General Electric General Electric Co. Brush Shifting Motor Instruction Book Instruction Guides

BRUSH SHIFTING

MOTOR

Type BSS Form C

Single-Phase Varying Speed

Q“A°o

is

‘.

£315‘

\

INSTRUCTION BOOK

No. 81516

SPRAGUE

OF GENERAL ELECTRIC COMPANY

527-531 WEST 34th ST., NEW YORK, N. Y.

ELECTRIC

WORKS

-—-~

-~

v-vi"

Fig. 2. TYPE BSS—S64-4-2—l800j900

MOTOR

SHOWING

ROCK SHAFT ON

SIDE FACING COMMUTATOR END

FORM

CR~lI0,‘Zl0-6d“CYCLE

LEFT

[Fig. 1.

s

TYPE BSS-564-4-2-l800;900 FORM CR-l10,«'220—60 CYCLE

SHOWING STANDARD ASSEMBLY OF ROCK SHAFT ON

RIGHT

SIDE

FACING COMMUTATOR

END

MOTOR

Fig. 3. TYPE BSS—S26—4-¥§—l800,‘900 FORM C 60 CYCLE MOTOR

47/

, (A) Location

,

III.

VII.

VIII.

I.

Partsand.—\cccssori:-s..............,..................

II.

Installation......,..,..,,......r.,........_...,..r..

. .

.

.i. . ... ...

(B) Foundation

(C)

Methodof

(D) Floor, Wall

Connections

.

(A) External Wiring (B)

Fuses.............

(C)

l\‘IethoclofCont.rol..,.......................

IV‘. Starting,

Initial

V. Operation and Cari:

(A) Operation

(B)

GenoralCare................,i.............

.

. .

. . . . . .

. ,......

. . . . .

.

Bearings

Brushes

.

. .i.

...

.

_

or

Ceiling Moiinting.

.

. ..c

...i....... .

for

BSS

...

... ....... ... .

.

. . .

........... ....... ... ... . .

. .

.

. ... . . ..... . , . . . ... . ... . . . , . . .

......,

.....

.

..... ... ... . .

.

....... ,...... .

Brush Setting and Fitting

Commutator................,...._..

Slotting Cominututor.

VI.

Attachments......i......,,.......r..................

(A) Sliding Base

(B) Bclbtightcncr

... .

.

. ...

.

. ,

.

. ...

.r...

Locating and Correctingl'l‘ronblcs.

(A) Mechanical

(B) Electrical

(C)

MotorFa.ilsto

(D)

AbnormalHcating...........................

(E) High

(F)

Low

(G) Sparking

(H) Low-starting Torque

General Information

.

... .

. ..i...-.

.

. .

.

. . . . .

.

...

No-loadspeed.........................

Running Speed

at

Commutalor.

.

. ... .

. .

...

... .

.....

...

(A) Energy and Compensating Circuit;~:~. (B) Locating

Neutral

. ... . , .i. ... ...

(C) Checking Compensation. V

IX.

Supply Parts

...

.

. ...

.

... . . . . . . . ... . ... . . . ... . .

......i

...

.

.....

Motors

. . ._. . .

. . . ...

.

t~IhA4

. ...

.

. ,

.......

... . .

....

... ... ...

. ...t. . . .. .

.

...

. ...

.

i

.

....

.

A

...

.

. . . .

.

. .....

i

.'

. .

. .._

_..._

. ... . .

.

,

A

.

. . . ._..... .

... .

. .

. ... .

.

. .

.,. . ... . ... . .

...

. ...

.i.

. . ..

‘

.....

.

......

....

.

. ... . .

,

. .

. ...

... . .

.,..

. .

. . ... .

. . ... . . . .

.,.

.

,

... ._. .

.

..,.....

.

i

r

._, ,,.

.

. .

... ...

. ..._,,,

. ,..

.

. . ..... .

. .

... . .

,_,

. .

,_,

PAGE

5

..

‘I5-L'IC}|‘\'.;i

.

. .

tCt£J~’.C'£

ll

11

13 13

..

13

.

..

I3

, .

.

14

.,

15

..

.

..

.

rural‘...

'M'~l‘I‘|‘l

-4»-A

L"C

.

..

ll}

20

_ _

20

.

20

.

. .

,

4,,

BRUSH SI-IIFTING MOTOR TYPE BSS FORM C

SINGLE-PHASE VARYING SPEED

I.

PARTS

"ho

l.k‘l'lll

“

xx-"1111.-.111 21('t,‘C‘3~'I\'UI'lL‘§, i.C-., pulli-y, lm.<c

Motor"

sztling winulings of {host

series uuto~tran.<l'ornicr which in the

2-h.p. l8U(l»r.p.m. motor, is mounted

which. starting with the 3-h.p. IHUO-r.p.m. size and above, is mounted

separately. Thir: Lrnnsfornn-r

of tho

motor,

or

the

motor.

factory and

that

\\‘l1i’l'L‘

C()I]Il€“(‘l,(‘(l nccorrling

shipped separately. is always <-onsirlercd 11$ :1 part of

T110

motors

an:

shippcil il.:5St‘IUl)lL’|.l.

the

transformer is sliippcd separately, this should be

to

from tho factory 8.SSCl1ll)lL’d for floor

rotation

orclerml

the following

I’ullv_v

(facing the CO111II1l1l:tl.r)I‘ end), zmrl

The following

with

P;\R1‘s

.-\xo

ll

If

.<t.'u1«.larcl diinensiuns

If

.<pi*cinl dimensions

are

tho machine

will

:1.<<isL in l'|t2E!.llI'lg an-l Cl'lL‘L‘lill1g

:\(‘(‘l~‘..~‘«S(1R[l-is

Sliding bnsc

Belt-tiglitcner

Control

linvlosing

(levicu

cow.-1'3

Conduit tvrminal

Control

'I‘rau.<fo1'1nc1'

(A) Location

£lCCC.H’Sll‘)l(‘

(B)

of

«lrivon unit, propm'l_V leveled and scciiroly bolted

lLl1L"S(‘ instriictions

l)asu is used,

apparatus

It

is dcsi-x‘alJlv

Foundation

Suitztblc

the

motor.

that

for

inspection and

rnezins

must

The 1'T‘tiI.L‘l1lnc should then be properly aligm-cl

are

see

followed, undue

page 16.

