

through

are

boltedtothe

arranged

that

FAN

DRIVEN

secondary

slip

by

MOTOR.

rings,

turning

BY

is

end

them

through

relative

mounted

VARIABLE

These

motors

circuits

and

operate

continuously

torque

from

power

output

The

Bearings

Lubrication

rings

of

continuous

the

bearing

The

oil
indicate
to

facilitate

The

Sliding
accurate
weight,
The
floor,

and

same

wall or
locationissuch
hasalarge
nent

the use

ticularly

Foundation

those

showninthe

an

angleof90orISO

to

the

frame,

on

the

floor,

SPEED

are

rangeinsize

full

being

FORM

INDUCTION

wound

from?4h.p.to10

without

load

speedtol-j

reducedinproportiontothe

are

is

effected

large cross

supplyofoil

brackets
reservoirs
the

its

are

quantityofoil

withdrawal

Base

alignment,

easy

adjustmentofbelt

base

can

ceiling

that

and

unavoidable

of

the

recommended.

Platesofcast

accompanying

canbefurnishedasa
considerations
advantages

This

arrangement

iron

castings

wood

screws

for

the

motor.

more

of

the

consistsoffour

together

for

them

Catalogue

the

motor

side

wall

M

RIVETED

MOTOR

for60cycle,

excessive

of

section

to

full

liberal

by

from

the

fitted

220,

heatingatfull

load

means

which

the

rotating

with

present

when

providesinall

even

be used

distribution

equally

suspension.

the

driveisvertical

vertical

standard

iron

substitute

than

offset

standard

with

and

the

holding

No.

103504

sliding

GENERAL

HLECTR1C

degrees,

can

or

ceiling.

FRAME

440or"i50

h.p.

They

speed.

load

horse

speed, the

proportions.

of

solid

carry

oil

wells

shaft.

gauges

and

taps

desired.

cases

tension.

well

If

the

compo

baseispar

similar

illustration

where

the

price

obvious

base.
malleable
necessary

down

bolts

covers

COMPANY

the four

be

does

nol

illustration.

The
motorsisgreater
thanisusual
induction
the

small

element,

Temperature
motors

load

continuously
above
deg.

C,

hours

withatemperature

55

deg.
slightly
of

volt

will

corresponding

meet

the
standard
loads
heating,
operatedatnormal
a

temperature

a

guarantees

in

to

Totally

required

dustormoisture

for

of

for

or

to

RIVETED

DATION

OF

ties.

For
motors
ets

and

ducts.

Small

castings,

include

Starting

Torqueofthe

in
motor. This
size

and

insuresavery

are

guaranteed

the

surrounding

and

25

C.

Enclosed

below

the

above

temperature

guarantees

for

short

consequently

rise

for

the

Enclosed

for

installations

FRAME

INDUCTION

PLATES

SOMETIMES

THE

STANDARD

such

conditions,

are

supplied

special

This

method

Polyphase

bolts

the

wood

and

Motors

wood

block

4933-3

screws

showninthe

riveted

foragiven

the

squirrel

weight

rapid

Guarantees.

to

current

cage

fact,

together

of

the

acceleration.

All

carry

type

revolving

standard

their

withatemperature

air

not exceeding

per

cent,

normal

open

overload

rise

motors,

horse

motors,

not

with

power

will

for

exceeding

readily

guarantees.

provide

periods

enclosed

outputifdesired,

for

without

motors

heavy

injurious

allowing

somewhatinexcessofthe

open

motor.

motors

are

presentinlarge

with

stator

of

are

frequently

where

acid

MOTOR

SLIDING

SHOWING

EMPLOYEDINPLACE

BASE

the

riveted

solid

bearing

flanges

without

enclosure

fumes

quanti-

does

but

frame

value

with

rated

rise

two

rating
rating

The

over

can

FOUN

frame

brack

of

40

be

or

air
not

GENERAL

ELECTRIC

COMPANY

4938-4
permit

waterproof
specific

BACK

nearest
nearly

Small

its

useasa

construction

proposition

GEARED

TYPE

local

complete

Polyphase

RIVETED

KT-4—3H.P.—

officeofthe

possible.

Backgeared

very

moderate

numerous

Motors
belt

slow
driveisdesirable.
60

cycle

back

geared
motors
ratioof7to1

Vertical
advantages
and
similar
particularly
and
mine
since
venient
also,alarge
ard

will
shafting,
with
tion

for

mine

machines.

are

sumps,
the

industrial
often

marked

and

The

riveted

vertical

is

available

.

