Medium Voltage Custom AC Drives - VersaBridge®

TECO-Westinghouse is pleased to now offer a complete package of Variable Speed Drive (VSD) systems that includes an Input/ Output Switchgear, Medium Voltage Drive (MVD), and motors. VersaBridge® MVDs provide reliable motor control for a variety of industry specific and general purpose applications including Oil & Gas, Utility/ Power Generation, Metals and Mines. These patented MVDs are designed utilizing a multilevel H-Bridge topology that reduces the harmonic levels to extremely low levels. The modular design facilitates ease of installation, commissioning and maintenance. The VersaBridge® is an innovative product that combines reliable, simple, and compact solutions with the latest power electronics and cooling technologies.

• Modularity Modular design with common building blocks (Cube, Slices, Mains) makes the VersaBridge® MVD scalable for different power ratings with fewer spare parts. Power Electronics Modules (Cubes) can be easily removed for maintenance.
• Quick and Easy Installation There are configurable power cable entries/exits on the top, bottom, or both. There are no field cabling requirements to connect the assembled Mains and Slice sections.
• Serviceability Modular design requires few spare parts. Additionally, the parts are universal and can be used in any configuration regardless of the voltage or power class.
• Multilevel, Cascaded, H-Bridge Topology This produces near sinusoidal wave output which reduces motor harmonics and torque pulsation, even at low speeds with virtually no cable length restriction.
• Ultra Low Line-Side Harmonics These harmonics are fully compatible with new or existing motor installations without the need for an external filter and exceed IEEE-519 standard requirements.
• Bypass Manual/Automatic The VersaBridge® MVD has isolating contactors within each Cube. In the event of a fault, contactors will isolate the faulty Slice and allow the MVD to restart, catching the spinning motor.
• Flying Start into a Spinning Load The VersaBridge® MVD offers the ability to catch a spinning load without any torque, voltage, or current having a negative impact on the equipment.
• N+1 … N+N Redundancy In addition to the Slice bypass option, the drive can be configured to have additional redundancy options for continued operation at full rated output power.
• Power Dip Ride-Through The VersaBridge® MVD design provides a five cycle power loss ride-through to keep the process running without the need for auxiliary UPS.
• One Drive for Multiple Motors The VersaBridge® MVD can start multiple motors and transfer them synchronously to utility lines and back to the drive.
• Industry Standard Ethernet Modbus Communication Standard protocol allows the VersaBridge® MVDs to easily communicate with various SCADA or DCS systems.

• Chassis Style Enclosure (IP20)
• Sensorless Vector or V/ Hz with Auto Torque Boost Feature
• 0.25 to 1 HP, 115V, 50/ 60Hz, 1-Phase
• 0.25 to 3 HP, 230V, 50/ 60Hz, 1-Phase
• 0.5 to 3 HP, 230V, 50/ 60Hz, 3-Phase
• 1 to 3 HP, 460V, 50/ 60Hz, 3-Phase
• Extensive Diagnostic and Monitoring Capabilities
• Din Rail Option
• PID Control
• 8 Preset speeds
• Two Multi-Function Analog Input/ Qty 1 Analog Output
• Built-in Modbus or BACnet Protocol Via RJ 45 Interface
• UL, cUL, and CE Approved

• Control Modes for V/F, Sensorless Vector, Sensorless Vector with Permanent Magnet Motor
• Built-in PLC as Standard
• Operation and Engineering Units Standard
• LCD Keypad with Remote Mounting Capabilities
• PID Control with Advanced Diagnostics and Sleep Mode
• 1 to 150 HP (Variable Torque), 230V, 50/ 60Hz, 3-Phase
• 1 to 800 HP (Variable Torque), 460V, 50/ 60Hz, 3-Phase
• Plenum Rated
• Diagnostics Registers for Troubleshooting
• Flexible Input/ Output Configurations that Incorporate Normally Open or Normally Closed Signals
• 0 to 400 Hz Speed Range
• Built-in Modbus, BACnet, and Metasys (N2) Protocols via (RS485 or RJ45 Interface)
• Enhanced Design for Smoother and Quieter Motor Operation
• Real Time Clock ( Standard on Models with LCD Keypad )
• PTC Input Available for Direct Thermal Protection of the Motor
• Thermal Management on the Heat Sink for Overtemperature Fault Avoidance
• Master-Follower Control Mode Built-in
• EMI Protection that Complies with EM61800-3 with Optional Filter
• EMS Protection that Follows EN61800-3
• UL, cUL, and CE Approved

