GE AKR-4-50, AKR-4-30, AKR-4-50H, AKR-5-50, AKRT-4-50 Maintenance Manual Supplement

MAINTENANCE

(SUPPLEMENT)

MANUAL

(Supplement

GEI-86134D

to GEK-731

0)

POWENCINCuIT

TYPE

This manual when used in conjunction with Publication

tenance

tenance Table

1.

Manual

instructions on

for AKR-3/3A-50

the AKR breaker models

AKRU-3A-50

and

AKR

breakers)

and trip

GEK-7310

provides

devices

BNEAKENS

(Main-

main-

listed in

Frame

Size (Amp)

800

1600

2000

*

Integrally

-

Breaker

Stationarv

AKR-4-30, AKR-5-30, 30H

AKR-4-50, AKR-5-50,

AKRT-4-50

AKRT.5-50

fused

30H

50H 50H

types

IAB]T I

Type & Mounting

Drawout

AKR-4A-30, AKR-5A-30.

AKRU-4A-30* AKRU-5A-30*

AKR-4A-50, AKR-5A-50.

AKRU-4A'-50*

AKRU-5A-50* AKRT-4A-50 AKRT-5A-50 X

Trip Device

ECS

3OH

30H

50H 50H

Type

ssr

X

x

X

x

GENERAL

@

ETECTRIC

Introduction

CONTENTS

Constructional Diff

erences.

.

Breaker Ratings

Drawout Breaker Interchangeability

Breaker

Maintenance

. .

Precautions

Manual Handle

Adjustment

ContactMaintenance. . . .

Contact

Adjustment:

AKR.3O,

AKR-50,

-30H,

-50H,

AKRU-30

AKRU-50

.

AKRT-50

Contact Replacement:

AKR-30,

-30H,

AKRU-30

.

AKR-50, -50H, AKRU-50, AKRT-50. .

FusedBreakersAKRu-30,

-50

......

FuseSizesandMountinC....

Special

Open

Type SST

2500A

Fuse

Overcurrent

Fuse.

Lockout Device 12

Trip Device t4

Components 14

TripCharacteristies ......16

Troubleshooting. 77

Test Set TAK-TS1.

SST

False Tripping

Replacement of

(Ground

Current

Flux Shift Trip Device

Cabling Ground

Diagrams. 22

Fault Defeat

. .

.

Fault)

Sensors 19

Cable

. .

6 o 6

o

7

I

8

10

10 10 72

18 19

20

23

Type ECS

Overcurrent

Components TripCharacteristics .,,,..25

Cabling

ECS

& SST Time-Current

fhese inslruclions do nol

with instollolion,

lhe purchoser's purposes,

for

operolion

purporl

lo

oll

cover

or moinlenonce.

lhe

moller should 6e referred lo lhe

detoils or voriations in

Should further informolion

Trip Device 24

24

Diagram 26

Curves

eguipmenl

be desired or should

Generol Eleclric Compony.

nor to provide for

every

porliculor problems

27

possrble

conlngency lo be mel in conneclion

orue whrch

nol covered

ore

sufticienlly

Power Circuit

Breokers,

GEI-86134

MAINTENANCE

LOW.VOLTAGE

INTRODUCTION

The data in this supplement

800A

oreakers not coveredby the

maintenance manual

formation

devices

1600A frame AKR-50 design.

c i-f ic const ructional di-f

basic AKR-50 framework,

devices Except

the

Accordingly,

now

new types.

the

to that

to the

AKR-30 and

the

on

also is included.

new

The

breaker models

are substantially

for the

external

in

scope

descriptive

new models.

Hx W xD dimensions

a majority

publication

Therefore, to

of this supplement

or otherwise discussed

continue to

erational

employ

information source.

the

2000A

existing

(publication

new

ECS and SST solid-state

f

rence

e

mechanism

common

800A

frame

of the

GEK-7310 applies

avoidneedless repetition,

and instructional material

Unless

herein,

GEK-73i0 as

MANUAT

SUPPLEMENT

POWER CIRCUIT BREAKERS

TYPES AKR/AKRU.3OI50, AKRT.sO PER TABLE

pertains

AKRT-5O

GEK-7310).

derivatives

are

Apart f rom the

s identi-f ied bel

primary

AKR-50

is

confined

noted

the user

the

to

the new

f rame

AKR/AKRU-50

In-

trip

the

of

spe-

the

ow,

and accessory

to all versions.

details,

stud

are identical.

in-formation

equally to the

principally

unique

to the contrary,

should

general.

op-

AKR-30H.

cauons

a.

b. c.

d.

ln rne rollowlng

quenchers.

Arc

Closing

insulation

Extra Mounts one

for

total

a

ture is

NOTE:

AKR-30,

qttencher

red.

Same as

springs.

additional

four:

of

same as

To

uisibly disti.ngtdslt i,t

tlte clositzg springs and at,c

couers

I

the

AKR-30

areas:

sha-ft flyweights.

on

stationary main

otherwise

AKR-30.

of

See Fie.

tlte 30H are colored

except for

the

contact struc-

6.

ft,ont

modifi-

contact

tlte

Complementing

supplernent

pand

and update

where

operating

tion

appropriate.

handle

of the AKRU-5O

includes

the

above

additional

existing

Examples

adjustment

minimum

to 450A.

CONSTRUCTIONAL

features

The

AKRT

are

refer to

AKR-30.

a.

b.

c.

breakersfromthe

listed

below.

"Renewal

entirely

An

employs three

arcingand onemovablecontact

Primary studs

poie.

Two

of

See Fig. 1.

additional opening springs,

the

main shaft.

which distinguish

parent

For

detailed

a

Parts Bulletin"

new contact structure.

stationary mains, two

carry four disconnect fingers

See Fig. 4.

"new"

information to

GEK-7310

are revision

procedure

fuse

DIFFERENCES

AKR-50

parts

GEF-452?.

arm. See Fig.

material,

subject-matter

and reduc-

size from 8004.

the

new

frame

comparison,

Each stationary

one

at

this

ex-

of the

AKR/

size

pole

per

each end

5.

Fig, 1.

Rea?'

uiew

AKR-50

of

breaker

GEI-86134,

Power

Circuit

Breokers

AKR-5OH.

?ffiEs

springs

closing

the

attaine$-by

and

springs

AKR-30H.

AKRT-50.

AEF-:$;-

a.

New

and larger

contact

b.

Stationary otherwise

to the

AKR-50.

An

added

A

M

o dif i

arms

the

AKR-50

currry

20004

cations

upper

and

main

stationary

See

with

extended

special

arc

insulation.

the

same

extension

ar e

:

stud

pivot

block.

contacts

Frame

Size

(Amperes)

Figs.

increased

contacts

g

short

quenchers, euencher

red

color

the

of

1600A

assembly,

from

are

and 9.

