Cutler-Hammer Digitrip RMS 610 User manual

I
.
L
.
29
-
886
A
Cutler
-
Hammer
Instructions
for
Digitrip
RMS
610
Trip
Unit
RESULT
FROM
CONTACT
WITH
ENERGIZED
EQUIP
-
MENT
.
ALWAYS
VERIFY
THAT
NO
VOLTAGE
IS
PRESENT
BEFORE
PROCEEDING
WITH
THE
TASK
,
AND
ALWAYS
FOLLOW
GENERALLY
ACCEPTED
SAFETY
PROCEDURES
.
CUTLER
-
HAMMER
INC
.
IS
NOT
LIABLE
FOR
THE
MISAPPLICATION
OR
MISIN
-
STALLATION
OF
ITS
PRODUCTS
.
It
is
strongly
urged
that
the
user
observe
all
recommen
-
dations
,
warnings
and
cautions
relating
to
the
safety
of
personnel
and
equipment
,
as
well
as
all
general
and
local
health
and
safety
laws
,
codes
,
and
procedures
.
The
recommendations
and
information
contained
herein
are
based
on
experience
and
judgment
,
but
should
not
be
considered
to
be
all
-
inclusive
or
covering
every
appli
-
cation
or
circumstance
which
may
arise
.
If
you
have
any
questions
or
need
further
information
or
instructions
,
please
contact
your
local
representative
,
or
the
Customer
Support
Center
for
the
type
of
circuit
breaker
you
have
.
Circuit
Breaker
Type
DS
/
DSL
SPB
Series
C
R
-
Frame
Page
Table
of
Contents
1.0
General
Description
-
RMS
610
Trip
Unit
System
...
.
1
1.1
Basic
RMS
610
Trip
Unit
1.1
.
1
Operational
Status
and
TRIP
Indicators
1.1
.
2
General
Over
-
Current
Protection
1.1
.
3
Discriminator
(
Making
Current
Release
)
.
.
.
1.1
.
4
OverRIDe
(
Fixed
Instantaneous
)
TRIP
1.1
.
5
Zone
Interlocking
1.2
Four
-
Character
Information
Display
Window
1.2
.
1
Values
Displayed
During
Normal
Service
..
.
1.2
.
2
Messages
for
ALARM
or
TRIP
Conditions
.
.
1.2
.
2.1
“
ROM
Error
...
See
I
.
L
”
1.3
Rating
Plugs
,
Frame
Ratings
,
Sensor
Ratings
1.4
Power
/
Relay
Module
1.5
Auxiliary
Power
Module
2.0
UL
Listed
Devices
3.0
Protection
Settings
3.1
General
3.2
Long
Delay
Current
Setting
3.3
Long
Delay
Time
Setting
3.4
Short
Delay
Current
Setting
3.5
Short
Delay
Time
Setting
3.6
Instantaneous
Current
Setting
3.7
NO
Instantaneous
Current
Setting
3.8
Ground
Fault
Current
Setting
3.9
Ground
Fault
Time
Delay
Setting
4.0
Test
Procedures
4.1
General
4.2
When
to
Test
4.3
Testing
Provisions
4.4
Conducting
Tests
4.4
.
1
Not
Tripping
the
Breaker
4.4
.
2
Tripping
the
Breaker
4.5
Testing
Back
-
up
Battery
-
Inside
Rating
Plug
4.5
.
1
Back
-
up
Battery
Check
4.5
.
2
Replacing
the
Back
-
up
Battery
5.0
References
5.1
Digitrip
RMS
Trip
Unit
Assemblies
5.2
DS
/
DSL
Low
-
Voltage
AC
Power
Ckt
.
Breakers
....
19
5.3
SPB
Systems
Pow
-
R
Circuit
Breakers
5.4
Series
CR
R
-
Frame
Molded
Case
Ckt
.
Breakers
...
.
19
Lists
of
Figures
,
Tables
,
and
Appendices
1
.
.
.
2
2
4
4
7
7
7
7
8
8
11
12
12
12
12
13
13
13
Send
to
Call
13
FAX
Telephone
Number
(
412
)
937
-
6029
(
412
)
937
-
6029
(
412
)
937
-
6490
14
Number
(
412
)
937
-
6396
(
412
)
937
-
6396
(
412
)
937
-
6010
14
14
15
15
15
16
1.0
GENERAL
DESCRIPTION
-
DIGITRIP
RMS
610
TRIP
UNIT
16
16
17
1.1
Basic
Digitrip
RMS
610
Trip
Unit
The
Digitrip
RMS
610
,
illustrated
in
Fig
.
1
,
is
a
Trip
Unit
,
suitable
for
use
in
types
DS
and
DSL
Low
-
Voltage
AC
power
circuit
breakers
and
type
SPB
Systems
Pow
-
R
cir
-
cuit
breakers
and
Series
C
R
-
Frame
molded
case
circuit
breakers
.
The
Digitrip
RMS
610
Trip
Unit
provides
four
basic
functions
:
Function
Protection
Information
Monitors
Current
Testing
Digitrip
RMS
610
provides
true
RMS
current
sensing
for
proper
correlation
with
thermal
characteristics
of
conduc
-
tors
and
equipment
.
Interchangeable
rating
plugs
are
provided
to
establish
the
continuous
current
rating
of
18
18
18
18
19
19
19
Section
1.1
.
2
-
1.1
.
5
and
3
1.1
.
1
and
1.2
19
1.2
.
1
WARNING
4
DO
NOT
ATTEMPT
TO
INSTALL
OR
PERFORM
MAIN
-
TENANCE
ON
EQUIPMENT
WHILE
IT
IS
ENERGIZED
.
DEATH
OR
SEVERE
PERSONAL
INJURY
CAN
E
;
T
"
N
Effective
May
1997
Supersedes
I
.
L
.
29
-
886
dated
September
1994
Courtesy of NationalSwitchgear.com

I
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.
29
-
886
A
Page
2
each circuit breaker
.
