GE PJV Series User manual

INSTRUCTIONS
INSTANTANEOUS D.C.
TYPE
PJV
GEK—
36767
MODEL
12PJV11BK(-)E
GENERAL
ELECTRIC
UNDERVOLTAGE
RELAY

GEK-36767
CONTENTS
PAGE
DESCRIPTION
3
APPLICATION
3
RATINGS
AND
BURDENS
3
CONTACT
RATINGS
3
TABLE
13
COIL CIRCUIT
RATINGS
AND
BURDENS
3
TABLE
2
4
CHARACTERISTICS
4
OPERATING
PRINCIPLES
4
PICKUP
AND
DROPOUT
DEFINITIONS
4
RELAY
CALIBRATION
4
PICKUP
VOLTAGE
4
TABLE
35
DROPOUT
TIME
5
CONSTRUCTION
5
PLUNGER
UNIT
5
OUTLINE
DIAGRAM
AND
INTERNAL
CONNECTIONS
DIAGRAM
5
CASE
5
RECEIVING,
HANDLING
AND
STORAGE
6
ACCEPTANCE
TESTS
6
VISUAL
INSPECTION
6
MECHANICAL
INSPECTION
6
ELECTRICAL
TESTS
7
INSTALLATION
PROCEDURE
7
LOCATION
7
MOUNTING
7
CONNECTIONS
7
ADJUSTMENTS
7
PERIODIC
CHECKS
AND
ROUTINE
MAINTENANCE
7
MECHANICAL
CHECKS
7
ELECTRICAL
CHECKS
8
SERVICING
8
RENEWAL
PARTS
8
2

GEK-
36767
DESCRIPTION
The
PJV11BK
relay
is
a
DC
operated
single
unit
instantaneous
undervoltage
device.
It
is intended
for
application
on
D.C.
systems to
detect short
circuits
that
reduce the system
voltage
below
the
drop
out
setting
on
the
relay.
The
PJV11BK
relay
comes
in an
SI-E
non-drawout
case.
However,
the
standard
plug
is
available
which
permits
disconnection
of
the
contact
circuits
from
the
front
of
the
relay.
The
outline
and
mounting
dimensions
for
the
relay
are
given
in
Figure
3.
The
outline
for
the
external
resistor
that
is
required
and
furnished
with
the
relay
is
given
in
Figure
8.
The
internal
connection
diagram
is
shown
in
Figure
2.
APPLICATION
The
PJV11BK
relay
is
designed
to
provide
high
speed
undervoltage
detection
on
D.C.
systems.
The
coil
circuit
of
this
relay
should
be
connected
to
the
portion
of the
D.C.
system
being monitored
without
regard
to polarity.
The
contacts
should
be
used
to initiate
the
desired action
on
low
voltage.
When
applying
this relay,
Table
3
should
be
consulted
to insure
that
the
relay
will
pick-up
for
normal
system
voltage
when
it
is
set
to drop
out
at
the
desired
value.
RATINGS
AND
BURDENS
CONTACT
RATINGS
The
contacts
are
rated
at 5
amperes
for
continuous
duty
and
at
30
amperes
for
tripping
duty.
The
interrupting
ratings
are
given
in Table
1.
TABLE
1
INTERRUPTING
RATINGS
AC
AMPS
VOLTS
TNDUCTIVE
NON-INDUCTIVE
115
2
5
230
1
2
460
0.5
1
DC
AMPS
VOLTS
INDUCTIVE
NON-INDUCTIVE
24
1.0
5
48
0.5
2
125
0.3
1
250
0.15
0.3
COIL
CIRCUIT
RATINGS
AND
BURDENS
These
relays
are
supplied
with
an
external
resistor
which
is
to
be wired
in
series
with
the
operating
cuil.
Ratings
and
burdens given
for
this
relay
are
for
the
operating coil
wired
in
series
with
the
external
resistor.
Table
2
gives
the
continuous
voltage
rating,
calibrating
range,
burden,
external
resistor
resistance,
and
operating
coil
resistance
for
these
relays.
These
nsttuCtiOfls
do
nOt
purport
to
cover
all
duta:ls
or
v,’’.jtcs,’
:0 a::im
.
nor
to
;rcv:dr
for
every
possi
Pie caltinyency
to
be riot in
connection
with
ncra,
,‘..t,.