AND ACCESSORIES

\\'llL‘!‘L‘ u<e<l, is intondcxl

or

control tlevicc. Thu

motors

(‘1)I]:~‘lSl2 of

smaller

on

wlicthor

are

L'£ll'L‘l\1ll_\’ in.~'pc(:Lcd and tcstml

:~‘l{E.‘h‘l1.

All

mountml

for

operation, \\'ll'.l1 the cxception

.~‘tu.nr,l:ml BSS

installation

sonic

of the parts and accessories, frequently

to

meet (.‘L‘l'LZLll1 conditions and

BSS

MOTOR

How

l’;i~:tem-ll Cm sliaft

L's11:1ll_v shipped separately

to

rover

a

Lzippoil off portion of :1

sizes.

up

to

the sixle of the

as

an

motors

for counter-irlockwise

are

conn

cc-ted for 22.0 volts.

their

receipt.

Siilm-no

Separately

Buxeul .<(rp:11'atL-ly

Boxe-tl .~:cpzn':itcl_v

Fil.Sl(‘f‘lL'd

Tied

Scpar;_I.tcl_\‘

to

111(l.Cl1lI1L‘.

on

machine

Separately (over 2-h.p. sizes)

II.

INSTALLATION

lllv

macliine he

Cari‘.

bc })l'0\'l(lL‘(l

so

plnnctl a.S'to be easily

to

support rigidly the Weight

into

place. Unless

vibration

will

result.

thv machine

compon-

and incluiling

motor,

and

integral part

at

the

are

shipped

if

so

ordered

with

the

If

sliding

81516-6 Bruriz .5‘/zifthzg .Mol0r Type BS5

(C) Method of

(1) Belt

ment

is obtained between the

driven machines, and

load Without slipping.

the

lower

Fig. 4. TYPE BSS—5'70—4-3—l800_»'9(J0-CR-110/220-60 CYCLE

HANDLE AND SECTOR CONTROL SHOWING

POSITION

Horizontal belt (lrivcs

as

much

as

Tbe smooth side of

I

Pulleys for double belts should be 9 inches

The

use

close

or

belts of

of endless belts is reeo1mnenr.ler.l. Pulley should be placed

to

the bearing. Where is is necessary

vertical

Excessive tension should be avoided

proper

Drive

Drive:

Care should be taken

that

If

side of the belt

RUNNING

possible.

belts,

a

belt-tightener should be used,

Width. The following

center

of the pulleys of the driving and

the belt is just tight enough

to

possible, the

will

be

CLOCKWISE LESS TRANSFORMER

are

best.

belt

should be

the

driving sidc.

Vertical

motor

should be plztced

belts should be avoided

to

as

far

as

statement

cheek:

One inch width will

‘

for each 1000 feet

of

transmit

hell speed.

withi Smg1Cbe1ti1.1g—1 h‘p' it

2‘ double beltmg——l.~L h.p. l

see

that

proper align-

to

car1‘y the

so

FULL

MOTOR

SPEED

WITH

pulley.

or

more

in

diameter.

have short belt

see

page 16.

possible by providing

will

afford :1 rough

centers

that

Brurh Shifting M'otor Type

(2) Gear and Direct Connection: The units should he rigidly

mounted

taken

(3;

to

on

secure

Chain

and fastened

good alignment.

Drive:

to

a

mmman

l\IounL the

base, and great

motor

S0

that

tightened. Align the machines accurately when

(D) Floor, Wall

All

standard

or

Ceiling Mounting

motors

shipped from the factory

the

BS5

care

the chain

chain is

are

assembled

81516-7

should be l

can

taut.

floor installation, unless otherwise ordered. To change for Wall

Fig. 5. TYPE BSS-570-4-3—l800,‘9D0—CR-l10.’220-60 CYCLE MOTOR

SHOWING ARRANGEMENT OF UNIVERSAL JOINTS

BOARD BEARING

ceiling mounting

position

that

the

the machine is

as

indicated below:

in

AND

it

is necessary

oil well

its

covers

desired position and

.\'o1'E.—\\'lienever the end shields

surfaces of the joints

or

tightenerl.

so

affected

in

the

SIDE WALL S(,TSPE.\.’SI()N

oil

that

well

are

If

this

the bearings

until

the

perfectly clean before.-. the sliiclds

precaution is

machine is

For side wall suspension

rocker shaft. being

ordering

motor

from

on

the

side

the

factory. The factory

with top of frame machined

installations, this

readily changed from

will

one

not

side of

be necessary

HAND

CONTROL

to

turn

will

be di1'cctl_v above the shaft when

not

will

heat unduly. Oil should

in

position.

if

the local conditions necessitate the

it

will

be necessary

AT

both end shields

to

change the brush rigging

are

removed,

taken,

the

will

to

take rocker shaft support. For

as

motor

the rocker shaft

to

the other.

OUT-

A DISTANCE

to

such

see

that

are

replaced.

alignment lIl&_V he

not

be put

to

so

specify‘ when

then

ship the

can

be

for

or

a

the

motor

most

be

"~.,,,3z.5m—s Brus/zr Shifting Motor TypeABSS

1st. Remove the bolts holding the end shields and unfasten

the leads

yoke together through

“A,”

and “Ag,” and

rotate

the

an

angle of 90 Liliegrces, and fasten the shield

in place. The pulley-end shield shouldibe

as

the

commutator

end shield

was

rotated.