The
Digitrip
RMS
610
Trip
Unit is
designed
for
use
in
industrial circuit
breaker
environ
-
ments
where the
ambient
temperatures
can
range
from
-
20
C
to
+
85
C
and
rarely
exceed
70
to
75
C
.
If
,
however
,
temperatures
in
the
neighborhood
of
the
Trip
Unit do
exceed
this
range
,
the
Trip
Unit
performance
may
be
degraded
.
In
order
to
insure that
the
tripping
function
is
not
compromised
due
to
an over
-
temperature
condition
,
the
Digitrip
RMS
610
microcomputer
chip
has
a
built
-
in
over
-
temperature
protection
feature
,
factory
set to
trip
the
breaker
if
the
chip
temperature
exceeds
95
C
.
If
over
-
temperature
is the
reason
for
the
trip
,
the
Long
Delay
Time
LED will
light
“
RED
”
,
and
the word
“
TEMP
”
will
appear
in
the
display
window
.
The
Trip
Unit
employs
the
Cutler
-
Hammer
Inc
.
custom
designed
integrated
circuit
Sp
RE
+
chip
,
which
includes
a
micro
-
computer
to
perform
its
numeric and
logic
functions
.
The
principle
of
operation
is
described
by
the block
diagram
shown
in
Fig
.
2
.
In
the
Digitrip
RMS
610
Trip
Unit
,
all
required
sensing
and
tripping
power
to
operate
its
protection
function
is
derived
from
the
current
sensors
in
the circuit
breaker
.
The
secondary
currents
from
these
sensors
provide
the
correct
input
information
for
the
protection
functions
,
as
well
as
tripping
power
,
whenever the circuit
breaker is
carrying
current
.
These
current
signals
develop
analog
voltages
across
the
appropriate
calibrating
resistors
including
:
1
)
Phase
currents
2
)
Ground
current
or
Neutral
current
(
when
supplied
)
3
)
Rating
plug
The
resulting analog
voltages
are
digitized by
the
custom
designed
integrated
circuits
.
The
micro
-
computer
,
in
cyclic
fashion
,
repeatedly
scans
the
voltage
values
across
each
calibrating
resistor and
enters
these
values
into
its
Random
Access
Memory
(
RAM
)
.
These
data
are
used
to
calculate
true
RMS
current
values
,
which
are
then
repeatedly
compared
with
the
protection
function
settings
and
other
operating
data
stored
in
the
memory
.
The
software
program
then
determines whether
to
initiate
protection
functions
,
including tripping
the
breaker
through
the low
energy
trip
device
(
Flux
Transfer Shunt
Trip
or
Direct
Trip
Actuator
)
in
the circuit breaker
.
1.1
.
1
Operational
Status
and
Protection
TRIP
Indicators
The
“
Green
”
Light
Emitting
Diode
(
LED
)
in
the lower
right
corner
of
the
Trip
Unit
(
Fig
.
1
)
“
blinks
”
once
each second
to
indicate the
Trip
Unit
is
operating normally
.
Note
:
If
the
LED
is
steadily
“
GREEN
”
,
i
.
e
.
not
blink
-
ing
,
the
Trip
Unit
is
not
ready
.
Check
the
120
VAC
control
power
to
the
Power
/
Relay
Module
,
if
the
LED
is
not
blinking
.
(
See
Section
1.4
.
)
The
LEDs
,
shown
in
Figs
.
1
and
3.1
thru
3.6
on
the
face
of
the
Trip
Unit
,
light
“
RED
”
to
indicate the
reason
for
any
automatic
trip
operation
.
As indicated
in
Figs
.
3.1
-
3.6
,
each
LED
is
strategically
located
in
the related
segment
of
the time
-
current
curve
depicted
on
the
face of
the
Trip
Unit
.
The
reason
for
trip
is
identified
by
the
segment
of
the
time
-
current
curve
where the
LED
is
lighted
“
RED
”
,
and shown
by
the
“
code
”
in
the
Display
.
Following
an
automatic
protection trip
operation
,
the external control
power
to
the
Power
/
Relay
Module
(
See Section
1.4
)
will
maintain
the
LED
“
RED
”
and
will
continue
to
send
a
TRIP
signal
to
LOCKOUT
the
circuit breaker
until the
Trip
Unit is
RESET
.
The
Digitrip
RMS
610
Trip
Unit
can
be
RESET
by
pressing
and
releasing
the
“
TRIP
RESET
”
button
.
(
See
Fig
.
1
lower
right
corner
just
above
the
“
UNIT
STATUS
”
LED
.
)
In
the
event
that control
power
is
lost
,
the back
-
up
battery
in
the
Rating
Plug
(
See
Section
1.3
and
Figs
.
1
and
4
)
continues
to
supply
power
to
the
LEDs
.
To check
the
sta
-
tus
of
the
battery
,
see
Section
4.5
.
Note
:
The
Digitrip
RMS
610
performs
all
of
its
protec
-
tion
functions
regardless
of
the
status
of
the
battery
.
The
battery
serves
only
to
maintain
the
indication
of
the
reason
for
automatic
trip
.
Press
and
release
the
“
TRIP
RESET
”
push
-
button
shown
in
Fig
.
1
,
to turn
“
Off
”
the
LEDs
following
a
trip
operation
.
1.1
.
2
General Over
-
Current
Protection
The
Digitrip
RMS
610
Trip
Unit
is
completely
self
-
con
-
tained
and when the
circuit
breaker
is
closed
,
requires
no
external
control
power
to
operate
its
protection
sys
-
tems
.
It
operates
from
current
signal
levels and
control
power
derived
through
current
sensors
integrally
mounted
in
the
circuit breaker
.
The
Digitrip
RMS
610
Trip
Unit is
available
in
six
different
types
.
Each
Trip
Unit
may
be
equipped
with
a
maximum
of five
phase
and
two
ground
(
time
-
current
)
settings
(
See
Section
3
)
to
meet
specific
application requirements
.