Breal<er

Type

circuit

closing

tops

and

used

frame

movable

6 to

identicai

TABI.T

BREAKTR

Rated

Maximum Voltage

(60H2

--

AKR

800,

on

present of the

carries

current.sensor

trip

device

EXAMPLE:

sensor

g;

Short

voltage..

upon

an instantaneous

2

RAIIIIGS

3{

(kA

Instantaneous

ac)

BREAKER

breakers

1600

and

the

maximum

respective

a specificrating

€rmpere

with

which

An

tap

set

on

cir

cuit

ratings

OTZ

whether

Short

RMS Sym)

V

!

the

Circuit

with Trip

RATINGS

a.reavailable

2000

amperes.

continuous

frames.

whichis

rating(or

it

is

AKR-5A-3O

1004

is rated

vary

systems

overcurrent

trip

element.

Rating

Without

Instantaneous

Trip

inthree

These

current

However,

determined

tap

equipped.

breaker

100A.

with

the

they

are

trip

See

frame

sizes

values

capability

each

breaker

by

setting)

applied

with

system

of tt"

SST

atso Oependent

device

lante

contains

Z.

re_

the

800

1600

2000

800

1600

AKR-30

AKR-3OH

AKR-50

AKR-5OH

AKRT.SO

AKRU-30

AKRU

-50

508

254

635

508

254

635

508

254

635

508

254

635

508

254

600

635

42

50

65

200

42

50

65

50

65 65

30

42

42 42 50

30

42 42 42

42 50 50

50

65

42

50 50

200

Power Circuil

Breakers,

GEI-86134

DRAWOUT

INTERCHANGEABILITY

general,

In

rating are

and

compartments

sizes are

the wrong

suitable breaker

typical

jection wrong

rejection

type breaker

drarvout

interchangeable

drawout breakers

;

interchangeable.

not

breaker

type

"rejection

its compartment.

and

in the

the bracket and

breaker

of

cuit ratings

onlv:

.f r(

from seating

There

the same

ilil

ill

is one

frame

may be interchanged

]l

ill ltl ilt lll

T-n-

AKR.30

o

sa1

'il_

ttt ltl

ilr

tl

|ll

ll| ilT

uu

AKR-3OH

(?

n^<

il ltl

lrlr-

tl atl tt ttl

T-T

AKRU.30

(c,

breakers

into a

hardware"

bracket

drawout

is inserted

do not mate,

itself

exception

size having

ffihffi

z

UJ

F-

F2

<x

o

n

v

II TI

ffil--c I

+-il1'-' i"oJ'JT,rn

T----l;l*A

BREAKER

the same

of

their equipment

in

diJf er

of

prevent inserting

To

drawout

is a-ffixed

Figure

which aligns

(Fig.

rail

into

a

the drawout

into

to the above.

different short

in

-

AKRU

50

(6)

type

fr

ent

ame

compartment,

to each

4 shows a

with a

3). When

compartment

preventing the

one

RE.JECTION

PINS IN SLIDE

LS

RAI

REJECTION

BRACKETS

MOUNTED BREAK ER

J

re-

the

rails.

Breakers

cir-

direction

R IGHT

SLIDE RAIL

ON

neuecrroru

PosrrroNs

a.

An

AKR-3OH

compartment.

b.

An AKR-50H

compartment.

rejection

The

and b.

a.

Figure

combinations

tended breaker

2

its rejection

positions rail(s) . Referring

the

each

single

fused breakers

nonfused breakers

as a

type(s) ment.

AKRT.50

@

(A,

AKR-30H

slide rail.

in the right side

guide

that will be accepted

PLAN VIEWS

-

can be

can be inserted into

hardware

shows

employed.

type,

(or

B or C

to

50H types employtwopins, one

and

inserted into

prevents

the rejection

As determined by its in-

drawout c

each

pins)

installed in one of

the

ompartment

front-to-rear) along

5, note that only

Views

2 and

The other breaker

AKRU-3O ard 50

TaiL

use a single bracket,

carry two brackets. Use

determining the

for

-

KrtJn I sluE

by any

proper

given

an

AKR-30

an

AKR-50

converse

and bracket

has

three

the

slide

types use a

whereas

Fig.

breaker

compart-

ffi

IN

of

in

a-ll

2

Fig.

2. Non-interchangeabi,lity

hardware arrangements compartments

AKR

-30/s0H/50/50H,

AKRU-30/50

breaker Types

for

AKRT

(rej

ec ti.on)

i.n drawout

-50

and

Fig. 3. Slide rail rejection

pi.n

locations

GEI-86134,

Power

Circuil Breokers

BREAKER MAINTENANCE

SAFETY PRECAUTIONS

BEFORE INSPECTING

ANY XMINTENANCE WORK

BREAKER, I7: MUST BE DISCONNECTED

FROM

POWER AND CONTROL, AND BE IN

THE

MANUAT

On

springs may be charged

gree

clockwise handle

strokes

procedures

stroke method. By

operation

Referring

handle adjustment is

The length of

double-ended

mid-stud can be

When looking

wrench clockwise

motion

degrees.

wrench stroke imparts 15 degrees movement. best setting is approximately mid-range.

ALL VOLTAGE

'IOPEN"

HANDTE ADJUST'NENT

manually

lesser

of

should

is

assured.

shortens it. The

In

POSITION,

operate d AKR

-

swing. The following

be

so

to Fig.

this link is

stud in its center.

engaged by an open-end wrench.

down

on the breaker, turning the

lengthens

the

confined space available,

stroke

performed

doing, proper

13

made

OR BEGINNING

ON THE

SOURCES, BOTH

bre ake rs, the closin

ei.ther by a single

to four

or up

adjustment

using the single-

multi-stroke

of GEK-?310,

via adjustable

controlled

the

link.

range

of adjustment

the manual

by turning

A hex

section in

The opposite

135

multiple

link

is 300

de-

(16).

each

The

link

If the

extend the closing spring

center.

is too long, the handle

this

In

to complete the

then

be closed and opened

shortening of the link.

link

If the

possible.

not charge the springs.

is too short,

However, more than

CONTACT MAINTENANCE

Breakers subjected to frequent

high currents may

g

of their contacts.

need

of replacenrent

the mass

of

light

or

cate

loss

When contacts are replaced,

justed

developed

tacts

a

when the

the

"wipe"

throughwhich

breaker closes.

contact

of

is open,

breaker

greater

of the contacttip material. Roughening

pitting

of

of ability

to ensure that the

between

breaker is

adjustment.

the stationarycontacts

on a stationary

the position

and

is closed. The

because

imparts a sliding

tacts.

Fig. 4.

event, use the maintenance

spring charging.

AKR-SA-30

1.

Opening

2.

Rejection

enough

for

preparatory

one-stroke

spring

bracket

stroke cannot

it to

The breaker can

to further

charging

one stroke will

interruption

eventually require

generalrule

The

the loss

is

the contact

to carry

surface does not

or interrupt

proper

movable

the

closed.

