Ge Akr-30s User manual

Installation and

Maintenance

Instructions

Courtesy of NationalSwitchgear.com

Power

Circuit

Breakers

CONTENTS

Description

P~ge

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Reciii~h1~~1g~

and Storage

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SECTION 2

~

lnstalhi·Uon

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

3

Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

........

3

Stationary Breakers (God9

S)

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

3

Draw Out Breakers (Code

D)

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

3

Breaker Insertion

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

.4

Breaker Removal

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

.4

SECTION 3 -

Operation

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

5

Electrical Operation

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

5

Manual Operation

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

6

Connections

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

6

Control Connections

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

6

SECTION 4 -

Maintenance

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

8

Inspection

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

8

Separation

of

Front and Back Frame

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

8

Lubrication

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

8

Troubleshooting

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

9

SECTION 5 -

Basic

Breaker

Components

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

10

Disconnects

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

10

Primary Disconnects

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

1O

Secondary Disconnects

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

1O

Replacement of Movable Secondary

Disconnects

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

10

Arc Quencher

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

11

Replacement

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

11

BreakerContactStructure

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

11

Contact Adjustments

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

11

Contact Replacement

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

12

General Preparation

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

12

Removal

of

Movable Contacts

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

12

Removal of StationaryContacts

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

12

Replacement of StationaryContacts

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

12

Replacement

of

Movable Contacts

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

14

Contact Springs

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

14

Mechanism

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

14

Adjustment

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

15

Latch Adjustment

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

16

Mechanism Replacement

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

16

Removal of Front Escutcheon of

Manual Breakers

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

16

Auxiliary Switch

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

16

Replacement

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

17

2 ©

1984

General Electric Company

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SECT;ON 6

~-

Electrica.1

Replacernent

Ccm·troi

Components

..

1?

Glo5ing Solenoid

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

11

Coil Fl:aplacement . . . . . . . . . . . . . .

..

. . . .i 7

"K"Reiay

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

17

"E"

Relay

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

i 7

Reµiacernerri

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

·1

7

Cut-off Switch

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

17

Replacement -

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

18

Closing Switch

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

18

Replacement

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

18

ShuntTrip Device

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

19

Replacement

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

20

Adjustment

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

20

SECTION 7 -

Protective

Devices

.....

21

Undervoltage Device

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

21

Adjustment

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

21

Static Time-Delay Undervoltage

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

22

Electric Lockout Device

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

22

Bell Alarm Switch and/or Lockout Attachments

.......

23

Operation

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

23

Open Fuse Lockout Device (OFLO)

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

24

Operation

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

24

Adjustments

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

24

Replacement

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

24

Draw

Out

Interlocks

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

25

SECTION 8 - MicroVersaTrip®

Trip

Device

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

26

Programmer Unit

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

26

Fault Trip Indicators

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

27

Remote Fault Indication

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

27

MicroVersaTrip Installation

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

28

Current Sensors

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

28

Replacement

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

28

Flux Shift Trip Device

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

28

Troubleshooting

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

29

Resistance Values

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

29

False Tripping -Breakers Equipped with

Ground Fault

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

30

SECTION 9 -

Electrical

Characteristics

..........

35

SECTION 10-

Renewal

Parts

.........

38

JI·

I

i

!

NOTE: Before installing

or

operating these circuit

breakers, carefullyread Sections

1,

2,

and

3.

SECT~ON

1 -

Receh1ing~

Handling~

and

Storage

Upon

H:-Geipt

uf

a circuit brei:iker, immediatelyexamine for

any

dwnage

01·

loss susiained

in

shipment. Hinjury, loss, or

rough handling is evident,

rne

n damage claim at once with the

transportation company and notity tho nearest General Electric

Sales Office.

Unpack

the circuit breaker as soon as possible after it has

been received. Exercise care in unpacking to avoid

damage

to

the breaker parts. Be sure that no loose

pa~t_s

are missing

or

left

SECTION

2 -

Installation

Location

In choosing a location forthe installation

of

these breakers

there are two factors to be considered. The first isthe location's

environmental impact on the breaker. Betterperformance and

longer life can be expected if the area is clean, dry, dust-free,

and well ventilated.

The

second is convenience for operation

and maintenance. The breaker should be easily accessible to

the operator and there should besufficient space available for

maintenance work.

Stationary

Breaker$

(Code

S)

These breakers are designed for mounting in a switchboard

or

enclosure designed and constructed byothers. Mounting

consists

of

bolting the breaker frame to a supporting structure

within the switchboard

or

enclosure, connecting the power

buses

or

cables, and making any necessarycontrol

connections. The front cover of the breaker enclosure may be a

hinged dooror a plate bolted to the panel, including a cutout

opening through which

the

front escutcheon

of

the breaker can

protrude.

The surface on which the breaker is mounted must be flat to

avoid internal distortion

of

the breaker. The supporting structure

must be rigid enough to avoid any possibility

of

the breaker

studs supporting the weight

of

the breaker. Minimum cutout

dimensions as given by the appropriate outline drawing must be

maintained to provide adequate electrical clearance.

Connecting bus and cables

must

be rigidly supported to prevent

unduestress on the breaker terminals.

ir1

!he

µ<:1c~.i:l.ying

material. Biow

cut

any

din

or

ioosa

particies

of

packaging materiai remaininq on or in

Hm

breakec

ii

Hie ci1cui!

breaker

is nut to be placed in service at once,

store it in a clean,

dry

location in an upright position.

Support

it

to prevent bendiny of the studs or damage to any

of

the breaker

parts. Do not coverthe-breaker with packing

or

other material

which absorbs moisture that maycause corrosion

of

breaker

parts. A covering of kraft or othernon-absorbent paper will

prevent dustfrom settling on the breaker.

The outline drawings in Table 1 provide basic dimensional

information for designing the panel or enclosure mounting.

Table 1 -

Outline

Drawings

Breaker Type

AKR-30S Draw Out

AKRU-30S Draw Out

AKR-30S Stationary

Outline

Dwg

No.

139C5317

139C5318

139C5319

Draw

Out

Breakers

-

Code

D

AKD-8

Switchgear

and

Substructure

The

draw

out breaker is supported bytwo protruding pins

on each side of its frame; these pins engage slots in telescoping

slide rails (tracks) mounted to each sidewall

of

the switchgear.

All

draw

out breakers are equipped with a deep escutcheon

with side labels showing these discrete positions:

CONNECTED-This is the breaker's

"in-service"

position.

It is fully inserted in its compartment; the primaryand secondary

disconnectcontacts are fully engaged. The breaker

must

be

tripped before it can be racked intoor out of this position.

TEST -In this position the primary contacts are

disconnected but secondary contacts remain engaged. This

allows complete breaker operation without energizing

the

primary circuit.

3

Courtesy of NationalSwitchgear.com

wer

S

CTION

Breaker Insertion

1. Prior to lifting a breakerto its intended

compartment

location, observe

the

following precautions:

PRECAUTIONS

a. Check the

compartment

to ensure

that

itis free

of

foreign objects.

b. Verify

that

the

breaker

is the

correct

type for

that

compartment.

c.

Ensure that the breakeris OPEN.

d.

Apply

a thin, fresh

coat

of

050HD38

lubricantto

the breaker's

primary

disconnects.

e.

Ensure

that

the racking

cams

on the

breaker

are

correctly

positioned

for initial

engagement

with the

pins

in the compartment.

To

do

this, insert the

racking handle

and

rotate

it

fully counter-

clockwise.

the lining wirn

ti

1e

0ievatlon

o'i

lh0

dacks.

lovvor and guide the br0akflr sn

th;;r~

H;r!

1~.if'~dki8r

inlo

the in the

ths

,;;tops.

This

isl.he rn:3COi\l!\IECT

an·

nd

arB

io

cI1gage the nxed

the r:ompartment, ready to begin the racking motion.

5.

Push

in

tho

inner

raHs

and

closo

tho

compartmont

door.

Insert the

racking

handle into the racking screw opening in the

compartment

door. By clockwise rotation of the handle, move

the breakerthrough the TEST position into

the

CONNECTED

posttion;

the

latter is indicated when

the

jackscrew

comes

to a

solid stop.

BreakerRemoval

1.

With the

door

closed and latched, trip the breaker.

2.

Insert

the

racking handle and rotate it counterclockwise

until the breakertravels from

CONNECTED

through

TEST

to the

DISCONNECTED position, as indicated by the

jackscrew

coming

to a solid stop. This operation should be performed with

the doorclosed.

3.

Open the

compartment

door and pull inner rails

to

the

extended position. Pull the breaker out to

the

travel

limit-this

is

the WITHDRAWN position.

4.

Attach

the

lifting wire and hoist the breaker until its

mounting pins clear the

track

slots.

5.

Swing the breaker forward until the primary disconnects

clear the

compartment

and lower

the

breaker onto a flat surface

free of protrusions that could damage the breaker's internal

parts.

SECTION

3

~

Operation

mov£mcn1 of

The

solenoid

~rma1ure,

vvhich

Initiates the

1·r~e·~:

·i··1

a~-;

ic~~

l

.p~ther

;:~

rernote

s~M~tch

or

front escutcheon

if

the break.er is so

~D

the of

U1G

of

the"}("

1elay

through

tile

normallyclosed

co;-1tacls

of

cutoff

switch G and

the

normallyclosed contacts of the

"E"

relay.

When

the

"K"

relay or

contactor

is energized,

it

closes its

contacts.

One

of these

("

K"

1-2) seals in the

"K"

coil. The other

three sets of contacts,

which

are arranged inseries, activate the

closing solenoid.

The

breaker control

scheme

has an anti-pump feature

which allows

only

one closure of

the

breakerfor a single

operation

of

the

closing switch no

matter

how

long

the

switch

may

be held closed.

This

prevents

the

repeated operations that

D K M

A7

A4

A5

('0-~---

_@_Q~~s~

J~.Q~~SE

-)

( - )

(-)

lh8

·'r'." ff',;8.y, IN!ih

jf.H

UJ)Off

'teA.ture.

"fhe rnechanical

actic~n

'::;n;:::Jl7'.FJS

th0

sv

•.

dtch,

v,,.ilth

as

Electrically

operat~d

breakers may also be closed by means

of

the

maintenance handle which is furnished with

the

breaker.

This is a separate tool and is simply a lever which permits an

operator to push upwards on the closing solenoid armature. Two

small hooks on one end of maintenance handle are

engaged

in

slots (12), Fig. 7, located in the lower portion of the front

escutcheon (10). Rotation of the long end of

the

handle

downwards forces the shorter end of the handle upwards

against the bottom of the solenoid armature, and closes

the

breaker.

STANDARD

UST

OF

ABBREVIATIONS

(SOME DEVICES MAY NOT BE INCLUDED IN DIAGRAMS)

A

-SECONDARY

DISCONNECT LOCATED TOP LEFT,

FRONT VIEW

B

-SECONDARY

DISCONNECT LOCATED TOP CEN-

TER, FRONT VIEW

C

-SECONDARY

DISCONNECT LOCATED TOP RIGHT,

FRONT VIEW

D

-CLOSING

SOLENOID

E

-ANTI-PUMP

RELAY

G

-CUT-OFF

SWITCH

K

-CLOSING

RELAY

L

-(AUXILIARY

SWITCH)

"A"

CONTACTS TAKE POSI-

TION

OF

BREAKER CONTACTS,

"B"

CONTACTS

OPPOSITE TO BREAKER CONTACTS

M

-SHUNT

TRIP DEVICE

P

-PUSH

BUTION

CLOSING SWITCH ON BREAKER

Fig.