The
protection
available
for
each
type
is
summarized
in
Table
1
,
and
illustrated
in
Figures
3.1
through
3.6
:
F
:
T
*
N
Effective
5
/
97
Courtesy of NationalSwitchgear.com

I
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L
.
29
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886
A
Page
3
Fig
.
1
Digitrip
RMS
610
Trip
Unit
Type
LSIG
with
Rating
Plug
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2
RMS
Digitrip
610
Trip
Unit
-
Block
Diagram
E
;
T
*
N
Effective
5
/
97
Courtesy of NationalSwitchgear.com

I
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L
.
29
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886
A
Page
4
Protection
Functions
Type
Figure
Discriminator
will
trip
the circuit breaker
instantaneously
,
the
“
OVERRIDE
/
DIS
”
LED
will
light
“
RED
”
,
and the
Dis
-
play
will
read
“
DISC
”
.
In
the
event
the breaker
is
not
intended
to
trip
out
on a
circuit whose
current
could
initially
be
higher
than
1 1
x
1
it
is
possible
to
make
the Discriminator
inactive
.
If
a
circuit breaker
would close
onto
a
high
short
-
circuit
current
,
when the
Discriminator is inactive
,
type
LS
or
LSG
Trip
Units
will
wait
for
the
short
-
time
delay
setting
before
tripping
.
If
the
fault
current
exceeds
the
short
-
time
withstand
current
capability
of
the
circuit breaker
,
the
OverRIDe
protection
function
will
trip
the breaker
without
delay
.
(
See
Section
1.1
.
4
.
)
Also
,
please
see
Section
1.1
.
5
for
other
exceptions
when
Zone
Interlocking
is
employed
.
The
Discriminator
(
high
initial
current
release
)
can
be
made inactive
by
turning
the
“
OVERRIDE
/
”
setting
switch
(
nearest
the
bottom
edge
of
the
Trip
Unit
)
from
the
“
DIS
”
position
,
to
the
“
[
blank
]
”
position
.
(
See
Figs
.
3.2
and
3.5
)
Notes
:
This
switch has
eight
(
8
)
positions
,
and
seven
(
7
)
of
the
positions
show
“
D
/
S
”
in
the
window
,
ONLY
ONE
position
shows
“
[
blank
]
”
.
When the
“
OVERRIDET
window
shows
“
[
blank
]
”
,
the
only
fast
-
acting
high
short
-
circuit
protection
avail
-
able is the
OVERRIDE
(
Fixed
Instantaneous
)
.
(
See
Section
1.1
.
4
.
)
Long
Time
/
Instantaneous
Long
Time
/
Short
Time
Long
Time
/
Short
Time
/
Instantaneous
LSI
*
3.3
Long
Time
/
Instantaneous
/
Ground
LIG
3.4
Long
Time
/
Short
Time
/ Ground
Long
Time
/
Short
Time
/
Instantaneous
/
Ground
LI
*
3.1
LS
*
3.2
rv
LSG
3.5
LSIG
3.6
NOTE
*
:
RMS
Digitrip
Type
LI
,
LS
and
LSI
Trip
Units
can
be
applied
on
3
-
pole
or
4
-
pole
circuit
breakers
for
protection
of
the
neutral circuit
,
IF
the
circuit
breaker
is
wired
and
MARKED
for
NEUTRAL
PROTECTION
.
Refer
to
the
National Electric
Code for
appropriate
application
of
4
-
pole
breakers
.
NOTICE
AFTER
EACH
TRIP
OPERATION
THE
AUTOMATIC
LOCKOUT
AFTER
-
TRIP
FEATURE
OF
THE
DIGITRIP
RMS
610
TRIP
UNIT
MAINTAINS
THE
CIRCUIT
BREAKER
IN A
“
TRIP
-
FREE
”
CONDITION
,
PRO
-
VIDED
120
VAC CONTROL POWER
REMAINS
AVAIL
-
ABLE
TO
THE
POWER /
RELAY
MODULE
.
THE TRIP
UNIT
MUST
BE
RESET
.
BEFORE
THE
CIRCUIT
BREAKER
CAN
BE
CLOSED
AGAIN
.
THE
RESET
CAN
BE
ACCOMPLISHED
BY
PRESSING
AND
RELEASING
THE
“
TRIP
RESET
’
PUSH
BUTTON
.
(
SEE
FIG
.
1
.
)
After
an over
-
current
trip operation
,
the
following
informa
-
tion
is stored
in
the
Trip
Unit
memory
:
•
the
cause
of
trip
,
•
the
values
of
currents
thru the
breaker
at
time
of
trip
.
1.1
.
3
Discriminator
(
High
Initial
Current
Release
)
(
For
Types
LS
and
LSG
Trip
Units
only
)
When the
Digitrip
RMS
610
Trip
Unit is
not
equipped
with
an
adjustable
instantaneous
protection
setting
,
i
.
e
.
types
LS
or
LSG
,
a
Discriminator
circuit
(
or
high
initial
current
release
)
is
provided
.
The
non
-
adjustable
release
is
pre
-
set at
eleven
(
11
)
times the
installed
rating
plug
cur
-
rent
(
ln
)
.
The
Discriminator
is
enabled
for
approximately
ten
(
10
)
cycles
following
the initial
current
flow
through
the
circuit breaker
,
provided
the
load
current
exceeds
approximately
10
%
of
the
circuit
breaker
frame
(
or
cur
-
rent
sensor
)
rating
.
Should
the
load
current
through
the
circuit breaker
drop
to
less
than
the
10
%
value
,
the
release
will
reset
.
The
release
,
once
reset
will
remain
enabled
until the
load
current
passing
through
the circuit
breaker
has
exceeded
the
10
%
value
for
10
cycles
.
The
1.1
.
4
OVERRIDE
(
Fixed
Instantaneous
)
Each
Digitrip
RMS
610
Trip
Unit has
a
Fixed Instanta
-
neous
“
Override
”
analog
trip
circuit
automatically
pre
-
set
to
a
value
no
greater
than
the
short
-
time withstand
cur
-
rent
rating
of
the
circuit
breaker
in
which
the
Trip
Unit is
installed
.
