GE NAA27H User manual

INST

ION

GEI-74663D

TRANSFERRED

TRIP

RELAYS

Types

NAA27H

NAA27J

NAA27K

NAA27L

AUXILIARY

GENERALS

ELECTRIC

TRANSFERRED

TRIP

AUXILIARY

RELAYS

TYPE

NAA

DESCRIPTION

APPLICATION

The

Type

NAA

relays

covered

these

instruc

tions

are

auxiliary

relays

for

use

the

various

line

transferred

trip

schemes

as described

below.

The

NAA27H

relay

designed

for

use

direct

and

permissive

underreaching

transferred

trip

schemes

via

Type

tones,

includes

three

telephone

type

relay

units

designated as

TX,

GX,

and

RI,

and

target

seal-in

unit.

The

and

units

are

auxiliaries

the

guard

and

trip

frequency

receiver

units

which

are

normally

included

the

Type

tone

receiver.

The

normally

held

its

picked

position

contact

the

guard

frequency

receiver

unit.

Its

function

block

the

transferred

trip

circuit

and

sound

alarm

upon

loss

the

guard

channel.

The

Unit

picks

receipt

transferred

trip

signal

provide

alarm

during

test.

The

unit

energized

all

high-speed

trip

circuits,

including

the

received

transferred

trip

signal,

and

initiates

high

speed

reclosing.

The

NAA27J

relay

intended

for

use

per

missive

cverreaching

transferred

trip

schemes.

used

conjunction

with

the

NAA27H

relay

when

Type

pilot

involved

with

the

NAA27L

relay

when

the

channel

Type

carrier.

includes

three

telephone

type

relay

units

designated

TTY,

TTZ,

and

BX.

The

unit

which

has

time

delay

pick

cycles,

(60

cycle

basis)

operated

“b”

switch

the

associated

circuit

breaker

send

continuous

transferred

trip

signal

when the

breaker

open. The

TTY

unit

intended

general

purpose

unit

for

use

the

permissive

overreaching

scheme.

has

normal

drop

out

time

approxi

inately

cycle,

but

can,

desired,

used

with

external

capacitor

obtain

longer

drop

out

times.

The TTZ

unit

provides

the

small

coordinating

time

necessary

the

transferred

trip

circuit

per

missive

overreaching schemes.

The

NAA27K

relay

intended

for

use

direct

and

permissive

underreaching

permissive

over-

reaching

schemes

when

multi-terminal

lines

are

involved.

required

addition

the

other

necessary

transferred

trip

auxiliaries.

includes

two

telephone

type

relay

units

designated

and

TX,

which

are

identical

with

the

similar

units

the

NAA27H

relay.

The

NAA27L

relay

intended

for

use

direct

underreaching

transferred

trip

applications

where

Type

carrier

used

the

pilot.

includes

four

telephone

type

relays

units,

designated

TX,

GX,

RI,

and

TTY,

and

target

seal-in

unit.

The

TX,

GX,

and

units

are

identical

with

the

corres

ponding

units

the

NAA27H

relay.

The

TTY

unit is

high-speed

relay

used

key

the

type

carrier

channel.

should

noted

that

the

coils

all

telephone

type

units

these

relays are

furnished

with

surge

limiting

shunt

resistors.

OPERATING CHARACTERISTICS

The

operating

characteristics

all

units

are

shown

the

tabulations

accompanying

the

internal

connection

diagrams.

RATINGS

The

Type

NAA

relays

covered

these

instruc

tions

are

suitable

for

continuous

operation

the

rated

voltage

shown

the

nameplate

and

are

available for

24,

48,

125

and

250

volt

applications.

The

resistance

values

the

telephone

type

relays

and

associated

resistors

are

listed

the

internal

connection

diagram.

