Eaton Cutler-Hammer Digitrip RMS 510 - Digitrip RMS 61 O; Digitrip RMS 610 Retrofit Kit; Kits

AD 33-855-4
Page
25
SECTION
6
DIGITRIP
RMS 610
RETROFIT
KITS
6.1
Digitrip
RMS 610
Retrofit
Kit Selection
and Gontent
The Digitrip
RMS 610
Retrofit
Kit series
provides
Overcurrent
protection, Zone lnterlock
capability,
and a
local Alphanumeric
Display.
The Retrofit
Kits
are available
with
the applicable
Digitrip
RMS 610
Trip
Unit Overcurrent
Trip
Functions,
(i.e.:
Long
Time
(L),
Shod
Time
(S),
lnstantaneous
(l),
&
Ground
Fault Time
(G)
Delays).
The combinations
available
are
Ll, LS, LSl,
LlG,
LSG,
LSIG.
ln addition
to Zone
lnterlocks,
the
RMS 610
Trip
Units
include the
Power
Relay
Module
(ATR)
which
provides
contact
closures
for remote
indication
and
alarm.
Zone lnterlocking
and
remote
alarm
signals
are extracted
from
the Trip Unit
by
the
External
Harness.
The External
Harness
includes
a
20-pin
plug,
which
connects
to the Cell
Harness
Assembly.
A
120 VAC
control
power
source
is required
to
power
up
the
Power
Relay Module
(ATR)
remote
signals,
the
local
mode of
trip
indicators, and
the
trip Unit
Alphanumeric
Digital
Display.
Figures
6-1
,
12-9,
and
12-13
provide the Retrofit
Kit
wiring
connections
on
the Breaker
and
in the
Switchgear
Cell.
All Retrofit
Kit components
are
mounted
on
the
Breake[
except
the
Cell
Harness Assembly'
which
is
mounted
in
the Switchgear
Cell.
The
120
VAC control
power
can
be supplied
externally
via
wiring in
the Cell
or it can
be sup-
plied
via the
Breaker
Mounted
Control
Power
Tiansformer
(CPT) (optional
with
the
Retrofit
Kit).
6.2
Digitrip
RMS 610
Retrofit
Kit Features
The Digitrip
RMS
610
Trip Unit
has
the following
features
available
for customer
use,
when
applied
in
the Digitrip
RMS
610
Retrofit
Kit:
1 . Basic
(L,S,l,G)
Overcurrent
Protection,
as
selected;
2. Trve
RMS
Sensing;
3.
lntegral
Trip
Unit Testing;
4. Unit Status
lndicator;
5.
Local
Mode
of TriP
lndicators;
6. Selectable
l2t
on Short
Time
and Ground
Fault
Time
Delays
when
those
options
are selected;
7 .
Local
Four Digit
Alphanumeric
Display;
8.* Zone
lnterlock
capabilities
of
the Breaker
Short
Time and
Ground
Fault Delay
Functions,
when those
options
are
selected;
9.-
Remote
Relay
Contacts
for high
load and
mode
of
trip indication;
and
10.
For
powered
61 0, 810,
& 91
0 Trip
Units:
Once
an
overcurrent
has occurred,
the Trip
Unit
sends an
electrical
signal
to the Direct
Trip
Actuator
(DTA)
which
will be
monitored
until
the Trip
Unit
is reset,
keeping
the
Breaker
in a
trip
free condition.
The
Trip
Unit also
includes
provisions to accept
the
required
Rating
Plug. The
Rating
Plug
is equipped
with a battery
to light
the local
mode
of trip
indica-
tors if
the 120
VAC control
power
is lost.
"
The
Zone
lnterlock
and ATR
relay contacts
are
available
on
610
Kits with
normal
External
Harness.
A
popular
option
is to
specify
the
Breaker
l\y'ounted
CPT
with a simplified
External
Fiarness
in which case
no Cell Harness
is used.
This option
omits
the
Zone
lnterlock and
remote
relay connections,
but
does
maintain
the Alphanumeric
Display and
trouble
shooting
capability
of the
Digitrip
RMS 610
Kit.
Fffective
g/01
ElT.il