"Wipe"

It is measured

contact when the

of the same point

actual wiping motion

the contacts

or

"scrubbing"

over-travel.

ofone-haLf or more

a:nount

and

replacement

for

determining

they

must be ad-

of

stahonary

This

is called

the distance

is

move when

between

action to the

the

when the

"Wiping"

bt,eaher

go

over

handle

indi-

current.

force

con-

the

point

breaker

is

con-

is

of

is

Power

Circuil Breokers,

GEI-86134

Movable contact arm

1.

2. Stationary

Stationary arcing

3.

4.

Contact

main contact

contact

spring

5. Arc runner

Fig.

The wipe adjustment influence s

fer during

the

of

arc is its

the intermediate contacts the

arc runner andfinallyto the arcquencher

dissipated

it is

that contact wipe be

normal maintenance

CAUTION:

FOLLOWING

AND

ICALLY

SPI1/NG

SIIAFT.

,,SLOW-CLOSEDI'

NANCE HANDLE.

CONTACT

The

frame

ficantly

pole

against five as shown

AKR

consists

AKR/AKRU-S} contact

5.

(arc quencher

interruption of

forced

andextinguished.

inspections.

BEFORE

remoued)

fault

currents

sequential

to

the arcing contacts to

checked

DOING ANY OF THE

CONTACT ADJUSTMENT

REPLACEMBNT

DISCONNECT THE CLOSING

WORK,

FROM THE MECHANISM

BREAKER CAN

THE

USING

ADJUSITilENT Types

contact

from

in Fig. 5.

arrangement

and AKRU-3O

that

of the AKR-50

of a

single

stationary

contacts,

Proceedingfrom

movable

THE

ond

AKRU-3O

of

breakers dilfers

proper

Itis recommended

periodically during

AKR-3O, 3OH

the 800

frame size.

contact arm

arranged vertically

structure

arc trans

Transfer'

.

"

movement from

where

MECHAN-

CAM

NOW BE

MAINTE-

ampere

signi-

Each

acting

top to

bottom,

1. Movable

2. Stationary

Stationary arcing

3.

Fig.

-

the first two contacts serve as

'

the bottom

and

intermediate

The contact assembly

employs

adds a See

plicable

the

fourth stationarv main

Fig.

following

The

to all

1. Open

2.

Arrange

scribed

on

3. Using

slow-close the

4.

Se1ect one

gage,

measure the

pivot

its

adjust wipe

the

adjustment stud.

5. Repeat this Trip the

6.

AKR-S1H contact structure

6.

three

are

contacts.

AKR/AKRU-30

same

6.

wipe

AKR-30

the breaker, remove

the

page

stud as shown

gap

breaker for

15

of

the

ratcheting maintenance handle,

breaker.

pole

and,

gap

to

0.060 *

procedure

breaker.

contact

the mains.

for

adjustment

types:

GEK-?310.

using a flat or wire feeler

between

in Fig.

arm

main

contact

the

arcing

the AKR-30H

configuration,

contact at the

procedure

arc

slow-closing

the top contact

As necessary,

?.

contacts

There are no

breaker

bottom.

quenchers.

0.020 inch by turning the

the other two

on

but

is

ap-

as de-

and

poles.

GEI-86134,

Power Circuit

Breokers

ADJUST

0.060"

WITH

PIVOT

STUD

STATIONARY CONTACT

Fig.

7. AKR-30

top

CONTACT ADJUSTMENT Types AKR-SO, sOH

Use the

justment:

1.

follorving procedure

Open the breaker,

wipe

of breaker

adjustment

qnd

remove arc

2. Arrange the breaker forslow-closing,

page

scribed on

Select one

3.

sheet or

myl.ar,

strip of

over

contacts.

wide and must

contacts from making contact closed.

4.

Using

slow-close the breaker with the insulation held in

place.

"over-hangs"

Examine

5. Atiach

between

stud

main

the upper

Facing the

6.

clockwise until the checker

contacts

fits the hex section on

?. Turn

contacts

clockwise 270

just

From this

8.

Trip the breaker,

9.

15

of

GEK-7310.

pole

tough

the

stationary arcing and

This strip

prevent

the

of

breakerand

insulating

should be about

the

arcing and intermediate

the ratcheting maintenance

the

insulation to make

the intermediate

below

continuity

a

have

the

stud

touch.

degrees.

and

breaker,

point,

checker

lower stud.

turn

parted. An

the

stud.

counterclockwiseuntil

advance the stud

This will be

remove the insulating strips.

GAP TO

o.oeo'

t.

BREAKER

AKRU-SO

toper{orm

material,

when

CLOSED

uieoo

-

quenchers.

the

from

wipe ad-

as de-

place

such

intermediate

two

inches

breaker is

handle,

a

thin

sure it

contacts

(bell-set

the wipe adjustment

indicates

open-end

.

light)

or

that the

wrench

the main

counter-

4-1/2 flats.

CONTACT

The contact structure of this 2000A

conceptually identical to the

that it

stead of six.

stud

block

9.

and

The

to

a

threaded

ADJUST|YIENT

employs

assembly,

are

two movable

eight stationary main contacts in-

Constructionally,

movable

unique to the

metal driving

screws

and

link. This arrangement omits

wipe

adjustment

frames.

-50

the

driving link

then rotating it

the

On wipe exists if tionary main contacts have moved

stops.

removing the

verifying

and

are

"lifted

appear

1.

as

2.

scribed on

3.

detach the drivinE

and

tact

4.

sulating

5.

turns.

sary

contact

AKRT-50

This

necessary,

Open

Arrange the breaker for

Selecting one

arms.

Screw

link.

Back out

Exceed this by whatever

properlypositionthe

to

arms.

6. Install the coupling ?.

Using

breaker

contacts move

dition is

move the an additional half

wipe.

and observe

not

coupling

8.

Reassemble,

stud

Instead,

from the

respect to the insulating

with

closed

on a

,

condition can be checked visually by

quenchers,

arc

that

all

their

off"

stops.

proceed

the breaker.

page

15 of

pole,

the driving link completely into the

the driving

the maintenance handle,

from

away

achieved, open the

turn.

reclose thebreaker

lype

AKRT-50

breaker

1600A

AKR-50

however,

the upper

contact arms and

AKRT-50.

contact arms are

link whose

directly

the

provided

wipe is

movable contact

proper

the

on

adjusted

breaker,

See Figs.

pin-coupled

opposite

the insulating

into

wrench-operated

the

AKR-30

by detaching

arms and

amount of

of the sta-

aII

from their

away

closing the breaker

eightstationary

Should wipe adjustment

follows:

as

GEK-7310.

dri-ft

from the movable con-

link

tink two

main

slow-closing as

the

out

coupling

and one-half

amount

is neces-

linkwithin the movable

and retainer

that

eight stationary main

all

their stops.

breaker,

and back out the driving

rings.

slow-close the

this

If

againre-

and

is

except

pivot

8

end is

and

link.

contact

contacts

de-

in-

con-

link

recheck

Repeatthe above

10.

poles.