The

combination

target

and

seal-in

unit

the

NAA27H

and

NAA27K

relays

rated

shown

Table

TABLE

RATINGS

TARGET

AND

SEAL-IN

UNIT

Dual

Hated

‘2

0.2

2.0

0.6

2.0

Carry

Amos

for

(Sec)

0.05

2.2

0.5

3.5

Carry

Amps

for

(Sef)

0.45

2.0

5.0

Carry

continuously

(Amp)

0.37

2.3

1.2

2.6

Minimim

Operating

(Amp)

0.2

2.0

0.6

2.0

Minimum

Drop-out

(Amp)

0.05 0.5 0.15 0.5

resistance

(Ohms)

8.3 .24

0.78 0.18

impedance

(Ohms)

.65

6.2

0.65

impedance

(Ohms)

.54 5.1

0.54

resistive

2.5

Amp

Interrupting

rating

(Amps)

(‘125

VDC

T:yese

Instractlons

not

purport

cover

all

details

variations

equipment

nor

provide

for

c-er-v

posshle

cc.9tngency

met

connection

with

installation,

operation

maintenance.

Should

further

inlarmatioji

desired

should

particular

problems

alise

which

are

not

covered

sufficiently

for

purh.ers

purposc,

the

matter

should

referred

the

General

Electric

Company.

tsr-

extent required

the

products

described

herein

meet

applicable

ANSI,

IEEE

and

NEMA

standards;

:,ut

Iaruraz2ce

given

with

respect

local

codes

and

ordinances

because

they

vary

greatly.

1)11-74

663

Transferred

Trip

Auxiliary

Relays

Type

NAA

the

tripping

current

should

exceed

thirty

ç30)

amperes,

recommended

that

auxiliary

tripping

relay

used.

INSTALLATION

RECEIVING

These

relays,

when

not

included

part

control

panel,

vill

shipped

cartons

designed

protect

them

against

damage.

lrnniediatelv

upon

receipt

the

relay,

examination

should

made

for

any

damage

sustained

during

shipment.

injury

damage

resulting

from

rough

handling

is evident.

claim

should

hefiledatoncewiththe

transportation

company

and

the

nearest

Sales

Office

the

General

Electric

Company

notified

promptly.

Reasonable

care

should

exercised

unpack

ing

the

relay

order

that

none

the

parts

are

injured

adjustments disturbed.

the

relays

are

not

installed

immediately

they should

stored

their

original

cartons

place

that

free

from

moisture,

dust

and

metallic

chips.

INSPECTION

The

relay

should

inspected

the

time

installation

and

the

following

points checked:

Contacts

should

not

tarnished.

The

normally

open

contacts

both

telephone

relays

should

have

gap

0.015

inch.

The

normally

closed

contacts

should

have

0.005

inch wipe.

When

the

telephone

relays

are

operated

hand,

the

open

contacts

should

have

0.0

inch

gap

and

the

closed

contacts

should

have

0.005

inch

wipe.

CHECK

TESTS

UNIT

The

unit

should pick

80c

less

rated

voltage

across

the

operating

circuit.

The

pick

time

rated

voltage

should

milli

seconds

less.

UNIT

The

unit

should pick

less

rated

voltage

across

the

operating

circuit.

The

drop

out

ime

should

0.4

0.5

seconds

when

the

unit

oe-eneriized

from

rated

voltage.

UNIT

The

unit should

pick

UI)

less

rateci

v’ace.

Pick

time

should

Less

than

milli—

nds

ann

drop

out

tim

from

115

m.lli—

o:d..

UNIT

The

unit

shonld

iliek

:“

80,

rated

voltage.

Pick

UI)

time

rated

voltage

should

105

milliseconds.

TTY

UNIT

The

TrY

unit

should pick

less

rated

voltage.

The

pickup

and

dropout

time

given

below.

Ia’

Pickup

Propout

Time

Time(rns)

NAA27J

Bms

less

NAA27L

Forms

1—17

8ms

less

NAA27L

Forms

21-23

2ms

less

2nis

less

NAA27L

Forms

25-27

4ms

less

2ms

less

NAA27L

Forms

2ms

less

2nis

less

TTZ

UNIT

The

TTZ

unit

should

pick

70R

less

rated

voltage.

