GE NAA27H User manual

INST
RU CT ION S
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
by
these
instruc
tions
are
auxiliary relays
for
use
in
the
various
line
transferred
trip
schemes as described below.
The
NAA27H
relay
is designed
for
use
in direct
and
permissive
underreaching
transferred
trip
schemes via
Type
10
tones, It includes
three
telephone type
relay
units
designated as
TX,
GX,
and
RI,
and
a
target
seal-in unit.
The
GX
and
TX
units
are
auxiliaries
to
the
guard
and
trip
frequency
receiver
units
which
are
normally
included
in the
Type
10 tone
receiver.
The
GX
is normally held
in
its
picked
up position
by
a
contact
of
the
guard
frequency
receiver
unit.
Its
function
is
to block
the
transferred
trip
circuit
and
to sound
an
alarm
upon
loss
of
the guard
channel.
The
TX
Unit
picks
up
on
receipt
of a
transferred
trip
signal
to
provide
an
alarm during
test.
The
RI
unit
is energized
by all
high-speed
trip
circuits,
including
the
received
transferred
trip
signal,
and
initiates
high
speed
reclosing.
The
NAA27J
relay
is
intended
for
use
on per
missive
cverreaching
transferred
trip
schemes.
It
is
used
in
conjunction with
the
NAA27H
relay
when
a
Type
10
pilot
is
involved
or
with
the
NAA27L
relay
when
the channel
is
Type
50
carrier. It
includes
three
telephone
type
relay
units
designated
as TTY,
TTZ,
and
BX.
The
BX
unit
which
has
a
time
delay
pick
up
of
6 cycles,
(60
cycle
basis)
is
operated
by
a
“b”
switch
on
the
associated circuit
breaker to
send
a
continuous
transferred
trip
signal
when the
breaker
is
open. The
TTY
unit
is
intended
as
a general
purpose
unit
for
use
in
the
permissive
overreaching
scheme.
It has
a normal
drop
out
time
of
approxi
inately
1
cycle,
but
can,
11
desired,
be
used
with
an
external
capacitor
to
obtain
longer
drop
out
times.
The TTZ
unit
provides
the
small
coordinating
time
necessary
in
the
transferred
trip
circuit
on
per
missive
overreaching schemes.
The
NAA27K
relay
is
intended
for
use
on
direct
and
permissive
underreaching
or permissive
over-
reaching
schemes
when
multi-terminal
lines
are
involved.
It
is
required
in
addition
to
the
other
necessary
transferred
trip
auxiliaries.
It
includes
two
telephone
type
relay
units
designated
as
GX
and
TX,
which
are
identical
with
the
similar
units
in
the
NAA27H
relay.
The
NAA27L relay
is
intended
for
use
on
direct
underreaching
transferred
trip
applications
where
Type
50
carrier
is
used
as
the
pilot.
It
includes
four
telephone
type
relays
units,
designated
as TX,
GX,
RI,
and
TTY,
and
a
target
seal-in
unit.
The
TX,
GX,
and
RI
units
are
identical
with
the
corres
ponding
units
in
the
NAA27H
relay.
The
TTY
unit is
a
high-speed
relay
used
to
key
the
type
50 carrier
channel.
It
should
be
noted
that
the
coils
of
all
telephone
type
units
in
these
relays are
furnished
with
surge
limiting
shunt
resistors.
OPERATING CHARACTERISTICS
The
operating
characteristics
of
all
units
are
shown
in
the
tabulations
accompanying
the
internal
connection
diagrams.
RATINGS
The
Type
NAA
relays
covered
by
these
instruc
tions
are
suitable
for
continuous
operation
at
the
rated
DC
voltage
shown
on
the
nameplate
and
are
available for
24,
48,
125
and
250
volt
applications.
The
resistance
values
of the
telephone
type
relays
and
associated
resistors
are
listed
on
the
internal
connection
diagram.
The
combination
target
and
seal-in
unit
in the
NAA27H
and
NAA27K
relays
is rated
as
shown in
Table
I.
TABLE
I
RATINGS
OF
TARGET
AND
SEAL-IN
UNIT
Dual
Hated
‘2
0
0.2
2.0
0.6
2.0
Carry
30
Amos
for
(Sec)
0.05
2.2
0.5
3.5
Carry
10 Amps
for
(Sef)
0.45
2.0
5.0
30
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
DC
resistance
(Ohms)
8.3 .24
0.78 0.18
60 Hz
impedance
(Ohms)
50
.65
6.2
0.65
50
Hz
impedance
(Ohms)
42
.54 5.1
0.54
DC
resistive
2.5
Amp
Interrupting
rating
(Amps)
(‘125
VDC
T:yese
Instractlons
do
not
purport
to cover
all
details
or
variations
in
equipment
nor
to
provide
for
c-er-v
posshle
cc.9tngency
to
be
met
in
connection
with
installation,
operation
or
maintenance. Should
further
inlarmatioji
b
desired
or
should
particular
problems
alise
which
are
not
covered
sufficiently
for
hc
purh.ers
purposc,
the
matter
should
be
referred
to
the
General
Electric
Company.
To
tsr-
extent required
the
products
described
herein
meet
applicable
ANSI,
IEEE
and
NEMA
standards;
:,ut
ns
Iaruraz2ce
is
given
with
respect
to local
codes
and
ordinances
because
they
vary
greatly.

