Eaton Cutler-Hammer Digitrip RMS 510 - 2-5 Auxiliary CT Harness; 12.3 Auxiliary CT Module Wiring

AD 33-855-4
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