Cut Sheet

V10-T17-72 Volume 10—Enclosed Control CA08100012E—November 2012 www.eaton.com
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17.6
Technical Data and Specifications
Reduced Voltage Starters
Monitoring Capabilities
The S811+ has an impressive array of system monitoring capabilities that allows users to access real
time process and diagnostic data. This data can be viewed at the device with the DIM or through a
communications network. Data over a communications network can provide valuable insight into the
condition of the equipment and processes. Maintenance and production personnel can monitor critical
operational and maintenance data from a central control station that can be located far away from the
production facility. Process data can be monitored to determine system anomalies that may indicate a
need for preventive maintenance or an impeding failure. Adjustments made through the communications
network can reduce costs by minimizing the time traveling to the location where the motor controls are
located. When faults do occur, real time fault data can assist maintenance in trouble-shooting and
planning repair resources. Remote reset signals can be given to tripped devices without the need for
manual intervention by maintenance personnel.
Average Line Current
Provides the average of
the three-phase rms line
currents in amps, accurate to
within 2%. Current data can
be used to indicate a need for
maintenance. Increased
currents in a fixed load
application can indicate a
reduction in system
efficiencies and performance,
signifying system
maintenance is due.
Average Pole Current
Provides the average of
the three-phase rms pole
currents in amps, accurate to
within 2%. The pole current
is the current through the soft
starter. The line and pole
current will be identical in
inline applications, and will
differ in inside-the-delta
applications.
Average Line Current
as a % FLA
Provides the average rms line
current as a percentage of
the S811+ FLA setting.
Three-Phase Line Currents
Provides three rms phase line
currents in amps, accurate to
within 2%. Imbalances or
changes in the relative phase
current to one another can
indicate anomalies in the
motor or electrical distribution
system.
Three-Phase Pole Currents
Provides three rms phase
pole currents in amps,
accurate to within 2%. The
pole current is the current
through the soft starter.
The line and pole current
will be identical in in-line
applications, and will differ in
inside-the-delta applications.
Three-Phase Line Voltages
Provides the individual rms
three-phase line voltages.
Imbalances or changes in
|the relative phase voltage
to one another can indicate
anomalies in the motor or
electrical distribution system.
Voltage can be used to
monitor electrical distribution
system performance.
Warnings, alarms and
system actions to low or
high voltage conditions can
be implemented.
Percent Thermal Memory
Provides the real time
calculated thermal memory
value. The S811+ calculates
thermal memory value. A 100%
value represents the maximum
safe internal temperature of
the motor. When the thermal
memory value reaches
100%, an overload trip will
occur, removing power to the
motor.
The thermal memory value
can be of great use in
determining an impending
overload trip condition. When
using a communications
network, alarms can be
implemented in the process
monitoring system warning
of an impending trip before
the trip occurs, halting the
process. Costly system
downtime can be avoided.
DC Control Voltage
Monitors level of the 24 Vdc
control voltage. Fluctuations
in control voltage can cause
component malfunction and
failure. System control
voltage data can be used to
implement warnings, alarms
and system actions to low or
high voltage conditions.
Pole Temperature
Increases in power pole
temperature are caused by
increases in ambient
temperature, start/stop times
and start duty cycles.
Changes in pole
temperatures represent a
change in system operating
conditions. Identifying
unexpected operating
conditions or changes can
prompt maintenance and
aid in process evaluation
activities.
PCB Device Temperature
An increase in printed circuit
board (PCB) device
temperature is a strong
indication of an increase in
ambient temperature. High
ambient temperature
operation can be identified
with the device temperature
data. Device temperature
increases can be due to
undersized enclosures, failure
of cooling fans or blocked
venting. High operating
temperatures will reduce the
life of all electrical equipment
in the enclosure.
Start Count
Start count data can be used
to monitor system output,
schedule preventative
maintenance, identify system
anomalies and identify
changes in system operation.
Average Line Power
Provides the average of the
three-phase line power in
kilowatts, accurate to 5%.
Power data may be used
to monitor power transmitted
to the load. Increased power
demand may indicate degraded
system components or
connections. Additionally,
such data is useful in
determine power utilization
in branch circuits consisting
of multiple loads.
Power Factor
Provides the three-phase
power factor value, accurate
to 5%. The power factor of
the circuit may be used to
identify circuit conditions that
may need to be corrected
due to low power factor
indications. Low circuit power
factor can indicate improper
or degraded components.