8

procedure

on

the

other

two

9.

poles.

Repeat

the

above

procedure

on

the

other two

Power

Circuif

Breokers,

GEI-86134

Fi,g.

7

AKRT-5)

8.

contact

structure

Movable

1.

StationarY

2.

3. Stationary

4. StationarY

5. Driving

Insulating

6.

I 7. CouPling

contact

arm

contact

main intermediate arcing

link

contact

Fig.

AKRT-|7

9.

Mouable

contact

piuot

DRIVING

LINK

bloch

GEI-86134, Power Circvil Breokers

CONTACT

The

AKR-30

fashion main however, runner

Replacement of

is

accomplished

AKR-50

coupling

CONTACT

Referring

tacts

(5)

andthe

bling, make sure that the

ends of

',vashers

screws are

Intermediate

moved

pieces

serting a spring

puII

Replace the contact by holding it in

end behind

engaging

REPIACEIVIENf Types

stationary contacts

breaker

to that

frames

employed for the intermediate

stationary contacts

necessary

it is

AKR-30, 3OH

ond

AKRU-3O

(arcing

and

are replaced in

the AKR-50.

of

to first remove the

by removing its three holding screws.

the

single movable

in

like marurer

breakers, i.e., pin, pivot pin,

REPTACEMENT Types AKR-SO,

to

(L)

are released by removing the

Fig. 17 of

arcingcontact

remove

etc.,

AKRU-50

pivot (6).

employed for the

described

as

GEK-?310,

insulating spacers on

the arcing

(B)

replaced.

contact

under the

(2)

disconnecting their

by

on the

springs

puller.

the spring and lift it off

the

contact stop) while extending and

the

spring on

pin (7)

and the insulating

lower arc runner

main

and

contacts

springs. The end

(9)

have

While holding the contact,

the

small hole for

a

the

end of

end. A suitable

outer

mains)of the

identical

and

do

To

so,

arc

contact

replace

and

50H,

ond

AKRT-SO

arcing

arc

When reassem-

(3)

arm

the

below.

con-

runner

the

fastening

re-

are

in-

the

contact.

position

(inner

puller

end of a

by drifting

sulated coupling

are

tainer

can be fashioned

length

The

two movable contact

needed to

on

of. 1/76-tnch diameter

out

remove and

the

end of

(10)

(11).

the pin.

by forming

arms

connecting

Right angle tru-arc pliers

replace the

Next, remove the fastening

pivot

springs

and

from the

replacing the arms ensure that

and washers

Tighten

AKRU-3O ond

the

Except

for

returned totheir

are

two

bolts in the contact

-50 FUSED BREAKERS

the

open

fuse

integrally-mounted fuses

AKRU-30 and

fused

AKR-30

devices

Fuse Sizes

are

ond Mounting

Table 3 lists

for thesebreakers.

as shown

which has

fuse

Class J

mounting hole

in

a

tang has

breakers

-50

and

the

-50

same

for

the range

TheClass L

Fig. 10.

two

holes sized

per

mounting

targ. The 300, 350

single

fuses rated

models.

both types.

Other

300 thru 6004.

sizes require copper adapter bars

pivot

all spacers, springs

lockout device

on the

identical to the

are

fuse

of

than the

hole

for

one-half

a hook

steel

(4)

are removed

them to

on the

wire.

the in-

tru-arc

screws, washers,

below. When

original

arm

position.

pivot.

and

upper studs,

un-

Overcurrent

sizes

fuses

are

800A

per

tang, each

inch bolts.

per

Fig.

trip

available

mounted

size,

have

one

400A

and

11.

re-

the

L

10

NEMA

Fuse

Class

600v

60

Hz

J

L

Special

xMounting

GT

Breaker

Type

AKRU.

-5dl5o--

ii

L 2500

adapter

required

CIT

IABIE

TOR ATRU BREAI(ERS

rusTS

Ampere

Rating

300x

3 50*

400x

450

500

6no

800 1000 1200

1600

2000

-

see Fig.

3

Cat.

No.

GFSB3OO

350

400

450

500

600 800

.

1000 1200 1600 2000

GFgF2SOOAK

11

Melting

Tine-

current

Curves

8004

GES

I I

I

V

GES-8005

I I I

I

V

r.838?832

IH

Ttbicat

on'AXnU-TT

mounting

and

fm

-50

Power

ttLttfuse

class

breakers

Circuit

Breokers,

GEI-86134

Fip.

"

11.

Mounting

on

fuses

300,

for

AKRU-3?

and

350

breaksrs

400A

Cl'ass

J

11

GEI-86134,

Power

Circuit Breokers

la

1.

Special

2.

Disconnect

3.

Heat Sink

4.

Upper Barrier

5.

Primary

25004

Fuse

Key

Disconnect

Speciol 250OA

fuse

This

provides

Fuse

for

AKRU-SO

a meltingtime-current

acteristic that coordinates

Compared

fuse, the

its tangs

achieve

special

the

on

unique

fuses (Refer

1.

from

the two keys them upward

pull

tang.

physically

special

fuse

with a

is

are specially

the

required

primary

outboard tang

mounting

the following

to Fig.

Remove

the fuse

the disconnect assembly

12):

the

taag,

(2)

and

pole-to-pole

di

onnect assembly m

sc

of the fuse.

provisions,

procedure

primary

accomplishedby

their holding screw and

via

out.

After

NOTE: This remoual

disconnectts

Remove

2.

clamping

the upper

barrier

Fi.g. 12.

AKRU-|0

breaker with

char-

with 16004. trip devices.

25004 NEMA Class L

more

compact

configured

Considering their

when

should

disconnect

(shorter)

and offset

fuse

spacing; a

ounts

replacing

be

adhered

assembly

direcUy

these

first loosening

pulling

the keys

off

does

force

the

not disturb

adjustment,

(4)

.

are

end of

removed,

the fuse

the

to

;

special

4.

5.

6.

assembly

the

of

CAUTION:

FUSE

VIEW) OF THE BREAKER, NOTE PAR-

TICUIARLY THAT THIS

25004

Remove the heat Remove the fuse.

[rstall the

fuse

new fuse

procedure.

fuse

and heat sirk are clean.

WHEN REPIACING THE

IN

THE LET-T POLE

(3).

sink

by reversing the dis-

Ensure that the mating

FUSE

MOUNTED DIFFERENTLY THAN THE

OTHER TWO FUS,DS. AS SHOWN

FIG. 14,

IS ROTATED 180 DEGREES ABOT]T

AXIS

SO

POSITIONED BENEATH THE BREAKER

STUD. fUtS

RESPECT

FIG. 13,

DOES

THE

SO THAT

NOT ALTER

PRIMARY

THIS

FOR

PHASE THE FUSE

THAT ITS INBOARD

rAtr,C tS OFFSET

TO THE

OPPOSITE

ROTATING

THE

POSITION

DISCONNECT.