2nd. (a) Four-Pole Motors.

*Rcplace the compensating leads “A1

’sthe

two

leads by fastening

similarly lead "A2"

on

stud

“A;"

“A..”

lead

on

commutator

rotated

"

and

end shield and

through 90 degrees,

“A2"

but interchange

the stud marked

Tfifllvsmflfflfl

“Ag”

and

Brush Shifting Zllotor Type BS5 81516-9

III.

CONNECTIONS

(A) External Wiring

NOTE.—Motors should be

arithmetical

name

sum

of the variation in frequency

plate stamping does

voltage and 10 or cerii:

10

per

cent

variation’

in

voltage—or 5 per

run

only

on

circuits

and

not

exceed 10 per cent, i.e., either normal

variation

in

frequency—normal frequency and

cent

frequency and 5 per

voltage.

All

installed in accordance

wires bringing the power

with

to

the

motor

the National Electrical Code

local requirement, and should be of ample capacity.

r

('9!

‘

on

which the

voltage

from

total

the

cent

.

should be carefully

and

any,

7'54

yvctufl/-1:3

rm,

.4.

p

4

'

.

I

Wo-

or

Six-P616 Me‘

“A;

"land

“

A3" 011' uds

er

posit§Q}:x;ifor_aAnew indicating

af&d“éneut? 1”‘ (see page 21).

the bolts holding‘ he end shields and unfasten

anglé'6?180 degrees and fasten

_

A

I

,

:‘l‘eads "Ag"

together through

we 5

1 the

-

sxox

_

ve

,

“Ag,” andiietate the

an

The pulley end shield should be rotafid

2II1d- (a) Four‘-Pole Motors. _".

*Replace leads

in connection“

“A:

or

(b)

”

brush position is xi‘

Two-

or

and “Ag

Six-Pole

”

to

*Reverse the compensating leads}

"Ax"

and "A1"

*i_\'o1');-:.——It

"A2"

in

replacing. '-

on

the brush studs.

may

be necessary in'certa.%"pases

-

i

s.

to

which they

"

commutator

in

a

similar

'

ir

respective studs. No change

were

end shield and yoke

the

shield

manner.

ary.

,

‘Hy interchanging the

.

to

lengthen either leads "A1"

formerly

or

bearing

in

two

place.

leads

_

,

“stain

Fig. 7. 110-VOLT CONNECTIONS BS5‘ MOTO

(B) fuses

i

"

A suitable switch with fusespshould ilinéfialledi’ the line

protect the

motor.

Switches should be placed in

reach. of operator.

4

(c) Method

of

Control

The brush shifting

speed

away

motor.

from

The speed

thétunning positions. ‘ti’

Brzforeflnstalling controller

yoke of the rn-mor. Three marksare inscribed t.he.reon;-two of which

or

.319 ‘marked by‘ arrows and

see

Fig. 4. There ‘is

motor

variation

one

»

_

.

is} primarily a. constantfique varying

‘X

'

an

acces§ble plac nd

1!

-

F

ii‘

-

1

is obtained by shit the brushes

it

the

center

reference

is advisable

one

mark

to

examine the brush

marked by the world “off,”

onithe

beafgg housing of

to

within

\,

\-

§1ower the speed

-

81516’-10 Brush 5/ziflizlg ./llolnr Type BSS

the

motor

called the ‘indicating" mark, aml,

marks

on

various speeds and reversals of

the yoke

Y\"hen either of the marks indicated by

indicating mark, the

clockwise

direction

The

nearer

or

as

“elf”

The BSSi'=n1otor,s

are

changed

in the

motor

operates

clockwise rotation (facing

the

arrow

points.

point is the position

the

“ol’f"

point is brought. Lu the inclieating lT‘.LtI‘l{, the

will

be.

GBABLE VOLTAGE CONNECTIONS

RUSH

'

'\

are

all eq yed with

relation

motor

at

'

SHIFTING

as

the position of the

to

this indicating mark,

are

obtained.

arrows

coincides

the highest speeil.

eominutator

which the

end; the

mutm‘

1./N!

/10

MOTOR

lirnsh

sliiiting Ill(‘c‘iiétI}iSl2l

901.78

the

with

the

enn11ter~

sztme

i't-vex-ses.

of extreme simplicity. ".L7his., anism ¢L~n.~‘i.<t.< of .<li-at": support,

rocker shaft, stop coI1ar§.;r'

ring for limiting the ‘Ire. This Stop ring is rim-.1

screw in t1'_ae.';:enter,~._:i\;.hi3,'11' _‘

reversible _'a"tion

It

will

.gc$tice§t',£iiu=m, l

one

Side of the

necessary

other

side of méiiéw.

motor

'

to the other.

,

to

In installing e;Qzi"t%fier make

handle is in the “off,” position, the

with

the indicating mark

used both with chainland rod type of

slack and

to

give :1 finer adjustment of the apparzitus.

i

-

m

and

link.

’l‘1iert- is also

-

the

motor

'

‘

-_:

screw

".‘:‘:l't support is easily elmngexi from

..

In

'

linikovcr so

"

‘

very readily done

Changing

“oii"

on‘

the hearing lionsing. '1‘urnlnit~liles

nuidirectionzil.

is simply removerl.

this

thatitwill

as

inspection

sure

that

mark

on

control

apparatus tr.» t,al<e

a

stop

with

In

case

over

it

will

also he

point towar-I the

will

:~i1()\\'.

when the control

the }'ui£€ is in

line

are

up

Brush Sliifting .lIa[nr Type BS5 81516-11

Fig. S1 page L2, .\'il£)\\‘.~' the tlifierent coiitr--l apparatus which is

l'(‘a<lil_\' installed in Connection

only iiecessziry

control devices

set

up the control .'l[)p.’1l'.’llll‘.~‘

to

connect

to

the rocker shaftonthe side of the

IV.