Since
the
specific
values
vary
for different
cir
-
cuit
breaker
types
and
ratings
,
refer
to
time
-
current
curves
,
listed
in
Section
5
,
for
the
values
applicable
to
your
breaker
.
If
breaker
trips
due
to
high
instantaneous
current
,
the
“
OVERRIDE
/
”
LED
will
light
“
RED
”
,
and the
display
will
read
“
ORID
”
.
F
;
T
'
N
Effective
5
/
97
Courtesy of NationalSwitchgear.com

I
.
L
.
29
-
886
A
Page
5
TABLE
1
-
DIGITRIP
RMS
610
PROTECTION
FUNCTIONS
Trip
Unit
TYPE
RMS
DIGITRIP
610
5
SS
6
6
6
1
2
3
L
LL
I
SS
5
S
S
6
6
6
4
5
6
L
LL
I
S
S
GG
I
Refer
to
I
.
L
.
Section
Number
Catalog
Number
I
G
Suffix
Number
61
62
63
64
65
66
Instruction
Leaflet
No
.
I
.
L
.
29
-
886
Long
-
Time
Delay
Protection
Adj
.
Current
Setting
(
Pick
-
up
)
Adj
.
Time
Delay
Setting
Long
Time
Memory
XXX
XXX
XXX
XXX
XXX
XXX
3.2
3.3
3.3
High
Load
Alarm
ALARM
Indication
at
Trip
Unit
Remote
ALARM
Signal
Contacts
XXX
XXX
XXX
XXX
Table
3
1.3
Short
-
Time
Delay
Protection
Adj
.
Current
Setting
(
Pick
-
up
)
Adj
.
Time
Delay
Setting
Opt
.
“
I
squared
T
'
Curve
Shape
Opt
.
Zone
Interlocking
X
X
XX
XX
X
X
X
X
X
X
X
X
X
X
3.4
3.5
3.5
1.1
.
5
Instantaneous
Protection
Adj
.
Current
Setting
(
Pick
-
up
)
DISCriminator
(
11
x
)
IN
or
OUT
OverRIDe
(
>
short
time
current
rating
)
X
X
X
X
3.6
X
X
1.1
.
3
1.1
4
11
11
1
1
Neutral
Current
Protection
111
n
n
n
Ground
Fault
Protection
Adj
.
Current
Setting
(
Pick
-
up
)
Adj
.
Time
Delay
Setting
Opt
.
“
I
squared
V
Curve
Shape
Opt
.
Zone
Interlocking
Ground
Fault
Time
Memory
XXX
XXX
XXX
XXX
XXX
3.8
3.9
3.9
1.1
.
5
3.9
Trip
Unit
Over
-
Temp
.
TRIP
XXX
XXX
1.1
Fig
.
3.1
Digitrip
RMS
610
Type
LI
Auto
Lock
-
Out
after
TRIP
1.1
.
2
c
c
cc
cc
LED
Indicators
on
TRIP
Unit
:
Trip
Unit
Status
(
OK
=
Blinking
)
Long
-
Time
Delay
TRIP
Short
-
Time
Delay
TRIP
XXX
XXX
XX
XXX
XXX
X
X
1.1
.
2
1.1
.
2
1.1
.
2
INStantaneous
TRIP
OverRIDe
/
DISCriminator
TRIP
Ground
Fault
TRIP
X
X
X
X
1.1
.
2
1.1
.
2
XX
XXX
1.1
.
2
XXX
Rating
Plug
Back
-
up
Battery
Status
XXX
4.5
XXX
XXX
Integral
Test
Provision
4
POWER
/
RELAY
MODULE
Output
Signal
Contacts
:
XXX
XXX
1.4
Long
-
Time
Delay
TRIP
XXX
XXX
1.4
Short
-
Circuit
TRIP
(
includes
any
of
:
)
•
Short
-
Time
Delay
TRIP
•
INStantaneous
TRIP
•
OverRIDe
/
DISCriminator
TRIP
XXX
XXX
1.4
Ground
Fault
TRIP
Neutral
Current
ALARM
High
LoaD
ALARM
XXX
1.4
1
4
XXX
XXX
XXX
1.4
x
=
Function
included
tor
this
trip
unit
c
=
120
VAC
Control
Power
required
to
maintain
Lockout
n
=
Circuit
Breaker
must
be
equipped
for
Neutral
Protection
*
=
“
DISCriminator
”
is
also
called
“
Making
Current
Release
"
1
=
n
/
a
tor
Type
DS
Breakers
“
blank
"
=
Function
n
/
a
for
this
trip
unit
LEGEND
Fig
.
3.2
Digitrip
RMS
610
Type
LS
F
:
T
*
N
Effective
5
/
97
Courtesy of NationalSwitchgear.com

I
.
L
.
29
-
886
A
Page
6
Fig
.
3.5
Digitrip
RMS
610
Type
LSG
Fig
.
3.3
Digitrip
RMS
610
Type
LSI
(
IB
I
«
?
»
1
S
510
.
A
S
!
Catalog
Humttet
\
c
0
I
1
3
H
Littitam
Battry
Owy
IW
*
WC
1
JK
1
;
Long
Delay
Time
U
«
Q
Oetev
Sarong
H
®
8
C
"
*
AT
V
6
>
!
r
Snort
Delay
Settrny
‘
h
8
rejNt
«
Trro
»
AT
61
&
SFT
Iasi
Amps
6
n
«
i
Fault
Setting
>
«
:
•
#
Snert
Delay
CPC
Fast
!
Time
I
S
*
6
MP
7
*
?
gn
*
H
4
i
Fig
.
3.6
Digitrip
RMS
610
Type
LSIG
Fig
.
3.4
Digitrip
RMS
610
Type
LIG
F
:
T
>
N
Effective
5
/
97
Courtesy of NationalSwitchgear.com

I
.
L
.
29
-
886
A
Page
7
1.1
.