In.
pr:
it0
Cr
eu:nt,-’rc.cn,,.
Sbouad
further
information
be
dosirod
or
should
particu
Ir
p’binru
rise w:
h
ar.’
yr
:.
v ci
Sut
fi:c’ntli
for
the
purchaser’s
purposes,
the
putt
tier
should
be referred
tic
thiS’S,
ri
,rie,
t r.
Comj’accy
-
ic
the
Cxtient
aequu
ted
the products
,ies,.
r
be,! herOun
usret
.ippf
c
-jhic
‘,!iJI,
tPEP
nd
NFL
ut
,aodards;
but no
such assurance
is
given
vi
ti
respect
to
lal
c-r,des
an,!
ird, ‘cances
tu’,Oau$C
the:,
vary grett4%.
3

GEK-36767
TABLE
2
RATING
CAL.
RANGE
BURDEN
WATTS
COIL
EXTERNAL
1
VOLTS
DC
DROPOUT VOLTS
AT
RATED
VOLTS
OHMS
RESISTOR
OHMS
700
280
-
580
67
345
7000
CHARACTERISTICS
OPERATING
PRINCIPLES
These
plunger
relays
operate
on
the principle
of
electromagnetic
attraction.
The
contacts
are
opened
or
closed
by
an
armature
which
is
drawn
up
vertically
into
a
solenoid.
An
external
resistor
is included
as
part
of
these
relays
to
be
connected
in
series
with the
operating
coil.
This
external
resistor
has
a
resistance
that
is
much
higher
than
that
of
the
operating
coil.
This
type of
circuit
prevents
self
heating
and
variations
in
ambient
temperature
from
having
an
appreciable
effect
on
relay operating voltage.
The
high
resistor
value
makes
changes
in
operating
coil
resistance
with
temperature
insignificant
in
terms
of
the
total
circuit
resistance.
PICKUP
AND
DROPOUT
DEFINITIONS
Pickup
voltage
is
defined
as
the
voltage
at
which
the normally
open
contacts
will
close
when
gadually
increasing
voltage
is
applied
to the
relay.
Dropout
voltage
s
the
voltage
at
which
the
normally
closed
contacts
will
close
when
the
applied voltage
is
gradually
decreased
from
some
level
of
voltage
above
pickup
voltage.
Reset
voltage
is
the
voltage
at
which
the
relay
will
assume
its
de—energized
position.
A
normally
open
contact
defined
as
a
contact
which
is open
when the relay is
completely
de—energized.
RELAY
CALIBRATION
These
relays
are calibrated
at
the
factory
for
dropout
volts.
Table
2
shows
the
calibrating
ranges
for
the various
operating
coil
—
external
resistor
combinations
used
in
these
relays.
Dropout
is
set
by
adjusting
the
vertical
position
of’
the armature
on
the plunger
rod.
The
four
factory
dropout
voltage
calibrations
appear
on
the
top of
the
nameplate
and
correspond
to the
scrihed
marks
on
the
calibrating
tube.
To
set
the relay
to dropout
at
one
of
the
factory
calibrated
voltages,
the
adjustable
armature
should
be
set
so
that
its
bottom
edge
just
lines
with
the
corresponding
scribed
marking
with
the
relay
plunger
in
its
de-energized
position.
The
scribed
mark
highest
on
the
calibrating
tube
(closest
to
the
coil)
corresponds
to the
lowest dropout
voltage
calibration
listed
on
the
nameplate
and
so
on.
The
factory
dropout
calibrations
are
the
voltage
t5
percent
at
which
the
relay
will
dropout
when
the
applied voltage
is
gradually
reduced.
When
these
relays
are
properly
adjusted,
they will
dropout
in
one
smooth
motion
to
the
reset position.
That is,
with
applied
voltage gradually
reduced,
the
relay
will
reset
within
two
percent
of the
voltage
at
which
the
normally
open
contacts
open.
PICKUP
VOLTAGE
Dropout
voltage
and
pickup
voltage
are
not
independently
adjustable.
The
relays will
pickup
at
a
percentage
of dropout
voltage
that
is
a
function
of the
dropout
voltage
setting.