Motors

for

pumps,

efficient,

readily

shaftsorother

motor

height

field

resultinthe

quarter

improvementinfacilityofopera

space

frame

motors

Motors

watertight

motor.

is

necessary

shouldbereferredtothe

FRAME

INDUCTION

1800-220

Company,

VOLTS

with

statementofrequirements

are

often

used

speeds

moving

driving

adaptable

are

devices

A

full

lineof25,40and

riveted

with

possess

centrifugal

centrifugal

The

combined

substantial

for

needed

where

frame

induction

standard

certain

deep

driers

units

and

installation

and

positive

marked

compact

confined

can

be

locatedatany

above

applications

for

the

vertical

pump.

There
motorsinstand
where

their

eliminationofextra

turn

belts,

bevel

gears,

economy.

constructionisemployed

up

to

and

including

Where

each

MOTOR

where

for

gear

well

and

are

space,

con

use

etc.,

7H

h.p.at1200
and

windings
horizontal
and

standard
constructionofcoils,
teesofefficiency,
overloads

Multispeed

cireuits

only
operating
automatic
service
but
These
riveted
nished
ing

power.
constant
r.p.m.

requiring

practically

motors

frame

for

either

They

speeds,
Neither

used with

as

being

as

obtained

ingofthe

in

is,

STANDARD

TION

MOTOR

r.p.m.

and60cycles.

are

identical

motors

of

practice

rotor,

power-factor,

areasgiven

Motors

and

are

machine

tools,

refrigerating

several

constant,

are

built

construction

operation

constant

are

under

torque

designed

viz.,

resistance

these

stator

VERTICAL

by

coils.

TYPE

motors,

changing

SHAFT

KT-4^5

with

corresponding

is

followed

etc.

for

standard

are

built

for

especially

printing

plants

and

widely

running

with

the

and

conditions

or

constant

to

600, 900,

1200

nor

the

the

RIVETED

H.P.—

1800-220

Punchings

thoseofthe

ratings
in

the

The

guaran

heating

and

motors.

three-phase

suitable

for

presses,

for

similar

separated,

speeds.

standard

can

be

fur

requir

horse

run

at four

and

1800

reactance

four

speeds

polar

group

FRAME

INDUC

VOLTS

is

GENERAL

ELECTRIC

COMPANY

Small

Polyphase

Motors

1,933-5

Constant

ranging

12

h.p.

from

and
anyofthe
output

type

being

of

—

Poles

G

4

6
4

6
4
ti

4
0
4

0
4
6

4
15
4

4

*
t

These
Full

H.P.

10

15

Torque

will

four

2%

fixed

Motors

h.p.

develop

speeds,

are

up

to

constant

the

proportionaltothe

motorisrecommended

TWO-

AND

CONSTANT

—

CYCLES

60

tSyn.

Speed

1200

X

1800

1200

A

3.,

1800

1200

1

1

\A

Hi

2
2
3

~A.

load

1800

1200
1800
1200

1800
1200
1800

1200

1800

1200

1800
1200
1800

1800

ratings

are

speedisapproximately5per

Frame

110

110

112

111
120
112

121

*

121
122

122

140

140

11)0

160

180

180

181

181

201

not

carriedinstock

madeinsizes

and

including

torque

horse

speed.

for

at

power

This

driving

THREE-PHASE

SPEED—

Poles

i

4

6
4
0

4
6
4

6
4
6

4

TYPES

KT

40

H.P.

X
X

a

A

1
1

2
2

3

3

.ri

5

1A

but

canbefurnished

cent,

lower

similar
the

same

With

applications

poweratall

constant
controllerisfurnished
constant
controllers

horse

areofthe

INDUCTION

LOW

VOLTAGE

AND

KQ

—

-

CYCLES

tSyn.

Speed

1200

1200

1200

1200

1200

1200

1200

800

800

800

800

800
800

—

Frame

*

110

*

111

*

112

*

121
122

*

140

140

*

160
160

*

180

180

*201

201

1

than

withaslight

the

synchronous

requiring

speeds.

torque

and

power

motors;

drum

MOTORS

—

Poles

H.P.

2
4
2

4
2
4

2

l
l

2
2

4
2

3

1

3

5

4

5

2

TA

delayinshipment,

speed

approximately

motors

the

bothofthese

type

.

CYCLES

25

tSyn.
Speed

1500

X
X

1500

A
A

1500

1500
1500

1500

1500

given.

the

T-46-B

and

arranged

750

750

750

750

750

750

T-54-A

with

—

Frame

*

110

*

111

*

112

*

121
122
140

140
160
160

180
181

201

201

—

fans,

blowers,

where

the

speed.

