ABB CO User Manual

Instruction
Leaflet
A
IIII
nm
»
ABB
Power
T
&
D
Company
Inc
.
Relay
Divisions
Coral
Springs
,
FL
33065
41
-
103
H
Type
CO
Circuit
Opening
Overcurrent
Relay
Effective
:
May
1984
Supersedes
I
.
L
41
-
103
G
,
Dated
June
1976
O
Denotes
Change
Since
Previous
Issue
CAUTION
ELECTROMAGNET
Before
putting
relays
into
service
,
remove
all
blocking
which
may
have been
inserted
for
the
purpose
of
securing
the
parts
during
shipment
,
make
sure
that
all
moving
parts operate
freely
,
inspect
the
contacts
to
see
that
they
are
clean
and close
properly
,
and
operate
the
relay
to
check
the
settings
and
electrical
connections
.
The
electromagnets
for
the
types
CO
-
5
,
CO
-
6
,
CO
-
7
,
CO
-
8
and
CO
-
9
relays
have
a
main
tapped
coil
located
on
the
center
leg
of
an
“
E
"
type
laminated
structure
that
produces
a
flux
which
divides
and
returns
through
the
outer
legs
.
A
shading
coil
causes
the
flux
through
the
left
leg
to
lag
the
main
pole
flux
.
The
out
-
of
-
phase
fluxes
thus
produced
in
the
air
gap
cause
a
contact
closing
torque
.
APPLICATION
The
electromagnets
for
the
types
CO
-
2
and
CO
-
ll
relays
have
a
main
coil
consisting
of
a
tapped
primary
winding
and
a
secondary winding
.
Two
identical
coils
on
the
outer
legs
of
the
lami
-
nation
structure
are
connected
to
the
main
coil
secondary
in
a
manner
so
that
the
combination
of
all
the
fluxes
produced
by
the
electromagnet
result
in
out
-
of
-
phase
fluxes
in
the
air
gap
.
The
out
-
of
-
phase
air
gap
fluxes
produced
cause
a
con
-
tact
closing
torque
.
These
induction
overcurrent
relays
are
used
to
disconnect
circuits
or
apparatus
when the
current
in
them
exceeds
a
given
value
.
When
no
suitable
station
battery
is available
,
the
circuit
opening
type
relay
in
conjunction
with
a
-
c
series
trip
coil
is
used
to
trip
the
circuit
breaker
.
CONTENTS
This
instruction
leaflet
applies
to
the
following
types
of
circuit
opening
relays
:
DE
-
ION CONTACTOR
SWITCH
(
CS
)
Type
CO
-
2
Short
Time
Relay
Type
CO
-
5
Long
Time
Relay
Type
CO
-
6
Definite
Minimum
Time
Relay
Type
CO
-
7
Moderately
Inverse
Time
Relay
Type
CO
-
8
Inverse
Time
Relay
Type
CO
-
9
Very
Inverse
Time
Relay
Type
CO
-
l
1
Extremely
Inverse
Time
Relay
This
switch
is
a
small
a
-
c
solenoid switch
whose coil
is
energized
from
a
small
transformer
connected
in
the
main
current
circuit
.
A
cylin
-
drical
plunger
operates
a
spring
leaf
arm
with
a
silver
contact
surface
on
one
end
and
rigidly
fixed
to
the
frame
at
the other
end
.
The
overcurrent
unit
contacts
are
in
the
con
-
tactor
switch
coil circuit
and
when
they
close
,
the
solenoid
plunger
moves
upward
to
open
the de
-
ion
contacts
which
normally
short
circuit
the
trip
coil
.
These
contacts
are
able
to
transfer
the
heavy
current
due
to
a
short
circuit
and
permit
this
cur
-
rent to
energize
the breaker
trip
coil
.
CONSTRUCTION
AND
OPERATION
The
type
CO
relays
consist
of
an
overcurrent
unit
(
CO
)
,
a
de
-
ion
contactor
switch
(
CS
)
.
an
op
-
eration
indicator
(
01
)
and
an
indicating
instan
-
taneous
trip
(
IIT
)
when
required
.
All
possible
contingencies
which
may
arise
during
installation
,
operation
or
maintenance
,
and
all details
and
variations
of
this
equipment
do
not
purport
to
be
covered
by
these
instructions
.
If
further information
is desired
by
purchaser
regarding
this
particular
installation
,
operation
or
maintenance
of
this
equipment
,
the local
ABB
Power
T
&
D
Co
.
Inc
.
representative
should
be contacted
.
Printed
in
U
.
S
.
A
.
Courtesy of NationalSwitchgear.com

ABB CO Specifications

General

Brand	ABB
Model	CO
Category	Relays
Language	English