For D.C.
operated
relays
wEth
two
normally
open
or
one
normally
open and one
normally
closed
contact,
pickup
will
occur
at
some
voltage
which
is
less
than
145
percent
of
set
dropout
voltage.
Tnis
percentage
will
cecrease
as
the
dropout
voltage
setting
is increased
as
shown
in
table
3.
4

GEK-36767
TABLE
3
PICKUP
VOLTAGE
AS A
FUNCTION
OF
DROPOUT VOLTAGE
SETTING
FOR
RELAYS
WITH
2
N.O.
OR
1
M.D.
AND
1
N.C.
CONTACT
VOLTAGE
DROPOUT
VOLTAGE
PICKUP
VOLTAGE
AT
PICKUP
VOLTAGE
RATING
CALIBRATION
POINTS
CALIBRATION
POINT
AT
CALIBRATION
MAXIMUM
POINT
TYPICAL
280
415 350
380
530
450
700
480 620
540
580
680 650
For
relays with
two
normally
closed
contacts,
pickup
will
be
approximately
160
percent
of
set
dropout
voltage.
DROPOUT
TIME
Figure
4
shows
a
typical
dropout
time
characteristic
curve
for
these
relays.
Figure
5
shows
a
typical
pickup
time
curve.
CONSTRUCTION
PLUNGER
UNIT
All
of the
PJV
relays
are
of
the
same
plunger
type
construction.
(Refer
to
Fig.
6).
The
adjustable
armature
is
mounted
on
the
threaded
portion
of
a
plunger
rod
which
carries
the
moving
contacts
upward
as
the armature
is
operated.
The
armature
is
drawn
upward
into
the coil
by
the
flux
created
in
the
rectangular
magnet
frame
and
a cylindrical
pole
piece
inside
the
coil.
Guides
for
the
plunger
rod
are
provided
at
the
top
by
a
hole in
the
pole piece,
and
at
the
bottom
by
the
fit
of
the
molded
contact
carrier
inside
the
calibration
tube.
Openings
in
the
sides
of
the
calibration
tube
allow
access
to
the
armature
to
adjust
pickup.
The
normally
closed
fixed
contacts
are
similar
to
the
normally
open
fixed
contacts
except
they
are
mounted below
the
moving
contact
instead
of
above it,
and
the
backstop
arm
is
omitted.
OUTLINE
DIAGRAM
AND
INTERNAL CONNECTIONS
OIAGRAM
Figure
2
of
this instruction
book
shows
the
internal
connections
diagram
for
the
PJVI1BK
relay.
Figure
4
shows
the
outline
and
panel
drilling
diagram.
Figure
8
shows
the
outline
of
the
external
resistor.
CASE
The
case
for
the
PJV11BK
relay has
two
special
high
voltage
studs
which
connect
directly
to
the
operating
coil.
These
insulated
studs
pass
directly
through
the
rear
of
the
case.
The relay
cannot
bc
drawn out
of
its
case without
removing
the connections
to
and dis—assembling
these
high
voltage
studs.
The
contact
circuits
of
the
relay
are
brought
out
through
the
standard
case
studs
labeled
one
through
ten
on
the
internal
connections
and
the
outline
diagram.
Tne
electrical
connections
between
the
case studs
and
the
cradle
mounted
relay unit
are
made
thrcug
spring
backed
contact
fingers
mounted in
stationary
molded
inner
and
outer
blocks
betwrcn
which
nests
a
removable
connecting
plug
which
completes
the
circuits.
The
contact
circuits
are
disconnected
when
his
plug is
removed,
but
the operating
coil
is
not
disconnected
by
removing
this
plug.
Figure
7
shows
the
high
voltage
stud
assembly
which
connects
to
the
ooerating
col.
This
assemb1
consists
of
two
threaded studs
which
are
mounted
on
a
compound
plate
attached
to
tne
cradle.
Each
threaded
stud
is
surrcunded
by
two
insulating
brushings,
one
inside
the
case
and
one
outside
the
case.
The
bushinq
that
fits
through
froii
outside
the
case
passes
entirely
througn the
inside
diameter
of
trio
bushing
that
is
inside
the
case.
The
diameter
of
the
portion
of
the
hushing
that
is
outside
the
case
is
su’i that
trio
cradle
cannot
be
drawn
out
without
first
disconnecting
the
leads
to
the
high
voltage
studs
and
tnen
pulling
the
insulating
bushings
off
of
the
studs.