Pick

UI)

time

units

intended

for

application

with Type

tone

channels

1.25

cycles.

The

pick

time

units

intended

for

application

with

Type

carrier

channels

2.75

cycles.

Note

that

many

instances

polarity marks

are

shown

the

internal

connection

diagrams.

These

polarities

should

observed

when

making

check

tests.

LOCATION

AND

MOUNTING

The

location

should

clean

and

dry,

free

from

dust

and

excessive

vibration

and

well

lighted

facilitate

inspection

and

testing.

The

relays

should

mounted

vertical

surface.

The

outline

and

panel

drilling

diagrams

are

shown

Fig.

and

CONNECTIONS

The

internal

wiring

diagrams

for

the

various

relays

covered

these

instructions

are

shown

Figs.

inclusive.

Unless

mounted

steel

panel

which

adequately

rounds

the

relay

case,

is recommended that

the

ease

grounded

through

mounting

stud

screw

with

()nductor

not

less

than

&‘

gauge

copper

\VJ

its equivalent.

-1

Transferred

Trip

Auxiliary

Relays

Type

NAA

GEt-74iO2

MAINTENANCE

The

Type

NAA

relays

covered

these

instruc

tions

are

shipped

from

the

factory

completely

cali

brated,

hut

iii

the

event

that

found

that

any

the

unitsar

out

cahbration,

the

adjustments

under

the

SERVICING SECTION

may

followed.

When

performing

these

adjust

nients,

refer

Fig.

the

telephone

type

units reduce

the

pressure

the

normally

closed

contacts

bending

the

flexible

movable

contact

arm

slightly.

Pick

UI)

time

may

increased

reversing

this

procedure.

DROP

OUT

TIME

CONTACTS

SERVICING

cleaning

the

contacts

the

telephone

type

units

flexible

burnishing

tool

should

used.

This

consists

flexible

strip

metal

with

etched,

roughened

surface,

resembling

super—fine

file.

The

polishing

action

delicate

that

scratches

left,

vet

roded

material

will

removed

rapidiv

and

thc

roughlv.

The

flexibility

the

tool

insures

cleaning

the

actual points

the

con—

tact.

The

untacts

should not

cleaned

with

knives,

bies

abrasive

paper

cloth.

Knives

files

leave

scratches

which

increase

arcing

de—

rioratioi

the

contacts.

Abrasive

paper

cloth

lavc

minute

particles

insulating

abrasive

-rateriai

the

contacts

thus

preventing

good

contact

ion.

PICKUP

imP

that

the

pick

any

the

tele—

P000e

f’)C

onir

tCJO

high

may

restored

(

ianging

ia.

log

between

the

armature

and

the

‘.

tlnL

the

contact

operating

arm.

After

ac1ustmen

OIl

marts

must

readjusted

005

wipe

and

i’

gal)

0.015

inch.

ibCK—UPF

IME.

The

drop

out

time

any

the

telephone

type

units

may

adjusted

means

the

residual screw

the

armature.

The

the

residual

screw

turned

the

shorter

the

drop

out

time.

sure

tighten

the

locknut

after

adjusting

the

residual screw.

Any

change

the

residual

screw setting

must

accompanied

readjustment

the

contact

gap

and

wipe.

This

can

readily

accomplished

bending

the

contact

operating

arm.

NOTE:

The

residual

screw

must

not

backed

off

completely

but

should

always

project

least

0.002

inch beyond the

face

the

armature.

All

the

adjustments described

may be

easily

made

with

the

tools

supplied

the

relay

tool

kit

XRTI

IAI.

RENEWAL

PARTS

recommended that sufficient

quantities

renewal

parts

carried

stock

enable

the

prompt

replacement

any

that

are

worn,

broken

damaged.

When

ordering

renewal

parts,

address

the

near

est

Sales

Office

the

General

Electric

Company)

specify

quantity

required,

name

part

wanted,

and

give

complete

nameplate

data.

possible,

give the

General

Electric

Company

requisition

number

which the

relay

was

furnished.

rcier

iecrease

the

pick

time

any

•EI-74663 Transferred

Trip

Auxiliary

Relays

Type

NAA

2%O(

3OO

O16

°°

F-n.