1.

Typical wiring diagram -electric operation

4 5

Courtesy of NationalSwitchgear.com

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ot

~h:r:rn

8.t!ec!

~a~ci

..

:1

1

CDl

lho

in-cL;!;0nLsrn.

T~-ie

latch

l:S

shail

1i11hich

nms

ihmugh

lh8

breaker

from left lo \Nhenever the shaft is rotated in a

counterGiockwise direci.ion

iooking

ironi

ihe

right. the latch is

dispiaced.

The

tripping

devices

are

al!

equipped

with

strikers or

trip

arms

which

act

against

trip

paddles

rigidly fastened

to

the

trip shaft,

causing

it

to

rotate on its

bearings

in a

direction

to

trip

the

breaker.

The

shunt

trip

device

has a set

of

auxiliary

switch

"a"

contacts

in its

curcuit.

(An

"a"

contact

is open

when

the

breaker

contacts

are open.)

This

prevents

its operation

unless

the

breaker

is closed.

The

undervoltage

device

coil is

normally

continually

energized.

When

the

control

voltage

is low or non-existent, as

when

the

breaker

has

been

drawn

out

for

inspection

or

maintenance,

the

breaker

is

rendered

trip-free

by

the

undervoltage

device. If it is

desired

to

close

the

breaker,

the

device

armature

must

be

tied

down

or

blocked

closed

against

the

magnet.

The

open

fuse

lockout

device

is

used

on all

AKAU

(fused)

breakers.

The

purpose

of

this

device

is

to

trip

the

breaker

upon

the

blowing

of

any

one

of

the

breaker

fuses.

Manual Operation

The

manually

operated

breaker

is closed

by

first rotating

the

handle

in a

counterclockwise

direction

through

90

degrees,

then

rotating

it

clockwise

back

to

its

normal

vertical position.

The

counterclockwise

stroke

resets

the

mechanism,

readying it for

the

clockwise

closing

stroke.

The

breaker

may

be

tripped

manually

by

pushing

the

manual

trip

button.

This

action

pushes

a rod

against

a trip

paddle

of

the

trip shaft, rotating it,

and

causing

the

mechanism

trip latch

to

be

displaced.

This allows

the

mechanism

linkage

to

collapse

through

the

action

of

the

mechanism

operating

springs.

6

CAUTION:

IF

THE

BREAKER

IS TRIPPED

MANUALLY

WHILE THE OPERATING

HANDLE

IS IN

THE RESETPOSITION,

THE

HANDLE

SHOULD

BE

LOWERED

BY

THE

RIGHT

HAND

WHILE

OPERATING THE

TRIP

BUTTON WITH THE

LEFT

HAND.

111

aii electrical connpction2.,

n1ur,t When

The

equipment

connections

to

a

breaker's

accessories

and

control

devices

must

be in

accordance

with

the

specific

wiring

diagram

applicable

to

that

breaker.

Gontrol

connections

to

stationary

breakers

are

made

to

a

terminal

board

mounted

on

the

breaker.

Figure

2

shows

typical

closing and

tripping

connections. If

equipped

with

an

overcurrent

trip

device

which

includes

a

ground

fault

element

for

use

on

4-wire circuits, an

additional

terminal

board is

provided

on

the

breaker

for

connecting

to

the

equipment-mounted

neutral

sensor (physically

located

in

the

neutral

conductor).

On

draw

out

breakers

the

control

circuits

terminate

in

the

breaker

compartment

on

the

stationary

portion

of

separable

secondary

disconnects.

See Fig. 3.

CUSTOMER

CONNECTIONS

CLOSE

CLOSING{

SOURCE~--

FUSE

TRIP

{---ITJ}----1

SOURCE

TERMINAL

BOARD

MOUNTED

ON

RIGHT

SIDE

OF

BREAKER

-0

3

4

5 0

6 0

7 0

UV TRIP f

-4-----

8 0

SOURCE t

..,._._

-0

9 0

0 1 0 0

·--------------------------

F"

.

1g.

Control connections to stationary

breakers

-·

front view

fRIP

suur:cE

F)

0

.ii."

~

-

perauo

TRiP

CLOSE

C:~i

..

~'JSE

SOLENOID

((!

<l>i!!l--{r_,,l

1

1---~

SOURCE

A

/\

/\/\

/\

7654321

B

/\

/\/\

/\

/\/\/\

7654321

c

STATIONARY

SECONDARY

DISCONNECT

BLOCKS

L-

LOCATED

AT

TOP

OF

COMPARTMENT

-

POSITIONS B

AND

C FURNISHED

ONLY

WHEN

REQUIRED I

Fig.

3.

Control connections to draw

out

breakers -front view

of

breaker compartment

..

,

'

Courtesy of NationalSwitchgear.com

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BESU',f.?E

DISCONNECTED.

Periodic inspection of

the

circuit breaker is recommended

at least once a year. More frequent inspections are recom-

mended if severe load conditions, dust, moisture,

or

other

unfavorable conditions exist.

If

the

breaker remains open or closed for a long period of

time, it is recommended that arrangements be

made

to open

and close it several times in succession, preferably under load.

At all times it is

important

not

to

permit

pencil lines, paint, oil

or other foreign materials to remain on the insulating surfaces of

the breaker as they

may

cause low resistance between points of

different potential and result in eventual electrical breakdown.

Always inspect the breaker after a short circuit has been

interrupted.

At the time of periodic inspection,

the

following checks

should be made after

the

breaker has been de-energized.

1. Manuallyoperate the breaker several

times

checking for

obstructions or excessive friction.

2.

Electrically operate the breaker several times (if breaker

has electrical control) to ascertain

whether

the electrical

attachments are functioning properly.

3.

Remove and inspect the arc quencher. Breakage of parts

or extensive burning will indicate need for replacement.

4.

Check

contact

condition and depression.

5.

Check

latch engagement.

6.

Check

operation of tripping devices, including

overcurrent trip devices, making sure all have positive tripping

action (discernible

movement

in tripping direction beyond point

of tripping).

(For detailed information on breaker features listed, refer to

appropriate sections ofthese instructions.)

Separation

of

Front and Back Frames

{See Fig.

5)

Many maintenar)ce operations will either require or be

greatly facilitated by separating the front frame and mechanism

ofthe breaker from

the

back frame or base, which consists of the

current carrying parts and

their

supporting structure. The

procedure for this operation is as follows:

8

i.

Herfawe

U1e

arc

q1.1ene'•~·s

Section

3.

If the breakAr

1s

a

draw

out type, wi•h

secondary

disconnects, remove the seconaary

disconnect

supporting

bracket from the breaker back frame. Also remove any wiring

bundle retainers that may be attached to

the

back

frame.

.4. Remove the rear elastic stop

nut

from each of two studs

(3), which tie

the

upper ends of the mechanism

frame

to

the

back

frame of the breaker. Remove two side

support

standoff

bolts

attached to back frame.

5.

Remove two bolts (7/16" Hex) supporting

the

programmer

mounting

bracket. Disconnect

programmer

harness at current sensor terminal boards. Note polarity and tap

setting (where applicable).

6.

Remove the two elastic stop nuts (9/16" Hex) which

fasten the wraparound portion ofthe front frame to

the

back

frame.

One

of these is located on each side of the breaker, about

2/3 of the distance down from

the top

edge of

the

back frame.

7.

The two frames are now disconnected.

CAUTION: CARE

SHOULD

BE

EXERCISED IN

SEPARATING THEM

TO

AVOID

DAMAGE

TO

THE

TRIP

SHAFT

ARMS

AND

PADDLES.

While the back frame is held steady, lift the front frame and

mechanism

up

and out.

Reassembly of the two breaker halves is

accomplished

by

following the procedure outlined in reverse order.

lubrication

In

general, the circuit breaker requires very little lubrication.

Bearing points and sliding surfaces should be lubricated

very

lightly at the regular inspection periods with a thin film of GE

lubricant D50HD38 (Mobil 28). Hardened grease and

dirt

should

be removed from latch and bearing surfaces

by

the use of a safe

cleaning solvent such as kerosene. Latch surfaces should be left

clean and dry and not be lubricated.

NOTE, A//

exce;;;lub,lcant

;;;;;;,Id

be

;:;;;;mved

w:=J

clean cloth

in

orderto avoid

any.

accumulation

of

dirt

or dust.

"-'~~~~·~~~~~~~~~~~-~

.

At each maintenance period, all silver to silver friction

points, such as primary disconnects, should be cleaned and

given a fresh coat oi GE lubricant D50HD38..

SECTIO

Failure to Trip

False Tripping

Failure to Close and Latch

Hj

i:J

;,:i.nv

tlh"'1S,

-;_~-,~:-:-;-v

.:::v;·~·1(~\~-~·{n;:,

SJ:€:;;

~)J"Sel·-·vtH.t

iheir

causie should

~}~

<.~H~-·~n·-:rd~"·i~.,.i

~~"•,d

tJ·e~

nq.;-:r"~?-S'.::::3XV

r~nner:;~ive

actle:l

stHJtikj

be

·-------

~

--------~---

Car.tacts greasy or coaled

with

darktilm. i Clean

contact~~.

1---------------------__j_

Contacts badly burned or p!ttsd. · Rop!nco

co:itZlcts.

Current carrying surfaces dirty. Clean surfaces of current carrying parts.

t------------~~~-----+--~--------~~~~--~-

Corrosive atmosphere.

Insufficient bus or cable capacity.

Bolts and nuts at terminal connections not tight.

Re

Io

cate or provide adequate enclosure.

Replace corroded parts.

Increase capacity of bus or cable.

Tighten, but do not exceed elastic limit

of

bolts

or fittings.

Current in excess

of

breaker rating. Check breaker application or

modify

circuit

by

decreasing load.

Excessive ambient temperature. Provide adequate ventilation.

-------

Travel of tripping device does not provide Re-adjust or replace tripping device and

check

positive release of tripping latch. mechanism latch adjustment.

Worn

or

damaged trip unit parts. Replace trip unit.

·~-~~---------t------------~------

Loose or disconnected

programmer

plug. Check disconnect plug fit and terminals.

Loose

or

broken current sensor harness Tighten or replace harness.

connections.

Overcurrent trip device pick-up too low. Check application of overcurrent trip device.

Overcurrent trip device time setting too short. Check application of overcurrent trip device.

t----------------~----+-

1nsufficient clearance to trip paddles. Re-adjust clearances and

check

latch

adjustment.

Tap

setting on current sensors incorrectly set. Check application.

t---~-~--------~~~---+-

ExternaI ground sensor coil improperly Check polarity and connections.

Check

connected. continuity of conductors connecting the neutral

sensor.

Binding in attachments preventing resetting of

latch.

Latch out of adjustment.

Re-align and adjust attachments.