S

GEK—JbJbi
The
relay
mechanism
is mounted
in
a
steel
framework
called
the
cradle
and
is
a
complete
cnit.
This
cradle
is
held
firmly
in
the
case
with
a
latch at
the
top and
the
bottom
and
by
a
guide
pinat
the
back
of
the
case.
The cases
and
cradles
are
so
constructed
that
the
relay
cannot
be
inserted
in
the
case
upside
down.
The
connecting
plug,
besides
making
the
electrical
connections
between
the
respective
blocks
of the
cradle
and
case,
also
locks
the
latch
in
place.
The
cover,
which
is
fastened
to
the case
by
thumbscrews,
holds
the
connecting
plug
in
place.
To draw
out
the
relay
unit
the
cover
is
first
removed,
and
the
connecting
plug
drawn
out.
The
external
connections
to the
high
voltage
studs
are
then
disconnected
and
the
insulating
bushings are
then
pulled
off
the
rear
of
the
studs.
The relay
unit
can
then
be
easily
drawn
out
after
the
latches
have
been
released.
To
replace
the
relay
unit,
the
reverse order
is
followed
making
certain that
the
insulating
bushings
have
been
replaced
on
the
high
voltage
studs.
These
bushings
do not
allow
the
removal
of
the
relay
unit with
the
external
connections
intact.
The
case
is
suitable
for
either
surface
or
semi-flush
panel
mounting
and
an
assortment
of
hardware
is provided
for either
mounting.
The
cover
attaches
to the
case.
Each
cover
screw
has
provision
for
a
sealing
wire.
RECEIV1NG
HANDLING
AND STORAGE
These
relays,
when
not
included
as
a
part
of
a
control
panel, will
be
shipped
in
cartons
designed
to
protect
them
against
damage.
tmmediately
upon
receipt
of
a
relay,
examine
it
for
any damage
substained
in
transit.
If
injury
or
damage
resulting
from
rough
handling is
evident,
file
a
damage
claim
at
once
with
the transportation
company
and
promptly
notify
the
nearest
General
Electric
Apparatus
Sales
Office.
Reasonable
care
should
be
exercised
in
unpacking
the
relay
in
order
that
none
of
the parts
are
injured
or
the
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
met3llic
chins. Foreign
matter
collected
on
the
outside
of
the
case
may
find
its
way
inside
when
the
cover
is
removed
and
cause
trouble
in
the
operation
of
the
relay.
ACCEPTANCE
TESTS
Immediately
upon
receipt
of
a
relay
an
inspection
and
acceptance
test
should
be
made
to
insure
that
no
damage
has
been
sustained
in
shipment
and
that
the
relay
calibrations
have
not been
disturbed.
VISUAL
INSPECTION
Check
that
the
nameplate
stamping
to insure
that
the
moael
number,
rating
and calibration
range
of
the relay
received
agree
with
the
requisition.
Examine
the relay
by
visual inspection
that there
are
no
broken
or
cracked
molded
parts
or
other
signs
of
physical
damage,
and
that
all
screws
are tight.
Also
check
to
see that
the
flexible
moving
con
tact
leads
extend
striaght
back
from
the
contacts
and
have
not been
deformed.
MECHANICAL
INSPECTION
It is
recommended
that
the following
mechanical
adjustments
be
chccked:
1.
Operate
the
plunger
on
each
unit
by
hand and
allow
it
to
reset
to
insure
that
the
unit
is free
from
friction
or
binds.
If
two
nomally
open
contacts
are
i:resent,
observe
that
with
one
contact
just
making
there
is
less
than
1/64
inch
gap on
the other
contact.
2.
me wipe
on
a
normally
open
or
closed
contact
should
be
approximately
3/64
mci.
The
normally
open
contact
gap
with
the
armature
fully reset
should
be
approximately
3/32 inch
for
either
contact
arrangement.
Backstops
should
be
present
above
all
normally
open
contacts
only.
The
gap
between
the backstop
and
contact
brush
at
the
tip should
be
approximately
1/16
with
the
armature
reset.
6

GEK-36
767
ELECTRICAL
TESTS
1.