THE FUSE

END

(FRONT

I7:S

TANG

WITH

(SEE

OF

faces

15

IN

IS

3 . Detach the inboard end

the

ing

socket with

turo

1/2 inch

a short extension

13 bolts. A

-

the

of

will

be required.

fuse

t2

by remov-

ratchet

and

Fuse Lockout Device

Open

Refer to

GEK-7310,

page

31.

Power

Chcui|

Breokers, GEI-86134

13.

Fi.g.

FUSE TANGS POSITIONED

Mounti.ngfor

AKRU-50

FRONT OF

ON TOP

breaksr

speci.al

BREAKER

2500Afuse

EE-W@I'

FUSE IS ROTATED

POSITION

TO

BENEATH

BREAKER

1.

2.

HEAT

3.

PRIMARY

ASSEMBLY

ISOO

TANG

BREAKER STUD

STUD

SINK

DISCONNECT

TANG

BOLT

IN USE

i

os

HOLES

PRIMARY DISCONNECT ASSEMBLY

MOUNTS

Fig. 14.

Plan

25004

25OOA. FUSE

CAT. NO.

GFgF25OO

DIRECTLY

uiew of

fuse

ON OUTBOARD

AKRU-S1

tang

osi)

AK

positi.ons

(SEE

FIG.I3

FUSE TANG

breahsr

)

showing

13

GEI-86134,

Power Circuit

Breqkers

TYPE

powered

diagram

it

bas-is-T6T-6T6?6frrGnt

energ'y necessary to

electronic circuitry for

Their

(set-points)

ing

equipped rvith various combinations

Short Time, Instantaneous

elements. See Table

settings

equipped

pop-out,

across

with

from

second for short

andinstantaneous elements)

fault.

SST

OVERCURRENT

The

is

SST

trip

device

of Fig.

a

solid-state, direct-acting,

system.

16

and

the

comprises the following

Programmer

Unit

-

detection

trip

provides

the

the various trip

associated

the

on

pickup

located

are

application,

and

on

programmer

4

trip characteristics.

and

The

a

left

The latter is

programmer

SST

with trip indicators

mechanically-resettable

the top

ground

to

of

fault

right, the

programmer's

the

element

circuit

(actuated

omitted on

first is for

TRIP

Referring to the

photograph

individual

breaker.

timedelay

the lace

and

Ground Fault

for

available

units can

(targets).

employ three targets:

andthe

units

fault.

DEVICE

of Fig.

components:

the

comparison

delivers the

and

Contains

elements.

adjustments

plate.

units

Depend-

may

of Long Time,

ratings,

be optionally

plungers

These

Iocated

front.

overload, the

by the

short time

third for

without

self-

block

15,

the

be

trip

are

Units

ground qround

Fig. 15. SST Programmer unit

target

Each

element the neglecting

of any

being

operates

popped

trip element or

reclosed.

Current

senE5i-66II(ef)-EETch

inputs necessa-ry

nal

sensor has

Each

justment

of the

rating. See Fig.

The SST

principle

the

rent in the three tems)

On

trip

sensor on a

programmer

Iong as

add

SST's equipped with

signal

in

series

ground

there is no

pops

to trip the breaker.

target must

to reset does not

Sensors

four taps which

trip

18.

Ground

Fault trip

that the

conductors

to

zero unless

is developed

with

differentia-ltransformer mounted

unit.

Its

ground

l4

when its

out

reset by hand.

be

aJfectnormal

prevent

each

-

supplies

to operate

device's

instantaneous

ground

Ground

associated

the breaker

pole

mounts a

the

the trip

provide

continuous

element operates

(four

on

current exists.

Fault,

by connecting each

companion

a

secondary

current.

primary

output

After

However, operation

power

and

system.

field

ampere

vaLues of

4-wire

ground

the

winding

is zero so

trip

trip,

a

from

single

sig-

ad-

cur-

svs-

phase

in the

on

-

I

([$F$

r

I

)

Fig.

16.

SST Block

diagrant

-1

Power

a

1.. :"

,*"ii

Circuit

Breokers,

GEI-86134

1. Flux shift

2.

Allen-head

3. Stud

4.

Connector

Current Sensor

Trip

Screws

Device

Fig. 17. AKR-54-30 breaker with

the

Application

of

Grorurd

wire systems with neutral

former requires

sensor

(Fig.

an additional,

inserted in

19)

its secondary is connected

ground

winding on

See Fig.

electrical

an

ing taps. Therefore, when

phase

correspondingly

FIux Shift Trip

the

2?.

sensors,

This

duplicate

those

positioned.

differential

"fourth-wire"

the

of

on the

Device

-

grounded

the

to

phase

taps

neutral sensor

a

element

Fault

at

separately

neutral

fourth

a

on

the trans-

mounted

conductor;

primary

tralsformer.

neutral sensor

sensor,

changed on

are

includ-

the

must

low-energy, electro-

m@n receipt of a trip signal

from the

actuating

programmer

the trip

sha-tt.

trips the

unit,

See Fig.

breaker by

22.

4-

is

be

5.

Tap Terminal Board

6. Programmer

7.

Clamp

8.

Sensor

All

mounted

located

are

grammer

mounted ponents

disconnect

(Figs.

When

mounted in the

Bolt

SST

trip deuice

components except the

the

on

unit

the

on

interconnected

are

plugs,

25

and

used, the

switchgear.

automatically corurected

ary disconnect

Unit

Stud

circuitbreaker.

the

breaker's

the flux

and

breaker's

shown

as

26).

neutral sensor is

bus

drawout

In

blocks.

rl

I

i

neutral sensor

The

frame.

back

shift trip device

front

frame.

by

wiring

the cabling diagrams

on

cable compartment

or

construction, to the

breaker via second-

See Fig. 20.

phase

sensors

The

These

harness

separately

of

its output is

are

pro-

are

com-

and

the

15

GEI-86134,

Power

Circui|

Breokers

300

-

800

A

Fig.

Breaker

Type

AKR.30

AKR.5O

AKRT.SO

Pickup

o

Pickup

@

18. SST

Frrme

Size

(Amperes)

800

1600

2000

tolerance tolerance

phase

X.

-Sensor

100, 150,225,

300,400,600,

300,400,

600,800,

+

is

97o

+

is

Wo

sensor

Trip

Rating

in

Amperes

Tap

z Seneor t

(

mp"t"

\

Trps

-or-

600,800

-or-

1200, 1600

800, 1200,

1600,2000

(See

with

)

/

300

800

pages

tnp board

TAB1E

SSI IRIP CHARACTIRISTICS

SSf PROGRAMMER

Long

Time

ria<5(-t

(':ff")

.6,.7, .8,

.9, 1.0,

1.1(X)

28,29

@

and

Time

)

Delav

Band

(Seconds)

Maximum

Intermed.