Adjust latch.

t------------------~----·

Latch return spring too

weal<

or broken. Replace spring.

·~------------~--

Hardened or

gummy

lubricant. Clean bearing and latch surfaces.

·~------f-------

C

Io

sing solenoid burned out. Replace solenoid coil.

-------

·-----

Solenoid control device not functioning Re-adjust or replace device; verify minimurn

properly. closed circuit voltage (see Table 5).

~~-------------------

9

Courtesy of NationalSwitchgear.com

Power c t ers

S

CTION

5 Basic Breaker

Components

of

the and !he

~:ldd.

VVhen

\he stationary stud

ot

the

enclosure,

the

disconnect

fingers exert

a set amount

01

force Hie stud tho

ac!ion

ot

the

compression

springs. Retainers and spacers hold

the

contact

fingers in

correct

alignment

for

engagement

with the

stud.

The

amount

of

force which the

fingers

exert

against the

stud is

determined

by

the

degree

to

which

the

springs

are

compressed

by

the

bolt and

nut

which

hold the assembly

together. If, for any reason,

the

disconnects

must

be taken apart,

the

position

of

the

nut

on

the

bolt

should

be carefully noted, so

that in reassemblying,

the

original

amount

of

compression

will

be restored

by

replacing

the

nut

at its

former

position on the bolt.

The

nominal

compressed

spring

height

is 25/32 inch.

Secondary Disconnect

(See Fig. 4)

The

secondary

disconnects

serve as connections between

breaker control

circuit

elements

and external control circuits.

They

are used

only

on

draw

out

type breakers. Aterminal board

serves the same

purpose

on

stationary

mounted

and general

Repiacerneni

oi

Movabie

Secondary

Disconnects

To

replace movable

secondary

disconnects, proceed as

follows:

1. Unfasten

disconnect

body from

breaker

back

frame.

2.

Open

tabs which hold wires on

inner

side.

3. Pull

contact

tip loose from hollow tube.

4. Remove contact

tip

by

cutting

wire at its base.

5. Push wire through hollow

tube

of

new

disconnect

assembly.

6. Strip insulation off end

of

wire to

about

1/4 inch from end.

7. Place

new

contact

tip

on end of wire and crimp.

8. Pull wire through hollow

tube

until

contact

tip

fits

snugly

against end

of

hollow tube.

1.

Contact

tip

2.

Wire

3.

Hollow

tube

4.

Tabs

5.

Fiber

spacer

Fig.

4.

Movable secondary disconnects

iO

SECTION

5 - Basic Breaker C

mponents

9. Crirnp

tub

on ·OlraH sido

tll

-~.

V\lhen all

V1J1res

ha\,.~~

been

~nech:1d

1

nf

thn

a.ssombjy

to

ths-

hr60dt::~r

h0c~(

fruri0.

The arc

quer.cher

is an integral riveted

assembly

cmnposod

of

two

ceramic

side plates, a series

of

steel plates, and a muffler.

The

assembly

is

covered

by a wrap-around of insulating material

which

inhibits

any

sidewise

emission

of

gases.

The

side

barriers

on the

arc

quencher

contain flares

which

rl}Ust overlap the

contact

barriers.

The

steel plates are held

in

position and

supported

by the

ceramic

sides which are grooved

vertically

to

provide

recesses for the vertical edges

of

the steel plates.

The

bottom edges

of

the latter form an inverted

"V"

along the path

of

the arc

that

may

be

drawn

between

the

breaker

contacts

during

interruption.

The

steel plates have the effect of breaking

up

the

arc, and cooling it and

the

gases that result from interruption.

The

entire

assembly

provides

a

"chimney"

effect

which

directs

the hot, ionized gases

upwards

through

the steel plates and

mufflers

and allows

their

safe and controlled escape at a cooler

temperature.

The

muffler

at

the top

of

the

assembly

is a

serpentine

shaped

strip

of

perforated copper-plated steel. It is

important

that the

perforations

of

the

muffler be

kept

open,

since

its

closure

could tend to

prevent

the escape

of

the gases along

the desired path.

CAUTION: AT THE

REGULAR

MAINTENANCE

INSPECTION,

CHECK

THE CONDITION OF THE

MUFFLER

AND

OPEN

ANY

OF

THE PERFORATIONS

THAT

APPEAR

TO

BE

CLOGGED.

If any very

extensive

burning

or

corrosion is noted in

the

arc

quencher, it should be replaced.

Replacement

is also indicated if

any breaks

or

cracks are noted in the

ceramic

material.

Replacement

To

remove the arc quencher, lift

the

assembly

up

and out,

after the steel retainer across the front

of

the arc

quenchers

has

been removed.

The

upper

edge of the steel arc runner, fastened

to the

back

plate

ot

the

breaker, fits into a recess in the

back

portion of

the

arc

quencher

which locates it in its

proper

position

upon replacement.

Make

sure

the steel retainer is replaced and

fastened

firmly

to its

mounting

studs after the arc

quenchers

have been replaced.

Ensure

the arc

quencher

is fully seated on

the arc

runner

prior

to fastening retainer clamp.

nn

uppor

on

inn~':w

end

on

ihe

fonNard

or

-fror:t

side

of

th(; bre3.kor ba.se.

Each

of

lhe::;e

convex

pivot surfaces mates with

the

concave

pivot

surface on the rear

side

of

the

stationary contacts.

Each

of

the

stationary contacts pivot in a horizontal plane.

The

end

of

the

contact

opposite to the contact

tip

end is

formed

into

the

shape

of

a small hook. Atension spring

engages

this

hook

and

provides the necessary contact pressure at

the

pivot and also

at

the point

of

contact with the

movable

contact

arm.

When

the

breaker

contacts open, a projection on the

contact

tip

end

of

the

stationary contact bears against a stop pin restricting

the

movement

of

the stationary contact. This

arrangement

results in

a continual high force existing between

the

mating pivot

surfaces.

The movable contact arms pivot in a vertical plane, each

making

contact with three stationary contacts, and

thus

providing six low-resistance parallel paths

of

current

for each

breaker pole. The movable contacts rotate

about

a silver-plated

copper

pin which is held by a pivot support. Each

side

of

the

pivot

support

bears against the lower,

outer

surface

of

the

contact arm and supplies a second low-resistance path

through

the

pivot. U-shaped spring clips

made

of

silver-plated

conducting material provide an additional

current

path and

protect the other contact surfaces

of

the

pivot

against pitting

when in motion. These clips also

contribute

to

the force

tending

to increase the contact pressure between the lower

ends

of

the

movable contacts and the pivot support.

Contact Adjustments

The

only

adjustment

to be

made

on

the

breaker

contacts

is

that

of

contact depression. This is the

distance

the

movable

and

stationary contacts move while

they

are

touching

one

another'in

the process

of

breaker closing.

The

amount

of

contact

depression can be measured by

comparing

the position

of

the

front surface

of

the stationary contact

when

the

breaker

is open

to its position when the breaker is closed.

The

most

convenient

stationary part of the breaker to use as a reference

point

is

the

steel arc runner above and behind the

stationary

contacts.

The

proper contact depression is 1/8 ± 1/32 inch measured

at the end

of

the contact tip.

The

means of adjusting contact depression is provided by

an eccentric pin which passes through the center

of

the movable

contact assembly. Each end

of

this pin has a free, projecting,

hexagon-shaped section which is easily accessible to a small,

open-end, 1/4-inch wrench. Two cantilever springs, which

bear

on each end against a portion of the hexagon section

of

the pin,

11

Courtesy of NationalSwitchgear.com

t ers

~

-~

CTI

N 5 Basi B

ker

IOCK

the

and

provide

index

stops

for

the

flnd or

prcccdun=)

:s

as

faiiov.:s:

numbers on the

ngll!

end of each pin

o.s

raterence, set

each in the

samR

!n

many cases,

t!1e

number?

is a

good

beginning

point.

Hie

conesponding pin

number

is Hie

one

clearly

viewed

from

the

front

(not

the

top)

of

the

breaker.

Note

that

the

numbers

on

the

are

not

in

numerical

sequence

as

the

pin is rotated.

2.

By

measurement,

establish

the

position

of

the

front

surfaces

of

the

stationary

contacts

with

reference

to

the steel arc

runners

above

and

behind

the

contacts.

3.

Close

the

breaker

and

establish

the

amount

of

depression

by

again

measuring

as in

Step

2 and

comparing

the

measurements

with

those

taken with

the

breaker

open.

4. If

any

set

of

contacts

leads

or

lags

the

others, open

the

breaker

and

advance

or

retard

the

adjusting

to

the

or

lower

number.

Moving

the

adjusting

to

a

higher

number

will

increase

the

contact

depression;

moving

to

a lower

number

will

decrease

the

contact

depression.

NOTE:

No

attemptshouldbe made to move the

adjustingpin when the breakeris closed. Besides the

fact that

it

willbe more difficult to

do,

the additional

force required to move the pin will tend to roundoff

the flats

of

the hexsection

of

the pin.

5.

Be

sure

not

to

exceed

the

maximum

depression

recommended.

If

higher

adjustment

numbers

are used, it is

possible

that

the

stationary

contacts

will bottom,

producing

excessive

back

force

on

the

breaker

closing

mechanism

so

that

the

toggle

link

(4), Fig. 7, will not pass center. As a result,

the

breaker

will

not

complete

its

stroke

and

inadequate

pressure

and

depression

will 'result, followed

by

burn-up

of

contacts

from

load current.

Contact Replacement

Under

normal

situations,

the

replacement

of

all

the

movable

and

stationary

contacts

should

be

performed

at

the

same

time.

This

will be

the

case

where

long

use

of

the

breaker

in service

has resulted in

extensive

wear

or

erosion

of

the

silver

alloy

contact

tips.

General Preparation

1.

Remove

arc

quencher

retaimir

(1), Fig. 7,

by

loosening

the two

captured

nuts

with

a

7/i

6-·inch

wrench.

12

n

t-

"'~

1. Separate th0 front

a.nd

bac:( fran1es as

m;rlinAd m Ser;tion 4.

2.

Remove

two

hole

plugs

(3), Fig. 6,

from

barrier

(2), Fig.

5.

Remove

the

U-shaped insulation

barrier

(6)

from

each

pole

by

lifting it

and

disengaging

the

rivet

heads

through

the

keyholed

slots in the insulation.

3.

Thread

a #8-32

screw

lightly

into

pivot

pin (12) on

the

right

pole.

4. With a

pair

of

long-nosed pliers,

unhook

safety-pin-type

spring

clip

(10) and

extract

pin (12) and

remove

spring

clip

(i 0).

5.

Grasp

movable

contact

assembly

and

remove

it

from

its

seat

on

the

cross

bar.

6.

Repeat

procedures

1, 2,

and

3 on

the

left pole.

7.

Move

the

cross

bar

downward

to

disengage

it

from

the

contact

wipe

adjusting

pin (i 8) on

the

center

pole; then,

move

the

cross

bar

toward

the

front

of

the

breaker.

8.

Remove

the

split

pin retaining

the

center

pole

pivot

pin.

9.

Remove

the pivot pin

and

movable

contact

assembly.

Removal

of

Stationary Contacts (1), Fig. 6

or

(24), Fig. 5

i.