5
Zone
Interlocking
Zone
Selective
Interlocking
(
or
Zone
Interlocking
)
is
avail
-
able
(
See
Fig
.
2
)
for
Digitrip
RMS
Trip
Units
having
Short
Delay
and
/
or
Ground
Fault
protection
.
Zone
Selective
Interlocking
provides
the
fastest
possible
tripping
for
faults
within
the
breaker
’
s
zone
of
protection
,
and
yet
also
provides
positive
coordination
among
all
breakers
in
the
system
(
mains
,
ties
,
feeders
and
downstream
breakers
)
to
limit
the
outage
to
the
affected
part
of
the
system
only
.
When
Zone
Interlocking
is
enabled
,
a
fault
within
the
breaker
’
s
zone
of
protection
will
cause
the
Trip
Unit
to
:
•
Trip
the
affected
breaker
instantaneously
,
and
•
Send
a
signal
to
upstream
RMS
Digitrip
Trip
Units
to
restrain
from
tripping
immediately
.
The
restraining
signal
causes
the
upstream
breakers
to
follow
their
set
coordination
times
,
so
that
only
the
minimum
ser
-
vice
is
disrupted
,
while
the
fault
is
cleared
in
the
shortest
time
possible
.
This
signal
requires
only
a
single
pair
of
wires
from
the
output
terminals
of
the
downstream
breaker
’
s
Trip
Unit
,
to
the
input
terminals
of
the
upstream
breaker
’
s
Trip
Unit
.
For
specific
instructions
see
the
applicable
connection
diagrams
for
your
breaker
listed
in
Section
5
.
Note
:
If
a
breaker
(
M
)
receives
a
Zone
Interlocking
signal
from
another
breaker
(
F
)
that
is
tripping
,
but
the
fault
current
level
is
less
than
the
setting
for
breaker
(
M
)
,
the
presence
of
the
Zone
Interlocking
signal
from
the
other
breaker
(
F
)
can
not
cause
breaker
(
M
)
to
trip
.
1.2
.
1
Values
Displayed
During
Normal
Service
The
alpha
-
numeric
display
window
provides
current
val
-
ues
under
normal
service
conditions
and
coded
mes
-
sages
after
an
alarm
condition
or
after
an
over
-
current
trip
operation
.
The
four
“
Green
”
LEDs
below
the
display
window
indicate
which
value
of
current
is
being
dis
-
played
.
The
value
in
the
display
window
indicates
the
present
value
of
the
parameter
whose
LED
is
lighted
“
Green
”
.
In
Fig
.
1
,
the
four
“
Green
”
LEDs
identify
which
current
(
kA
)
value
is
being
displayed
,
i
.
e
.
phase
A
current
(
lA
)
,
phase
B
current
(
lB
)
,
phase
C
current
(
lc
)
,
ground
current
(
lG
)
,
or
current
in
the
fourth
pole
(
neutral
)
(
lD
)
.
During
the
normal
service
conditions
,
with
the
circuit
breaker
closed
,
the
Digitrip
610
serves
as
an
ammeter
,
displaying
the
individual
phase
currents
(
lA
,
lB
,
lc
)
and
ground
current
(
lG
)
or
the
fourth
pole
(
neutral
)
current
(
lD
)
,
provided
the
circuit
breaker
is
set
up
for
ground
or
fourth
pole
protection
.
Current
values
are
displayed
in
kA
.
The
value
displayed
is
current
in
the
pole
(
or
ground
)
indi
-
cated
by
the
“
Green
”
LED
that
is
turned
“
On
”
.
Press
and
release
the
(
Black
)
“
STEP
”
push
-
button
to
view
the
val
-
ues
of
current
in
the
other
phases
.
(
See
Fig
.
1
.
)
The
range
,
accuracy
and
wave
shape
parameters
for
current
values
displayed
are
:
RANGE
:
5
%
to
100
%
of
Frame
Rating
for
Series
CR
R
-
Frame
or
Type
SPB
circuit
breakers
,
or
5
%
to
100
%
of
[
Current
]
Sensor
Rating
for
Type
DS
circuit
breakers
.
ACCURACY
:
±
2
%
of
Frame
Rating
for
Series
CR
R
-
Frame
or
Type
SPB
circuit
breakers
,
±
2
%
of
[
Current
]
Sensor
Rating
for
Type
DS
circuit
breakers
.
WAVE
SHAPE
:
Sinusoidal
,
ref
.
IEC
947
-
2
Appendix
F
(
Harmonic
content
included
for
True
RMS
reading
)
1.2
.
2
Messages
Displayed
After
ALARM
or
TRIP
After
an
ALARM
condition
or
circuit
breaker
TRIP
opera
-
tion
occurs
,
one
of
the
coded
messages
listed
in
Table
3
will
appear
in
the
display
window
,
provided
control
power
is
still
available
for
the
Power
/
Relay
Module
(
See
Section
1.4
)
.
When
an
ALARM
condition
occurs
,
the
operator
has
time
to
take
action
,
such
as
reducing
the
load
,
to
correct
the
situation
.
The
message
will
remain
in
the
display
win
-
dow
until
the
“
STEP
”
push
-
button
(
See
Fig
.
1
)
is
pressed
and
released
,
then
the
message
will
disappear
and
the
values
of
currents
(
kA
)
at
the
present
time
can
be
viewed
in
the
window
.
or
CAUTION
IF
ZONE
INTERLOCKING
IS
NOT
TO
BE
USED
(
I
.
E
.
STANDARD
TIME
-
DELAY
COORDINATION
ONLY
IS
INTENDED
)
,
THE
ZONE
INTERLOCKING
TERMINALS
MUST
BE
CONNECTED
WITH
JUMPER
WIRES
,
AS
SPECIFIED
ON
THE
CONNECTION
DIAGRAMS
FOR
YOUR
BREAKER
(
SEE
SECTION
5
)
,
SO
THE
TIME
DELAY
SETTINGS
WILL
PROVIDE
THE
INTENDED
COORDINATION
.
