GE NGV Series User manual

INSTRUCTIONS
A-C
UNDERVOLTAGE
RELAY
TYPE
NGV
MODEL
12NGV28B(-)A
EK-45498
INSERT
BOOKLET-GEI-90805
INTRODUCTION
These
instructions
plus
those
included
in
GEI-90805
form
the
instructions
for
this
relay.
DESCRIPTION
Relay
model
NGV28B(-)A
is similar
is
wired to
studs
15-16
of
an S2
case.
circuits
to
be
brought
out
at
separate
to
model
NGV13B(-)A
except
This
allows
the
wiring
of
case
and
cradle
blocks.
the
coil
circuit
coil
and
contact
The
table
below
lists
the
ratings
presently
available
on
the
NGV28B(—)A relay:
NGV28B(-)A
VOLTS
FREQUENCY
DROPOUT
VOLTS
FORM
CONT.
(HERTZ)
CALIBRATION
RANGE
1
120
60 70
- 100
relay.
Figure
1
of
this
supplement
is
the
internal
connections
diagram for
this
for
the
S2
Figure
2 of
case.
this
suplenient
gives
the
outline
and
panel
drilling
dimensions
POWER
SYSTEMS MANAGEMENT
DEPARTMENT
GENERALS
ELECTRIC
PNILAIELPRIA.
PA.
7iesc
instructions
do
not
purport
to
cover
all
details
or
variations
in
equipment nor
to
provide
for
as
i
pussibJ
ciintinqoncq to be
met
in
connection with
installation,
operation
or maintenance.
Should
ljrthor
nftcnation
be
desired
or
should
particular proh.lems arise
which
are
not
covered
sufficiently for
the
purcr.laer’s
purposes,
the
matter
should
he
rvferred
to
the
General
Electric
Coyrany.
Tc
the
extant required
the
product.s
described herein
meet
applicable
ANSI,
lEE’S
and
N74A
standards;
hit
no
sueS
assurance
is
given
with
r.pcct
to
local
codes
and
ordinances
because they
vary
greatly.

T
v*v*
GEK-45498
‘5
FIG.
1
(269A3034-
0
)
INTERNAL CONNECTIONS
DIAGRAM FOR
THE
NGV28B(-)A
RELAY.
R
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3
0
7
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R2
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FORM
(OHMS) (OHMS)
(OHMS)
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GE Power
Management
215
Anderson Avenue
Markham, Ontario
Canada L6E 1B3
Tel: (905)
294-6222
Fax:
(905)
201-2098
wwwge.comlindsyslpm

GE
I-90805J
INSTRUCTIONS
NGV11A
NGV11B
HGV12A
NGV12B
NGV12C
NGV13A
NGV13B
- Forms
- Forms
- Forms
- Forms
- Forms
- Forms
- Forms
11
and
up
11
and
up
11
and up
11
and
up
11
and
up
21
and up
21
and
up
UNDERVOLTAGE
RELAYS
TYPES
GE
Meter
and
Control
205
Great
Valley
Parkway
Malvern,
PA
19355-07 15

GEI-90805
CONNFCTING
PLUG
MAIN
BRUSH
CONNECTING BLOCK
AUXILIARY
BRUSH
I
TERMINAL
BLOCK
SHORTING
BAR
NUlL
Al
TI R
ENGAGING AUXILIARY
BRUSH
CONNECTING
PLUG
TRAVELS
1/4
INCH
BEFORE ENGAGING
THE MAIN
BRUSH ON
THE TERMINAL
BLOCK
Figure
1 (8025039) Cross
Section
of
Drawout Case Showing
Position
of
Auxiliary Brush
.FRAME
OPERATING
k
ARM
\ARMATURE
RESIDUAL
SCREW
LOCKNUT
II
HEELEND OPERATINGARMSTOP
COIL
—POLEPIECE
Figure
2
(8012106)
Typical Telephone
Type
Unit
Used in
NGV Relays
N TAG TS
2