Slip

the

blade

of

a

heavy

screw

driver

between

the

two

upper

contacts

(1

),

Fig.6, and force

the

contacts

toward

their

pivot

point

sufficiently

far

to

disengage

the

contact

stop

surface

from

the

pin.

2.

The

contact

can

then

be

removed

by

disengaging

the

end

of

the

contact

from

its

spring

(22), Fig. 5.

3.

The

lower

contacts

can

be

similarly

removed.

Replacement

of

StationaryContacts

(1

), Fig. 6

or

(24), Fig. 5

1. Coat

the

contact

pivot

area

only

of

each

of

the

six

contacts

(i

),

Fig.

6,

with a

thin

coat

of

D50HD38

grease.

2.

Note

the

difference

between

the

three

types

of

stationary

contacts

and

be

sure

to

locate

them

in

the

breaker

with

the

upper

and

lower

contacts

having

their

stop-projecting

surfaces

as

shown

in

the

section

AA, Fig. 5.

The

upper

left and

lower

right

contacts

are

identical as are

the

lower left and

upper

right

contac:ts.

SECTION

1.

2.

3.

4.

5.

6.

7.

8.

n

..:..

-~-----------~---·-·-··

10----~

9----~

11

_____

___,,

12-------~

13---------9'1

24 22

FRONT VIEW OF

STATIONARY CONTACTS

AND SPRINGS

Breaker

base

Barrier

Insulated

stud

Upper

stud

barrier

Insulated

screws

Barrier

Links

(insulated)

Tie

bolt

SECTION A-A

9.

Hole

plug

10.

Spring

clip

retainer

i

1.

Cross

bar

12. Pivot

13.

Connector

14.

Bolt

15.

Lower

stud

16.

Contact

pivot

support

·----------·---_,,

___

_

--

---·

22

21

15

17. Phase

sensor

18.

Contact

wipe

adjustment

19.

Screw

20.

Upper

stud

&

arc

runner

21.

Movable

contact

22.

Stationary

contact

springs

23.

Nut

24.

Stationary

contacts

Pig.

5.

Back frame!contaci assembly

13

Courtesy of NationalSwitchgear.com

wer

ers

SECTION

5 -

Basic

Breaker

Compo

ents

the contact

c,.J.n

bn

1·~.c1ie.s

i;--;

i;·1~

(:.tos~s

J:.-,rd·,

~·ho::-:

i

:•

.d~·;:~f);-;

;..:;nd

Jh.i::.;

su~-·race

and

!n~~aH

cid~

a trim coat ol

D50HlKl8

wease

2.

A::;semble the center pole movable contacts, the

pivot pin hoies, and instaii the pivot pin and spiit pin.

3. Move the cross bar assembly (6), Fig. 6, into position and

insert

the

eccentric contact wipe adjustment pin (18), Fig. 5, on

the

center pole into position. Be sure

the

stationary insulation

barriers are correctly located.

4. Align the cross

bar

with the left and right pole pivot

supports (16) and install the left and right pole movable contacts.

1.

Stationary

contacts

6.

Crossbar

assembly

2.

Movable

contacts

7.

Crossbar inner shield

3. Hole plug 8. Lower

stud

4.

Upper stud phase barrier 9. Phase

sensors

5.

Crossbar

plastic

end shield

Fig.

6.

Back frame -location

of

crossbar

and

pole

shields

14

7.

Adjust the

coniact

depression. If

the

moving contacts are

not centered when closed against the fixed contacts,

they

should be bent laterally.

-

_8.

Operate the breaker manually several times to assure

proper functioning occurs, then replace the arc quenchers.

When replacing the arc quenchers be sure the

quencher

is

seated downward completely and that

the

quencher

clamp

covers the knobs protruding through the arc

quencher

insulation.

ContactSprings (22), Fig. 5

A minimum force of 7 lbs and a

maximum

force

of

8 lbs

should be required to begin movement of a single stationary

contact from the open position towards the closed position. This

may be checked by using a push scale applied at

the

center

of

the

contact's

curved surface. Ifthese pressures are not

obtained, the spring

anchor

tabs may require

bending

for

adjustment.

If

the spring is damaged, replacement is required.

To

replace or adjust the contact springs, the upper stud (20),

Fig.

5,

must be removed. The hardware which fastens

the

stud

to the breaker base consists of two screws (i 9) and nut (23).

When these are removed, the stud (i 3) and barrier (2) may be

withdrawn from the base in a forward direction.

Contact force may also be adjusted without removal of the

upper stud by slightly bending the stationary

hool<

ends (Up to

increase force; Down to decrease force).

Mechanism

The breaker mechanism is a spring actuated, over-center

toggle-type mechanism. As the closing force is applied, either by

movement of the operating handle or the closing solenoid

armature, energy is stored in the operating springs. After the

springs have gone over center, movement of the output

crank

of

the mechanism is still blocked for a time by a cam arrangement.

As the springs are

further

extended, the blocking cam moves

away from the output crank and the springs are allowed to

discharge part of their stored energy, closing the breaker

contacts.

This assures a fast-snapping closing action regardless of

the speed at which the closing handle or solenoid is operated.

The breaker mechanism is tripped by the displacemt3nt of

the trip latch (7), Fig.

8.

Looking at the breaker from the right-

SECTI

1.

Arc

quencher

retainer

2.

Cut-Off

switch

3.

Cut-Off

switch

actuator

4. Toggle

link

stop

5.

Spring carrier

6.

Shoulder

7.

Connecting

link

8.

Trip

latch

9.

Trip

shaft

10.

Front

escutcheon

(Deep

escutcheon

removed)

11.

Closing

solenoid

12.

Location

of

slots

for

maintenance

handle

r

13.

Closing

solenoid

armature

Fig.

7.

Electric mechanism

hand side as in Fig.

l,

the

tripping movement of the latch is

counterclockwise. Operation of any of the automatic trip devices

or the trip push button causes the latch to move in the tripping

direction. When

the

latch moves off the trip latch roller, the

remaining force in the operating spring causes the mechanism

toggle to collapse, resulting in the opening of the breaker

contacts.

pon

n

1.

Arc quencher

muffler

2.

Ceramic

side

plates

3.

Arc

chute

barrier

4.

Fixed centers in

mechanism

5.

Latch roller

6.

Escutcheon (Deep

escutcheon

removed)

7.

Trip

latch

8.

Handle

return spring

----·------

Fig.

8.

Manual mechanism

Adjustment

If

the

breaker mechanism does not function properly, it is

best to first perform the available remedial measures listed in

the Troubleshooting Chart in Section

4.

One ofthe remedies

listed is that

of

proper mechanism latch engagement, i.e., the

amount

of

engagement

between the latch (7), Fig.

8,

and latch

15

Courtesy of NationalSwitchgear.com

ersPower

SECTION

5

Basic

Breaker

Components

i\JDTE: Bol'ote

ihe

end

ol

ihe

i&.fc.i:

a.u'Ju~irnent'

ssre~li/

is riqid!v

shaft

(9),

Fiq.

any

relative-

movement

between

the

tvvo

fr;

notod,.

tigtJten the fastener.;; the imrtFif w tile

trip shaft. Verity

that

no trip

paddles

are restricting the

buffer

leaf

spring's

shock

absorption in the reset

position.

Latch Adjustment

1. Locate the latch adjustment

screw

on the lower, outer

side of the right-hand mechanism side frame. This screw is

threaded through a nylon insert

locknut

which, in turn, is welded

to a projecting bracket on

the

mechanism side frame.

2.

Close breaker. Turn in (tighten) adjusting screw slowly

until breaker just trips.

NOTE:

If

mechanism

will

not

closebreaker,

withdraw

the

screw

approximately

two

turns to

permit

closure.

3. Withdraw

the

adjusting screw three and one-half turns

from the position noted in Step

2.

This

sets the proper amount of

latch engagement. Re-check all trip paddle clearances.

4. Should the mechanism continue to function improperly

after the proper latch

engagement

has been set and the

corrective measures listed in the Troubleshooting Chart, Section

4,

carried out, it is recommended that no attempt be made to

repair the mechanism interior but that a replacement

mechanism assembly be obtained from the factory.

Mechanism Replacement

1. If the breaker is electrically operated, remove the front

escutcheon held by four screws. If

the

breaker is a

draw

out

type, remove the

deep

escutcheon held by three hex screws.

(For removal of front escutcheon from manuallyoperated

breakers, see the following procedure.)

2.

Remove arc quenchers (see

"Arc

Quencher"

in this

section).

3. Disconnect

the

two

insulated connecting links between

the mechanism and the contacts as in Step 2 of

the

procedure

for "Separation of Front and Back

Frames"

in Section 4.

4. Remove the

two

elastic stop nuts which fasten the upper

extensions of mechanism frame to studs connecting with rear

frame.

S.

Hetnove

fou.r

~rrevvs

vvhH-:~1

fasten

the

hottorn

of

the

«riechanisrn frs.n·ie

to

be

n-Psessarv

to

disconnect

UH?

mechanisrn from

H1e

solenoid

Armature.

To

do

displace the latch and raise the

mechanism

as far as

the

travel of

the

an.-.atUi"e will per;11it.

Remove

the

screw

which

holds together the two extensions of the armature. After

this

is

removed, the armature extensions

must

be spread apart to

release them from the linkconnecting with the mechanism. This

can

be

done

by

threading a #10-32 screw at least 1-3/4 inches

long into the top hole of the armature extension. This hole is just

above the one from which the binding screw has been removed.

As the end of the screw butts against the far extension,

the

two

extensions will be spread open, releasing the

mechanism

link.

8. The replacement mectianism

may

be installed by

reversing the disassembly procedures. After reassembly,

check

the operation of the breaker and, if necessary, adjust the latch

engagement.

Removal

of

Front Escutcheon

of

Manual

Breakers

1. Loosen

the

set screw fastening the handle to

the

operating shaft and remove.

2.

Remove the retainer and two flat washers from

the

shaft.

3. Remove four screws from the flange of the escutcheon. If

the

breaker is a

draw

out type, first remove the

deep

escutcheon

held by three hex screws.

4. Push steel operating shaft

through

escutcheon bushing.

5.

Remove handle reset spring (8), Fig. 8., and the

escutcheon is free of the breaker.

Auxmary Switch

The

auxiliary switch is mounted on

the

left side of the

operating mechanism frame. Its operating shaft is linked to the

output crank of

the

breaker mechanism.

Through

a cam

arrangement, the operating shaft of

the

switch controls the open

and closed positions of the individual contact pairs. Each stage

of the switch, which is usually two-stage or five-stage, contains

one

"a"

and one

"b"

set of contacts. An

"a"

pair of contacts is

always in the same position as the main breaker contacts. That

is, open when the breaker contacts are open and closed

when

the breaker contacts are closed. The opposite is true of the

"b"

contacts. The terminals ofthe switch are covered by a

sheet

of

insulating material held in place by two screws fastened along

its left edge. When this is removed, the terminals are exposed.

The upper pairs of terminals

am

those which connect to

"a"

switches. The lowerterminals connect to

"b''

switches.

