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Appendix D: Optional equipment
SC9000 EP application programming
Do not attempt to perform an SC9000 EP motor
characteristics identification procedure with the sine filter
connected between the SC9000 EP and the motor. this could
damage to the SC9000 EP and require repair.
Do not use the Open Loop Vector Control mode with a sine
filter installed. The Sine Filter will interfere with the SC9000
EP motor model calculations, resulting in improper operation.
Applying a sine filter to the SC9000 EP requires programming
the medium voltage drives application. The sine filter
introduces a voltage drop in the output to the motor. The
SC9000 EP application programming raises the drive output
voltage to restore full voltage performance at the motor.
Refer to Chapter 5, Parameter Group G1.14 for detailed
information about the Sine Filter parameters.
The sine filter affects the choice of SC9000 EP operating
modes. Refer to the Caution messages above for important
restrictions.
Troubleshooting
The sine filter includes reactor thermal and capacitor
pressure switches. When a sine filter is included in the
SC9000 EP, these sensors connect to the SC9000 EP I/O
and the drive application is programmed to monitor them.
Detection of a thermal switch or capacitor pressure switch
opening causes a drive shutdown and a fault message to be
displayed and recorded.
Replacement parts
Table 18 shows replacement part.
Table 18. Replacement parts
Part number
Description
W2E250-HJ32-0
Fan, WE250, 1P, 115V, 60HZ, 50C C
478C779H01
Intake filter
Contact Eaton for
Capacitor assembly (overtemperature,
project-specific part
overpressure switches included)
O&M technical references
For additional information about the SC9000 EP, refer to this
SC9000 EP User Manual, IB02004001E.
70
SC9000 EP medium voltage drives IB020001EN—February 2016 www.eaton.com
CAUTION
CAUTION
Section 4: Synchronous transfer
Purpose
With additional equipment, the SC9000 EP can provide
synchronous transfer control to a multi-motor system. (This
excludes SC9000 GP, which is not capable of synchronous
transfer). For any number of motors, this system individually
starts and accelerates each motor and runs it at any desired
speed. Or, it can start a motor, match the motor's voltage,
frequency and phase angle to a utility power bus, and
transfer the motor from the SC9000 EP to the utility bus.
The Synchronous Transfer system can also transfer any
connected motor's power from the utility bus back to the
SC9000 EP and individually control its speed or stop it.
Components
To perform this function, the Synchronous Transfer System
must have an SC9000 EP output damping reactor, a PLC
control system to receive customer commands, and bypass
and motor select contactors for each motor. Customer
commands include Start or Stop, Sync Up or Sync Down,
for each system motor. The SC9000 EP can also include an
optional AFD feeder bus contactor.
SC9000 EP output reactor
Sized for the SC9000 EP drive and motors' rating, the output
reactor dampens current transients during the bypass
contactor and motor select contactor switching.
Bypass contactor
This Ampgard medium voltage starter assembly connects
a selected motor to the utility feed line upon command.
There is one bypass contactor module for each connected
motor.
Motor select contactor
This Ampgard medium voltage starter assembly connects
a selected motor to the AFD feeder bus upon command.
There is one motor select contactor module for each
connected motor. Unlike the bypass contactor module,
this module does not include motor starter fuses, since the
SC9000 EP provides overload protection.
PLC system
The SC9000 EP Synchronous Transfer system includes
programmable controllers to receive command inputs
from the customer's supervisory control and sequence
the SC9000 EP, the motor select and bypass contactors.
A Drive master PLC mounts behind a low voltage door in
an SC9000 EP cabinet. Smaller PLCs for each motor in the
system provide system scalability plus status monitoring
for each system motor.
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