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

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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