GE 1-90805
UNDERVOLTAGE
RELAYS
TYPE
NGV
DESCRIPTION
The
NGV
relay
is
a high-speed
relay
designed
to
be used
wherever
undervoltage
protection
is
required.
The
relay
is designed
to
operate continuously
picked
up
at
its
rated
voltage
if
required.
The
different models
available
are
listed
in
Table
A.
TABLE
A
NGV
RELAY MODELS
No. of Units
No.
of
Type
of
Relay
in
Case
Targets
Case
NGV11A
3
0 S2
NGV11B
3
2
S2
NGV12A
2
0 S2
NGVI2B
22
S2
NGV1?C
2
0 S2
NGV13A
1
0 Si
NGV13B
1 1
Si
The
relay
undervoltage
element
consists of
a
telephone-type
relay
in series
with
a zener
regulator
connected
across
a
full
wave
rectifier.
A
capacitor
is
connected
across
the
rectifier
AC
supply
to
protect
the
rectifier
from
severe
voltage
surges.
A rheostat
is
connected
in
series
with
the
rectifier
to
provide
pickup
adjustment. Targets
mounted
in
the
drawout
case
are
available
as
indicated
in
Table
A.
The
outline
and
drilling
dimensions of
the
relay
are
depicted in
Figures
10
and 11.
APPLICATION
The
NGV
relay
is
intended for
general
application
wherever instantaneous
detection
of
undervoltage
is
required.
Some
specific
applications are
listed
below:
1.
Instantaneous
undervoltage
detection for
preferred—emergency
throwover control
equipment.
2.
Ground
fault
detection
for
faulted—phase
selection
on
ungrounded systems.
3.
Phase
fault
detection
for
disabling
telephone
or
telemetering
services
at
stations
with
weak
backfeed
on
carrier
channels used
for
relaying.
These
Instructions
do
not
purport
to
cover
all
details
or
variations
2n
equipxnt
nor
to
provide
for
,v’r
possible
contingency
to
bt nc.t
so connection
with
installation,
operation
or
zrintenance.
Should
srrer
r.formtAon
be
desired
or
should
particu1ar
prnhlezr
arise
ahich
are
not
covered
sufficiently
for
the purshasr-r
‘s
purposes,
the
nc
rter shoal
d be
referred
to
the
General
electric
Coany.
Tc the
extCnt
rsqu2
red thc
produrts
descrhed
herein
neet applicable ANSI,
IFtE and
NEMA
standards;
nut
no suc
assurance
s
gIven
vth
respect
to lot-al
codes
and
ordinances
because
they
vary greatly.
3

GEI-90805
RATINGS
The NGV relay
potential units
available are
rated
at 69 to
240 volts,
50/60
cyc 1 Cs.
The contacts
will
make
and
carry
30
amperes
for
tripping duty.
The
interrupting
capabilities
for each
contact
for
repetitive
protective duty
are given
in Table
B.
The
target
units
are current operated
and have
a minimum
operating
rating
of
0.2 amperes
or
2.0
amperes.
The
contacts which are
not in
series
with target coils
will carry
three amperes
continuously.
TABLE
B
CONTACT
INTERRUPTING
ABILITY
Interruption Capabilit
Volts
(Amps)
Inductive**
48
DC
1.0
125 DC
0.5
250
DC
0.25
115 - 60 cycles
0.75
230
- 60 cycles
0.5
**Inductance
of
average
trip
coil.
The
non—inductive
ratings for
repetitive
protective
duty
are
approxi
mately 2-1/2
times ratings
shown in the
table.
CHARACTERISTICS
The
NGV
voltage
unit is a hinged
armature
unit
which drops
out
when
the
magnetic
pull
created by the
ampere—turns
in the operating
coil is
less than
the
force
of the opening
spring.
The
drop-out voltage
is changed
by
adjusting the
rheostat
and
the
voltage
range
is
given in Table
C.
TABLE
C
VOLTAGE RANGE
Rated
Volts
Range
of Dropout
Adjustment
69
40-
5P
120
70
- 100
208
121 - 173
240
140
- 200
4

