GE AB-16 Manuale utente

INSTALLATION

198

4555

K

10

-

001

G

Supersedes

4555

KI

0

-

001

F

TYPES

AB

-

16

,

-

40

,

-

41

,

DB

-

16

,

-

30

,

-

40

,

-

41

AMMETERS

AND

VOLTMETERS

(

TAUT

-

BAND

SUSPENSION

)

(

THIS

PUBLICATION

FORMERLY

IDENTIFIED

AS

GEH

-

1564

)

WEB

*

iomi

The

Types

AB

-

16

,

-

40

,

-

41

and

Types

DB

-

16

,

-

30

,

-

40

,

and

-

41

are

switchboard

instruments

whose

moving

systems

are

supported

by

thin

metallic

bands

which

prac

-

tically

eliminate

friction

and

make

the

instrument

resistant

to

shock

.

PANEL

MOUNTING

All

drilling

and

wiring

should

be

completed

before

mounting

the

instruments

.

The

instruments

must

be

mounted

in

a

level

position

.

If

the

panels

are

over

3

/

8

"

thick

,

use

adapter

mounting

studs

as

shown

in

Fig

.

8

.

It

is

advisable

to

keep

wires

carrying

heavy

current

as

far

as

possible

from

all

indicating

instruments

.

When

the

Instrument

is

mounted

in

a

level

position

,

any

deviation

from

zero

should

be

corrected

by

means

of

the

zero

adjustment

.

Connect

the

Instrument

as

shown

in

the

appropriate

diagram

.

DO

NOT

REMOVE

COVER

WHILE

THE

INSTRUMENT

IS

ENERGIZED

.

SCALE

PLATE

,

POINTER

,

AND

ELEMENT

ASSEMBLY

MAY

BE

AT

HAZARDOUS

VOLT

-

AGE

LEVELS

.

WARNING

GROUNDING

CASES

OF

A

-

C

INSTRUMENTS

If

transformers

are

used

on

circuits

of

over

150

volts

,

connect

the

grounded

side

of

the

secondary

circuits

to

the

instrument

case

.

Use

No

.

12

Awg

copper

wire

.

Ground

connections

in

accordance

with

the

National

Electric

Code

.

A

-

C

AMMETERS

(

TYPE

AB

)

When

the

circuit

exceeds

30

amperes

or

650

volts

,

a

current

transformer

of

the

ratio

indicated

on

the

nameplate

must

be

used

,

and

instrument

scale

will

be

marked

in

primary

amperes

.

D

-

C

AMMETERS

(

TYPE

DB

)

D

-

c

ammeters

for

current

measurement

above

60

amperes

must

be

shunted

external

-

ly

.

Shunt

leads

can

be

provided

.

When

leads

are

supplied

by

the

purchaser

,

their

resistance

should

agree

with

the

value

stamped

on

the

instrument

nameplate

,

other

-

wise

an

error

in

the

reading

will

result

.

^

V

ALL

SHUNTS

SHOULD

BE

CONNECTED

IN

THE

GROUNDED

SIDE

OF

THE

LINE

WHEN

POSSIBLE

.

WHEN

THIS

IS

NOT

POSSIBLE

,

OR

THE

CIRCUIT

CAN

NOT

BE

GROUNDED

,

AVOID

REMOVING

THE

COVER

SINCE

THE

INSTRUMENT

WINDINGS

,

AS

WELL

AS

THE

SCALE

AND

POINTER

,

ARE

AT

LINE

POTEN

-

TIAL

.

USE

CAUTION

TO

AVOID

CONTACTING

THIS

POTENTIAL

.

WARNING

These

instructions

do

not

purport

to

cover

all

details

or

variations

in

equipment

nor

to

provide

for

every

Should

further

in

-

possible

contingency

to

be

met

in

connection

with

installation

,

operation

or

maintenance

,

formation

be

desired

or

should

particular

problems

arise

which

are

not

covered

sufficiently

for

the

purchaser

'

s

purposes

,

the

matter

should

be

referred

to

the

General

Electric

Company

.