1)11-74
663
Transferred
Trip
Auxiliary
Relays
Type
NAA
If
the
tripping
current
should
exceed
thirty
ç30)
amperes,
it
is
recommended
that
an
auxiliary
tripping
relay
be
used.
INSTALLATION
RECEIVING
These
relays,
when
not
included
as
a part
of
a
control
panel,
vill
be
shipped
in
cartons
designed
to
protect
them
against
damage.
lrnniediatelv
upon
receipt
of
the
relay,
an
examination
should
be
made
for
any
damage
sustained
during
shipment.
If
injury
or
damage
resulting
from
rough
handling
is evident.
a
claim
should
hefiledatoncewiththe
transportation
company
and
the
nearest
Sales
Office
of
the
General
Electric
Company
notified
promptly.
Reasonable
care
should
be
exercised
in unpack
ing
the
relay
in
order
that
none
of
the
parts
are
injured
or
adjustments disturbed.
If
the
relays
are
not
to
be
installed
immediately
they should
be
stored
in
their
original
cartons
in
a
place
that
is
free
from
moisture,
dust
and
metallic
chips.
INSPECTION
The
relay
should
be
inspected
at
the
time
of
installation
and
the
following
points checked:
1.
Contacts
should
not
be
tarnished.
2.
The
normally
open
contacts
of
both
telephone
relays
should
have
a
gap
of
0.015
inch.
3.
The
normally
closed
contacts
should
have
a
0.005
inch wipe.
4.
When
the
telephone
relays
are
operated
by
hand,
the
open
contacts
should
have
a
0.0
15
inch
gap
and
the
closed
contacts
should
have
a
0.005
inch
wipe.
CHECK
TESTS
TX
UNIT
The
TX
unit
should pick
up
at
80c
or
less
of
rated
voltage
across
the
operating
circuit.
The
pick
p
time
at
rated
voltage
should
be
8
milli
seconds
or
less.
CX
UNIT
The
CX
unit
should pick
up
at
80
or
less
of
rated
voltage
across
the
operating
circuit.
The
drop
out
ime
should
be
0.4
to
0.5
seconds
when
the
unit
is
oe-eneriized
from
rated
voltage.
RI
UNIT
The
HI
unit should
pick
UI)
at
7O
OI
less
of
rateci
v’ace.
Pick
up
time
should
he
Less
than
16
milli—
.t
c
nds
ann
drop
out
tim
from
115
to
I
1i
m.lli—
Sc
o:d..
BX
UNIT
The
RN
unit
shonld
iliek
:“
at
80,
or
s ut
rated
voltage.
Pick
UI)
time
at
rated
voltage
should
be
95
to
105
milliseconds.
TTY
UNIT
The
TrY
unit
should pick
up
at
8Y
or
less
of
rated
voltage.
The
pickup
and
dropout
time
is
given
below.
R
Ia’
Pickup
Propout
e
Time
Time(rns)
NAA27J
Bms
or
less
33
to
50
NAA27L
Forms
1—17
8ms
or
less
33
to
50
NAA27L
Forms
21-23
2ms
or
less
2nis
or
less
NAA27L
Forms
25-27
4ms
or
less
2ms
or less
NAA27L
Forms
28 &
up
2ms
or
less
2nis
or
less
TTZ
UNIT
The
TTZ
unit
should
pick
up
at
70R
or
less
of
rated
voltage.
Pick
UI)
time
of
units
intended
for
application
with Type
10
tone
channels
is
1.25
cycles.
The
pick
up
time
ci
units
intended
for
application
with
Type
50
carrier
channels
is
2.75
cycles.
Note
that
in
many
instances
polarity marks
are
shown
on
the
internal
connection
diagrams.
These
polarities
should
be
observed
when
making
check
tests.
LOCATION
AND
MOUNTING
The
location
should
be
clean
and
dry,
free
from
dust
and
excessive
vibration
and
well
lighted
to
facilitate
inspection
and
testing.
The
relays
should
be
mounted
on
a
vertical
surface.
The
outline
and
panel
drilling
diagrams
are
shown
in
Fig.
6
and
7.
CONNECTIONS
The
internal
wiring
diagrams
for
the
various
relays
covered
by
these
instructions
are
shown
in
Figs.
1
to
4
inclusive.
Unless
mounted
on
a
steel
panel
which
adequately
rounds
the
relay
case,
it
is recommended that
the
ease
he
grounded
through
a mounting
stud
or
screw
with
a ()nductor
not
less
than
I2
B
&‘
S
gauge
copper
\VJ
r(
or
its equivalent.
-1