(Ol2749472-.

Sh.1

and

3127A9472-2

Sh.2)

Internal

Connections

for

NAA27H

Fornis

1-2-3-4.

•

1;5

•G

Transferred

Trip

Auxiliary

Relays

Type

NAA

GFt-7463

MODEL

RATED

s—ij--—

jj-

jy-

jjj

lj-

i5-j—

(SECS)

SECS)

(SEC

SECS)

OHMS OHMS

OFLS

12NAA27H5A

250

.008

1200

.4-.5

2500

.016

IGOO

5000

4ORt

0000

125

008 1200

4—.

2500

016

2000 1500

1000

NON’

O00

7A48

)O815O.4-

800

p2OOt4O4O

700

.008

.4—.

100

.016

100

70.

tiO3E

12.

200

—--Lz:

Fig.

(0178A7123-2

Sh.1

and

0178A7123-O

Sh.2)

Internal

Connections

for

NAA27H

Forms

Thru

13.

12.5

Fig.

(0195A4933

Sh.1

141

and

0195A4933

Sh.?

121)

Irernai

Connections

for

14AA27H

Forms

and

Up.

GEI-74663

Truisferred

Trip

Auxiliary

Pclavs

Type

NAA

‘Si’

,19

‘T

—-

—

)4ODXL

ATD

P.U.

(ILJ4S

0.0.

HNS

P.11.

D.C.

*iMS

(SC’,

(scs

SECS

(sECs

oios

0I14S

0104S

)HMS

----—----

—

——

—

—1

1aiizia

25QQ

QL-.

flOQ

0CO

cOO

000

0OC

VCZD

.15LiO

LL4_

.008

LJ_

1000

2G00

1500

1000

NONE

5000

Fig.

(0127A9473-1

Sh.1

and

0127A9473-7

Sh.2)

Internal

Connections

for

NAA27J

Forms

Thru

10.

TTY

Transferred

Trip

Auxiliary

Relays

Type

NAA

GE-74’P3

i*1

TTY

_[TTY

MUF

IBX

OHMS OHMS

OHMS

MFD

OI*4S

OHMS

TTY

TTZ

OHMS

P:u.

(CS)

P-U.

(SE

CS)

.008

OHMS

5000

1200

150

DEL

RATE[’I

-U_.

OHMS

(SEC

12NAA27J1

250

.10

800

125

.10

800

______

.10

100

.10

100

250

.10

800

125

BOO

.10

100

.10

100

?S0

800

1Z5

,00

021

.021

2OOO

4500

850

20000

1650

9000

1200

150

2ooc’.’

0000

150

.25

10000

0000

1.0

1000

10O

300

.008

.021

125

100

350

1.0

260

400

.008

250

.045

3750

6000

150

.25

7500

.008

.045

7800

1650

1500150

.25

0,000

2000

.008

.045

800

300

260

1.0

1200

425

.008

.045

200

100

125

1.0

300

500

.a05OOo

750.?OOoo;

20000

Zio

GEI-746E53

Transferred

Trip

Auxiliary

Relays

Type

NAA

Fi4.

(0J78A9042-2 Sh.1

and

017$1U042—O

Sh,2)

Intrni

Connections

for

NAA27J

Forms

and

Up.

•1

1’

ftJF

MODEL

RATF.fl

125

p.’j.

(SEC)

.10

OHMS

p.U.

(SEC.)

OHMS

Pu.

(SEC)

OHMS

800

.008

1200.016

4500

1650

9000

OHMS

OHMS OHMS

OHMS

150

.25

10000

2.0

12A

25O

800

008

5000

iTW

20000

13A

125

.10

800

.008

1200

.021

4500

1650

9000

iSO

.25

10000 10000

2.0

100

14A

.±L.

.008

850

1200

1000 1500

075

100

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