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Medium-voltage motor control systems

SC9000 EP medium-voltage variable frequency drive

Eaton’s SC9000 Encapsulated Powerpole (EP) variable frequency drive (VFD), available up to 12000 hp, is an award-winning medium-voltage drive combining innovation and dependability to deliver power, control and energy efficiency in a compact footprint. The SC9000 EP medium-voltage VFD is designed for reliability even in harsh industrial environments including oil and gas, utility, mining, and water and wastewater.

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Voltage Class
5 kV
Horsepower
up to 12000 hp
Main Bus Rating
up to 3000 A

Core features

  • Certified to UL 347A
  • Additional input and output voltages available up to 15 kV
  • Utilizes an inverter topology with a three-level neutral point clamp (NPC) for a low part count and high reliability
  • 24-pulse isolation transformer for IEEE 519 standard compliance
  • Fully-integrated design includes an isolation switch, power fuses and a main contactor eliminating the need for a remote feeder — reducing capital investment.
  • Compact footprint that allows for use in small spaces
  • Roll-in/roll-out stab design inverter for convenience and time savings during inspections and maintenance
  • Full factory testing and burn-in utilizing medium-voltage motors — as opposed to load banks — in Eaton’s world-class motor room
  • Combines with Eaton’s Ampgard main breaker and motor starters across a common bus into a compact and economical integrated assembly

View design guide (layouts, technical data and application information)

Download guide spec (26 18 39 02)

Learn more about power system design basics

Image gallery

View images of SC9000 EP medium-voltage variable frequency drive

SC9000 EP Frame D 24 pulse transformer and rectifier compartment
Main (lower) and variable frequency (upper) buses
400A bypass and motor select starters in double bus structure
SC9000 EP Frame D 24 output filter for synchronous transfer
800A bypass and motor select starters with double bus
SC9000 EP roll in/ roll out inverter
Main breaker, drive, soft starter and full voltage starters in a single lineup
Integrated drive disconnect with switch, fuses and contactor
SC9000 EP inverter with heat pipe cooling technology
SC9000 GP general purpose drive (1000 hp)
SC9000 drive with synchronous transfer close coupled to double bus Ampgard
SC9000 EP Frame D (4500 hp)
SC9000 EP Frame B (2000 hp)

EP means reliable, durable and easy to maintain

The encapsulated powerpole of the SC9000 EP variable frequency drive yields a high MTTF, even in severe environments such as wastewater, mining and oil & gas. Its patented environmental protection and three-level neutral point clamped (NPC) topology improves reliability and diminishes the need for repairs.

Inrush current, meet your match

SC9000 family of medium-voltage VFDs utilize Eaton's soft-mag pre-charge system which:

  • Eliminates drive inrush current
  • Simplifies protection and coordination
  • Provides a possible reduction of incident energy and PPE level at the drive
Learn how the pre-charge system works

Available in arc-resistant, watch this video to see how enclosure technologies provide strength and enhanced safety for the SC9000 EP medium-voltage drive in the event of an arc flash.

Learn more about arc-resistant MV drives

Synchronous transfer to maximize efficiency

When the SC9000 EP variable frequency drive is outfitted with a Synchronous Transfer System it is able to perform a closed transition, maximizing capital efficiency by operating multiple motors of varying hp with one single drive. The incorporation of Ampgard motor control with the double bus design ensures superior performance.
Learn more

Top 5 ways medium-voltage drives can reduce operational costs

Energy efficiency is a powerful incentive to incorporate variable frequency drives but there is another major benefit to applying drives in medium-voltage applications: do more with less equipment. Learn 5 ways synchronous transfer VFDs reduce equipment costs and improve system reliability.

Learn more
Test Drive

Burned in and tested to ensure top quality

Each SC9000 EP medium-voltage VFD receives a burn in test with full voltage and current for a duration of up to 24 hours while connected to a fully rated medium-voltage motor.

Learn more

Integrated control gear streamlines multi-configuration lineups

Combine Eaton’s Ampgard motor starters with SC9000 medium-voltage drives across a common bus into a compact and economical integrated assembly.

Related products

Specifications

View design guide (layouts, technical data and application information)

Download guide spec (26 18 39 02)

Learn more about power system design basics

RATINGS

POWER RATING                         300-6000 hp, 6500-12000 hp
INPUT VOLTAGE RATING 2400-13800 V
OUTPUT VOLTAGE RATING

0-2400 V

0-3300 V

0-4160 V

Contact Eaton if higher output voltage is required 
BASIC IMPULSE LEVEL (BIL)
 60 kV BIL
INTERRUPTING RATING 50 kA rms symmetrical
AMBIENT TEMPERATURE (WITHOUT DERATING)
 0 to 40 °C
STANDARD OVERLOAD RATING (VARIABLE TORQUE)
 110% for 1 minute out of 10 minutes
OPTIONAL OVERLOAD RATING (CONSTANT TORQUE)
 150% for 1 minute out of 10 minutes
OUTPUT FREQUENCY
 1-120 Hz

Standards

UL                                                                                        347A
NEMA ICS6/ICS7
CSA C22.2
THIRD PARTY RECOGNITION/APPROVAL UL/cUL available for most configurations
SEISMIC QUALIFICATION IBC

Enclosure

ENCLOSURE TYPE                                                                                         
 Indoor with gaskets and filters                                 
ACCESSIBILITY
 Front                                                                  
INDOOR SECTION DIMENSIONS (TYPICAL)

65" w x 50" d x 92" h to 218" w x 50" d x 92" h

Consult factory for applications above 6,000 hp
BUS INSULATION Heat shrink sleeve
BUS SUPPORTS Glass polyester
COOLING Air cooled with heat pipes

DEVICES

SWITCHING DEVICE                                           
 Medium-voltage IGBT        
DEVICE MOUNTING
 Draw-out inverter
ISOLATION TRANSFORMER 24-pulse
INPUT POWER CIRCUIT PROTECTION Vacuum contactor with current limiting fuses

APPLICATION DATA

HEAT LOSS

23 W/hp (typical)

Consult factory for applications above 6,000 hp
Download Links
  • SC9000 EP seismic certificate
    Seismic certificate for SC 9000E Medium Voltage Drives, Frames A, B and C 300 to 1750 hp up to 2400 Vac (output)and 300 to 3000 hp up to 4160 Vac (output)
    (PDF 112 KB , 12/01/2013)
  • SC9000 EP Variable Frequency Drive, medium-voltage design guide
    This design guide provides dimensions, layout examples, technical specifications and application information for medium-voltage SC9000 EP Variable Frequency Drives. The information in this document supersedes section 10 of the Consulting Application Guide (CAG).
    (PDF 2 MB , 09/28/2021)
  • SC9000 Inverter Replacement Sales Aid
    This document reviews the upgrade and replacement solutions available for SC9000 medium voltage drives manufactured from 2007 to2013.
    (PDF 304 KB , 05/30/2023)
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