GE Industrial Solutions Spectra RMS Molded Case - Manual (Page 23)

22
GEH-702 Users Manual
Power Direction (Optional)
This set point establishes the normal direction of current
flow in the breaker. There are two available choices. A
DOWN Arrow represents current flowing from Line to
Load. An UP Arrow represents current flowing from
Load to Line (reverse fed).
Phase Rotation (Standard)
The Phase Rotation setup feature is used for Spectra
microEntelliGuard
TM breakers that are mounted back-
to-back in group-mounted equipment applications.
This feature identifies the orientation of the breaker
pole connections to the equipment bus. There are
two available setup choices; ABC represents the left
pole of the breaker being connected to bus Phase
A. CBA represents the right pole of the breaker being
connected to bus Phase A.
Trip units with Phase Rotation set to CBA (right pole of
breaker connected to bus Phase A) that are optioned
with advanced metering and also utilize voltage input
signals require a voltage exchange cable in order to
transpose the voltage signal. Figure XX illustrates a
typical group-mounted equipment installation with a
voltage exchange cable.
Figure 16. System With Voltage Exchange Cable
Thermal Memory (Standard)
The available Thermal Memory settings are YES and NO.
Selecting YES enables the thermal memory software to
digitally store the breaker’s heating/ thermal
characteristics as a function of current and time. With
thermal memory enabled, in the event of a trip and a
subsequent contact re-closure, the trip unit will recall
the breaker’s heating/thermal characteristics and use
this information in future overcurrent calculations. This
feature requires 24Vdc control power. Selecting NO
disables this function.
Auxiliary Switch (Standard)
The available Auxiliary Switch Installed settings are YES
and NO. Selecting YES enables the trip unit to monitor
and display the state of the circuit breaker main
contacts (in the STATUS mode). Spectra
microEntelliGuard
TM breakers with communications are
capable of communicating the breaker position when
an auxiliary switch is installed and connected via a
terminal board or junction box. Selecting NO disables
this function.
Modbus (Optional)
The Modbus communications set points set the
communication baud rate and the Modbus address for
the breaker. The baud rate can be set to any standard
baud rate from 300 to 19,200 with even, odd or no
parity. The default value is 19,200 with eight-bit word
length, no parity and one stop bit . The default Modbus
address is one.
Date and Time (Standard)
This set point establishes a date and time in the breaker
that can be used to time stamp events in the event log.
The time and date field are also available over Modbus.
It should be noted that removing all power from the unit
(no external 24VDC source and less than 20% current
flow through the breaker) will cause the time and date
to be reset to the factory default . The date setting is
year, month and day. The time setting is hour, minutes
and seconds.