SECTION

5 -

Basic

Breaker

Components

~\gQTE:

VVUh

roecha.nisrn in

ih~:~

CJ

___

().E-~~~~:L)

access

is improved.

2.

mHshg_nism

SECTION

6 -

Electrical

Replacement

Control

Components

Closing Solenoid

The closing solenoid (11), Fig. 7, consists of a magnet,

armature and coil. This assembly is located directly beneath the

breaker

mechanism

to which it is connected

by

a link which ties

the upper end of

the

armature to the spring carrier of the

mechanism.

Coil Replacement

1. Remove escutcheon by unfastening four flat head screws

in flange.

2. Remove closing switch (see

"Closing

Switch"

in this

section).

3.

Cut

off or

disconnect

the coil leads.

4. Remove

four

screws which fasten lower section of

magnet to

upper

section.

5. Disconnect armature from mechanism (see

"Mechanism

Replacement,"

Section 5) and slide assembly down.

6. Reassemble with new coil by reversing order of

disassembly.

HK" Relay

The

"K"

relay is a heavy-duty relay which performs

the

function of closing the circuit of

the

breaker solenoid

during

electrical operations. Three of the four sets of contacts

of

the

device are arranged in series to minimize the

duty

required of

any one contact. As explained under

"Operation,"

Section 3, the

fourth contact is used to

"seal-in"

the

"K"

coil.

The

"K"

relay is located on

the

lower right behind the

programmer.

To

replace the relay, remove the

programmer

mounting bracket first. Disconnect wires (noting location) and

three mounting screws.

"E"

Relay

As described under

"Operation,"

Section

3,

the

"E"

relay is

a permissive relay which provides anti-pump protection. It is

shock-mounted to the arc chute retainer clamp.

Replacement

If replacement of the

"E"

relay becomes necessary, it

may

be detached from its supporting brackets

by

removal of

the

fastening hardware. The leads to the relay should be

cut

off

as

closely as possible to the soldered connections so

that

enough

wire will remain

tor

connection to the new relay.

After replacement has been completed, the relay may be

checked electrically in the following manner:

1. Apply closing voltage to terminal board or

secondary

disconnnects.

2.

Push the button of closing switch and hold closed.

3. Continue to hold the push button in

the

"closed"

position

and manually trip the breaker open.

4. If the breaker stays open and makes no attempts to close,

the

"E"

relay is functioning properly.

5.

While releasing the close button, observe the

"E"

relay.

It

should open as the closing switch is released.

Cutoff Switch (Fig.

9)

As explained under

"Operation,"

Section 3,

the

function of

the cutoff switch is to de-energize the

"f("

contactor coil and

energize the

"E"

relay coil as the breaker mechanism moves

from the opened to the closed position.

The switch is operated by the movement

of

a mechanism

link against the switch actuator (6), Fig.

9.

This

causes the

Courtesy of NationalSwitchgear.com

wer

tBr

ers

SECTION

6 - E!ectric.al Repiacement

Centro~

Components

Tt1e

breaker closinq

been driven "ov">l·-centm." This

B.ssurss

that the cutoff switch

cannot

oper::i.te

too

ec>rl~'

!r1

the

bre0.ker

dosing

cyrJ<:>,

thus

the

"K"

and

"E"

relays are de"energized and energized, respectively,

at the proper time and the circuit's anti-pump feature is

maintained.

Replacement

The cutoff switch is located above the breaker mechanism.

It is fitted between the upper portions ofthe steel side plates that

make up the mechanism frame. A raised horizontal ridge

on

each side of the molded body of the switch fits into a

corresponding groove in each ofthe steel side plates. A round

head screw

on

each side fastens the switch and side plate

together. Replacement of the switch is accomplished by the

following procedure:

i.

Remove the cover on the top of the switch by taking out

the two screws which hold it in place.

2. After taking careful note of the connection arrangements,

disconnect the leads from the switch terminals.

3. Remove the two screws, one on each side, which fasten

the switch to the mechanism side plates.The top two flux shifter

(1)

SCREW---------~

(2)

WASHER//

..

..---

-

~

ell

I

'------,

I I

(4)

MOVABLE

CONT

ACT

L_.ll

____

'b;:J;~

ASSEMBLY '-..____

(5) SPRING

access

to

the

The

closing

s·.vitch

;::;

mounted

on

the

upper

flange

of

the

closing solenoid coil. A hole in the escutcheon

(3),

Fig. i

0,

permits access to the switch button (4). When the button is

pressed, movable contact (5) deflects and impinges upon

stationary contact

(2).

This energizes the

"K"

relay coil which

seals itself in, and,

in

turn, energizes the closing solenoid.

Replacement

1. Remove escutcheon (3), Fig. 10.

2.

Disconnect leads from switch terminals.

3. Deflect the left end of hinge (7) to the left so that the

movable contact (5) may

be

disengaged from the switch

assembly.

4. Removal of the two screws (10) from speed nuts (9)

completes the disassembly of the switch.

5. Reassembly with new parts is a matter of reversing the

described procedure.

In

reassembling,

be

sure the tab on the

left end of hinge

(7)

is bent to the right far enough to avoid any

possibility that movable contact (5) might become free of the

assembly.

~SUPPORT

(iO)

CONTACT

(N.O.)

(9)

..---CONTACT (N.C.)

(8)

.......

_______

_

---

ACTUATOR

(6)

Fig.

9.

Cut-off

switch

18

!ON

6

·-

Electrical

Replacement

Control

Components

'lfvh:~h

hP-on;

rj0ains~

t:1e

tr~p

n;;.drlle \.12) on

H1e

·the

(>Jij

Js

Pn~1·qiz~;ft

Thls

th'8

~--··-----------·--------·---

("i)

INSULATION-------.

,----------SCREW

(10)

(2) STATIONARY CONTACT

~-----SPEED

NUT

(9)

~

(3) FRONT

ESCUTCHEON~--

(4)

PUSH

BU;:-

--~)'I

rr==-=::-j-<;---=i__,~/-in---..'\.

~S<

HINGE

(7)

(5) MOVABLE

CONTACT-------~

~-----SPRING

(6)

Fig.

10.

Closing

switch

(top view)

(1)

NUT------~

(2)

FRAME----

(3)

SPRING-----

(5)

WEIGHT---

C1)

MAGNET----

---·------------

Fig.

11.

.---------TRIP

SHAFT (14)

CLAMP

MECHANISM (13)

FRAME

-------

-----

TRIP PADDLE

(i

2)

Shunt

trip device

ARMATURE (11)

ARM

Courtesy of NationalSwitchgear.com

t ers

Power

SECTION

6 Electrical Replacement

Control

Components

when

the

device

it;

ro

be sure

of

this,

armature

Hnn

(11),

i

1,

rnust trn.vel from i

/.T?

to

V

16

inch

the

poi11l

wi1ici·1

lhe

breaker trips. A guod method

checking

this

is

to

insert a 1132-inch shim between

tl1e

magnet

(7)

and armature

(10)

and

with

tile

breaker closed,

push down on the arm

(11),

closing the armature against

the magnet. If the breaker trips, there is sufficient over-

travel. If adjustment is necessary,

trip

paddle

(12),

Fig.

11,

may be formed towards or away from the armature arm

(11).

Assure a

minimum

clearance

of

1116

inch between the trip

paddle and breaker frame

with

the mechanism in the

RESET position.

20

1. Stop

2.

Armature

3.

Insert wire gage

Fig.

12.

Undervoltage device positive trip

check

SECTION

7 - Protective Devices

the

lm~aker

when its coil

i;c;

to

diPViGe'

i5

the

rated

voltage.

An

opon

arrna!m<'i will ffHKler

U1e

breaker

t<J

trip

th?l bm8.k"lr must h"l democ;;;trated.

rn'

dosm9.

!he

mrn!:l!ure

up"

and aliovvs Undervoltage devices trip the broo.ker when

t!1e

mm:::num

opens. This causes

an~xtension

on

the armature to strike the

closing, itthe voltage is 85 percent or more of its nominal value.

(1) MOUNTING

SCREW

(3) ARMATURE

(5)

SHADING

RING

(6) ADJUSTING

SCREW

ADJUSTING (20)

SCREW

TRIP PADDLE (19)

_..::,,..

TRIP PADDLE (18)

CLAMPS

MECHANISM (17)

,,-_,,..

____

FRAME

hl.-1--+-l------

MOUNTING

(16)

--~~

NUT

~==:t=====~~

LOCKING WIRE (15)

ADJUSTING SCREW (14)

-------

RIVET

(13)

;=i....--+1-------COIL

(i2)

SCREWS (11)

,..__

___

_

---

CLAMP

(9)

------------

---·

Fig.

13.

Undervoitage tripping device

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of

H1P

other

enri

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the

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<...l•"

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o..;;

V~•'I.-:,/

..,,,·.~·£,;J,

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device frame and lirrdts the movemern

011hs

arrn~uurc.

vvncn

,,,,,,,,

'C"',,"

-.~1op:s

shovvn

in

Fig. 12. t\!ote

i~~:at

only

the

lhe siup.

If

the

undervoltage

device

does

not

have

positive

tripping

ability, the

adjustment

screw

of the

trip

paddle

assembly

on

the

trip

shaft

may

be

turned

in

increments

of

half

turns

until

the

check

is

successful.

When

the

undervoltage

device

is

closed

and

the

breaker

mechanism

is

reset,

there

must

be

clearance

(1

/32-inch

minimum)

between

the

trip

paddle

and

the

device

armature.

StaticTime-Delay Undervoltage

In

addition

to

the

undervoltage

tripping

device

mounted

on

the

breaker,

the

static

time-delay

undervoltage

includes

a

separately

mounted

time-delay

unit.

Table 2

lists

the

catalog

numbers

of

the

available

units.

If

the

ac

control

voltage

is

any

voltage

other

than

208/240

Vac, a

control

power

transformer

(also

remotely

mounted

with

respect

to

the

breaker)

must

be

used.

This

must

have

a

minimum

rating

of

i 00

volt-amperes.

When

installed,

the

voltage

to

be

monitored

is

connected

across

terminals

No.

i

and

No.

2

of

the

static

delay

box.

The

coil

of

the

tripping

unit

is

connected

across

terminals

No.

4

and

No.

5

of

the

static

box

through

the

secondary

disconnects

of

the

breaker.

The

secondary

disconnects

to

be

used

will

be

shown

on

the

breaker

wiring

diagram.

No

more

than

one

undervoltage

tripping

device

should

be

used

in

conjunction

with

one

static

time-delay

unit.

In

the

event

the

device

fails

to

pick

up,

the

following

checks

are

recommended

to

determine

whether

the

magnetic

device

on

the

breaker

or

the

static

time-delay

unit

is

the

faulty

component:

1.

Check

input

voltages

across

terminals

1

and

2

on

the

static

box.

See

Table 2

for

these

values.

Table 2 - Time-delay Units

Cat. No.

TAKYUVT-1

TAKYUVT-2

TAKYUVT-3

Control

Voltage

Terminals

1&2

125Vdc

250 Vdc

208/240 Vac

i

I

Cl)

CR()SS

B/\R

/'"

'\

'

........

-~·L:--·i

_\\

·-

..

