SC9000 EP medium voltage drives
SC9000 EP medium voltage drives IB020001EN—February 2016 www.eaton.com xi
Glossary
Many of the following terms and acronyms are
used throughout the manual and on schematics.
They are included to clarify verbiage.
Terms and abbreviations
24PR—24 pulse diode rectifier bridge
27/47—Undervoltage and phase reversal detection relay
Active Front End (AFE)—Refers to controllable rectification
of AC to DC; makes a drive regenerative
Adjustable frequency drive—A type of motor controller that
drives an electric motor by varying the frequency and voltage
supplied to the electric motor
Bypass—Systems provide backup for the
SC9000 EP adjustable frequency drive
Cn—DC bus capacitors (C1, C2, C3…)
COE—Custom order engineering
Constant torque (ct)—A drive whose torque rating is
constant over its operational range
CPT—Control power transformer
CRn—DC bus rectifier from pre-charge transformer
CTB—Customer terminal block
CT—Current transformer
DMCR—Drive motor control rack
EP—Encapsulated powerpole
EPC—Electric pre-charge
Fieldbus—An industrial network system for real-time
distributed control
ICG—Ampgard integrated control gear
Fn—24 pulse rectifier fuse (F1, F2, F3…)
IGBT—Insulated gate bipolar transistor
Inverter (INV)—An electronic device or circuitry that change
direct current (DC) to alternating current (AC)
ISW—Isolation switch
ISWX—Isolation switch auxiliary relay
ITG—Integrated interface card
M—Main contactor
MBn—Main blower (MB1, MB2, MB3…)
MCO—Main cooling on
MCR—Main contactor relay
MCX—Main cooling contact
MFn—Main fan (MF1, MF2, MF3…)
MFX—Main cooling interposing relay
Motor ID Run—The better way to identify a motor, requires
motor shaft be disconnected from the load
MOV—Metal oxide varistor
MSn—Main blower starter (1, 2, 3…)
OCS—Output contactor status
OCX—Output contactor contact
OPTXX—SPX controller option card
PCR—Pre-charge ready relay
PFn—Primary fuse (PF1, PF2, PF3…)
PMR—Phase monitor relay
PS—ITG power supply
PT—Potential transformer
PX—Pre-charge relay
RCO—Redundant cooling on
RCX—Redundant cooling contact
Rectifier—An electrical device that converts an alternating
current into a direct one by allowing current to flow through it
in one direction only.
Rn—Resistor (RS1, RS2, RS3…)
RSn—Redundant blower starter (RS1, RS2, RS3…)
RTD—Resistive thermal device
RVSS—Reduced-voltage soft starter
SPX—Drive controller module
T2—Blower transformer
UPB—UPS replace battery
UPR—UPS ready
UPS—Uninterrupted power source
Variable torque (vt)—A drive whose torque rating varies
over its operational range
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