ABB CRN-1 Manual

Instruction
Leaflet
ABB
Power
TAD
Company
Inc
.
Relay
Division
Coral
Springs
,
FL
33065
Aim
M
»
l
»
I
.
L
.
41
-
251.21
A
Type
CRN
-
1
Reverse
Power
Relay
(
50
and
60
Hz
for
Class
1
-
E
Applications
)
Effective
:
March
1996
Supersedes
I
.
L
.
41
-
251.21
,
dated
January
1984
(
|
)
Denotes
Change
Since
Previous
Issue
The
type
CRN
-
1
relay
is
a
single
phase
directionally
controlled
timing
relay
used
to
protect
ac
generators
from
motoring
.
When
such
a
condition
occurs
and
persists
for
a
predetermined
time
interval
,
the
gener
-
ator
may
be
tripped
or an
alarm
sounded
.
The
CRN
-
1
may
also be
used
to
sense
lagging
power
factor
load
flow
in
an
abnormal
direction
.
The direc
-
tional
unit has
30
deg
.
maximum
torque
characteris
-
tics and
the timer
unit is
adjustable
from
approximately
2
to
40
seconds
.
These instructions
are
supplementary
to
I
.
L
.
41
-
251.2
and
relate
to
type
CRN
-
1
Relays
which
are
recommended
for
Class
1
E
applica
-
tions
.
Refer
to
I
.
L
.
41
-
251.2
for
details
on con
-
struction and
operation
of
this
relay
.
CAUTION
Before
putting
relays
into service
,
remove
all
blocking
which
may
have been inserted
for
the
purpose
of
securing
the
parts
during
ship
-
ment
,
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
connec
-
tions
.
2
.
CONSTRUCTION
AND
OPERATION
Certain
units
of
these
relays
have
been
specially
designed
to meet
the
fragility
requirements
of
a
seis
-
mic environment
.
In
most
cases
,
the
construction
is
similar
to
the
non
-
seismic
units
except
spring
restraint is
greater
and
therefore
more
power
is
required
to
make them
operate
.
The
timer unit is
similar
to
Type
CV
relay
described
in
I
.
L
.
41
-
201.4
.
1
.
APPLICATION
These
relays
have been
specially designed
and
tested
to
establish their
suitability
for
Class
1
E
appli
-
cations
in
accordance
with
the
ABB
Power
T
&
D
Company
program
for
Class
1
E
Qualification
Testing
as
detailed
in
bulletin
STR
-
1
.
The
CV
units
contain
a
special
shield
covering
the
spring
,
located above the disc
,
to
prevent
the
spring
from
contacting grounded
elements
during
extreme
vibrations
.
The
ICS
has
a
single
operate
rating
and
requires
special
calibration
procedures
to
make
it
less sensi
-
tive
to
vibration
.
The
internal
schematic
of
the
CRN
-
1
is
shown
in
figure
1
.
“
Class
1
E
”
is the
safety
classification of
the electric
equipment
and
systems
in
nuclear
power
generating
stations that
are
essential
to
emergency
shutdown
of
the
reactor
,
containment isolation
,
cooling
of
the
reactor
,
and heat removal
from
the
containment and
reactor
,
or
otherwise
are
essential
in
preventing
sig
-
nificant
release
of
radioactive
material
to
the environ
-
ment
.
2.1
.
CV
UNIT
A
spring
shield
covers
the
reset
spring
of
the
CV
unit
.
To
remove
the
spring
shield
,
requires
that
the
damp
-
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
Company
Inc
.
representative
should
be
contacted
.
Courtesy of NationalSwitchgear.com