• Designed for Constant / Variable Torque Applications
• V/F, Dynamic Torque, Sensorless and Sensor (Encoder Feedback) Vector mode
• Backlit LCD / English Language with LED Monitor Display / Selections for 6 Languages
• Keypad may be Used as Copy Unit / Remote Mounting Options
• Extensive Diagnostic Information on LCD Display
• State-of-the-Art Torque Limit and Control Features
• PID control with Sleep Mode Function
• Provided with low -noise control power supply
• 1 to 125 HP @ 230V & 1 to 900 HP @ 460V (Constant Torque)
• 1 to 150 HP @ 230V & 1 to 1000 HP @ 460V (Variable Torque)
• Extensive I/O capabilities
• Encoder feedback option for applications requiring precise speed control
• PC Boards have conformal coating and the DC Bus is tin plated
• External Mounting of Heatsink when Installed in Control Panels(>40HP)
• All Units are IP20 at 40hp and below and IP00 at ratings >40HP (Nema 1 Option Kits available)
• Built-in RS485 Communications (Modbus) / Optional Profibus-DP, DeviceNet, EtherNet, BACNet, Metasys
• DC Link Chokes Included in 75HP and Above hp units shipped loose as chassis item inside crate
• uL and CE Approved

• Control Modes for V/F, and Sensorless Vector
• Simple PLC Function Built-in
• .5 to 20 HP (CT), 230V, 50/ 60Hz, 3-Phase
• 1 to 25 HP (CT), 460V, 50/ 60Hz, 3-Phase
• Conformal Coating on PC Boards
• LED Keypad with 5 Digits
• Flexible Input/ Output Configurations that Accept Normally Open or Normally Closed Signals
• 0 to 599 Hz Speed Range
• PID Control
• Diagnostics Registers for Troubleshooting
• Built-in Modbus Protocol via (RJ45 Interface)
• Dedicated Pulse Follower Signal
• UL, cUL, and CE Approved

• 0.5 to 3 HP (CT), 230V, 50/ 60Hz, 1-Phase
• 0.5 to 40 HP (CT), 460V, 50/ 60Hz, 3-Phase
• 1 to 75 HP (CT), 460V, 50/ 60Hz, 3-Phase
• Parameters Grouped by function
• Built-in PLC Functionality
• PID Process Control Loop
• Built-in Modbus & BACnet Protocols
• 5 Digit Operator’s Keypad with Speed Pot
• Digital and Analog Inputs and Outputs have Extremely Fast (~4 msec) Update Time
• Auto Run Mode (Cyclic Operation)
• Power Loss Ride Through
• Automatic Voltage Regulation (AVR)
• Complies with IEC 60018-2-78, UL, cUL, CE, & RoHS

• Control Modes for V/F, V/F with PG feedback, Sensorless Vector, and Closed Loop Vector
• Simple PLC Function Built-in
• Advanced Regenerative Load Handling Capability
• 1 to 100 HP (CT), 230V, 50/ 60Hz, 3-Phase
• 1 to 125 HP(VT), 230V, 50/ 60Hz,3-Phase
• 1 to 400 HP (CT), 460V, 50/ 60Hz,3-Phase
• 1 to 400 HP (VT), 460V, 50/ 60Hz,3-Phase
• 1 to 10 HP (CT/VT), 575V, 50/ 60Hz,3-Phase
• 15 to 250 HP (CT), 690V, 50/ 60Hz,3-Phase
• 15 to 270 HP (VT), 690V, 50/ 60Hz,3-Phase
• Conformal Coating on PC Boards
• LCD Keypad that is Remotely Mountable
• Flexible Input/ Output Configurations that Accept Normally Open or Normally Closed Signals
• 0 to 599 Hz Speed Range
• PID Control
• Diagnostics Registers for Troubleshooting
• Built-in RS485 Modbus Protocol
• Enhanced Design for Quiet Motor Operation
• Pulse Output and Pulse Follower
• Select Between Closed-Loop Speed and Torque Control in Vector Mode
• UL, cUL, and CE approved