Before starting 21 machine

ll)

.\lnke

sure

that

the oil wells

eomiiiiirzitur

(2') Ru:-move all external load

by lmnil

(.3) Clieck all the

grams, inaking

are

filled with

and other parts

to

see

that

sure

it

that

runs

the controller is properly Séii-'Ltp, and 21.150

contact

controller, starting

to

:1

initially started, the

miu1vefr¢'cl_v and carry

with

the

(:U1Illllul£tIOl'..

I

(4) V\'l1en starting the

fmni

give the «,1:-sired rotutionf Tliis. gives

new

machine (or

an

old

oil

rirzgs should carefully walcliedjo see that they

it

sufirienl T ztity of oil to me shafl. Tlierezifter,

the oil rings need p1'.’u‘tiL":1ll}' no‘

ml" oil is muintaineil in the oil

name

refer

(5) See

NOIL-*.#l[

to

that

plate,

the line voltafige corresponds with tl1é‘vplt_agi:

(see

page 9,

any trouble is experienced. open the lin'é;—:sv’vitcl1, and

page IT for 2tSfi;tlaI1£'C in locating the «lifiiuulty.

V. OPERATIQIW

:1

N()'l‘F..é:\l1 Instruction. (fin-rl is shipped

This

eziril gives in brief

(mil stopping

care

and attention.

office of Hit! comp:in_v

C.\Rl)

After

ll

inotnr, and the principa_Ipeii1t.~: which slioulrl receive

If

8116]‘)

will

UP .\'E'.-\R I£A(_‘l'I

machine has been installerl p,1'o1ici‘l}',_ii_1v aceordzmee

pri-eerling clirections, and is

will

give the necessary

points’ listed under “(,':1re"

z1t.ti~nt'ion under normal (‘.(JI1('lilSl.Ul'15.

with

the rocker

that

STARTIN

for

all bolts,

a

goo-l grade of mineral oil, and

are

all parts

G,

the

nuts,

clean.

if

possible, and

arm

INITIAL

lirst

or

move

time:

and

ztrms

screws

freely.

extorn

l

wiring eunnectir'>iis'

the Stnrldurd BS8

freely.

turn

I

motor.

of the

motor

are

the

with

hettrfizsfrirnier is properly‘ connecfecl,

that

brushes rnake

motor

it

is advisable

the

“ol‘f"

position and shiftgflg in‘ ciireetion

a

low

one

Whiel

as

been changed

tion

We

-

“

C0l1I'1(‘k.‘l.l(,)l1S")‘.. 9

AND

form

the necessary instructions for stariiing

it

ezml is Cl1ltlt'<_l herewith, the

':~'.1ippl_\' zi cop)‘ upon request.

to

make ti§_e of the

starting qurreiit.

as

long

as

tip-oper supply

CARE

with

ew_er_v lI1{l\“l;_Li,_n€.

"

r

"‘

TACK

i

.\lAt‘HI.\'E.

in

gooil ()1)('I'il.liI1§.{ cnmlition, the‘ following

instructions

will

for

cover

in

actual operation, and the

tliese points

which

It

-lifierent

and

tigiit,

tlmt

that

the

armature

the dia-

that

firm

even

-

\Vhen

repaired) is

_

.

on

the

nearest

THIS

with

the

require

is

so

GROUPS

Chain—Reversiblc.

OF

Controlle-r—Non—Reversihle.

Controllcrglkeversililt-.

DESCRIPTION

and

9.

Rod and

Rod

Control.

Fig.

19452-l—Ci-auk,

19-'l.")2Ii—li:1nd

19452.,'i~Crank,

N

l\o

No

l—

2—Cat

3—Cat

Group

Bearings.

Pulley.

and

Control.

Friction

Foot

and

Control1er—Double

Controller~—~Double Chain-—Non-Reversible.

Cor1troller—Single Chain-Non-Reversible—Sp'g—Rcturn.

]'oir1ts—Shaf|:s

Rod

and

527—Crank

l94528—Crank

194

194529—Crank,

l945.'iO—Uni_versal

he

No

5—Cat

6—Ca.t

7—Cat

8r-Cat

Group

Base

l9453l—Spr1ng

I\o

9—Cat

Group

and

194526-—Crank

No

4-—Cat

Brush Shifting Jllotor Type BS5 81516-13

(A) Operation

To

start

motor:

(1) Close the main switch.

(2) When starting

troller, starting from the

give desired

To

(1) Open main switch.

stop

rotation.

motor:

motor

it

“off"

is advisable

position and shifting

to

make

use

of

in

direction

con-

(B) General Care

To insure the best operation,

made

at

least

once

a

week. Points

as

follows:

General Cleanliness: See

the machines

The

control

parts

more

time

that

important

are

kept free from water,

device should be inspected periodically

freely, and that yoke is in the

handle

or

foot

in

order

to

control is in the

get the best operation from the

a

systematic inspection should be

to

be given special attention

that

both

the

interior

dirt

or

grease of

‘‘off’'

“off"

any

position

position. This point is

and

exterior

description.

to

see

at

motor

the

that

are

all

same

and

control apparatus.

Bearings: See

viding

proper

belt

tension

The oil wells should be kept

light mineral oil, flush

filler

gauge.

otherwise

flowing when

overflow hole.

be withdrawn, fresh oil poured through the bearings

sediment, and the oil wells refilled.

a

that

excessive heating and

wear

is prevented by

lubrication, and avoid excessive strains due to

or

the improper alignment

with

the top of the overflow hole of the oil

The

oil vfell should be

false

oil

level

will

the

motor

is stopped.