ELECTRIC

GENERAL

Courtesy of NationalSwitchgear.com

Page

2

4555

K

10

-

001

TYPES

AB

&

DB

AMMETERS

AND

VOLTMETERS

RHEOSTAT

ADJUSTMENT

As

the

resistance

of

the

shunt

leads

used

in

certain

applications

can

not

be

predetermined

at

the

factory

,

it

has

been

found

desirable

to

furnish

some

d

~

c

am

-

meters

with

an

internal

rheostat

to

adjust

for

non

-

standard

lead

resistances

0

The

nameplate

on

the

instrument

has

an

INSTRUMENT

-

f

LEAD

RESIS

0

value

stamped

on

it

*

Connect

a

resistance

bridge

across

the

shunt

end

of

the

leads

(

shunt

dis

-

connected

)

and

the

instrument

across

the

opposite

end

.

Set

the

resistance

bridge

for

the

INSTRUMENT

+

LEAD

RESIS

.

value

stamped

on

the

nameplate

.

Remove

protective

cap

located

on

base

of

instrument

,

and

adjust

rheostat

until

a

zero

deflection

is

indicated

by

the

bridge

galvanometer

.

Replace

protective

cap

after

completing

ad

-

justment

*

If

a

resistance

bridge

is

not

available

,

connect

a

standard

millivoltmeter

across

the

shunt

end

of

the

leads

(

shunt

disconnected

)

and

the

instrument

across

the

opposite

end

.

Apply

a

low

,

adjustable

d

-

c

voltage

across

the

shunt

end

of

the

leads

and

adjust

this

voltage

until

the

indication

on

the

standard

millivoltmeter

agrees

with

the

fullscale

millivolts

(

marked

FULL

SCALE

MV

)

on

the

instrument

name

-

plate

.

Remove

protective

cap

located

on

base

of

instrument

and

adjust

rheostat

until

the

instrument

reads

full

scale

.

Replace

protective

cap

after

completing

ad

-

justment

.

A

-

C

VOLTMETERS

(

TYPE

AB

)

When

the

circuit

exceeds

750

volts

a

potential

transformer

of

the

ratio

in

-

dicated

on

the

instrument

nameplate

must

be

used

,

and

the

instrument

scale

will

be

marked

in

primary

volts

.

D

-

C

VOLTMETERS

(

TYPE

DB

)

D

-

c

voltmeters

designed

for

use

on

circuits

above

750

volts

,

and

d

-

c

ground

detectors

for

voltages

up

to

and

including

750

volts

,

are

furnished

with

external

resistors

and

are

connected

directly

to

the

circuit

to

be

measured

.

EXTERNAL

RESISTORS

"

Res

.

Ext

.

No

,

"

designation

on

the

nameplate

indicates

a

Form

-

3

resistor

is

required

,

where

"

No

.

"

is

the

resistor

part

number

.

Dimensions

of

the

external

re

-

sistors

are

given

in

Fig

.

20

and

21

,

and

circuit

connections

are

given

in

Fig

.

14

,

15

,

16

,

17

and

19

.

UNCALIBRATED

SCALES

Check

for

accuracy

of

full

scale

,

stickiness

,

etc

.

Failure

to

do

so

will

place

warranty

in

jeopardy

.

Do

not

touch

the

pointer

or

any

other

moving

parts

while

re

-

moving

cover

and

scale

because

of

the

possibility

of

unbalancing

the

element

.

TERMINAL

SCREWS

10

-

33

THREAD

4

MOUNTING

STUDS

1

/

4

-

38

THREAD

—

i

PANEL

—

-

fcjr

/

»

?

f

J

/

A

12

.

”

4

64

—

i

,

3

J

"

WSJ

is

©

f

“

i

5

n

ttffM

o

*

X

©

y

«

+

U

3

Z

4

'

V

®

13

'

JS

'

i

L

-

zn

-

iJ

-

tro

—

USE

ON

DOUBLE

*

RATED

AMMETERS

ONLY

*

4

64

i

"

A

“

’

A

”

*

3

-

3

/

8

FOR

AMMETERS

"

A

"

*

4

*

9716

"

FOR

VOLTMETERS

USE

ON

VOLTMETERS

ONLY

Dimensions

,

Type

AB

-

41

Ammeters

and

Voltmeters

,

Fig

.

1

.

Courtesy of NationalSwitchgear.com

Page

3

4555

K

10

-

001

TYPES

AB

6

c

DB

AMMETERS

AND

VOLTMETERS

USE

ON

VOLTMETERS

ONLY

10

-

32

THREAD

-

28

THREAD

^

TERMINAL

SCREWS

4

MOUNTING

9

TU

08

1

“

ISf

PANEL

/

(

ir

*

<

5

4

'

’

w

>

Cvl

«

£

f

D

1

A

,

DIA

.

I

i

(

I

?