GUI-
90805
The pickup
voltage
is
110
percent
or
less
of
the dropout
voltage.
On
any
drop
out
operation,
the
voltage
range
from
the
beginning
of the
action
to
its
completion
is
about
one
percent
of
rated
voltage.
The
relay
pickup time
is
approximately
two
cycles
and
the
dropout
characteristic
(voltage
against
time)
is
shown
in
Figure
9.
The
burden
of
the
voltage
unit
is
at
unity
power
factor
and
the
values
are
given
in
Table
D.
TABLE
D
BURDENS
Rated
Voltage
aximum
Burden, Watts
69
4
120
4.2
208
4.75
240
4.5
The
target
unit
coil
has
a
DC
resistance
of 7.5
ohms
for
the
0.2 ampere
unit
and
0.12
ohms
for
the
2
ampere
unit.
Internal
connections
of
the
various
relays
are
shown
in
Figures
3
through
8
and
12.
CONSTRUCTION
The
relay
components
are
mounted
in
a
cradle
assembly
which
is
latched
into
a
drawout case
when
the
relay
is
in
operation,
but
that
can
be
easily
removed
when
desired.
To
remove
the
relay
from
its
case,
first
disconnect
it
by
removing
the
connection
plug
that
completes
the
electrical
connections
between
the
case
block
and
the
cradle
block.
This
connection
block
can
be
replaced
by
a
test
plug to
test
the
relay
in
its
case.
The
cover,
which
is
attached
to
the
front
of
the relay
case,
contains
the
target
reset
mechanism
and
an interlock
arm
which
prevents
the
cover
from
being
replaced
until
the connection
plugs
have been
inserted.
The
relay
case
is
suitable
for
either
semi-flush
or
surface
mounting
on
all
panels
up to
two
inches
thick;
appropriate
hardware
is available.
However,
to
insure
that
proper
hardware
will
be
included,
panel
thickness
must
be
indicated
on
the relay
order.
For
outline
and drilling
dimensions,
see Figures
10 and
11.
Every
circuit
in
the
drawout
case
has
an
auxiliary
brush,
as
shown
in
Figure
1,
to provide
adequate
overlap
when
the
connecting
plug
is
withdrawn
or inserted.
Some
circuits
are
equipped
with
shorting
bars
(see
Figures
3-8)
and
on
these
circuits,
it is
especially
important
that
the
auxiliary
brush
makes
contact
with
adequate
pressure
as
indicated
in
Figure
1
to prevent
the
opening
of
interlock
circuits.
5