After

the

motor

be obtained, resulting in

of

other

filled

with

filled

when the

Fill

the oil wells through the

has operated

In

normal service

transmission devices.

a

good quality of clean,

motor

a

week, the

pro-

too

great

is

at

rest4-

the

oil

over-

oil

should

to

wash

out

all

the

bearings

should be washed and refilled occasionally, the frequency depending

upon

local conditions such

room

temperature, cleanliness,

it

should be securely tightened

changing the oil,

is

in

proper

“’hen

armature

and

new

ones

mum

air

gap gauges

Brushes: ‘See

at

the

same

that

the

proper

it

would also be well

position and turning freely.

the bearing linings become excessively

is

in

danger

substituted.

that

time

make firm,

brush tension is maintained by

as

the severity and continuity of service,

etc.

In

replacing the draining plug,

to

prevent gradual leakage.

to

make

sure

that the

worn

of

striking the field, they should be removed

(See Cat. No.

may

be secured from the Company.)

the brushes

even

move

contact

on

part

name

plate.) (Mini-

freely in the holders, and

with

the

commutator, and

the

springs.

so

After

oil ring

that

the

to

of

81516—I4 Brush Shifting Jllotor Type BS3

It

is always desirable

The Cat. No. covering

part

name

BRUSH

plate fastened

FURNISHED

to

keep

the

proper brush

to

each machine.

WITH

an

THE

extra

MOTOR

TO SECURE GOOD RESULTS.

When replacing

means

of fine sandpaper folded around the

by hand in the desired

4.

4,

worn

down brushes, they should be

rotation

4,

until

a

set of brushes

to

be used is given

THE

SAME

MUST

commutator

proper

fit

on

GRADE

BE USED

fitted

and revolved

is obtained.

hand.

on

This

the

OF

by

Brush Shifting Jllotor Type BS5 S1f';:I6~15

sandpaper

commutator

above.

speed during the polishing, and sandstone

moved back and

this has been done,

commutator

remove

used

to

tighten the

on

If

this

may

be used by pressing

with

a

block

of wood shaped

In

both

cases

the

commutator

forth

along the surface, parallel

in

order

to

it

like

should be

prevent cutting

and brush faces should always be carefully cleaned.

any

grit which

a

commutator

treatment

commutator

may

have adhered. Emery (lath

or

brush.

docs

not

remove

the trouble,

segments and

against the surfacéyfifithe

the sandstone mentioned

run

at

a

high

or

sandpaper should be

to

the shaft.

or

it

turn

may

down the

scratching. the

rate

After

must

never

be necessary

commutator.

of

to

be

(a) Two and Six-Pole (b) Four—Pole (C) Six-Pole (cl) Four-Pole (6) Six«Pole

Short circuited brushes A: and A4

Small

motors

have

one

but

usually

are

one

connected

are

can

than the

of the

Al and A2

no

compensating brushes.

sandpaper

narrower

into

Fig. 10. BRUSH

set, large

as

the compensating brushes.

be held

(c1) and (e).

in

commutator

narrow

mica has been undercut) and then folded back around the

by slowly revolving the

a

set

of brushes.

Cammutator: See

tains

a

poliéhed surface. Ordinarily, the

occasional cleaning,

or

01'], of any description, should 1Z8‘L'€r under

on

the

commutator.

armature

that

with

If

attention, reference should be made

Correcting Troubles,” page 17 and the trouble removed,

other

reasons

In

should‘be given

This roughness

a

piece of sandstone,

the

same

case

radius

than

a

the

rough

commutator

to

avoid undue sparking, heating and

may

be removed by polishing the

from

as

the

commutator.

are

the

energy

motors

sometimes have

SPACING

place nicely

and the

slots between

by hand

the

commutator

a

piece of non~1inting material. l'a,.ielz7ne

good commutation is

brushes.

two

sets

With

connections (:1) and (cl, there

ON BSS

if

MOTORS

it

iscut

to

front

end of the strip inserted

commutator

until

the

paper

is kept clean, and main-

commutator

any

circumstances be used

not

secumd

to

the section

on

of energy brushes,

a

width

bars (wliere

comm

mores

will

only require

“Locating and

commutator.

has become rough, prompt attention

similar

which

a

segmental piece has been

If

sandstone is

commutator

not

easily obtained

slightly

utator,

with

if

due

troubles.

cut

having

are

the

under

this

with

5

(a) Two-Pole (b) Four-Pole (c) Six~Pole

A, A. etc-.

B. B, etc..

The

arrows

sating brush removed.

Fig. 11. NUMBER

In doing this,

any of the parts. Comrnutators

of the lightest

It

will

be iiecessary

is

worn

-reached. Some judgment

a

commutator

After

the

its surface carefully with

The

to

commutator

of

the

mica is projecting

Sx.or'r1:~'o

This operation

the motor, setting

If

milling machine is

49

are

true

neutral positions.

are

false neutral positions.

indicate direction of rotation when brush—yokc is shifted with

AND

care

and judgment

cuts

p0s:~_‘.ible using

to

such

an

undercut

extent

that

will

is suflicicntly

commutator

has been

very

‘

RELATIVE

POSITIONS

must

be exercised

must

be

trued

a

sharp

tool

or

re~slot the mica

OF NEUTRALS

by taking off

and

a

in trucing the surface of the mica is

have

to

be used

worn

to

need re-slotting of the mica.

turned

down,

fine sandpaper

to

it

is necessary

to

remove

should also be carefully examined to see

or

on

UNDER-C("l‘TlNG

can

it

is bridged

Mica

best be done by removing the

up

in

milling machine and

not

available set

over

with

or:

Co.\1MU'rAToRs

armature

copper chips.

between lathe

compen-

so

not

to

strain

a

succession

high cutting speed.

if

the

commutator

determine whether

to

smooth

tool

marks.

that

none

mill

armature

out

from

the mica.

centers

81516-16 Brush 5/nfimg

(no power

as

the

on

the lathe),

‘mica, and placed

of vertical. By holding

back and

are

used by pulling

so

using

forth

the mica

available a hack-saw blade

it

back and

as

not

to

injure the copper segments. This

a

block of wood

use

in

can

to

hold

Mom

Type

555

a

cutting~off tool, ground

tool post in

armature

be

cut

forth

saw

a

stationary and moving carriage

to

the desired depth.

with

the

across

commutator,

in

position while starting.

to

horizontal position instead

If

“set”

ground off

care

can

best be done b_v

After the mica has been cut, fine sandpaper should be used and

a

nice finish given

cleaned

out

mica chips

side

of

segments

to

with

a

knife

that

may have been

in

slotted portion.

commutator

or

some

surface. The slots should then be

sharp tool

left

to

remove

in

slots

or

any

mica clinging

VI. ATTACHMENTS

(A) Sliding Bases

In

mounting sliding bases, the tightening

so as

to

be ‘readily accessible. The base should be level and rigidly

bolted

to

the foundation.

see

that

nuts

not

adjusting

motor

should be

ing

the square washersontop of the base

is, snugly fitting either

should be put

tightened up. The

nut.

When the

holding down bolts should be tightened. Obviously, the base

so

belt,

located

still

providing

the

immediately necessary

_

(B) Belt-tighteners

When the belt~tightcners

as

follows:

151:. Remove

2nd» Replace these bolts with studs furnished

the

In

mounting the

one

side of the

on

the

four

belt

as

to

bolts holding the

may

now

proper

tension is obtained,

provide

room

as

much space

for

slightly loosening

take the belt oft.

are

oidered, they should be mounted

be tightened by

bolts holding the end shield in place,

nut

should be located

motor

on

the

are

or

motor

in

the

groove

the

as

possible for tighten«

it

with

tightoner.

_

3rd. Remove

tightener

ring

Adjustment of the tension of the belt-tightener

P1l5h_ed by loosening the

moving the tightener

it

should be fastened by tightening the four

can

now

be made by adjusting spring and

the

nuts

in

position and replace the

from ends of those studs, place the belt-

four

until

nuts

approximately

nuts.

may

holding the belt-tightener and

in

the

correct

nuts.

position whom

Final

same

width

no

machines

may

being taken

copper

to

the

sliding base,

proper place,

other. The

in

place; but

means

of the

nuts

on

the

if

it

becomes

the hen-

be

accom-

adjustment

be

Brush Shifting Illotor Type

VII.

LOCATING AND CORRECTING TROUBLE

BS5

81516-17’

(A) Mechanical

If

trouble is experienced in the operation of

bolts, etc., should be tightened up. and

tained

that

the

armature

bearings

tion

to

are

in

good condition and

prevent

rotation.

up properly, and all parts

or

(B) Electrical

In

checking

for

is free

The control mechanism

must

move

electrical

motor

to

that

it

revolve;

there is

freely.

troubles,

a

machine,

should be definitely

that

is

to

say,

no

mechanical obstruc-

must

also be lined

it

is usually wise

all

that

nuts,

ascer-

the

to

definitely ascertain:

(a)

That

(b)

the voltage is actually availableatthe motor switch.

That

it

corresponds

to

the

voltage stamped

on

the

name

plate of the machine.

(C)

That

the circuit is of the proper frequency.

((1)

That

(e)

That

the

voltage

also page 10.) Also

to

(f)

be impressed

That

all connections and contacts

circuit between the

the fuses

(g)

That

the

(11)

(C) Motor Fails to

Checking the above points

cause

outside

be spent searching

voltage

of

the motor, where otherwise considerable time might

at

the

motor

If, after following these suggestions,

the brief outline below

(a) No-voltage. Inspect the fuses, switches, and

Test

the

line

with

are

motor

that

motor

correct

Start

for

intact.

terminals

on

the

motor.

are

properly connectecl

(See sketch

transforxner is properly connected

are

properly made in

switch and the

neutral is being used,

motor.

see

compensation is being used,

(See also Low-starting Torque, Page 20)

as

listed

will

frequently locate the

it

inside of the

motor.

Obviously, the actual

terminals should also be Checked.

the

trouble is

will

assist

in

locating the clifliculty:

a

voltmeter

or

lamp. Notify the power plant

on

name

into

page 21.

see

not

all

connections.

for

plate,

circuit.

page 21.

located,

the

if

there is no-voltage.

(b) LOW-Voltage. Determine

power plant,

(c) Excessive overload. Decrease the load

motor.

compared

stitutes

or

too

small service lines.

The

load should always be measured by

with

the

full

load amperes

the

full

normal

electrical input.

(d) The bearing linings stuck

linings,'clcan the shaft

with

Crocus cloth.

with

or

a

voltmeter whether due

or

name

"

to

shaft. Put in

an

plate,

on

the

“frozen

install

a

larger

ammeter, and

as

this

con-

to

new

~—,

~

81516-18 Brush .S'hifting xlfotor Type

(e) The

particles

been displaced

(I) Energy

(g) Wrong brush spacing. Fig.

brush spacing

divided by

that

armature

may

so as

on

the

fill

to

circuit

BSS

number

rubs.

the

air

gap. Make

cut

into

open.

motors.

of poles gives tl1e number of bars between

B58

Put

in

new

bearings,

sure

that

the slots and short

or

ground windings.