Constant

size

from1h.p.

and

will

at

any

especially

small

power

required

Horse

uptoand

develop

of

the

their

four

recommended

printing

Power

full

fixed

decreases

Motors

including G

rated horse

speeds.

for

machine

presses,

with

range

They

tools

etc.,

the

in

h.p.

power

are

and

to

give

the

four

forward

equipped
large
bility
brackets

and

Grinding

dust

and

reverse.

Motors

with

proof

minimum

are

circular

shifted90degrees

speeds

are

especially

bearings

wear.

in

with

referencetothe

above

totally

heavy

which

form

mentioned,

enclosed

shafts

insure

The

bearing

and

can

and
and

relia

be

frame

GENERAL

ELECTRIC

COMPANY

4033-0

AUTOMATIC

GENERAL
ARD

Small

A

TYPEKT3

Polyphase

CHUCKING

H.P.

FOR

Molars

MACHINE

INDUCTION

ELECTRIC
EVERY

CLASS

A

FEW

DRIVEN

MOTOR

MOTORS

BY

OF

EXAMPLES

METAL

1H.P.-

ARE

THE

SERVICE

OF

INDIVIDUAL

CUTTING

1800,

SAW

220

VOLT

CURRENT

WITH

ALTERNATING

MOTOR

RECOGNIZED

REQUIRING

DRIVE

TYPE

KT-4-

STAND
POWER

PONY

CYLINDER

TYPE

PRESS

MT

RIVETED

INDUCTION

DRIVENBY2

FRAME

MOTOR

H.P.

42-INCH

TYPE

BORING

KT-6—5H.

INDUCTION

MILL

OPERATEDBYA

P.—

1200,

MOTOR

220

VOLT

GENERAL

ELECTRIC

COMPANY

Small

Polyphase

Motors

J,933-7

WITH

G-E

POLYPHASE

COLD

SAW

DRIVEN

2

H.P.

1800,

FRAME

GENERAL
TO

FULLY

BY A
VOLT

MOTOR

TYPE

RIVETED

220

ELECTRIC

SATISFY

RIVETED

KT-4

—

MOTORS

THE

EXACTING

FRAME

ARE

MOTORS

RIVETED

FRAME

DRIVING

DESIGNED

DEMAND

INDUCTION

SAW

AND

FOR

TABLE

MOTOR

BUILT

QUALITY

60-INCH

GEAR

BYATYPE

INDUCTION

CUTTER

KT-5

MOTOR

DRIVEN

HP.

BEEF

GENERAL

SLICING

ELECTRIC

INDUCTION

MACHINE

RIVETED

DRIVENBYA

FRAME

MOTOR

GENERAL

ELECTRIC

COMPANY

4933-8
in

on
is
grinder

GENERAL

away
and
expedites
and

Buffing
to
following
ments
longer
for
buffs

Small

caseitis
the

wall.

completely

units.

ELECTRIC

MOTOR

with

file

for

the

affordsamore

Motors

the

grinders

exceptions:

are

and

securing

are

not

Linotype

panying

illustration
exampleofthe
motor

design.

Polyphase

Motors

desirabletomount

No

machine

equipped

The

WITH

DOUBLE

the

cold

smoothing

work,

without

motor

RIVETED

chisel,

up

reduces

shop,

grinder

EXTENDED

finished

are

similarinconstruction

mentioned

tool

omitted,

while the

hasathreaded

the

buffs.

furnished

Motors

as

Emery

with

shown

areaunique

possibili

The

tiesofhighly

unit

consists

the

machine

largeorsmall,

oneofthese

largely

FRAME

chipping
small

the

GRINDING
SHAFT

hammer

castings;

labor

product.

above,

and

with

water

shaftismuch

taperateach

wheels

these

in

the

and

striking

specialized

essentiallyofa

does

charge

the

attach

end
and

motors.

accom

of

which

carries

tion of
highly
ratedat]/±

motor

driveissimple,

efficientinoperation.

h.p.

and

25,40and60cycle

Starting

down

Compensators.

the

excessive
FormKinduction
rotor,isthrown
customarytorecommend

compensators
capacity

sists

essentiallyofan
vided
means

with

of

and

which

for

larger.

several

it

the

driving

belt.

The

are

wound

for

cireuitsat110or220

In

rushofcurrent

motor,

directly

all

with

on

the

motors

The

compensator

the
useofstarting

inductive

taps

and

current

may

The

compact

motors

operation

order

squirrel

line,

of

lx/i

winding

a

switch

be

supplied

adapta

and

are

volts.

to

cut

when

cage

it is

h.p.

con
pro

on

a

by

at

RIVETED

riveted

FRAME

EXTENDED

BUILTINFIVE

frame

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