• Three Phase, 60 Hz, 1.15 Service Factor (Continuous on Sine Wave Power)
• Inverter Duty (PWM) per NEMA® MG-1 Part 31 at 1.0 Service Factor
• Standard Features: Coupling w/ Gib Key, Ball Type NRR, Drip/Splash Cover, Space Heaters (120V)
• 5000 Frames and Above also include Mounting Provisions for bearing RTD's and Insulated Bearing Housing
• Class F Insulation with VPI Epoxy Resin Varnish
• Class B Temperature Rise
• NEMA Design B Torques
• Oversized Main Conduit Box Rotatable in 90 Degree Increments - Fully Gasketed with NPT Threaded Entrance
• Steel Plate Conduit Box for F#449-5800
• Designed for 40˚C Ambient Temperature
• Designed for 3300 ft. Elevation
• Counterclockwise (CCW) Rotation; Viewed from Top
• Cast Iron Frame & End Brackets
• 1045 Solid Carbon Steel Shaft
• Aluminum Die Cast Squirrel Cage Rotor Construction for F#449TP and Below
• Squirrel Cage Copper or Copper Alloy Bar Rotor Construction for F#5000
• Paint System: Phenolic Rust Proof Base Plus Polyurethane Top Coat
• Paint Color: Blue - Munsell 5PB 3/8
• Guide Bearings: 449VP - 5810VP Frames are Re-Greasable with Mobil Polyrex™ EM Grease
• Thrust Bearings: 449VP - 5810VP Frames are Oil Lubricated Angular Contact or Spherical Thrust Bearing with Site Glass
• Oil Requirements for 444VP - 5810VP Frames: 300 S.S.U. @ 100°F
• Grease Discharge Fittings on Frames with Re-Greasable Motors
• Labyrinth Type Metal Flinger on Lower End Bracket
• Grounding Terminal Inside Main Box
• Stainless Steel Nameplate
• Suitable for Inverter Use per NEMA MG-1.4.4.2, Part 31.
• Speed Ranges: 10:1 VT, 4:1 CT
• 6 Leads
• UL Recognized and CSA Approved
• Precautions should be taken to eliminate or reduce shaft currents that may be imposed on the motor by VFD as stated per NEMA MG-1 Part 31.
• Ball Type NRR Provided

• Three Phase, 60 Hz, 1.15 Service Factor (Continuous on Sine Wave Power)
• Inverter Duty (PWM) per NEMA® MG-1 Part 31 at 1.0 Service Factor
• New Dual Column (60/50 Hz) Design Nameplate as Standard; 50 Hz Data 190/380V at 1.0 S.F.
• Standard Features: Ball Type NRR, Drip/Splash Cover, Space Heaters (120V)
• 5000 Frames and Above also include Mounting Provisions for bearing RTD's and Insulated Bearing Housing
• Class F Insulation with Phenolic Alkyd Resin Varnish
• Class B Temperature Rise
• NEMA Design B Torques
• Oversized Main Conduit Box Rotatable in 90 Degree Increments - Fully Gasketed with NPT Threaded Entrance
• Cast Iron Conduit Box for F#449VP and Below; Steel Plate Conduit Box for F#5000
• Designed for 40˚C Ambient Temperature
• Designed for 3300 ft. Elevation
• Counterclockwise (CCW) Rotation; Viewed from Top
• Cast Iron Frame & End Brackets
• 1045 Solid Carbon Steel Shaft
• Aluminum Die Cast Squirrel Cage Rotor Construction for F#449VP and Below
• Squirrel Cage Copper or Copper Alloy Bar Rotor Construction for F#5000
• Paint System: Phenolic Rust Proof Base Plus Polyurethane Top Coat
• Paint Color for AMRCED (MAX-VSP™): Blue - Munsell 5PB 3/8
• Guide Bearings: 213VP - 286VP frames are Double Shielded
• Guide Bearings: 324VP - 5810 frames are Re-Greasable with Mobil Polyrex™ EM
• Thrust Bearings: 213VP - 286VP frames are Re-Greasable Angular Contact with Mobil Polyrex™ EM
• Thrust Bearings: 324VP - 405VP frames are Oil Lubricated Angular Contact with Site Glass
• Oil Requirements for 324VP-405VP - 145 to 175 S.S.U. @100°F
• Oil Requirements for 444VP-5810VP - 300 S.S.U. @100°F
• Grounding Terminal Inside Main Box
• Stainless Steel Nameplate and Rodent Screens
• 12 Leads (PWS on 230V) on 213 - 405VP; 6 Leads on 444VP to 449VP; 5000 Frames and Above with Connection Studs
• Suitable for Inverter Use per NEMA MG-1.4.4.2, Part 31. 10:1 Variable Torque with NRR. 10:1 C.T., 20:1 VT without NRR Using Braking in VFD
• Precautions should be taken to eliminate or reduce shaft currents that may be imposed on the motor by VFD as stated per NEMA MG-1 Part 31.