Inspect the brush rigging.

ll)

total

shows the

number of

commutator

The

remove

the

correct

iron

dirt

has

relative

bars

energy brushes and between compensating brushes. Between adjacent energy and compensating brushes

It

should be noted

to

the field winding.

that

Fig. 10 does

are

one-half

not

this

number of bars.

show the position relative

(D) Abnormal Heating

When the

by

a

thermometer instead of attempting

perature otherwise. Motors

‘less

on

the

air

(taken

l\i()TE.‘—1t is impossible

with this heating. The

temperatures considerably

(:1) Overload. Reduce

(b) Excessive high-

motor

seems

to

bc overheating take the temperature

to

estimate the rise in

are

rated

to

give

at

full

motor

field iron, above the temperature of the surrounding

at

25 deg. C.).

to

comfortably hold the hand

insulation

over

or

will

not

this

are

load

reached.

or

the

low-voltage. Take

be damaged, however,

install

load 40 deg. C.

a

larger

up

with

on

motor.

the

a

motor

power

tem-

until

plant.

(cl Low-frequency. (Take up

(rl) Incorrect (excessive

brush pressure

(e) High

of Contact of the brush and

Re-slot the mica,

(f) Short

commutator

will

be indicated by excessive line

to

approximately 21/2’ lb.

or

projecting mica. This

see

in

the field winding. Remove all the brushes from the

commutator.

page 15.

and close the main switch. A short

of the shorted part of the winding. This

with

power

plant.)

or

insufiicient) brush pressure. Adjust

per

current

sq. in. of brush

causes

arcing

Turn

down the

in

and by abnormal heating

may

be repaired

at

commutator.

the

field winding

in

area.

the point

the usual

way.

(g) Short

removed from the

it

may

throw

has

known

be found

in

a

tendency

to

easily verified

high and

comes

under each pole.

in

armature.

commutator

that

the

armature

When the above

is made

the line switch and slowly

to

lock under each pole and

be

OK.

it

shows a. short circuit

if

will

anammeter

show

a

is available. The line

decided deflection

test

with

for

a

short

is shorted, with all brushes out,

turn

armature.

in

the

in

the

as

the short-circuited coil

the brushes

the field winding,

If

the

armature

bearing linings

armature.

current

This

will

not

are

be

Brush Shifting Motor Type BSS 8I:5I6'——1.9

or

()1) Using brushes

other

than

those recommended for

use

with

the BSS motor.

(i) Reversed compensation (see Checking CornpenSati0I1, page

21).

(E) High No-load Speed

(:1) The BSS

much higher 11o—load speed

build

or the earlier type of shunt varying speed motor,

no-load speed of

this

motor.

an

open

in

the compensating circuit.

may

result

in

(13)

Incorrect

motor

\\'lll(‘,l1 is

than

one

and one-half times rated speed is allowable for

A speed much greater

a

high no~load speed.

a

series

the

constant

than

this, however, would indicate

A

poor

brush spacing. See (C) point (g) above.

motor

speed

Contact

has inherently

motor

of

similar

so

that

in

this

circuit

a

(F) Low Running Speed

or

(a) Overload. Reduce the load

(b) A

poor

contact

in

the energy

in the speed and in the output of the

(c) See low-starting torque (H) below.

(d)

Incorrect

(G) Sparking

(a)

The

the

correct

brushes

(b) The brushes reversed, i.e., riding

(c)

The

brush

in

firm

(d)

Incorrect

sq. in.

(c) Loose brush-holder. Tighten

brush spacing. 306 (C) P0iT1t (2) 8b0&’—-

at

Commutator

brushes bind in the holder. Clean the brushes;

are

used. Order by Cat. No.

brushes

Contact

worn

with the

so

that

commutator-

brush tension. Re-adjust

or

install

a

larger motor.

circuit

will

motor.

on

the toe only.

the springs

no

to

all

parts and adjust and

cause

a

reduction

f

‘

see

that

part

name

plate.

longer hold

the

about 2%; lb. per

refit

brushcs (see page 14).

(f) Rough commutator, grooved commutator, eccentric

tator

high bars, high mica. These

smoothing

commutator

re—slotr1T11g to pick out any shivers of mica which. would

to lift and spark viciously. (See page 15-‘J

running, tighten shell nut,

is

sating brushes; being careful

running position, and

the

tend

with

sandpaper

will

also have

(g) Loose bars

(h) Open

energy

to

lengthen

circuit

brushes

out

in

the

in

an

throw

assumes

into

flashes

to

turn

can

usually be remedied by either

or

turning and sanding.

be reslotted. Care should be taken after

commutator.

Heat

cause

in

and polish.

armature.

to

see

in

the line switch.

Remove

that

yoke is properly set

If

one

the sparking under

short, light green sparks that do

that

will

follow

the

curvature

commu-

If

badly

worn

the bruslzes

an

oven

or

set of compen-

in

of the

by

the

not

81516-30 Brush Shift-ing Motor Type H55

commutator, the

assumes

long, tor1guc—like flashes which

which tend

has

an

open coil.

to

follow the

armature

Allow

is apparently 0.K.; but,

are

curvature

the

motor

rather

of the commutator, the

to

run

if

vivid

for

approximately

the sparking

and noisy and

armature

one

minute and this open may be vcrilicd by checking for burnt and pitted

adjacent

siitwrs of high

leal1_ one to believe that the

commutator

or

projecting mica dofinot

bars. Care should by taken to make

rouse

armalure

is qfmii.

the above sparking and

sure

that

ii) Incorrect compensation. page 21.

(H) Low-starting Torque

Low-starting torque will result from reversed C(JlIl]JL‘ll53.tl0Il

(corrected

circuit; short

or

wrong

(A) Energy and Compensating Circuits

single-phase and

and

groups,

and the “Compensating Brushes” which

as

explained

in

the field

in

C below)‘

or

armature,

poor

or

open

contact

in

brush position (see B below).