For
examples
of
how
Zone
Selective
Interlocking
may
be
used
,
See
Appendix
A
.
Four
Character
Information
Display
Window
The
four
-
digit
alpha
-
numeric
display
window
,
illustrated
in
Figs
.
1
and
2
,
serves
two
basic
purposes
:
instrumenta
-
tion
and
mode
of
trip
and
trouble
indication
.
The
informa
-
tion
displayed
in
the
window
is
listed
in
Tables
2
and
3
.
1.2
F
:
T
-
N
Effective
5
/
97
Courtesy of NationalSwitchgear.com

I
.
L
.
29
-
886
A
Page
8
Note
:
Press
and
release
the
“
STEP
”
push
button
sev
-
eral
times
to
be
sure
you
see
the values
of
all
the
cur
-
rents
.
The
first
value
you
see
may
not
be the
greatest
.
Following
a
circuit
breaker
TRIP
operation
,
the
display
window
indicates
the
reason
for
trip
,
using
coded
mes
-
sages
such
as
,
INST
(
Instantaneous
Trip
)
,
LDT
(
Long
Delay
Trip
)
,
etc
.
As
with
the
ALARM
function
,
press
and
release the
“
STEP
”
push
button
to
clear the
reason
for
trip
message
and the
display
window
will
then show
the
values
of
current at
the time
of
trip
.
(
See
notes
(
1
)
,
(
2
)
and
(
3
)
under
Table
3
.
)
The
values
remain
in
memory
,
and the
“
red
”
reason
for
Trip
LED
(
See
Figs
.
1
and
3.1
-
3.6
)
remains
lighted
,
until the
Trip
Unit
is
reset
by
pressing
and
releasing
the
‘
TRIP
RESET
”
push
-
button
in
the lower
right
corner
of
the
Trip
Unit
.
(
See
Fig
.
1
.
)
Note
:
Be
sure
to
RECORD
all
values
of
interest
,
note
which
“
RED
”
LEDs
are
lighted
,
and
correct
the
cause
of
the
overload
or
fault
BEFORE
YOU
RESET
the
Trip
Unit
.
The
LOCKOUT
after
trip
feature
requires
the
Trip
Unit
to
be
reset
before
the breaker
can
be closed
again
.
For
examples
of
how
to
interpret
the
display
after
an
overload and
after
a
short
-
circuit
,
see
Appendix
B
.
TABLE
2
-
DIGITRIP
RMS
610
INFORMATION
FUNCTIONS
Trip
Unit
TYPE
RMS DIGITRIP
610
5
S S
6 6 6
1
2
3
L L L
I
S S
5
S
S
6 6
6
4
5
6
L
L
L
I
S S
G G
Refer
to
I
.
L
.
Section
Number
Catalog
Number
l
G
Suffix
Number
61 62
63
64 65
66
Instruction
Leaflet
No
.
I
.
L
.
29
-
886
4
-
Character
LED
Display
XXX
XXX
1.2
Current
Values
:
1.2
.
11
Phase
A
Current
[
la
]
(
kA
)
Phase
B
Current
[
lb
]
(
kA
)
Phase
C
Current
[
lc
]
(
kA
)
XXX
XXX
XXX
XXX
XXX
XXX
Ground
Current
[
Ig
]
(
kA
)
Neutral
Current
[
Id
]
(
kA
)
XXX
1.2
.
1 1
n n n
Local
Messages
:
TABLE
3
DISC
=
DlSCrimmator
Trip
GNDT
=
GrouND
Trip
X X
XXX
HILD
=
High
LoaD
Alarm
INST
=
INStantaneous
Trip
LDPU
=
Long
-
Time
Delay
Pick
-
U p
XXX
X X
XXX
XXX
X
X
XXX
LDT
=
Long
-
Time
Delay
Trip
ORID
=
OverRIDe
Trip
XXX XXX
1
1
1
1
1
ORNG
=
OverRaNGe
Trip
PLUG
=
Rating
PLUG
Problem
SDT
=
Short
-
Time
Delay
Trip
XXX
XXX
X X
XXX
XXX
X
X
TEMP
=
OverTEMPerature
Trip
TEST
=
TEST
ready
t o
begin
XXX
XXX
XXX
XXX
I
TABLE
3
LEGEND
:
X
=
Function
Included
n
=
Circuit
Breaker
must
be
equipped
for
Neutral Protection
1
=
n
/
a
tor
Type
DS
Breakers
1.2
.
2.1
ROM
Error
.
.
.
See
I
.
L
.
If
you
see
the
message
,
“
ROM
Error
...
See
I
.
L
.
”
,
scrolling
across
the
display
window
,
it
means
that
a non
-
fatal
error
has been detected somewhere
in
the
Trip
Unit
’
s
memory
.
The condition is
not
serious
,
and the
Trip
Unit
will
still
function
to
protect
the circuit
,
but
the
published
Time
-
Cur
-
rent
Curve
tolerances
may
be
exceeded
in
some cases
by
as
much
as
12
%
.
It
is
not
necessary
to
trip
and lock
out
the breaker
;
however
,
the
Trip
Unit should
be
replaced
at
the
earliest
opportunity
.
There
may
also be
errors
in
values
of
current
displayed
,
and
they
could be
even
greater
than
12
%
.
The
scrolling
message
will
not
remain
in
the
window
constantly
,
and
you
can
read
present
values
of
parameters
at
any
time
by
pressing
and
releasing
the
“
STEP
”
push
button
,
as
you
normally
would
.
The
message
will
automatically
reappear
every
few
minutes
,
and
further
,
every
time
you
press
and
release
the
“
TRIP
RESET
”
push
button
,
the
message
will
also
be
displayed
,
to
remind
you
to
replace
the
Trip
Unit
at
your
earliest
opportunity
.
Frame
Rating
,
Sensor
Rating
(
where
applica
-
ble
)
and
Rating Plugs
The Frame
Rating
of
a
circuit breaker
is the
maximum
RMS
current
it
can
carry
continuously
.