Transferred
Trip
Auxiliary Relays
Type NAA
GEt-74iO2
MAINTENANCE
The
Type
NAA
relays
covered
by
these
instruc
tions
are shipped
from
the
factory
completely
cali
brated,
hut
iii
the
event
that
it
is
found
that
any
of
the
unitsar
c
out
of
cahbration,
the
adjustments
under
the
SERVICING SECTION
may
be
followed.
When
performing
these
adjust
nients,
refer
to
Fig.
5.
of
the
telephone
type
units reduce
the
pressure
of
the
normally
closed
contacts
by
bending
the flexible
movable
contact
arm
slightly.
Pick
UI)
time
may
be
increased
by
reversing
this
procedure.
DROP
OUT TIME
CONTACTS
SERVICING
F
r
cleaning
the
contacts
of
the
telephone
type
units
a
flexible
burnishing
tool
should
be
used.
This
consists
of
a
flexible
strip of
metal
with
an
etched,
roughened
surface,
resembling
a
super—fine
file.
The
polishing
action
is
so
delicate
that
no
scratches
r
e
left,
vet
cc
r
roded
material
will
be
removed
rapidiv
and
thc
roughlv.
The
flexibility
of
the
tool
insures
he
cleaning
of
the
actual points
of
the
con—
tact.
The untacts
should not
be
cleaned
with
knives,
bies or
abrasive
paper
or
cloth.
Knives
or
files
av
leave
scratches
which
increase
arcing
or
de—
rioratioi
of
the
contacts.
Abrasive
paper
or
cloth
ia
lavc
minute
particles
of
insulating
abrasive
-rateriai
n
the
contacts
thus preventing
good
contact
:1
ct
ion.
PICKUP
11
C
imP
that
the
pick
up
of
any
of
the tele—
P000e
f’)C
onir
i
tCJO
high it
may
be
restored
by
(
ianging
he
.o
ia.
log
between
the armature
and
the
Ic
bc
e
‘.
ir
tlnL
the
contact
operating
arm.
After
I
is
ac1ustmen
OIl
I
marts
must
he
readjusted
to
I a
i o
005
n
I:
wipe
and
i’
gal) of
0.015 inch.
ibCK—UPF
IME.
The
drop
out
time
of
any
of
the
telephone
type
units
may
be
adjusted
by
means
of
the
residual screw
in
the
armature.
The
more
the
residual
screw
is
turned
in
the
shorter
the
drop
out
time.
Be
sure
to
tighten
the
locknut
after
adjusting
the
residual screw.
Any
change
in
the
residual
screw setting
must
be
accompanied
by
a
readjustment
of
the
contact
gap
and
wipe.
This
can
be
readily
accomplished
by
bending
the
contact
operating
arm.
NOTE:
The
residual
screw
must
not
be
backed
off
completely
but
should
always
project
at
least
0.002
inch beyond the
face
of
the
armature.
All
the
adjustments described
may be
easily
made
with
the
tools
supplied
in
the
relay
tool kit
XRTI
IAI.
RENEWAL
PARTS
It
is
recommended that sufficient
quantities
of
renewal
parts
he
carried
in
stock
to
enable
the
prompt
replacement
of
any
that
are
worn,
broken
or
damaged.
When
ordering
renewal
parts,
address
the
near
est
Sales
Office
of
the
General
Electric
Company)
specify
quantity
required,
name
of
part
wanted,
and
give
complete
nameplate
data.
If
possible,
give the
General
Electric
Company
requisition
number
on
which the
relay
was
furnished.
hi
rcier
iecrease
the
pick
up
time
of
any