DROPOUT
AND
PICKUP
- The
units
are
normally
supplied
from
the
factory with
the
bottom
of
the armature
aligned
with
the top
mark
on
the
calibration
tube.
This
corresponds
to
the
minimum
dropout calibration
point
given on
the
nameplate.
It
should
be
sufficient
to
check
dropout
and
pickup
of
each
unit
at
this
setting.
To
test
the
relay for
proper
operation,
it
is
preferable
to
connect
the
relay
in
series
with
the
external
resistor
to a
variable
D.C. supply. A
contact indicating
light or
ohmmeter conncted
to
a
normally
open contact
will indicate
on
pick-up.
Similarly,
an
indication
on
a
normally-closed
contact
indicates
drop-out
when
the
voltage
s
lowered from
the
picked-up
condition.
Reset
must
be
checked
visually.
To
simply check
for
operation
but
not
for
calibration, a
D.C.
supply
of
not over
35
volts can
be
connected
directly
to
the
relay without
the
resistor.
Check for
smooth
operation
of
plunger
when
operating
the
relay.
INSTALLATION
PROCEDURE
LOCATION
The
location should
be
clean
and
dry,
free
from
dust
and
excessive
vibration,
and
well
lighted
to
facilitate
inspection
and
testing.
MOUNT
IN
C
The
relay
should
be
mounted
on
a
vertical
surface.
The
outline
end
panel diagram
is
shown
in
Figure 3.
The
outline diagram
for
the
external
resistor
is
s,own in
Figure
8.
CONNECTIONS
Internal
connection
diagram
is
shown
in
Figure 2.
One
of
the
mounting
studs or
screws should
be
permanently
grounded
by
a
conductor
not
less
than
No.
12
B&S
gage
‘opper wire
or
its
equivalent.
ADJ
(JSTMENTS
The
plunger
unit
should
be
manually
operated
to
make
sure
that
th.
assembly
is
working smoothly
and
not
binding.
It
is
desirable
that
the
final
setting
of
the
required
dropout
voltage
be
performed
with
the
relay
in
its
case
and
mounted
in
its
permanent
location
iid
with
the
relay
wired
to
the
external
resistor
with
which
it will
be
used.
The
required
dropout
voltage
may
be
set
as
follows.
With
the
relay
de-energized
turn
the
bottom
of
the
knurled armature
to
the
approximate
position
on
the tube
corresponding
to
the
desired
dropout
setting.
With
a
variable
source
of
D.C.
voltage
apply sufficient
voltage
to
the
relay
to
pick it
up.
Gradually
decrease
the
applied voltage
and
note
the
voltag2
at
which
the
rlay
L,35
out.
If
dropout
is
too
low,
turn
the
armature
to
ride
lower in
th.
:‘librating
tube,
if
dropout is
too
high,
turn
the
armature
to
ride
lower.
Once
dropout
voltage
is
set,
check pickup
voltage
by
gradually
increasing
the
applied voltage
with
the
unit
dropped
out.
Pickup
votage
should
be
as
described
in
the
C
oacteristics
section.
PERIODIC
CHECKS
AND
ROUTINE
MAINTENANCE
in
view
of the
vital
role
of
protective
relays
in
the
ope
a.cn
of
a
power
sy;te,
t
is
important
that
a
periodic
test
program
be
followed.
Unless otherwise
dictatoi by
unusual
environeental
conditions,
it
is
recommended
that
the
following
points
be
cheked
at
an
interval
of
from
one
to
two
years.
MECHANICAL
CHECKS
Manually
operate the
voltage unit
armature
and
allow
it
to
reset
to
make
sure
that
a
no
excessive
friction
or
tendency
to
bind.
7

GEK—36767
Check
to
see that
the
contacts
have
approximately
3/64
inch
wipe
and
that
the
normally
open contacr.
gap
is
approximately
3/32 inch
with
the
armature
reset.
Check
to
see
that
the
back
Stops
on
the
normally
open
contact
ar
approximately
1/16
inch
above
the
stationary
contact
tips.
Examine
the
contact
surfaces
for
signs
of
tarnishing
or
corrosion.
Silver
contacts
should
be
cleaned
with
a
burnishing
tool,
which
consists
of
a
flexible
strip
of
metal,
with
an
etched,
roughened
surface.