The maximum
Short
-
Circuit Current
Ratings
of
the circuit
breaker
are
usually
related
to
the Frame
Rating
as
well
.
It
is
often
times desirable
to
be
able
to
choose
a
current
value
(
ln
)
,
less than
the
full
frame
rating
,
to
be
the basis
for
the
coordination
of
the
circuit
breaker
’
s
protection
functions
,
without
affecting
its short
-
circuit
current
capa
-
bility
.
For the
Digitrip
RMS
610
Trip
Unit
the
maximum
continuous
current
(
ln
)
is
set
by
the
Rating
Plug
(
and
/
or
Current
Sensors
,
where
applicable
)
—
see
Section
5
for
specific
instructions
for
your
circuit
breaker
type
.
The
(
Current
)
Sensor
Rating
(
where
applicable
)
is the
maximum
RMS
current
the
circuit breaker
can
carry
with
the
specified
current
sensors
installed
.
The
Sensor
Rat
-
ing
can
be the
same or
less
than the
Frame
Rating
,
but
not
greater
.
The
Rating Plug
(
See
Fig
.
4
)
fits
into
a
special
cavity
to
complete
the
Trip
Unit
(
See
Fig
.
1
)
.
1.3
E
;
T
'
N
Effective
5
/
97
Courtesy of NationalSwitchgear.com

I
.
L
.
29
-
886
A
Page
9
TABLE
3
-
DIGITRIP
RMS
610
TRIP
UNIT
MESSAGE
CODES
AND
THEIR
MEANINGS
MESSAGE
MEANING
COMMENT
SEC
.
DISC
DISCriminator
Trip
1
(
High
Initial
Current
Release
)
GrouND
-
fault
Jr
ip
-
4
Breaker
tripped
instantaneously
because
phase
current
exceeded
11
x
rating
plug
current
ln
Value
Breaker
tripped
because
ground
current
exceeded
Ground
Fault
protection
settings
Phase
current
has
exceeded
85
%
of
Long
-
Time
Current
Setting
for
more
than
40
seconds
11
3
GNDT
3
8
.
3
9
HILD
High
LoaD
Alarm
ALARM
:
Nearing
Overload
Condition
App
x
B
Casei
INST
INStantaneous
Jripu
'
%
Breaker
tripped
instantaneously
because
phase
current
exceeded
instantaneous
protection
setting
Phase
current
has
exceeded
Long
-
Time
current
setting
.
Trip
unit
is
timing
to
trip
breaker
.
36
LDPU
Long
-
Time
Delay
Pick
-
Up
ALARM
:
Overload
Condition
in
Progress
Long
-
Time
Delay
Trip
4
(
Overload
Trip
)
QverRIDe
Trip
'
3
3.2
LDT
Breaker
tripped
because
phase
current
exceeded
Long
-
Time
protection
settings
Breaker
tripped
instantaneously
because
phase
current
exceeded
short
-
time
rating
of
circuit
breaker
Breaker
tripped
instantaneously
because
phase
current
(
or
ground
current
)
exceeded
28
x
rating
plug
current
ln
value
.
Rating
Plug
is
missing
,
damaged
,
or
not
well
connected
.
If
breaker
is
closed
,
it
will
trip
,
and
the
instantaneous
/
override
LED
will
light
.
If
breaker
is
open
,
it
will
not
close
.
Protection
functions
still
operate
,
but
may
be
up
to
12
%
out
-
of
-
tolerance
.
Replace
trip
unit
at
first
opportunity
.
Breaker
tripped
because
phase
current
exceeded
Short
-
Time
Delay
protection
settings
Breaker
tripped
because
ambient
temperature
of
SURE
+
chip
exceeded
95
degrees
C
Trip
Unit
test
will
begin
as
soon
as
you
release
the
push
to
test
button
and
“
TEST
'
message
will
disappear
.
The
breaker
will
trip
,
and
the
cause
of
trip
is
displayed
.
Trip
Unit
test
will
begin
as
soon
as
you
release
push
to
test
button
,
and
the
display
shows
the
elapsed
time
of
test
.
3.2
.
33
ORID
1.1
4
ORNG
Over
RaNGe
Trip
.
:
(
Current
too
high
to
measure
.
)
1.2
2
PLUG
Rating
PLUG
Problem
1
3
ROM
ERROR
..
.
Nonfatal
memory
error
1.2
2
1
SDT
Short
-
Time
Delay
Trip
4
3
4
.
3
5
TEMP
OverTEMPerature
Trip
11
TEST
TEST
and
trip
breaker
is
ready
to
begin
4
0
[
blank
]
Test
{
without
tripping
breaker
)
is
ready
to
begin
4
0
or
Control
power
is
out
.
Trip
unit
not
“
ON
”
NOTES
i
In
the
case
of
a
high
-
level
fault
condition
where
fast
tripping
is
desirable
,
the
Trip
Unit
will
operate
before
a
complete
RMS
current
value
can
be
calculated
.
For
this
reason
,
the
displayed
value
may
be
less
than
the
actual
RMS
fault
current
.
^
In
the
case
of
a
very
high
fault
current
(
greater
than
28
x
ln
)
.
the
message
“
ORNG
'
’
(
indicating
over
range
)
appears
because
the
Trip
Unit
cannot
determine
the
actual
value
of
the
fault
current
J
OverRIDe
(
Fixed
Instantaneous
)
Trip
is
for
type
LS
and
LSG
Trip
Units
(
no
Instantaneous
element
)
,
on
circuit
breakers
whose
Short
-
Circuit
current
interrupting
capability
exceeds
their
Short
-
Time
Current
withstand
capability
.
(
See
Section
1.1
.
4
)
*
The
values
of
the
currents
displayed
after
a
TRIP
event
,
are
the
values
at
the
time
the
TRIP
operation
was
initiated
.