•EI-74663 Transferred
Trip
Auxiliary
Relays
Type
NAA
\
H
n
H
t
k
HM
a
-
2%O(
3OO
O16
°°
I
F-n.
i
(Ol2749472-.
Sh.1
and
3127A9472-2
Sh.2)
Internal
Connections
for
NAA27H
Fornis
1-2-3-4.
Li
•
RI
H
2
1;5
•G
15

Transferred
Trip
Auxiliary Relays Type
NAA GFt-7463
RI
0
10
TX
CX
RI A
B
C
B
E
MODEL RATED
s—ij--—
jj-
jy-
jjj
lj-
i5-j—
(SECS)
SECS)
(SEC
SECS)
OHMS OHMS OHMS OHMS
OFLS
12NAA27H5A
250
.008 1200
.4-.5 2500 .016
IGOO
5000 5000
3
4ORt
0000
A 125 -
. 008 1200
. 4—.
5
2500 . 016
f
2000 1500
1000
NON’ O00
7A48
)O815O.4- 800
16
p2OOt4O4O
700
8A
24
.008 58 .4—. 5
100 .016
100 100
70.
tiO3E
12.
200
—--Lz:
Fig. lB
(0178A7123-2 Sh.1 and 0178A7123-O Sh.2) Internal Connections for NAA27H Forms
5
Thru
13.
11
0
15
17
9

12.5
*
Fig.
1C
(0195A4933
Sh.1
141
and
0195A4933
Sh.?
121)
Irernai
Connections
for
14AA27H
Forms
15
and
Up.
GEI-74663
Truisferred
Trip
Auxiliary
Pclavs
Type
NAA
I
‘Si’
,19
‘T
20
I
Li
I.
Li
2
C
68
-
—-
-
—
J
I
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F
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ATD
P.U.
(ILJ4S
0.0.
HNS
P.11.
D.C.
*iMS
.
(SC’,
(scs
SECS
(sECs
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0I14S
0104S
lI
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----—----
—
—
1
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—
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QL-.
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0OC
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5
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LJ_
J
I
1000
2G00
1500
1000
NONE
5000
8

Fig. 2A
(0127A9473-1 Sh.1 and 0127A9473-7
Sh.2)
Internal Connections
for
NAA27J Forms
1
Thru 10.
13
Q
TTY
Transferred
Trip Auxiliary Relays
Type
NAA
GE-74’P3
i*1
TTY
_[TTY
E MUF
I
IBX
B C
D E F
G
OHMS OHMS OHMS
MFD
OI*4S
OHMS
BX
TTY
TTZ
6
A
OHMS
OHMS P:u.
(CS)
P-U.
(SE
CS)
.008
.008
.008
OHMS
5000
1200
150
DEL
RATE[’I 5 -U_.
OHMS
(SEC
12NAA27J1
250
.10 800
24
125
.10
800
______
34 48
.10
100
44 24
.10
100
5A 250
.10
800
64 125
. 10 BOO
74
48
.10 100
84
24
.10
100
9
?S0 10
800
iO 1Z5
10
,00
021
021
.021
2OOO
4500
850
20000
1650
9000
1200
150
25
2ooc’.’
0000
150 .25
10000 0000
50
1.0
1000 10O
300
.008
40 .021
125 100
350
50
1.0
260 400
.008
250
.045
3750
6000
150
.25 7500
.008
58
.045
7800 1650
1500150
.25 0,000 2000
.008
10
.045 800
300
260 50
1.0 1200 425
.008 10
.045
200 100 125
50
1.0
300 500
.a05OOo
.Y 750.?OOoo;
5O
2 20000
oo
00
Zio
9

GEI-746E53
Transferred
Trip
Auxiliary
Relays
Type
NAA
Fi4.
?3
(0J78A9042-2 Sh.1
and
017$1U042—O
Sh,2)
Intrni
Connections
for
NAA27J
Forms
11
and
Up.
•1
A
A
.1
L
EJ
A
1’
L
I
A
A
A
1
ftJF
L
4
6
MODEL
RATF.fl
hA
125
p.’j.
(SEC) 1
.10
rn
OHMS
p.U.
(SEC.)
OHMS
Pu.
(SEC)
OHMS
800
.008
1200.016
4500
1650
9000
A
BC
DE
F
G
H
J
OHMS
OHMS
OHMS
OHMS
OF
OHMS OHMS
LW
OHMS
150
.25
10000
10000
2.0
12A
-
25O
fl
800
008
5000
2
iTW
0
20000
13A
125 .10
800
.008
1200
.021
4500
1650
9000
iSO
.25 10000 10000
2.0
100
14A
.±L.
.008
850
1200
50
1000 1500
075
50
_
zz
zt
100
10