Eaton Cutler-Hammer Digitrip RMS 510 - Power Flow Convention; Power Flow Conventions

Page
29
13. Communications
when applied
with the
Cutler-Hammer
PowerNet
SYstem;
14. Energy
Monitoring
Capability;
15. Power Quality
(Digitrip
91
0 only); and
16. System
Voltage
(Digitrip
910 Only).
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.
7.3
Power
Flow Convention
For
RMS 810 &
910 Kits,
proper
Power Flow
Conventions
must be
maintained
as follows
to
assure
the
Trip Unit reads
positive
power.
The
factors
which affect
this are
the Direction
of Power
Flow
the Location
of the
Sensors
(lop
or Bottom),
and the
Polarity of
the Sensor
Connections.
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.
Figure
7-2 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.
Power Flow
Sensor
Mounting
Sensor
Polarity
Top
to Bottom
Top
Common
(Green
Wre)AWAY
FROM
Dot
(X1)
Top
to Bottom
Bottom
Common
(Green
Wire) ON
Dot
(Xl)
Bottom to
Top
Top
Common
(Green
Wire)
ON Dot
(X1)
Bottom
to
Top
Bottom
Common
(Green
Wire)AWAY
FROIM Dot
(X1)
Fig. 7-2
Power Flow Conventions
Fftective 9/01
ElT.il