Although
the
magnitude
of
a
fault
current
,
for
example
,
can
continue
to
increase
after
the
TRIP
operation
is
initiated
,
those
values
of
current
occurring
after
the
TRIP
operation
is
initiated
,
are
not
displayed
.
plug
is
to
set
the
value
of
ln
,
the
basis
for
the
Trip
Unit
protection
function
current
settings
.
(
See
Section
3
for
details
.
)
Each
circuit
breaker
frame
rating
represents
the
maximum
current
it
can
carry
continuously
.
However
for
proper
coordination
of
over
-
current
protection
,
it
is
often
desirable
to
choose
different
levels
of
ln
for
different
cir
-
cuit
breakers
of
the
same
frame
rating
.
An
assortment
of
rating
plugs
with
different
ln
values
is
available
for
each
breaker
frame
rating
(
See
circuit
breaker
instruction
leaf
-
let
supplements
listed
in
Section
5
)
to
give
the
user
flexi
-
bility
to
change
the
value
of
ln
without
having
to
change
the
primary
current
sensors
on
the
breaker
.
By
changing
the
rating
plug
,
the
user
can
easily
change
the
range
of
current
protection
settings
without
having
to
remove
the
circuit
breaker
from
its
enclosure
.
CAUTION
BEFORE
YOU
FIT
THE
RATING
PLUG
INTO
THE
TRIP
UNIT
,
BE
SURE
TO
CHECK
THAT
THE
BREAKER
TYPE
AND
FRAME
RATING
(
OR
SENSOR
RATING
IF
APPLICABLE
)
,
MATCH
THOSE
PRINTED
ON
THE
RATING
PLUG
COVER
.
INSTALLING
A
RATING
PLUG
THAT
DOES
NOT
MATCH
THE
BREAKER
TYPE
AND
FRAME
RATING
(
OR
SENSOR
RATING
,
IF
APPLICA
-
BLE
)
,
CAN
PRODUCE
SERIOUS
MISCOORDINATION
AND
/
OR
FAILURE
OF
THE
PROTECTION
SYSTEM
After
installing
the
Rating
Plug
,
press
and
release
the
“
TRIP
RESET
”
push
-
button
.
The
purpose
of
the
rating
F
;
1
>
IV
Effective
5
/
97
Courtesy of NationalSwitchgear.com

I
.
L
.
29
-
886
A
Page
10
Fig
.
4
Rating
Plug
For
example
,
if
one
expects
a
circuit
to
carry
600
A
ini
-
tially
,
but
then
increase
to
1400
A
in
the
future
,
one
could
initially
install
1600
A
cables
and
a
1600
A
breaker
frame
with
the
Trip
Unit
rating
plug
whose
ln
=
800
A
.
Then
later
on
when
the
additional
load
is
ready
to
come
on
line
,
the
rating
plug
could
be
exchanged
for
one
with
ln
=
1600
A
,
without
having
to
remove
the
breaker
from
its
enclosure
.
The
available
settings
would
give
the
following
choices
:
Long
Delay
Setting
/
r
=
ln
x
:
.
5
.
6
.
7
.
8
.
85
.
9
.
95
1.0
Plug
/
„
=
800
A
LDPU
/
r
=
:
400
480
560
640 680
720
760
800
A
Plug
/
„
=
1600
A
LDPU
lr
=
:
800
960
1120
1280
1360
1440
1520
1600
A
Note
:
Rating
plugs
from
Digitrip
models
500
/
600
/
700
/
800
CANNOT
be
used
with
model
610
Trip
Units
.
The
connection
pins
are
located
in
different
posi
-
tions
,
so
one
cannot
accidentally
use
the
incorrect
type
of
plug
.
Rating
Plugs
for
the
Digitrip
RMS
610
Trip
Units
are
marked
for
,
and
may
be
applied
on
both
50
and
60
Hz
systems
.
Rating
plugs
have
two
current
ratings
listed
on
their
cov
-
ers
(
See
Fig
.
4
)
.
and
•
“
/
„
(
Rated
l
)
=
”
current
value
.
This
latter
value
(
ln
)
is
the
basis
for
the
Trip
Unit
current
settings
:
•
The
Instantaneous
and
Ground
Current
Settings
(
if
applicable
)
are
multiples
of
(
ln
)
(
See
Sections
3.6
and
3.8
.
)
•
The
Long
Delay
Current
Setting
,
lr
,
is
a
multiple
of
(
ln
)
.
Long
Delay
Current
Setting
=
/
r
=
LD
x
(
ln
)
.
(
See
Section
3.2
.
)
•
The
Short
Delay
Current
Setting
(
if
provided
)
is
a
multi
-
ple
of
/
r
,
which
in
turn
is
a
multiple
of
(
ln
)
.
Short
Delay
Current
Setting
=
SDx
/
r
=
SDxLDx
(
ln
)
(
See
Section
3.4
.
)
If
the
rating
plug
is
missing
or
not
well
connected
,
then
the
display
will
show
“
PLUG
”
and
the
instantaneous
/
override
LED
will
be
lighted
.
If
the
circuit
breaker
is
closed
,
it
will
trip
;
if
it
is
open
,
it
will
remain
trip
-
free
,
as
long
as
120
VAC
control
power
is
available
to
the
Power
/
Relay
Module
.
Even
if
control
power
is
lost
,
and
the
rating
plug
condition
is
not
corrected
,
as
soon
as
the
three
-
phase
current
through
the
circuit
breaker
reaches
20
%
(
40
%
if
single
-
phase
current
)
of
the
frame
/
current
sen
-
sor
rating
,
the
Trip
Unit
will
trip
the
breaker
again
.
As
indicated
in
Figs
.
2
and
4
,
a
back
-
up
battery
is
pro
-
vided
to
maintain
the
mode
of
trip
LED
indication
in
the
Digitrip
RMS
610
Trip
Unit
when
external
control
power
to
•
the
“
Must
Use
With
Frame
Rated
”
current
value
(
or
“
Sensor
Rated
”
,
if
applicable
)
,
F
^
T
'
N
Effective
5
/
97
Courtesy of NationalSwitchgear.com