,

\',I

/ \

/ / ,,

~;((i;''*',

:

-"rn

~L~;~;y

__

jj

(2)

LEFT

SIDE

FRAME

(3)

TRIP

PADDLE

I I

I

_I

'-

----

_/

(4) UNDERVOLTAGE

ARMATURE

Fig.

14.

Electric lockout device

2.

Check

output

voltages

on

terminals

4

and

5

with

the

undervo!tage

device

connected.

See

Table 2

tor

values.

3.

Check

resistance

of

the

disconnected

undervoltage

device.

See

Table 2

for

values.

See

Instruction

Sheet

GEH-4545

for

more

detailed

information,

including

schematic

diagrams

and

circuit

description.

Electric

lockout

Device (Fig. 14)

The

electric

lockout

device

holds

an

open

breaker

trip-free

when

the

coil

of

the

undervoltage

device

is

de-energized.

When

the

breaker

is in

the

closed

position,

linkage

operated

by

the

Approximate

Steady

Sl:ate

DC

Operating

Voltage

Terminals

4&5

50

100

110/125

Nominal

DC Coil

Resistance

(Ohms)

@25°C

,--1--------"--·-·---

440

1600

-----------~,

__________

_..._

____

,

_____

,

__

_

22

N = Protecth1e D

aherna~e

breaker,

pre~ento

a convenient rnethod of

The

bell

alarm

device

is

mounted

on

top.of

the

front

frame

just

to

the

left

of

the

mechanism

frame.

This

device

operates

a

switch

with

two

sets

of

contacts,

one

normally

open,

the

other

normally

closed.

The

switch

may

be

used

to

open

or

close

an

external

circuit,

giving

a

bell

or

light

indication

of

a

protective

trip

device

operation.

If

the

breaker

is

tripped

open

by

any

means

other

than

the

manual

trip

button

or

the

shunt

trip

device,

the

bell

alarm

(1)

LINK------~

f'tH-~

;f~v~2r

·i

r':l:JnnH~ited

to

the

brtJak.oc~~~

mechanism

RO

that

vlfhen

the

bn:c;Rker

0pensi

l~v~r

rot~.tes

countercl.c;ckvv

1lse 8bout

{·1

The rnoilon is

trans1··nlHed

thrm.Jgh

links

("i)

and

{18)

tb

paddle

(12)

which

opera!es

beii

alarm

switch

(i 1

).

If

the

device

has

the

lockout

feature,

the

movement

of

link

(13)

also

causes

lockout

link

(8)

to

slide

in a

direction

that

results

in

its

striking

trip

paddle

(5)

which,

by

displacement

of

the

breaker

mechanism

trip

latch,

makes

it

impossible

to

reset

the

breaker

mechanism

until

the

bell

alarm

mechanism

is reset.

Link

(6)

serves

as

a

latch

in

the

bell

alarm

mechanism.

If it

is

displaced,

link

(10) is

free

to

rotate

about

its

lower

pin.

This

deprives

the

linkage

of

its

normally

fixed

center

of

rotation

about

(15)

and

defeats

both

the

bell

alarm

and

the

lockout

operation.

Operation

of

either

the

manual

trip

button

or

the

shunt

LINK

(13)

(2)

LEVER-,-~

(3)

(4)

TRIP

SHAFT

SWITCH (11)

(12)

PADDLE

~--PIN

(14)

·PIN

(15)

-

SPRINGS

(16)

,_________________,_________,

_________

,____

23

Courtesy of NationalSwitchgear.com

wer

c t ers

Tl1B

open fuse lockout rJevice consisis of thiee

s1::ipwo.iely

coiis (one per phase). Each coi!

is

wired

in

parallel to the

corresponding

breaker

fuses. This device is

furnished on all

AKRU

breakers.

The

purpose

of

this device is to

trip

the

breaker upon

the

blowing

of

any

one

of

the

breaker fuses

and render the

breaker

trip

free until

the

blown

fuse

is replaced

and the associated coil

assembly

reset.

Operation

When

any one

of

the

breaker fuses blow, the coil (6),

Fig. i 6, in

that

phase is energized and the armature (5) closes.

With the

armature

closed, lever(2) slips

under

the

armature

and

latches it in the closed position.

The

latched closed armature

holds the breaker in

the

trip-free position until it is released by

pushing the associated reset button (3).

The

coil is de-energized

as soon as the

breaker

opens.

Adjustments

i.

With

the

breaker

in the closed position and OFLO reset,

the top collar must

clear

the

trip

shaft paddle by a

minimum

of

1/32 inch.

2.

Check

that

each

armature

holds

the breaker trip free

when the

armature

position is limited in reset by the lower latch

surface on the

indicator

(blown fuse condition).

Replacement

i.

Remove

the

mounting

screws on top

of

the device.

2. Remove coil leads from fuses and workwire harness

back

to the device. Remove device

from

breaker.

3. Replace

new

unit

in reverse

order

and

check

procedure

under

"Adjustments."

24

1.

Mounting

holes

4.

Collar

2.

Lever 5.

Armature

3. Reset

button

6. Coil·

Fig.

16.

Open fuse lockout device

SECTION

1

~Protective

Devi

liJ interlock screw

(l

),

l

-r.

rotate

scrnw

CCW

to full

"disconnect"

pusiiiun. Rotate this

screw

CVI/

23 full turns.

Back

out

screw

(1)

to close breaker. Run in

screw

until

breaker

just

trips. Run in

screw

one

additional turn and

tighten

jam

nut.

Continue

to rotate racking

screw

CW

to full

"con~ect"

position stop.

Check

that

screw

(1-)

has

approximately

1/32-mch

clearance

with

trip

paddle.

To

adjust, rotate trip

paddle

about

its

mounting

screw

and re-tighten.

1.

Trip

interlock

2.

Rackout

mechanism

interlock

Fig.

17.

Draw

out

interlocks

25

Courtesy of NationalSwitchgear.com

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;o ers

.

®T

. D

np np

··~

26

inµ

d~:H:icc

~ysienL

lh8

pr~.--.~J:

~,.nn~n~~r

1

current

;;:H~nsors,

3.nd a 'flux

!

:-PROGRAMMER-;:;-;--l~--

-.-·

--

-i

FLUX SHIFTER

1---00LID

I

- - TRIP COIL >-----+ STATE

I

S~ITCH

I

CURRENT

SENSORI

I

~cp,_.C_T_

tT

AP

BOARD I I

L__

-=--=-~-

__

J

Qii----+-~

OVERLOAD

TARGET

NEUTRAL

WHEN

REQUIRED

,-

1

I

LOGIC

OR

LONG TIME

PICKUP &

DELAY

SHORT TIME

PICKUP &

DELAY

INSTANTANEOUS

PICKUP

Q•I----+---'-

,__

_

__,.,___

SHORT

CIRCUIT

TARGET

I

Q·1----+--1-

GROUND

TARGET

I

<1i

~

I

µ,_..;~~

SUMMING GROUND FAULT

1-J.--"-'3--1

CIRCUITRY PICKUP &

I--·----'

I

N DELAY

I t I

I

~-----

:~

1

REG-UL--'A'--TE_D

__

__,

I

't'-

i5VDC

1>

3 p'owER SUPPLY I

L------~-

·-- -

-----

__

J

Fig.

18.

MicroVersaTrip®

block

diagram

SECTION

8 - MicroVersaTrip®

Trip

Device

Fig.

19.

MicroVersaTrip®

Programmer

breaker. It contains a programmable microelectronic processor

which incorporates nine adjustable time-current functions, three

mechanical fault indicators (local and remote), a long-time

pickup (local LED indicator, remote 1/2

A,

120

Vac

switch) and a

zone selective interlocking function. All adjustable programmer

functions are automatic arid self-contained requiring no external

relaying, power supply or accessories. A detailed description of

each trip function is given

in

publications GEA-10265 and GEH-

4657.

Fault Trip Indicators

The optional fault trip indicators are mechanical pop-out

type for identifying overload or short circuit over-currents faults

when breakers are ordered without integral ground fault

protection. They are also available to identify overload, short

circuit and ground fault trips for breakers supplied with integral

ground fault protection.

Each target pops out when its associated trip element

operates to trip the breaker. After a trip, the popped target must

be reset by hand. However, neglecting to reset does not affect

normal operation of any trip element or prevent the breakerfrom

being closed.

Hflmo1e

ia111\

111ciir"Jt1i'm

is

availahie in rhe

form

of

a

mechanical contac1 which may be mcorporatecl into the

open contact

t<c1rget

pops

out

\f\Jhen

the

J.1ici !

.0

amp

(1

Oamp

The rernoie fault i11dication

~;witch

leads are

broughl

out !he

bottom ofthe iV!icro\/ersalrip programmer as shrntm in Fig. 20"

This switch lead harness

is

plugged into the mating connector

on

the breaker. -

The switch leads are brought out from the breaker through

the programmer secondary disconnect shown in Fig. 20. The

zone selective interlocking function wiring is also brought out

through this disconnect. See Figs. 28 and 29 for the remote fault

indication and zone selective interlocking cable diagrams.

i.

4th wire disconnect (neutral sensor)

2.

Programming secondary disconnects

3.

Programmer mount locking lever

4.

Remote target harness disconnect

Fig.

20.

Programmer

installation

and

second-

ary' disconnects

27

Courtesy of NationalSwitchgear.com

Power ers

SECT~Ot'.J

8 - MicroVersaTrip®

Trip

Device

;-ijl~c~~sE;f~.rv

r.onncctr:r ongngnmont.

Th8

ipc:~lng

lov0r

engage~.

'ltdth

U1~

i-.~hlch

ls

,s.ssem1blGid

to

thB prngr:::lmmcr

frame

and

socuror;

th0

pr0wanm1er

to

U'1e

m0uni1ng

bracket. ·Io

remove

µrogra1111ne1,

disconnect remote fault indication harnnss (it equipped), pull

locking

lever

out,

and

removo

programmer

by

pulling

forwaxd.

To

install programmer, align

guide

pins and push on until locking

lever

snaps

back

in.

Reconnect

remote harness (if equipped).

Verify that

programmer

is fully seated and secure.

Current Sensors

The

current

sensors

supply

the

power

and signal

input

necessary to

operate

the

trip

system.

The

Micro

VersaTrip uses

three phase and

one

neutral sensor.

Figure 6 shows

the

phase sensors assembled to the back

frame. Tapped and fixed phase sensors are available.

The

tapped sensors provide field

adjustment

of

the

trip

device's

continuous

ampere

rating. See Fig. 23 for cable diagram.

The

tapped and fixed phase sensors have a polarity

associated with

their

windings.

Their

COMMON

terminal is the

right-hand

terminal

as shown in Fig. 6. A white wire with a ring

terminal will be

connected

to this

COMMON

terminal. All phase

sensors

must

be

correctly

wired for

the

programmer

summing

circuit to function properly.

Special phase sensors are used

when

the short time

("M"

-option) or the hi-level

instantaneous

MicroVersaTrip option

("H"-option)

is required.

These

sensors have four leads, two flag

terminal

connections

(air core winding), and

two

screw

terminal

connections (ampere rating).

There

is no polarity associated

with the flag terminals. Figure

27

shows the connections for the

additional air core

windings.

