ABB 511 Series - Page 2

IB
-
7.2
.
1.7
-
1
PAGE
2
SOLID
-
STATE
OVERCURRENT
RELAYS
INSTRUCTIONS
FOR
CIRCUIT
-
SHIELD
®
SOLID
-
STATE
RELAYS
DRAWOUT
SEMI
-
FLUSH
MOUNTED
SINGLE
PHASE
,
TWO
PHASE
,
AND
THREE
PHASE
TABLE
OF
CONTENTS
3
.
Be
sure
the
trip
circuit
is
interrupted
by
an
"
a
"
contact
to
remove
high
currents
from
solid
-
state
output
circuits
.
Solid
-
state
output
circuits
have
inherently
high
momentary
current
ratings
and
low
continuous
current
ratings
.
Never
exceed
the
ratings
.
4
.
When
applying
input
current
to
protective
relays
,
be
sure
to
interrupt
the
input
current
immediately
after
the
relay
operates
.
5
.
Load
(
trip
coils
or
auxiliary
relays
)
must
draw
at
least
0.10
amps
to
insure
operation
.
SCR
'
s
require
a
minimum
current
to
remain
conducting
after
triggering
.
Parallel
a
resistance
with
a
low
current
coil
to
guarantee
the
holding
current
,
if
necessary
.
6
.
Do
not
attempt
to
manually
operate
target
vanes
on
CIRCUIT
-
SHIELD
overcurrent
relays
.
Although
the
targets
return
their
indication
under
shock
,
they
can
be
damaged
by
manual
operation
with
a
pencil
or
pointed
object
.
7
.
Do
not
apply
high
voltage
tests
to
solid
-
staie
relays
.
If
a
control
wiring
insulation
test
is
required
,
bond
all
terminals
together
and
disconnect
ground
wire
before
applying
test
voltage
.
8
.
Besuretonotetheconnectionstoterminals
9
,
10
,
and
11
(
described
under
CONNECTIONS
on
page
3
)
required
for
the
proper
operation
of
the
TIME
and
INSTANTANEOUS
elements
.
Jumper
links
are
supplied
with
all
relays
.
9
.
Only
the
lower
circuit
ooard
of
the
CIRCUIT
-
SHIELD
overcurrent
relay
is
removable
.
This
board
should
insert
smoothly
.
Do
not
use
force
.
10
.
Note
that
removal
of
the
tap
block
pin
is
equivalent
to
setting
the
highest
tap
.
11
.
Follow
test
instructions
to
verify
that
the
relay
is
in
proper
working
order
.
CAUTtON
:
Since
troubleshooting
entails
working
with
energized
equipment
,
caution
should
be
taken
to
avoid
personal
shock
.
Only
competent
technicians
familiar
with
good
safety
practices
should
service
these
devices
.
Introduction
Precautions
Placing
Relay
into
Service
Testing
While
in
Service
Application
Data
Calibration
and
Acceptance
Testing
Pg
.
2
Pg
.
2
Pg
.
3
Pg
.
3
Pg
.
4
Pg
18
INTRODUCTION
These
instructions
contain
the
information
required
to
properly
install
,
operate
,
and
test
the
complete
line
of
Type
51
solid
-
state
overcurrent
relays
.
The
CIRCUIT
-
SHIELD
overcurrent
relay
is
housed
in
a
semi
-
flush
drawout
relay
suitable
for
conventional
panel
mounting
.
All
connections
to
the
relay
are
made
at
terminals
located
on
the
rear
of
the
case
and
clearly
numbered
,
one
(
1
)
through
twelve
(
12
)
.
CURRENT
,
TIME
,
and
INST
,
pickup
controls
are
lo
-
cated
on
the
front
panel
behind
a
removable
clear
plastic
cover
.
TIME
and
INST
,
target
indicators
are
also
mounted
on
the
front
panel
.
Both
targets
are
reset
by
means
of
a
pushbutton
extending
through
the
relay
cover
.
PRECAUTIONS
The
following
precautions
should
be
taken
when
applying
solid
-
state
relays
:
1
.
Incorrect
wiring
may
result
in
damage
to
solid
-
state
relays
,
Be
sure
wiring
agrees
with
the
connection
diagram
for
the
particular
relay
before
the
relay
is
energized
.
Be
sure
control
power
is
applied
in
the
correct
polarity
before
applying
control
power
.
2
.
Apply
only
the
rated
control
voltage
marked
on
the
relay
front
panel
.
Unlike
conventional
relay
contacts
,
solid
-
state
outputs
are
rated
for
a
particular
control
voltage
.
If
rectified
AC
voltage
is
used
in
place
of
a
battery
,
proper
filtering
will
be
required
to
insure
SCR
"
Holding
Current
"
.
Courtesy of NationalSwitchgear.com