Minimum

Time

detay shown

Time delay

30 for

applicable

@

22

10

4

shown

4

Short

Pickup

o.

(*:'l'i")

3,4,6,

(L)

6,

81 10

---or-

L.75,2,

2.25,2.5,

(L)

3,4

at

60@o of long

at lower

time-cunent

Fig. 19.

ADJUSTMET|T

Time

Delav

Band-@

(Seconds)

Maximum

0.35

Inrcrmed.

0.21

Minimum

0.095

time

limit

of band.

curves)

-

300

loo

SST

Neutral sensors

RANCE

fnstantaneous

Pickuo

@'

(':Tf*)

4,5,6,

10, 12

setting

(L)

8,

pickup

A

(Set

/

\

.2,.25,.3,

(6L),

Points)

,4, .5,.6,

.25,.3,.4,

GROIjND

Pickuo

-

1t\

g,/

Multipte\

of X

/

1.0,

.8,

(X)

1.2

.5, .6,

(X)

.7

.4, .5,

(X)

.6

at lower limit

FAULT

Time

Delav

Band-@

(Seconds)

0.30

Intermed.

0.165

Minimum

0.065

of

band.

16

Power

Circui|

IROUBTESHOOTING

malfunctioning

When

troubleshooting

in

and

AS:

power system

its

to

is

for abnormal

Breakers,

is suspected,

examine

the circuit

GEI-J6134

first

the

breaker

conditions

step

such

REAR

AKR

VIEW

-50

trip sha-ft.

its

TAPS

ADJUST

KNOBS

to

by

voltage

to over-

to

due

ON

circuit

the

from

the trip

either of

tests

on

test

proper response

Breaker

a)

currents

Breaker

b)

mechanical Inadvertent

c)

WARNING:

THE

tripping

or

remaining

CURRENT

PROGRAMMER

WHILE THE

CURRENT.

it has been

Once

-

BREAKEFI. MOUNTED

breaker test

device two

the set.

can beopenedand

position,

proper.

methods:

1.

Conduct

attention

Testing

high-current, single-phase

breaker using a

in

incipient

ground faults.

in

a

interference

trip

shunt

DO NOT

activations.

CHANGE

SENSOES

UNIT

BREAKER

established

closednormally

can be directed

performed

is

high current-low

trip-free state

along

Oft

SET

15 CARRYING

that the

Fig.

20. Neutral

blocks

sensor

EQUIPMENT.

MOUNTED

secondary

disconnect

NOTE: For

cinl

cormections mustbe

breakers equippedwith

single

-phase

transformer

"ground

the

by

(a)

fault't

breaker.

testing

series, or

(b)

Using the

sho?,m

as

test cable energizes windings

former

parallel

ary

output is always zero.

2.

portable

applicable

tion

Book

Test

page.

components

Test

Set

procedures

test

GEK-64454 and are

these single-phase

employedfor

Ground Fault. Any

i;nfut to the

will

output signal

This

two

Ground Fault Defeat

in

ground

generate

can

be nullified either

poles

Fig.

of the breaker in

28. This

of the differential

in a self-cancelling,

connection so that i.ts second-

the

of

Type TAK-TSI

a-re

tests, spe-

SST

differential

zmwanted

cn

which utill trip

Cable

special

pri.mary

the

all

trans

series-

system using

SST

(Fig.

21).

detailed in

summarized on the

Instruc-

-

The

t7

GEI-86134, Power

Circuit Breokers

Fig.

USING THE

The TAK-TSI

designed

acteristics and

various

the

Flux-Shift

in

addition,

phase

the

WARNING:

TEST SET TO THE BREAKER

VICE SYSTEM,

CIRCUIT BREAKER 15

DISCONNECTED

SOURCE. ON

RACK THE BREAKER TO ITS

NECTED POSITION. VERIFY I:HAT

BREAKER IS TRIPPED.

Either of

rrArt

-

SST TEST

sET

Test

Set

is

a

for field-checking the time-current char-

pickup

trip elements.

Trip

includes means for continuity

sensors.

BEFORE CONNECTING THE

It

Device

calibration

can to trip

ENSURE

FROM ITS POWER

DRAWOUT EQUIPMENT,

two test modes may

Programmer

Unit

be employed:

Only.

conduct@

from the

attached moved from

breaker. During test, the

to the

breaker

or

may

it.

SST/ECS test set,

21,

portable

verify

instrument

the

of

the ability of

SST's

the breaker

checking

DE-

TRIP

THAT THE

COMPLETELY

DISCON-

THE

These

unit

be completely re-

tests

disconnected

unit can remain

andr

are

cat. no.

CAUTION:

T//,RNESS CONNECTOR FROM

GRAMMER

/S

CURRENT.

TAK-TSI

NEVER

UNIT ON A BREAKER THAT

ENERGIZED

THIS

AND

WILL

THE CURRENT S.ANSORS,

DANGEROUS AND

AGES TO

scope:

Test

1.

Verify

pickup

on

rrBrt

calibration

2.

Verify operation of

programmer

Complete

-

DEVELOP.

the

time-current

the various trip

of

units so equipped.

Trip Device System. For these

tests,

the breaker

scope:

Test

1.

A11

"A"

vision

output veri-fy its

breaker.

does

test instructions

for

optionally switching the

to

activate

operation by

2.

Check

the event that

In

perform

not

connected

and

tests

phase

GEK-64454.

previously

the

Flux-Shift

sensor continuity.

component of the

any

within the

DISENGAGE THE

THE PRO-

CARRYING LOAD

OPEN-CIRCUIT

ALLOWING

DAMAGING VOLT-

characteristics

elements.

the

target indicators

SST

to

its

wirins

described,

programmer's

mounted

harness.

plus

Trip Device

physicaliy

limits

it should

tripping the

SST

prescribed

replaced.

be

and

on

pro-

and

system

in

18

Power

Circuit

Breakers,

GEI'86134

TRIPPING

FALSE

GROUND

When

equipped

FAULI

nuisance

with

p"onalte cause

slgnaf .

26, each

primary

indicated

As

phase

winding

lransformer.

circuits,

Ioad

to zero

add

current

This

sensors

sensor

one

If

rating or

ent

transformer

breaker.

sensor

signal.

trip

nuisanc

If

whose SST

satisfactory

the sensors

Set,

closely

breaker

and

have

can

Similarly,

the

and

e

components

performance

scrutinized. After

from all

- BREAKERS

tripping

the

Ground

is the existence

by the

sensor

Under

the currents

sum

the

di-ffers

wrong

programmer

tripping

is connected

the

on

no-fault

ground

no

will

same

from

tap setting),

produce

is encountered

have

their connections

and

power

Ground

be

electricaL

output

discontinuity

sources,

EQUIPPED

occurs

Fault

of a

cabling

conditions

in these

signal

zero

WITH

on

element,

trip

false

diagram

in series

differential

Fault

on

three

is developed.

i-t

only

breakers

"ground"

Fig.

of

with a

3-wire

windings

three

all

characteristics.

the others

(i.

the

sufficient

unit can cause

on any

previously demonstrated

the

via

TAK-TS1

disconnecting

differ-

e.,

dilferential

to trip

between

a

breal<er

should

the

any

false

Test

the

a

e) If

REPTACEMENT

be

Referring

current sensors is

condary

for

disconnect

continuity

neutral secondary

through to the

(terminals

(3)

the breal<er's

If

the

supply

sor must have

to the source.