A neutral

sensor

is required

when

integral

ground

fault

protection is used on single-phase three-wire

or

three-phase

four-wire systems. It is inserted into

the

neutral

conductor

and therefore is separately

mounted

in the cable or bus

compartment.

The

outputs

of

the phase sensors and neutral sensor are

connected to a

programmer

circuit

which

sums these values.

The total value will remain zero as long as there is no ground

current flowing. See cable

diagram,

Fig. 24.

The

neutral

sensor

is an electrical

duplicate

of the phase

sensor, including taps. Therefore,

when

taps are charged on the

phase sensors, those on the neutral sensor

must

be

correspondingly positioned.

Since the neutral

sensor

is

mounted

separately from the

breaker, a

disconnect

means

is required to

connect

its

output

to

the breaker. Figure 20 shows the

breaker

mounted

4th wire

secondary

disconnect

used

vvith

the

~J1icroVersaTrip

system.

28

.2.

Ru~nove

3.

Lousan the

buH

(I

4}

and n

..

nnove the siud

connector. UH out the

sm1sor

with its terminal board.

4.

VVhcn

replacing

t:1a

stud

connector,

make sur0

the

screws and

clamping

bolts are

sufficiently

tightened.

5.

When

replacing

the

programmer

harness

to the phase

sensors verify

that

the

winding

polarity is maintained,

white

wire

with

ring

terminal

to

COMMON

terminal

(right-hand terminal).

FluxShiftTrip Device

The

flux shift trip device is a low-energy,

electromagnetic

device which, upon receipt

of

a trip signal from the

programmer

unit, trips the breaker by actuating

the

trip

shaft.

The

mounting

arrangement

of

this

component

is illustrated

in Fig. 21. An

electromagnetic

actuator located on

the

right

side

ACTUATOR

RIGHT

OPERATING

LINK

Fig.

21.

Flux shifter trip device

SECTiON

8 - MicroVersaTrip®

Tri

Device

oppose::; the magnet,

armature: this drives

tile

tripping

!he

breaker.

As the

breaker

opens,

the

actuator

arm

is returned to its

normal (RESET) position

via

a pin

driven

by

the right-side

crossbar

operating

link.

The

permanent

magnet

again holds the

armature

captive in readiness for the

The

trip

device

requires

only

one

adjustment

-the

trip

rod

length. As shown in Fig. 21, the

clearance

between

the

trip

rod

end and

the

trip

shaft

paddle

is 0.093 to 0.125 inch.

To

adjust,

open

the

breaker

and restore the

breaker

mechanism

to its

RESET position. Loosen the

jam

nut, rotate the adjuster end

until fhe

proper

gap

is attained, then retighten the

jam

nut.

The

actuator

is a sealed, factory-set

device

and requires no

maintenance

or

field adjustment. In case

of

malfunction,

the

complete

actuator

unit

should

be replaced.

When

making

the

electrical connection to

the

replacement

unit, untie the

breaker

harness and remove

the

old actuator leads directly from the

female

AMP

connector

on the end

of

the

breaker

harness.

When

replacing a MicroVersaTrip flux shifter,

AMP

extraction tool Cat. No. 455822-2 is required to remove

the

socket leads from the

AMP

connector.

See

cable

diagram,

Fig. 23, for

correct

pin locations.

Troubleshooting

When

malfunctioning

is suspected,

the

first

step

in

troubleshooting is to examine.the circuit

breaker

and its

power

system for

abnormal

conditions

such as:

1. Breaker tripping in

proper

response to overcurrents

or

incipient

ground

faults.

2. Breaker remaining in a trip-free state

due

to mechanical

interference along its

trip

shaft.

3. Inadvertent

shunt

trip

activations.

WARNING:

00

NOT

CHANGE

TAPS

ON

THE

-~

CURRENTSENSORS OR

ADJUST

THE

PROGRAMMER UNITSETKNOBS WHILE THE

BREAKER IS CARRYING CURRENT.

--

Once

it

has

been established that

the

circuit

breaker

can be

opened and closed

normally

from the test position, attention can

be

directed

to the trip

device

proper. Testing is performed by

either

of

two

methods:

1.

Conduct

high-current, single-phase tests on the

breaker

using a high-current low-voltage test set.

.26.

This

test cable the

pragrarnrner

circuit

in

a

se!f~cance!ling,

series~

parallel connecflon

so

thatits

output

is

always

zero.

2.

Test the

components

of

the

MicroyersaTrip

system

using

portable Test Set Type TVTS1 (Fig. 22).

The

applicable

test

procedures are detailed in instruction book GEK-64464.

Resistance Values

For use in troubleshooting the MicroVersaTrip

current

sensors, the resistance

of

the tapped and fixed

windings

is given

in Tables 3 and 4 respectively.

Table 3 - Tapped Sensor Resistance

Values

Resistance

in

Ohms

Ampere

Between

Common

Tap and Tap Terminals

100 5-6

150 7-9

225 11-19

300 16-19

300 19-22

400 25-30

600 40-47

800 56-66

Table 4 - Fixed Sensor Resistance

Values

Ampere

Rating

100

150

225

300

400

600

800

Resistance

in

Ohms

Between

Terminals

2-4

5-7

12-14

16-19

21-25

35-41

fi9-70

~--·---------~----

The coil resistance

of

the MicroVersaTrip flux

shifter

device

is

approximately seven ohms.

29

Courtesy of NationalSwitchgear.com

wer

t

Br

CTION

8 - MicroVersaTrip@

the

currents

!n

this

circuitry

add

to

zero

and

no

::;ig11;;1I

is This

cw1c11t

sum will bu

L<J10

only

if

all ih1ee

::sensors

have

!he

same eiecirical charauteristics.

if

one

sensor differs from the others (i.e., different rating or wrong tap

setting), the circuitry can produce output sufficient to trip the

breaker. Similarly, discontinuity between any sensor and the

programmer unit can cause a false trip signal.

If nuisance tripping is encountered on any breaker whose

MicroVersaTrip components have previously demonstrated

satisfactory performance via the

TVTSi

Test Set, the sensors

and their connections should be closely scrutinized. After

disconnecting the breaker from all power sources, proceed as

follows:

1.

Check that all phase sensors are the same type (ampere

range).

2.

Ensure that the tap settings on all 3-phase sensors are

identical.

p

~·:_i.

\/,~div

H1a(

thu

h;:rrk;

..

;:·~~

conn;::rJkVi·~:·::;

t.:)

th;;:~

S(:~nsor:s

rrH:H:~·;·

1jJtJSh.di~

1i~

..

: indk;aieU

~h:..:

c:J.bli~

ic

d

..

e,.nd

tap

seUinq as the

phase

sen:3ors.

b.

Check

continuity

berween

the

neutrai

sensor

and

its

equipmem-mounted secondary disconnect block.

Also check for continuity from the breaker-mounted

neutral secondary disconnect block through to the

female harness connector.

c.

If the breaker's lower studs connect to the supply

source, then the neutral sensor must have its LOAD

end connected to the source. See Fig. 25.

d. Ensure that the neutral conductor is carrying only

that neutral current associated with the breaker's

load current (neutral not shared with other loads).

e.

If the preceding steps fail to identify the problem,

then the sensor resistances should be measured.

Since the phase and neutral sensors are electrically

identical,

tlleir

tap-to-tap resistances should closely

agree. See Tables 3 and

4.

Fig.

22.

MicroVersaTrip®

test

set, Cat. No.

TVTS1

30

SECT!

N

8-Mi

;?.RE;r~;,<F

B/\C1<:

T-~

F\/\\

1

~

®Trip

PFl(){~

n/\~!l

tVi

FR

LEFT

POU:.:

_ _,...,,.,.,t-·'--

-1---T---t-------

-~~--t-o-t-'~

CURRErfl

SENSOFl

r r r

LOAD

BLACK I

I

L

___

_J

HARNESS

CONNECTOR

(AMP

1-350356-9)

PROGRAMMER

CONNECTOR

Fig.

23.

Cabling diagram -MicroVersaTrip®

without

ground

fault

and

MicroVersaTrip with

ground

fault

on 3-wire

load

..-------------_,

___,

¢A

cps

cpc

~~A

BREAKER

,-~-~-4'-I

BACK

FRAME~

6,

6

6.

LEFT

POLE

I

)==~=)=-==)=-

CURRENT

COM

I

SENSOR

:!

I

IA

I

NEUTRAL

SENSOR

DISCONNECT!

LINE,! I

---

I I

4-WIRE

LOAD

-----·--------------·

FLUX

SHIFT

TRIP

DEVICE

PROGRAMMER

UNIT

----1

I

L_

____

_J

HARNESS

CONNECTOR

(AMP

1-350356-9)

PROGRAMMER

CONNECTOR

Fig.

24.

Cabiing diagram -f\/iicmVersaTrip® with

ground

fault on 4-wire

load

31

Courtesy of NationalSwitchgear.com

Power Circuit Breakers

SECTION

8 - MicroVersaTrip®

Trip

Device

I

_J

HARNESS

V V V CONNECTOR

(AMP 1-1350356-9) PROGRAMMER

cp

A

cps

cpc

CONNECTOR

LOAD

Fig.

25.

Cabling diagram -Micro

Versa

Trip®

with groundfault on 4-wire load-breakerreverse

feed

BREAKER:)-

HARNESS

GROUND FAULT DEFEAT MODULE

CAT.

NO

TVTGD9 PROGRAMMER

UNIT

CONNECTOR 1

o-t-<

a+-<

o-t--<

o+-<

o-+-<

o+--<

o-t-<

o+-<

<>-+--<

o+-<

CH-<

o-+-<

o+-<

o-+-<

o-+--<

o+--<

L.J

,

,.

'

/

'

,.

'

/

'

/

'

/

'

,.

'

,

'

,

'

,

'

,.

'

/

'

/

'

~

/

'

,.

'

,

'

-l

f---

- -

---

;

~

)

I

2!J

I

.

~

.~

-4

.J

~

,~

------

-

,---,

~

I '

,

'

,.

'

,.

'

,.

'

0

~

,

3 ,

~4

,.

'6

'

-<

,f

-<

.,,

,

'

---

1-

-l

I

~I

I

f-H::> I

B--o

I I

B--0 I I

~I

I

401

I

tj-0

I

101

~

I

~I

I

I 0 I

ANY

MICROVERSATRIP""

PROGRAMMER

B-D I UNIT WITH

~I

GROUND FAULT

f+-o

I ELEMENT

~I

4--01

~I

I

L_j

L

__

_I

Fig.

26.

Cabling diagram with ground fault defeat module inserted between breaker harness

and MicroVersaTrip® programmer unit -for use during single-phase high-current

low-voitage testing

32

SECTION

8

~

MicroVersaTrip®

Trip

Device

I

PARTIAL

LFFT

POLE-·

CURRRCNT

SENSOR

------··------

LOAD

BLACK

HARNESS

CONNECTOR

PROGR1\MMER

UNIT .

··1

I

L

___

_J

PROGRAMMER

CONNECTOR

Fig.

27.