VIII.

GENERAL

The BSS

the

The brushes resting

motor

primarily confists of

an

armature

energy and compensating circuits described below.

one

knownasthe

on

“Energy Brushes" which

or

the

commutator

rotor

INFORMATION

a

field

of

a

series drum wound type,

may

are

connected

or

open

the

licld

or

be divided

are

short-circuitcd,

or

armature,

stator

to

in

into

the

energy

wound

two

com-

pensating windings by the leads “A1" and "A2." The compensating

winding consists of a. tapped

which is connected externally

This

auto-transformer

motor

or

mounted separately,

“Parts

and Accessories," page 5.

The yoke,

snting leads

at

the points beside the holders

are

attached, is plainly stamped

two-pole and %-1800 r.p.m. and below, there is

brushes,

above, there

the brushes

matically

but

on

are

to

each other (but

in

Fig. 10.

the four- and six-pole and 1 h.p.-1800

two

sets of energy brushes. The

On the brush yoke three lines

marked by

arrows

and the

olf

portion of

in

series

may

be either mounted

as

not

center

one

a

series auto-transformer

with

the main field of the

on

outlined

in

“Ai"

the side of the-

the‘ paragraph under

*‘-"

to

which the

and "Ag.” On all

but

one

set: of energy

relative

to

the field-)

are

inscribed,

are

shown diagram-

two

of which

marked by the word “ofi‘,"

motor.

compen-

r.p.m.

and

location of

are

see

Fig. 4.

On the bearing housing there is

cating"

yoke

reversal of the

or

“Refercnce" mark and

are

changed in relation

motor

are

obtainml.

a

chiseled mark called the

as

the position of the marks

to

this mark, the various speeds and

"

on

Indi-

the

With

the

"off"

markinline

motor

in line

is in the

with

standstill

position.

the indicating mark,

for rotation in direction of corresponding

(B) Locating of Reference

lst.

Disconnect

2nd. See

that

motor

all

brushes

3rd. Raise all compensating brushes

contact

of Fig. 10 there

the lead A1

taken

yoke

housing

in

and

armature

to

until

current

on

the

commutator.

are

no

separate compensating brushes.

will

have

that

it

is replaced properly later.

to

4th. Move the yoke

comes

opposite the supposedly

or

if

new

reference mark is being found,

any convenient position

“

A2."

5th.

Throw

in the main line switch MUMENTARILY.

rotates, gradually shift the yoke in the direction opposite

rotation.

the

(Allow the

:1 point is reached where the

is

thrown

motor

on

inonwntarily.) Temporarily mark this point

housing opposite either

be disconnected from

so

as

6th. VVhile holding the yoke

the line switch

from

this

in

the direction of shift, the

the

armature

point.

for

El. few seconds and quickly shift the yoke slightly

If

the

armature

slowly

starts

shift, false neutral has been found. The

"

00 degrees from this point in

four-pole machine, 30 degrees in

From

this

ligurc

it

will

also be noted

true

neutral

readily stamped

connection of leads

7111. Remove previous marks and chisel the

'

may

serve

points.

as

a

The

one

on

the housing, and which

“AN

and “A,,"

permanent; reference point.

with

the “Indicating" mark,

With

either of the

the

motor

is in

full

speed posi

Mark

arrows,

on

Housing (Finding Neutral) _:‘

see

Fig. 10.

from any mechanical load.

lit

commutator

If

the

motor

that

one

correct

permitted by

to

come

to

armature

linc

marked with

in

this

starts

correct

to

neutral has been found, but

rcvolvu

in

a

two-pole machine, 45 degreesin :1

it

six-polo machine. See Fig. 11.

perfectly.

so

that

they will

is connected

the

stud,

of the running marks

reference mark

the

yoke

the

length of leads “.—"\,"

rest and repeat this operation

definitely “lot-lcs" when

an

arrow

new

found position,

with

a

very

strong torque

the opposite direction from

true

neutral xvii be found

that

catch

motor

where tho reference mark may be

will

not

will

naturally be selected.

interfere with the

new

outer

not

like

d and L‘

In

that

cure

on

may

be

If

on

the yoke.’

has several

mark

that

I

_

I

_

make

Cfl$L‘

being

the

left

the

do

most

';

it

ii

‘I

if

it

(C) Checking Compensation

1st. (\Vith the brush yoke

arrows,

housing.) See

1'E1)l-'1Ce<l'J

opposite the correct. reference mark chiseled

that

are

making firm,

all

energy

even

on

neutral, i.e.,

the

lines marked with

on

the bearing

and coxnpensuting brushes (being

contact

with

commutator. (‘lose the

81516-22 Brush Shifting Motor Type BSS

line switch and

pensation

indicated by the

is

in

the opposite direction, interchange leads

to

the

compensating brushes,

housing opposite

so

that

the

mark

on

NOTE.—Incorrect compensation is indicated by

I1u—lua.d cLu‘1‘L'11t.

All

note

will

be

arrow

first

arrow

the housing.

machines

the direction

correct

line

the

other

line

IX.

are

provided

of

rotation of the

if

the a1‘ma.ture

on

arrow

will

the yoke

or

now

chisel

lines

come

nearest

on

SUPPLIHPARTS

with

Part Name Plate, which gives the

armature.

rotates

in the direction

the neutral.

“

A1" and “A2" running

a

new

reference

the yoke and

mark

shift

opposite the second reference

a

Cat. No. uf brushes, bearing linings, and also the held and

specification numbers.

If

rotation

on

the yoke

very

armature

Com-

the

high

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General Electric General Electric Co. Brush Shifting Motor Instruction Book Instruction Guides

Specifications and Main Features

Frequently Asked Questions

User Manual