(4)

Ensure carrying only ciated

(neutral

precedingstepsfail

the

Iem, then the

measured.

sors

are electrically

tap resistances

to

L and

source, then the neutral

that the

with the breaker's load current

not shared

sensor resistances should be

Since

OF CURRENT

Fig.

17,

accomplished as

block.

Also

from the breaker-mounted

discormect block

female harness connector

N).

lower

its

that

the

should

remova!

studs connect

LOAD

neutral

end connected

eonductor

neutral current

with other

toidenti-ty the

phase

identical,

closely agree.

SENSORS

loads).

neutral sen-

and

their

individuat

of

follows:

tap-to-

check

to

sen-

is

asso-

prob-

SST

a)

Check

type

b) Ensure

sensors

c)

Verify

sensors

that

(ampere

that the

are

that

meet

cated by

to

wire

d)

On Ground

COMMON,

loads, check that

erly connected

particular,

In

(1)

Verify

same rating sensors.

(2)

Check sensor

all

range).

phase

sensors

tap settings on all

identical.

the

harness

polarity

the

cabling

Fault

(see

that

the neutral

and

continuity

its equipment-mounted

ald

diagram, i.e., white

wire

black

breakers serving 4-wire

the neutral

cabling

tap

setting

between

the same

are

3-phase

connections

constraints

to

TAP.

sensor is

diagramFig.

sensor has

the

as

tlle neutral

to the

indi-

prop-

2?).

the

phase

se-

a) Disconnect

terminal

necessary.

the

breaker

b)

the rear

At

Allen

connector

Loosen

c)

stud

connector.

tap terminal

NOTE:

to adjacentaccessories,

be

necessary to

(8)

also.

holdi,ng bolts, accessible

the

breaker

the

breaker

board

head

(3)

the clamping

(5),

Unfastenthe terminal

base.

the

of

screws

from

Lift

board.

prouide

To

Do

more working

remoae the sensor stud

this

(see

Fig. 20).

harness from the tap

removing cable

breaker,

(2)

the contact

bolt

out

by remouing

remove

to

separate the

pivot

(7)

the

i,t

may sometimes

remove

and

sensor

clearance

its

the rear of

from

ties

board

the two

block.

and its

foar

as

from

stud

the

19

GEI-86134,

Power Circuit

BREAKER

I

\

CLOSED POSITION

Breqkers

\

/

ACTUATOR

Fig.

FLUX SHIFT TRIP DEVICE

mounting arrangement

The

illustrated in Figs. 22 and23.

actuator

located

is coupled to

driven

solenoid whose

its

in

net. In

So

the

by

normal

this

long

as

state

the

on

the

breaker's trip

actuator

armature

(Reset)

the

position

the

spring is compressed.

acfuator

undersideof the front frame

sition, the breaker can be closed

at will.

ally

ceives

actuator

the magnet,

ature;

paddle,

this drives the trip

the

As

turned to its

driven by

permanent

readiness for

in

The

However,

bip signal from the

a

is energized

allowing

tripping the

breaker

normal

crank on thebreaker's main sha-ft.

a

magnet

the next trip signal.

trip device requires

thetrip rod length. As

between the trip rod

ance paddle

is

gaged

by

when a closed breaker re-

and

the spring to release the

breaker.

opens,

(Reset) position

again

shown

0.125

a

of

arm.

is spring-loaded

by

remains inthe

programmer

its solenoid flux

rod

against

the

actuator arm

the

holds

only one

in

end

inch diameter rod.

22. Flux shi.ft trip deuice and operating

li.nkages

just

this component

electromagnetic

An

via

shaft

The

permanent

a

and opened

trip rod

a

acfuator

and

Reset

norm-

unit, the

opposes

the trip

via linkage

armature

captive

is

held

mag-

arm-

shaft

is

The

po-

re-

gap

the breaker

its Reset

is

adjuster retighten the

a

The

requires

case of malfunction,

should be replaced. connection mended that the breaker harness

convenient

spliced breaker harness and

directly from the female

the breaker harness.

of

tool

Cat.

0. 125

to

position.

end

actuator

no

point

thereto.

No.

CAUTION:

SST TRIP DEVICE

INOPERATIVE

BREAKER

OUT

BENEFIT

TECTION, THE

METHOD /S TO

BY

ROD

FULLY

ACTUATION

PADDLE,

Fig.

and

adjustment

24,

the

clear-

the trip

-

shaft

Ad-

inch+ 0. 015 inch.

and restore

until

jam

nut.

is

maintenance

to

the replacement unit, it

the breaker mechanism to

Loosen the

proper gap

the

a sealed,

factory-set

or

the

complete actuator

When

To

adjust,

jam

nut, rotate the

is attained, then

field

adjustment. In

making

the electrical

be cut

the

and

An

305183 is required for

IN

TO

TURNING ITS ADJUSTEN END

CLOCKWISE.

new actuator leads

afternate

remove the

methodis to untie the

old

actuator

connector on

AMP However.

AMP

this method.

THE EVENT

MUST BE

TO

CARRY CURNENT WITH-

OF OVERCURRENT

SHORTEN THE TRIP

OF THE

TIIAT THE

RENDERED

ALLOW THE

RECOMMENDED

THIS PREVENTS

TRIP SHAFT

open

device

is

extraction

recom-

at

solder-

the end

PRO-

and

unit

some

leads

20

_t\tr1

Power

Circuit

Breokers,

GEr-86134

Bottom

1.

Acfuator

2.

Trip rod

3.

Trip

o

ora.

tzs"

ROD

?

view

adjuster

paddle

Fig. 23. Flux

end

shift trip

deui.ce

components

Fig.

24.

Top

4.

Trip shaft

5.

Actuator

6.

Reset

Trip

view

linkage

rod

adjustment

arm

2t

GEI-86134,

Power

Circuit

Breokers

FLUX

SHIF

TRIP DEVICE

WHITE

Fi.g.

Cabling Diagram

25.

ground

fault

HARNESS

CONNECTOR

(AMP

201298-1

SS? nithout

-

PROGRAMMER

CONNECTOR

)

(AMP

201297-1

--_-J

)

Ir

t)-

IF IF

IF

IL

Fig.