Partial cabling digram:

Air

core phase sequence winding connections

SHORT

CIRCUIT

GROUND

FAULT

PROGRAMMER

SECONDARY

DISCONNECT

EQUIPMENT BREAKER

REMOTE FAULT

INDICATION

CONNECTOR

BLACK

YELLOW

BLACK

YELLOW

BLACK

RED

BLACK

RED

BLACK

GREEN

BLACK

GREEN

BLACK

BLUE

BLACK

BLUE

AMP AMP AMP AMP

(1-350239-9) (1-350246-9) (1-350242-9) (1-350235-9)

Fig.

28.

Cabling diagram -remote fault indication

MICROVERSATRIP®

PROGRAMMER

,----,

I I

I

L

_____

_J

33

Courtesy of NationalSwitchgear.com

Power

SECTION

8

34

ers

AMP AMP

(1-350239-9)(1-350246-9)

t·.t1J(;H()\iL.HSAl'HlP

'::.til

H

/\

!\/!

i\/1

E

t-1

I

L

___

J

Fig.

29.

Cabling diagram -zone selective interlock

SECTION

9 -

Electrical

Characteristics

~

~',_-"!

~--,·-·~,

! I !

>'-o

~-,~O~:lY

'\,,;

,.,

{)~

,c;,.,,,~,.~,

"'

!...'.,'.c,

:.:.::1

::·_,;

~-)·

.:~-!

Vnaagf.;

~

t.i

Seo~ei'.1

'.'!:?

~l

~x·:

~j

~

'"

~

..

-~

'

~-~~,,

Op[i)n

~-

..

~~~01:0?:(~

..

,

,,

48V !

DC:

,063 30

125V

DC

100-i40

.024

90

250V DC 200-280 170 .015 .015 180

120V 60 .090 .052

120V 50 104-127 95 .090 .052 95

120V 25 .047 .032

208V 60 .050 029

208V 50 180-220 175 .050 .029 175

208V 25 .032 .018

240V 60 .064 .036

240V 50 208-254 190 .064 .036 190

240V 25 .035 .023

Table 6 - Bell Alarm Contact Rating

Bell

Alarm

Contact

Control

Voltage Rating (amperes)

Inrush

Continuous

DC 125 2.5 2.5

250 0.9 0.9

60 Hz. 120 30 10

AC 240 15 5

480 7 3

,,,,,

Co~y[a·o~

~~efany

·-:~f;'

'"

-'~•··

·~·~

'.--'

f\li'rlJ!l''.·, f.)

·;~

ilj)3

-.:'~~

2:,

b

~•'ii\,

h~rnsh

S~;;i:ed

.f

0

S;;;a~''"-:l

"'~

~

'

'J)

:-:

·i'1•

~

~-"

{~'j

(Jp:r::rn

C!oc:·~·"1

~\oz:n

'

•,,,

,.,

'''

'

''

4.i

£Li

95

1.05 L05 100 43.6

.53 .53

200

23.9

6A

-

1.0 .14 153 78.4 30A

1.0 .15 98 142 63.4

30A

6.85 1.27 70.6 45.5

i5A

.45 .063 90.8 37.4

15A

.55 .083 177 103 46.9

15A

3.86 .76 45.3 27.3 10A

.50 .07 67.5 27.6 15A

.50 .08 196 74.8 30.3 15A

3.42 .64 43.1 23.5

6A

Table 1 -

Auxma.ry

Switch Contact

Ratings

Auxiliary

Switch

Interrupting

Ratings

Control

Voltage (Amperes)&.

Non-

Inductive

lru:luctive

DC 48 25

-·

125

11

6.3

250 2 1.8

AC 115 75 50

240 50 25

480 25 12

;\

Llm1ted to 20A continuous rating of switch on all breakers and

to

15A

continuous rating

of

#16 wire on

draw

out

breakers.

:35

Courtesy of NationalSwitchgear.com

Power

SECTION

9 Electrical Characteristics

()t1.e~·g~~;n;9

~f~·

~~·0:

CJD

n

.f.7:

F:::J~

---·~---·-·---'---~~---···-----~-------

i)~Vi18~'/.'.'.~~~Hl\9

~4n~\.ry1(J.;::·

RAll1g-t:

28

:2b

DC

7'0

250

DC

140

70 60 59

120

60

95

120 50

95

60

140

280 1.0

132

127 12.3

127 7.6

8.:'l

4.5

2.0

1.0

10.8 Pickup at 85%

of

6.7 Nominal Control Voltage,

~runaa~1

~:;<e;;:

..

~~·f1

Op·i"ii1

r;~"'"·""~

~"ifi

38

.19

.i9

.oa

.08

.04 .04

N/A

.66 .24

.75 .25

208

60

175 220 3.2

.51

.17

-----1------1-----+-----1------!'------l

Dropout

at30%-60%

of

1------1------

-----1------1-------4-----4------11---2-._6_--1

Nominal Control Voltage

1------1------

208 50 175 220 3.8

3.1

.30 .10

240

60

190 254 3.9 3.4 .37 .12

240 50 190 254 4.7

4.1

.34

.11

240

40

190 254 5.8

5.1

N/A

380 50 315 410 2.9 2.6

.22

.08

480

60

380 508 3.4

3.1

.23 .08

480 50 380 508 7.5 7.3 .17 .06

575

60

475 625 2.8 2.5

.16

.06

575 50 475 625

5.1

4.7 .14 .06

SECTION

9

·-

Electrical Characteristics

-:

?!'.j\/

------.-

2GG\/

120\/

1201/

50

4fi0

·'5 7.15 33 .316

208V

60 1450

64

.825

208V

50 1450 300 25.4 146 .825

240V

60 1450 300 25.4 100 .930

240V

50 1450 300 25.4 146 1.27

380V 50

N/A

64

370 3.17

480V

60

N/A

64 370 4.10

480V

50

N/A N/A

32 580 5.10

575V 60

N/A

100 580 5.85

575V

50

N/A N/A

64

918 8.00

37

Courtesy of NationalSwitchgear.com

Power ers

1;'";(

~

2".

0

'l.J

,.,

...

~

...

::E

I=

38

MUL

TA.ES

OF

CU!iREi\ff

SETTiiliG,

C

Hm

'Ji~

;,W

,.

20

10

•

'

..

-'

J;J

-~

.§

1

.~

.':;'.!

~

=~

q !\

t:l

MU!.'ll'!l'!Y-1'

Of

lll'ifA!<:fl<

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MUL

T!l'lES

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CIJRRE!\lT SENSOR RATING

OR

TAI'

SETTING,")("

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oo

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:,i-;;.;o;.;;-;.;T'-;~7"-11-1

-~

~

...

.03

.02

Jmtantaneou•

Pickup Httting: LS, 2.0, 2.5, 3.0, 4.0, 6.0, 8.0,

and

10.0 multiples

of

sensor current

tap

setting

or

sensor rating

for

150

amperes

thru

3200

amperes

semors

Pickup

uitting;

1.5, 2.0, 2.5, 3.0, 4.0,

5.0,

7.0,

ond

9.0

multiples

of

sensor

top

setting

or

rating

for

4000

omperes

sen;or.

.1

.a .a

1 2 3 4 s a 1 a o10 20

MULTIPLES

OF

INSTANTANEOUS

PICKUP

GEIHRAl

fl

ELECTRIC

J

·-

lOW·VOl

TAGE

POWER

CIRCUIT

BREAKERS

TYPE

AKR

INSULATED-CASE

CIRCUIT

BREAKERS

TYPE

TP\I,

THV,

TCV,

THCV,

TDV,

THD\I

MOLDED-CASE

CIRCUIT

BREAKERS

TYPES

T.J9V,

THJ9V,

TK9V,

THK.9\1,

TlC9V

All

with

MicroVersaTrip®

long-time-delay,

Siu:>rt-tirr;e

delay,

L GES-6199E

---------------

Programmer

Adjustments

X=

Current

Sensor

lap

Selling

01

Rating

Currunl S..n1or

TopG

(AmP"'rn•)

LVPCB

AK-25

70/100/150/225

or

200/300/400/600

100/150/?25/300

or

300/400/600/800

or

61J()l800/l200/1600

1~KRT·SO

800/

1200/

1600/2000

AKR·75

1200/1600/2000/3200

A)(R.

)00

1600/2000/3000/4000

(ll"'3nl

!ocno()l Tapa

(AmP"""")

ICCll

800

EnveloP"

400/200.600/300,800/4(l(l

1600

Envelope

000/400,

\000/500,

1200/600,

1600/

!000

2000

[nvelopo

2000/

1200

2500

Env,.lopa

600/300,800/<100.

1000/500,

1200/600,

1600/

1000

1000/1200,

2500/HIOO

3000

Envelo~

3000/2400

~~~~~""%:.~~o~.~~ti

5

1~~~':Jo~v:c:bil

4000

fov

11

1"P'"

~000/3000

AP::R·SO

300,

400,

600.

BOO.

1200,

I

600

AKRT-50

800,

1200.

1600.

2000

Fi"llld Curr

..

nl

S..noor !i:oting• (Arnpcw9•)

AP::il·75

\200,

1600,

2000,

3200

KO:I

o<>d

MCCll

AKR-100

1600,

2000,

:moo,

...WO

1.50.200,300,400,500,600,800,

lOOO

;

200,

i&00,2000,2S00,3000,4VOO

Vc>ltol)<>

RGtinlil:

600

Volt., oc.

50

rhrough

400

HMh

(•...,

coul!on

"'

ro9ht)

(JJOd

~n$1rolntaneoa>1$

Time-l<:a.urrent

Curt1~s

(Curves

apply

at

50/

400

Hertz

and

from

-20C

to

+55C breaker ombient

or

-20C

to

+

70C

programmer

.ambient)

·-------

Long

fime

Deloy

Unit

Current

Se/tings (C):

0.50, 0.60,

0.70,

0.80, 0.85,

0.90,

0.95

and

1.00

m•Jltiples

of

current

sensor

top

setting

or

rating

(X). Pickup:

0.8, 0.9,

1.0,

1.1

multiples

of

the

current setting (C). Long

lime

pickup fi1rnd

ot

1.1

C

when

the

odiust.:ible unit

is

omitted.

Deloy

Bonds:

1,

2, 3

and

4.

Short

limo

c.Hoy

Unit

Pkkup

5e\lings.

1-5,

2.0,

L.':i,

3.0, 4.0,

5.0, 7.0, ond

9.0

multip~

of

current W!"ing (C).

Daloy

ikmch:

MIN,

INT,

MAX; l

l'l"'Constanl.

lnM<1ntan<K1Ua

A.dj1ntm@nlil;

SM!

Curv~

above.

NOT!::

Operation

above

60

Hert:i:

required

continurJus current

deroting

of

the circuit brerJker

for

thermol

roo~om.

CAUTION:

60-Hert:l

~hort-drn,it

rnt;ng~

rk>

rint

"r'f'I\'

rit fr"-

quend(;S

over

6!:i

HBrtz.

9.fM

(5M)

GENERAL

ELECTRIC

CO.'

CONSrnUCTION EQUiPMtNT

t!USIHE~,s

OP!'kAll01~$,

PLAINVILLE, CONN. 06062

...

39

Courtesy of NationalSwitchgear.com

GE AKR-30S User manual

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