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"

-

*

2

$

2

n

tf

"

A

"

u

31

FOR

AMMETERS

V

*

4

(

1

"

FOR

VOLTMETERS

*

4

-

USE

ON

DOUBLE

RATED

AMMETERS

ONLY

A

Fig

.

2

.

Dimensions

,

Type

AB

-

40

Ammeters

and

Voltmeters

.

4

MOUNTING

STUDS

{

*

"

-

28

THREAD

~

PANEL

'

TERMINAL

STUDS

£

'

*

20

THREAD

TOP

,

T

4.11

DIA

.

D

*

x

IEW

OR

SACK

SHOWING

TERMINAL

LOCATIONS

.

38

a

.

$

8

3.87

—

THIS

TERMINAL

FOR

USE

WITH

DOUBLE

RATED

INSTRUMENTS

ONLY

Dimensions

,

Types

DB

-

30

and

-

40

Ammeters

and

Voltmeters

.

Fig

.

3

«

TERMINAL

STUDS

1

/

4

-

2 8

THREAD

—

j

4

MOUNTING

STUDS

1

/

4

-

28

THREAD

*

y

/

PANEL

'

"

^

(

1

/

I

"

T

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"

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3

-

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32

1

"

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fv

»

64

e

23

"

r

THIS

TERMINAL

FOR

USE

WITH

DOUBLE

RATED

INSTRUMENTS

ONLY

32

16

4

-

s

-

32

Fig

.

4

.

Dimensions

,

Type

DB

-

4

‘

1

Ammeters

and

Voltmeters

.

Courtesy of NationalSwitchgear.com

Page

4

4555

K

10

-

001

TYPES

AB

&

DB

AMMETERS

AND

VOLTMETERS

r

-

4

MOUNTING

STUDS

1

/

4

”

-

28

THREAD

TOP

rTERMINAL

STUDS

1

/

4

"

-

28

THREAD

I

*

-

.

<

*

!

PANEL

/

\

&

r

i

-

if

3.9

?

'

"

(

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IM

OIA

.

r

4

f

IH

-

£

*

•

i

Z

M

—

.

*

VIEW

OF

BACK

SHOWING

TERMINAL

LOCATION

3

.

i

6

L

-

,

%

?

OVERALL

WIDTH

LTHIS

TERMINAL

FOR

USE

WITH

DOUBLE

RATED

INSTRUMENTS

ONLY

Dimensions

of

Type

DB

-

16

Ammeters

and

Voltmeters

.

-

*

.

?

5

Fig

.

5

,

TERMINAL

SCREWS

10

-

32

THREAD

—

T

4

MOUNTING

STUDS

1

/

4

"

-

28

THREAD

-

USE

ON

VOLTMETERS

ii

THESE

TERMINALS

FOR

USE

WITH

DOUBLE

RATED

AMMETERS

ONLY

PAH

6

L

*

<

0

2

i

o

(

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&

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~

3

/

0

FOR

AMMETERS

A

«

4

9

/

16

FOR

VOLTMETERS

-

*

Id

»

3

5

^

-

VIEW

OF

BACK

SHOWING

*

TERMINAL

LOCATIONS

r

i

0

VCMU

WIDTH

•

T

Dimensions

o

£

Type

AB

-

16

Ammeters

and

Voltmeters

.

Fig

.

6

9

L

3.37511

—

*

•

"

\

f

-

1

*

608

"

—

*

±

0.015

"

;

±

0.015

PANEL

\

;

-

(

>

f

(

ffi

‘

O

+

1

i

V

"

«

N

§

^

-

H

4

ADAPTER

MOUNTING

STUD

FOR

PANELS

OVER

9

/

16

”

THICK

SPECIFY

PANEL

THICKNESS

WHEN

ORDERING

.

i

—

5

/

I

6

"

DIA

.

(

4

HOLES

)

Fig

.

7

.

dri

1

ling

dimensions

.

Cut

-

out

and

panel

-

Fig

.

8

*

Adapter

mounting

stud

.

Courtesy of NationalSwitchgear.com

Page

5

4555

K

10

-

001

TYPES

AB

&

DB

AMMETERS

AND

VOLTMETERS

;

nU

SINCE

DANGEROUS

VOLTAGE

WILL

DEVELOP

IN

THE

OPEN

-

CIRCUIT

SECON

-

DARY

WINDINGS

OF

ENERGIZED

CURRENT

TRANSFORMERS

,

DE

-

ENERGIZE

THE

TRANSFORMERS

BY

SHORT

-

CIRCUITING

THE

SECONDARY

WINDINGS

BE

-

FORE

DISCONNECTING

OR

CONNECTING

INSTRUMENT

TO

TRANSFORMERS

.