26,

22

Cabling

fault

Diagram

on

S-wire load

HARNESS

CONNECTOR

(AMP

201298-1

SS"

-

)

PROGRAMMER

,A'8Jlf,";?I,

ground

with

I

t_______.!

Power

Circuit

Breokers,

GEI-86134

FLUX SHIFT

DEVICE

TRIP

li

.A

PROGRAMMER

UNIT

r----l

(48V.

dc)

(TO

SCR

ANODE)

s

F

F F

)--

F F

L

ll

{i

t______..i

PROGRAMMER

CONNECTOR

(AMP

201297-1)

ground

4.WIRE

LOAD

Fi.g. 27. Cabling

on

fault

Diagvam

4-wire

CONNECTOR

(AMP

-

load

SS?

201298-1)

uti.th

BREAKER HARNESS

CONNECTOR

CURRENT:":\

SENSORS

oA!-f€-l-1

'----ro

gj--o_f<

B

o

L______+_{.H

g-+-+-3

oc

+

>Fl|-*r<

)L'ii-ofi

.

NEUTRAL

SENSoR

DIScoNNEcT

I I i

L_t

r\r

I a--t----z

I

o_5

, d-J--J

"I H Gq

Fig.28.

GROUND FAULT

B

E-

A

c ,l

U

%

H-

K.

L.

N

M

\

D

R.

MALE

END

Cabling

Cable

and

single-phase,

CAT. NO.

DEFEAT

TGFD

H

il

I fr f

J

'1

tl

J

II

ffi

lr

diagram

inserted

SST Programmer

L

r

L

FEMALE

with

between

high

current

#

>5

END

CABLE

B

E

-A

D

H

^L

N

M

-P

R

Ground

breaher

Unit

PROGRAMMER

UNIT

l------r

r-1

ffr

# hll

4++---Jlll

<-t--F

e-+-o+--Jlllf

e+--o-f

++++---_-Jlllt

fft-rlll

ffJ---Jlll

ff

+o

<--l-{

L_t

Fault

lnrness

use

-

for

low

-

^lll.

"illf

L__

Defeat

during

uoltage

|

I

testing.

ANY

SST

PROGRAMMER

UNIT

WITH

GROUND ELEMENT

FAULT

23

GEI-86134,

Power

Circuit

Breokers

TYPE

powered cates SST except for

of

Long Time,

elements available.

able.

ECg

OVERCURRENT

The ECS is

a

trip device

1.

Programmer units

Short Time

only. The

2.

Fau1t

indicators

solid-state,

3. Phase sensors

Table

rating.

the tabulated range

is no

operates and

This

ponent

formance

reliability

same

single-phase, high

those employingthe

Fault

5,

each sensor has

different sensor is

A

ampere

as SST.

4.

Ground

In

all

Neutral

other

s enso rs

Fault

respects

can be treated identically to

includes circuitry,

location,

programmer

characteristics,

the flux

and

troubleshooting

procedures,

test

TRIP

DEVICE

direct-acting,

system

the following:

Ground

(trip

are

ratings,

ar

function.

that

essentiatly

are limited

and Instantaneous trip

targets)

not tapped.

only a

e not r equir ed

the ECS trip device system

to

combinations

Fault

element is not

not

are

listed in

As

single

available for each

which span the same

ampere

becaus e

size, construction,

unit

operatin

shift trip device.

test

and

points, per-

set

g

r

ange,

quality,

Use

procedures

current-low voltage tests

TAK-TS1 Test Set. Thei

of eourse, do not

apply.

self-

dupli-

avail-

ther

SST.

com-

the

for

or

Ground

of

,3"

:::--

e

Fig.

29. ECS

*

Programmer

unit

24

Fig.

"Ftux sHtFI"

TRIP

c0[.

30. ECS

Block

PxocBtLMEjugrJ

diagram

Power

Circuit

Breokers,

GEI-86134

Breaker

Type

AKR.3O

AKR.50

AKRT.SO

ri)

Pickup

\J/

Pickup tolerance

@

Frame

Size

(Amperes)

800

1600

2000

tolerance

Fi.g.

X

=Sensor

100,

300,400,

800,

is+ 9Vo

+

is

10Vo

31.

Rating

Trip

=

Amperes

in

Rating

Sensor

/

(amp"'e

\

Rating

150,

300,400,

800

600,

1200,

800,

2000

1600,

ECS current

breaker

IRIP

TCS

Pickg(=L)

\

)

Muiiiple

/

225,

600,

1600

ofX

\

.6,

q

1.1(X)

@ @

(See page 27

sensors

5

IABI.I

CHARACITRISIICS

PROGRAMMER

ECS

Time

Long

Time

Delav

Band

\

(Seconds)

/

Maximum

22

.7, .8,

time

lower limit

fim"

Intermed.

delay

10

Minimum

^

shown

band.

of

shown

10

for time-current

AKRU-44-30

on

ADJUSTMENT

Pickup

@

Multiple

/

@

\

ofl, /

3,4,5,

8,

6,

-or-

7.75,2,

2.25,2.5,

3,4

of

6007o

at

at lower

limit

cuwes)

Short

10

(L)

long

\

(L)

of band.

RANGE

Time

Delav

Band

(Seconds)

Maximum

0.35

Intermed.

o.2L

Minimum

0.095

pickup

time

(Set

@

Points)

Instantaneous

Pickup

/O\

Multiple

1

\ ofl',

4,5,6,

12

10,

8,

(6L),

setting

-

\

/

(L)

at

25

GEI-86134,

Power

Circuif

Breokers

Fig.

32.

LOAD

Cabling

SHIFT

FLUX

DEVICE

TRIP

HARNESS

CONNECTOR

(AMP

201298-1)

diagramfor

ECS

PROGRAMMER

UNIT

l-----l

(48V. dc)

(TO

ANODE)

t_______.!

PROGRAMMER

CONNECTOR

(AMP

201297-1)

Deui'ce

Trip

SCR

26

Fig.

ECS current

33.

sensor

I

IFffi

6

I

g

=

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GEt-86134

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t00

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AK-15/25

AKR.30

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.4x. .5x, .6x,

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.8x.

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AK/AKR.Ioo r600,2000.3000,4000

30

CURRENT SENSOR

OF

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-

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TAP

BREAKERS

(X)

AKT/AKRT-so .2x, .25x. .3x, .4x, .5x, & .6x

AK-75 .2x, .22x, .25x,.3x, AKR-75

AX/AKR-100

Ground

.2x, .22x, .25x,.3x, .35x & .37x

.lgx, .2x, .22x, .25x, .27x & .3x

Where X

Foull Deloy Sonds

Moximum, Inlermediole &

=

sensor

.35x,

lop seltinq

Minimum

&.4x

rther

f u

For

or

call

General

Office

Sales

information

write

Electric

Your

.

or

local

' '

Distribution EquiPment

41 Woodford Plainville,

CT

Division

Avenue

06062

GEN

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@

ELEcTRIG