GE 1-90805
RECEIVING,
HANDLING AND
STORAGE
These relays, when
not included
as
part of a control panel, will
be
shipped in
cartons
designed to
protect them
against
damage.
Immediately upon receipt of
a
relay, examine
it for
any
damage
sustained
in
transit. If damage
resulting from
rough handling
is evident,
file
a damage claim at
once with thc
transportation
company and
promptly
notify the
nearest
General
Electric
Apparatus Sales Office.
Use
reasonable care when unpacking
the
relays.
If the
relays
are
not
to be
installed
immediately, store them in
their shipping
cartons
in
a place that is free
from
moisture, dust
and metallic chips.
Foreign matter
that has collected on the
outside
of the
case
could
get
inside
when the cover is
removed and cause problems in
the
operation of the relay.
Also check
the
nameplate
stamping to
insure
that the model number
and
the
rating
of
the relay
received
agree with the requisition.
Check the operation
manually, and check that the contact
gap
and wipe agree
with
values given
in
the
section
on ADJUSTMENTS AND
INSPECTION.
ADJUSTMENT AND INSPECT ION
MECHANICAL CHECK
Check the
relay for
mechanical operation before
installation
to see
that
it
operates smoothly and
that
the
contacts are
correctly
adjusted.
With the
relay
de-energized,
each
normally open
contact should have
a gap of
0.015 inch or more. Observe the wipe on
each normally closed
contacL
by
deflecting
the stationary
contact member
towards
the frame. Wipe should
be approximately 0.005
inch.
The
wipe
on
each
normally open
contact should be
approximately 0.005 inch.
Check by
inserting
a
0.005
inch shim
between the residual
screw and
the
pole
piece
and operating the armature
by
hand.
The normally open contacts
should make
before
the
residual
screw
strikes
the shim.
ELECTRICAL TEST
The relay
should
be
tested
before installation and
periodically
thereafter
by
connecting
a variable
source of voltage
at
rated
frequency
to the coil
studs and
checking
the pickup and
dropout
voltages. Use
the
variable
rheostat to the relay,
and if
necessary,
the residual
screw to adjust to the
values required.
Adjustment
of
the ratio of
pickup
to dropout is
made,
if
necessary,
with
the
residual screw;
in
most
applications
no
adjustment of this
ratio will
be
required.
A variable
source
of DC
power
should
be connected
to the
target
circuits, if
furnished,
and the
pickup
amperes checked.
6

GEI—90805
SERVICING
In
view
of the
vital
role
of
protective relays
in
the
operation
of
a
power
system
It
is
Important
to
follow
a
periodic
test
program.
The
Interval
between
periodic
checks
will
probably
vary
depending
upon
environment,
the
type
of
relay
and
the
user’s
experience
with
periodic
testing.
Until
the
user
has
accumulated
enough
experience
to
select
the
test
interval
best
suited
to
individual
requirements,
the
points
listed
under
ADJUSTMENT
AND
INSPECTION
should
be
checked
once
a
year.
A
flexible
burnishing tool
should
be
used
to clean
fine
silver
contacts.
This
tool
Is
an
etched-roughened
strip
of
flexible
metal,
resembling
In
effect
a
superfine
file,
that
will
remove
corroded
material
quickly
and
thoroughly
without
scratching
the
surface.
The
flexibility
of the
tool
insures
the
cleaning
of
the
actual
points
of
contact.
Knives,
files,
abrasive
paper or
cloth
should never
be
used
to
clean
fine
silver
contacts.
The
burnishing tool
described
above
can
be
obtained
from
the factory.
RENEWAL
PARTS
Sufficient quantities
of
renewal
parts
should
be carried
In
stock
for
prompt
replacement
of
any
parts
that
become
worn,
broken,
or
damaged.
When
ordering
renewal
parts,
address
the
nearest
Sales
Office
of
the
General
Electric
Company,
specify
quantity
required,
name
of
the
part
wanted,
and give
complete nameplate
data.
If
possible,
give
the
General
Electric
requisition
number
on which
the
relay
was
furnished.
13
13
17 10
Figure
3
(0195A4938—O)
Internal
Connections
Diagram
for
the NGV11A
Relay
(Front
View)
C
I—i
L
:i;
fl
I
I
N
I
I
(I
7

.LTR
GEE-90805
I,,
‘9
In
—i
I
j.
Figure
4 (0195A4939—2)
Internal
Connections
Diagram
for the
NGV11B
Relay
(Front View)
Q
ii
I—I
‘1
S
Figure
5 (0118A9182-1)
Internal
Connections
Diagram
for
the NGV12A
Relay
(Front
View)
8

Figure
6
(0195A4956-1)
Internal
Connections
Diagram
for
the NGV12B
Relay
(Front
View)
1
w
Figure
7
(0195A4940-4)
Internal
Connections
Diagram
for
the
NGV13A
Relay
(Front
View)
GE
1-90805
1)
1—i
4-
I
V
V
CI
WHEN
US
ED
MIEN
USED
/
F
r
6
*ShF[F
FINGER
9

