2-5 Auxiliary Ct Harness; 12.3 Auxiliary Ct Module Wiring - Eaton Cutler-Hammer Digitrip RMS 510 Instructions Manual

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Page 63
SECTION
12
DETAILED WIRING OF
HARNESSES
AND RELATED
COMPONENTS
12.1 Sensor Harness Wiring
To
cover both 3 and 4 wire system applications,
the Sensor Harness includes
two
wires
to permit
the 4th wire connection. These
two wires (one tan
and one green) are readily identifiable; they are the
longest
two
wires
that protrude from the Sensor
end of the harness. Determine the applicable
wiring diagram (Figure
12-1
, 12-2, 12-3 and 12-4)
for your application, and pedorm the following.
1
.
lf the retrofit is for a 3-wire system (Figure
1
2-1
or 12-2), the wires provided for the 4th wire
connection
are
not needed. Remove the
terminals from the long ends of the green and
tan wires, then use an Ohm meter to confirm
the other ends and remove them by sliding
them out of the harness.
2.
lf the retrofit is for a 4-wire system (Figure 12-3
or 12-4,) the green and tan wires provided for
the fourth connection are required for
connection to an open set of Breaker
Secondary Contacts.
3.
ln describing the Sensor Polarity, the
"Common"
is
the Green Wire, and the "Dot"
is
the Polarity Mark, usually located near the
X1
terminal on the
Sensor.
Table
12-'l
Power Flow Conventions
Table 12-1
should be consulted to determine
the proper arrangement to allow the Trip Unit to
read power properly. ln all cases shown, the
Current Sensors are mounted with the Sensor
Nameplates facing out so that they can be read
with the Sensor installed on the Breaker.
NOTE:
For
4-wire grounded systems, the Breaker
and Cell Secondary Contacts are not
included
in
the kit. These items must be
ordered separately from the Original
Equipment Manufacturer. The 4th Sensor
for the Switchgear neutral is included when
ordered with
the Retrofit kit. The 4th
Sensor is mounted on the neutral bus
bar.
It is the responsibility of the Retrofitter
to
locate an appropriate place to mount the
4th Sensor and to insure proper Breaker
operation.
12.2 Auxiliary CT Harness Wiring
Figure 12-5 shows the detailed wiring connections
for the Auxiliary CT Harness.
12.3 Auxiliary CT Module Wiring
Figure 12-6 shows the detailed wiring for the
Auxiliary CT Module.
Power Flow
Sensor
Mounting Sensor
Polarity
Top
to Bottom Top
Common (Green Wire) AWAY FROM Dot
(Xl)
Top
to Bottom Bottom Common
(Green Wire) ON Dot (X1)
Bottom to Top
Top Common
(Green Wire) ON Dot
(Xl)
Bottom to Top
Bottom Common
(Green Wire) AWAY
FROM Dot
(Xl)
Effective 9/01
E:T.il