I
.
L
41
-
251.21
A
fingers
do
not
touch the
yoke
in
the
reset
position
(
viewed
from
top
of
switch between
cover
and
frame
)
.
This
can
be
done
by
loosening
the
mounting
screw
in
the
molded
pedestal
and
moving
the
ICS
in
the
downward
position
.
ing
magnet
be
removed
first
.
The
screw
connection
holding
the lead
to
the
moving
contact
should
be
removed
next
.
The
second
screw
holding
the
moving
contact
assembly
should
then
be
loosened
not
removed
.
(
CAUTION
:
this
screw
terminates
into
a
nut
held
captive
beneath the
molded
block
.
If
screw
is removed
,
difficulty
will
be
experienced
in
the
reassembly
of
the
moving
contact
assem
-
bly
.
)
Slide
the
spring
shield
outward and
remove
from
relay
.
Tighten
the
screw
holding
the
moving
con
-
tact
assembly
to
the
molded block
.
a
.
Contact
Wipe
-
Adjust
the
stationary
contact
so
that both
stationary
contacts
make
with
the
mov
-
ing
contacts
simultaneously
and
wipe
1
/
64
’
to
3
/
64
’
when the
armature
is
against
the
core
.
b
.
Target
-
Manually
raise
the
moving
contacts
and
check
to
see
that the
target
drops
at
the
same
time
as
the
contacts
make
or
up
to
1
/
16
”
ahead
.
The
cover
may
be removed
and
the tab
holding
the
target
reformed
slightly
if
necessary
.
How
-
ever
,
care
should
be
exercised
so
that
the
target
will
not
drop
with
a
slight
jar
.
2.2
.
INDICATING CONTACTOR
SWITCH
(
ICS
)
2.2
.
1
.
Rating
Ampere
Pickup
Ohms
dc Resistance
0.2
8.5
1.0
0.37
2.0
0.10
c
.
Pickup
-
The
unit
should
pickup
at
98
%
rating
and
not
pickup
at
85
%
of
rating
.
If
necessary
,
the
cover
leaf
springs
may
be
adjusted
.
To lower the
pickup
current
use a
tweezer
or
similar
tool and
squeeze
each
leaf
spring
approximately
equal
by
applying
the
tweezer
between
the
leaf
spring
and
the
front
surface
of
the
cover
at
the
bottom
of
the
lower
window
.
2.2
.
2
.
Settings
There
are no
settings
to
make
on
the
indicating
con
-
tactor
switch
(
ICS
)
.
2.2
.
3
.
Routine
Check
Close
the main
relay
contacts
and
pass
sufficient
dc
current
through
the
trip
circuit
to
close the
contacts
of
the
ICS
.
This
value
of
current
should
not
be
greater
than the
particular
ICS
nameplate
rating
.
The
indica
-
tor
target
should
drop
freely
.
If
the
pickup
is
low
,
the
front
cover
must
be
removed and the
leaf
spring
bent
outward
equally
.
3
.
RENEWAL
PARTS
Repeat
above
except
pass
85
%
of
ICS
nameplate
rating
current
.
Contacts
should
not
pickup
and
target
should
not
drop
.
Repair
work
can
be done
most
satisfactorily
at
the
factory
.
However
,
interchangeable
parts
can
be
fur
-
nished
to
the
customers
who
are
equipped
for
doing
repair
work
.
When
ordering
parts
always give
the
complete nameplate
data
.
2.2
.
4
.
Adjustment
and
Calibration
Initially adjust
unit
on
the
pedestal
so
that
armature
2
Courtesy of NationalSwitchgear.com

I
.
L
41
-
251.21
A
RELAY
-
TYPE
CRN
-
1
-
REVERSE
POWER
-
SINGLE
TRIP
IN
TYPE
FT
21
CASE
(
FOR
CLASS
IE
APPLICATION
)
INTERNAL
SCHEMATIC
TIMER
UNIT
INDICATING
CONTACTOR
SWITCH
ICS
DIRECTIONAL
UNIT
jicsjcv
CV
D
±
i
°
CHASSIS
OPERATED
SHORTING
SWITCH
LI
RED
HANDLE
TEST
SWITCH
CURRENT
TEST
JACK
O
O
6
r
o
oo
©©
7
I
TERMINAL
©
©
©
+
FRONT
VIEW
WITH
RELATIVE
INSTANTANEOUS
POLARITY
AS
SHOWN
,
THE
DIRECTIONAL
CONTACTS
CLOSE
*
Sub
2
3528
A
06
Figure
1
:
Internal
Schematic
of
the
Type
CRN
-
1
Relay
3
Courtesy of NationalSwitchgear.com

CRSE OUTLINE
1
*
594
(
40.49
)
-
6
*
063
(
154.00
)
.
569
(
14.30
)
5
*
219
(
132.56
)
%
*
<
L
10.438
(
265.13
)
i
SEMI
-
FLUSH
MTG
.
PflNEL
LOCHTION
-
3.168
(
80.98
)
1
|
6.375
-
(
161.93
)
4
HOLES FOR
.
190
-
32
MTG
.
SCREWS
.
250
DIR
.
(
6.35
)
5.563
(
141.30
)
2.781
(
70.64
)
CRSE
\
I
f
t
LRRGE
INTERNRL
RND
EXTERNRL
TOOTH
WRSHER
.
190
-
32
SCREW
9.688
(
246.08
)
9.063
(
230.20
)
4.531
-
4
(
115.09
)
1
SMFLL
EXTERNRL
TOOTH
NRSKER
4.844
(
123.04
)
/
\
PR
4
EL
.
125
R
(
3.18
)
-
2.938
(
74.63
)
5.875
(
149.23
)
PBNn
PRILLING
AND
CUTOUT
FOR
SEMI
-
FLUSH
MTG
.
*
Sub
2
3519
A
66
Figure
2
:
Outline
and
Drilling
Plan
for
the
Type
CRN
-
1
Relay
in
Type
FT
-
21
Case
A
mi
MPIP
ABB
Network
Partner
ABB
Power
T
&
D
Company
Inc
.
4300
Coral
Ridge
Drive
Coral
Springs
Florida
33065
954
-
752
-
6700
FAX
:
954
-
345
-
5329
Printed
in
U
.
S
.
A
.
Courtesy of NationalSwitchgear.com