_\/
V
V
GEt- 90805
H
—
IIIWT
-INGF
Figure
8
(0195A4941-O)
Internal
Connections Diagram
for the
NGV13B Relay
(Front View)
LINKS
SHOWN
WITH TARGET
IN CIRCUIT
1—2
2
46 8
10
OTHER
LINK
A_
B——C
D’
E 0 -
—F
WITH
TARGET
IN CIRCUIT
—4
POSITIONS
A-
B
- C
NC
TARGET
IN
CIRCUIT
;HORT
HNGERE
(F-RON
VIEW)
Figure
8A
(0275M380-1)
Internal
Connections
Diagram
for
the
NGV13B-Revision
A
Relay
(Front
View)
*
10

GE
1-90805
Figure
9
(0165A7560—2)
Operating
Time
Curves for
NGV
Relays
C-)
0
0
Cr\
C) 0
-4
11

PANEL DRILLING
FOR
SEMI—FLUSH
MOUNTING
FRONT VIEW
GE
1—90805
I 3.0
76MM
VIEW
S—LVING
ASSEMBLI GE HAPDWRL
FUR
SURFACE
MTG. [N
S[LL
PANELS
FIgure 10
(K—6209272
[71)
Outline and Panel Drilling
Dimensions
for Drawout
Relays
— Size
S2 Case
_____
6
625
____
- 168MM •
PANEL
LOCATION
SEMI -FLUSH
zc
5/16—18
STUDS
SURFACE
MTG.
10.312
261
MM
19 17 15
13
11
00000
00000
20
18 16 14
12
0—32
X
3/8
S
[RE V
S
GLASS
1/4 DRILL
STUD
NUMBER INC
29MM
:
97531
00000
00000
10 8 6
4 2
BACK VIEW
CUTOUTS
MAY REPLACE
DRILLED HOLES
CUT1UT
.218
5MM
144MM
.500
12MM
(TYPICAL)
TYPICAL DIM.
19MM
INCHES
MM
PANEL
DRILLING
FOR SURFACE
MOUNTING
FRONT VIEW
12

GE
1-90805
PANEL
DRILLING
FOR
SEMI--FLUSH
M[]UNTING
FRONT
VIEW
PANEL
DRILLING
FOR
SURFACE
MOUNTING
FRONT
VIEW
3.0
7€MM
VIEW
SHOWING
ASSEMBLY
OF
HARDWARE
FOR
SURFACE
MTG
ON
STEEL
PANELS
Figure
11
(K—6209271—8)
Outline
and
Panel
Drilling
Dimensions
for
Drawout
Relays
-
Size
Si
Case
•_
6625
168MM
PANEL
LOCATION
SEMI-FLUSH
HTG.
(2)
5/16—18
STUDS
FOR
SURFACE
MTG.
MTG
8.
375
212MM
GLASS
1
¶3.
L5
4.
11
1/4
1
0-32
S
[LiDS
DRILL
•
125
29MM
STUD
NUMBERING
6.
187
157MM
97531
00000
)0000
086
2
BACK
VIEW
5/8
DRILL
2
HOLES
L
C.
U
T1
UT
CUTOUT
MAY
REPLACE
DRILLED
HOLES
8.812
22
3MM
1. 15E
29MM
2.843
72MM
5
687
144MM
5.25
133MM
.500
12MM
(TYPICAL)
1 9MM
TYPICAL
DIM.
I
NCHES
MM
CASE
5/16-18
STUD
13

GEI—90805
*=SHORT
HNGER
Figure
12 (0178A7107-1)
Internal
Connections
Diagram
for
the NGV12C(.-)A
Relay
Since
the
last edition,
the
first
paragraph
of
SERVICING
and
Figure
10 have been
revised.
1,3
1f
L
14
T
A
I
17
19
18 20
CI
Q
HLI
tR
:i
*
68
14

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Management
215
Anderson Avenue
Markham,
Ontario
Canada L6E
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294-6222
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201-2098
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