Burnishing
tools
designed
especially
for
cleaning
relay contacts
can
be
obtained
from
the
factory.
Do
not
use
knives,
files
or
abrasive
paper or
cloth
of
any
kind
to
clean
relay
contacts.
ELECTRICAL
CHECKS
Check
the
dropout
and
pickup
voltage
of
the
relay
as
described
in
the
installation
section.
It
is
not
recormiended
that
the
relay
be
readjusted
when
minor setting
variations
from
the
previous
that are
noted,
as
long
as
the
relay
is
still
within
limits.
Such
deviation
can
be
introduced
by
differences
in
test
equipment
or
by
human
error.
SERVICING
1.
Friction
If
there
is
any tendency
to
bind
or
excessive
friction
is
present,
check
to
see that
the
armature
does
not have
a
tendency
to
rotate
and
bind
as
the
relay
operates.
If
it
does,
the
flexible
leads
to
the
moving
contacts
are
not
formed
properly.
Also
check
that
no
foreign matter
is
present
between
the
armature
and
calibrating
tube.
2.
Moving
Contact
Leads
-
The
flexible
moving
contact
leads
should
be
formed
to
keep
the
moving
assembly
centrally
located.
If
these
moving
contact
leads
have been
deformed,
they should
be
reshaped
as
follows:
The
lead
should
have
a
right angle
bend
when
it
leaves
the
tail
of
the
moving
contact
button,
this
bend
should
be
vertical
with
the lead
going
down
for a normally
open
contact
and
up
for
a
normal]”
closed
contact.
The
lead
should
then
flow
in
a
smooth
arc
to the
terminal
screw
on
the
molded
base.
The
whole
lead
should
lie
in
a
vertical
plane
and
not blow
out
horizontally.
Binding
will
stop
when
the leads
are
formed
correctly
providing
the
relay
is
not
binding
due
to
foreign matter
or
bent
moving
parts.
3.
See
the
acceptance
tests
and
installation
sections
for
contact
gap and
wipe
adjustments.
Gaps and
wipes
are
adjusted
by
forming
or
bending
the
stationary
contacts.
4.
Fixed
Contact
Initial
Tension
The
stationary
contact
normally
rests
on
a
member
called
the
contact
stop
arm.
Initial
tension
is
the
face
applied
to the contact
tip
which
is
necessary
to
part
the
contact
from
its
stop
arm.
This
face
may
be
measured
with
a
gram
gauge.
If
contacts
are replaced
or
readjusted
for
wipe or
gap, initial
tension
should
be
checked.
When
only
one
normally
closed
contact
is used,
the
initial
tension
on
this
contact
should be
about
14
grams.
In
this
arrangement the
normally
open
contact
should
have
about
five
grams
initial
tension.
For
all
cther
contact
codes,
all
contacts
should
have about
five
grams
initial
tension.
RENEWAL
PARTS
It
is
recomended
that
sufficient
quantities
of
renewal
parts
be
carried
in
stock
to
enable
the
prompt
replacement
of
any
that
are
worn, broken
or
damaged.
When
ordering
renewal
parts,
address the
nearest
Sales
Office
of
the
General
Electric
Company,
specify
quantity required,
name
of
part
wanted,
and
give
complete
nameplate
data, including
serial
number.
If
possible,
give the
General
Electric
Company
requisition
number
on
which
the
relay
was
furnished.
8

GFK—35757
FIG.
1
(Photo
Not
Available)
Type
PJV1IBK(-)E
Relay
Out
Of
Case-Front
View
9

GEK—36767
COCE
NI’MPFP
20
02
LLL
TTT
2!
22
‘\1
-----EZTh---
EXTEP’AL
RESI
STOP
*
S!OPT
FI3C-EPS
MA(E DOTtED
7 CC*’NFCTIOt1S
IF
/‘
!HORTING
FARS
ARE
PEUIRED
NOTE:
141G[1
VftTAGE
SThDS
(2! &
22)
PROJECT
THROUGH
REAP CF
CASE.
LEADS A’D
ftSHINGS VST
FE
RFHOVED
FRO!A
ThESE
SIUDS
REFORE CRADLE
Cfl
FE
W:THDPM.
FIG.
2
(0245A3667—1)
Internal
Connections
Diagram
For
Model
PJV11BK(—
n
2 e
IC
10