WARNING

-

41

plastic

To

clean

Type

AB

-

16

,

-

41

,

and

Type

DB

—

16

,

-

30

windows

,

wash

with

'

soap

and

water

,

not

chemical

cleaners

.

Maintenance

:

t

SOURCE

<

2

>

Q

©

Hi

h

.

,

x

,

.

f

"

C

.

T

,

LOAD

HIGH

RATING

I

LOAD

SELF

CONTAINED

LOAD

r

HIGH

RATING

SOURCE

®

)

<

§

>

Hl

\

C

.

T

.

X

•

S

'

T

CXJ

-

I

©

LOAD

LOW

RATING

LOAD

WITH

CURRENT

TRANSFORMER

LOW

RATING

LOAD

Fig

,

9

,

External

con

-

nections

of

a

-

c

ammeters

*

Fig

*

10

*

External

con

-

nections

of

double

-

rated

a

-

c

altimeters

,

Fig

•

11

*

External

connections

of

double

-

*

rated

a

-

c

ammeters

with

current

transformer

*

SOURCE

-

SOURCE

SQURCE

L

+

©

3

E

>

txUSUp

*

X

9

SHUNT

r

©

}

LOAD

SELF

CONTAINED

LOAD

WITH

EXTERNAL

SHUNT

LOAD

HIGH

RATING

LOAD

LOW

RATING

Fig

.

13

.

External

connections

of

double

-

rated

d

-

c

ammeter

(

DB

-

40

,

-

41

only

)

*

Fig

,

12

.

External

connections

of

d

~

c

ammeters

*

SOURCE

FUSES

SOURCE

CITHH

c

*

-

SOURCE

fCZF

FU

»

9

[

W

tuTNO

*

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5

SO

<

)

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i

m

CZ

>

LOAD

%

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ati

.

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BCLOWI

SOURCE

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/

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,

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WITH

POTENTIAL

TRANSFORMER

WITH

EXTERNAL

RESISTANCE

WITH

EXTERNAL

f

»

t

5

«

TANCE

(

ABOVE

60

OV

)

Fig

*

14

.

External

connec

-

tions

,

a

-

c

voltmeters

.

Fig

,

15

.

External

connec

-

tions

,

a

-

c

voltmeters

with

notential

transformer

-

Fig

.

16

,

External

con

-

nections

,

double

-

rated

A

~

r

Vn

1

tm

A

t

A

r

q

Courtesy of NationalSwitchgear.com

Page

6

4555

K

10

-

001

TYPES

AB

6

c

DB

AMMETERS

AND

VOLTMETERS

SOURCE

©

m

i

#

HI

<

FUSES

'

a

—

>

FUSES

!

o

9

SOURCE

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EXTERNAL

RESISTOR

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Tinjv

,

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h

i

h

<

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SELF

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—

i

—

*

—

SOURCE

*

'

"

•

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*

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#

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-

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o

9

n

LOAD

EXT

.

RES

.

LOAD

LOAO

WITH

EXTERNAL

RESISTANCE

HIGH

RATING

Fig

.

19

External

connections

of

d

-

c

ground

detectors

,

Fig

.

18

External

con

-

nections

of

double

-

rated

d

-

c

voltmeters

.

Fig

.

17

External

connections

of

d

-

c

voltmeters

.

5

"

h

—

9

6

10

“

32

THO

2

8

I

TUBE

V

e

-

“

8

i

"

9

~

r

6

Fig

,

20

.

Form

-

3

resistor

,

single

tube

.

750

VAC

,

15

/

30

VAC

,

300

/

600

VAC

29

“

,

9

8

32

W

10

-

32

THO

i

.

L

.

W

.

21

”

1

—

4

-

3

~

32

8

1

-

?

3

.

*

r

J

16

2

TUBES

C

£

3

"

•

8

^

~

8

Formas

resistor

,

two

tubes

,

150

/

600

VAC

Fig

.

21

*

INSTRUMENT

PRODUCTS

OPERATION

,

GENERAL

ELECTRIC

COMPANY

,

LYNN

,

MASS

.

Printed

in

U

.

S

.

A

11

-

79

o

Courtesy of NationalSwitchgear.com

GE AB-16 Manuale utente

Manuali Strumento di misura popolari di altre marche