• Three Phase, 60 Hz, 1.15 Service Factor (Continuous on Sine Wave Power)
• Inverter Duty (PWM) per NEMA® MG-1 Part 31 at 1.0 Service Factor
• Standard Features: Non-Sparking Ball Type NRR, Drip/Splash Cover, Space Heaters (120V)
• 5000 Frames and Above also include Mounting Provisions for bearing RTD's and Insulated Bearing Housing
• CSA Certified for Class I, Div. 2, Groups B, C, D; Temp Code T3 minimum
• Class F Insulation with VPI Epoxy Resin Varnish
• Class B Temperature Rise
• NEMA Design B Torques
• Fab Steel Plate Oversized Main Conduit Box Rotatable in 90 Degree Increments - Fully Gasketed with NPT Threaded Entrance.
• Steel Plate Conduit Box with Threaded Connection Opening(s)
• Designed for 40˚C Ambient Temperature
• Designed for 3300 ft. Elevation
• Oversized Angular Contact or Spherical Thrust Bearing Installed
• Counterclockwise (CCW) Rotation; Viewed from Top
• Cast Iron Frame & End Brackets; Steel Plate Fan Cover
• 1045 Solid Carbon Steel Shaft
• Aluminum Die Cast Squirrel Cage Rotor Construction for F#449VP and Below
• Squirrel Cage Copper or Copper Alloy Bar Rotor Construction for F#5000 and Above.
• Paint System: Phenolic Rust Proof Base Plus Polyurethane Top Coat
• Paint Color: Blue - Munsell 5PB 3/8
• Guide Bearings: Re-Greasable with Mobil Polyrex™ EM Grease
• Thrust Bearings: Oil Lubricated Angular Contact or Spherical Thrust bearing with Site Glass
• Oil Requirements: 300 S.S.U. @ 100F
• Automatic Grease Discharge Fittings on Frames with Re-Greasable Motors
• Labyrinth Type Metal Flinger on Both Ends for Frames 320VP & Up
• Grounding Terminal Inside Main Box
• Stainless Steel Nameplate
• Suitable for Inverter Use per NEMA MG-1.4.4.2, Part 31.
• Speed Ranges: 10:1 VT, 4:1 CT
• 6 Leads
• UL Recognized and CSA Approved
• Precautions should be taken to eliminate or reduce shaft currents that may be imposed on the motor by VFD as stated per NEMA-MG-1 Part 31.

• 230/460V Motors Suitable for Partial Winding Start (at 230V Only)
• Three Phase, 60 Hz, 1.15 Service Factor (Continuous on Sine Wave Power)
• CSA Certified for Class I, Div. 2, Group B, C, D - Temp Code T3 Minimum
• Inverter Duty (PWM) per NEMA® MG-1 Part 31 at 1.0 Service Factor
• New Dual Column (60/50 Hz) Design Nameplate as Standard; 50 Hz Data 190/380V at 1.0 S.F.
• Standard Features: Non-Sparking Ball Type NRR, Drip/Splash Cover, Space Heaters (120V)
• 5000 Frames and Above also include Mounting Provisions for bearing RTD's and Insulated Bearing Housing
• CSA Certified for Class I, Div. 2, Groups B, C, D; Temp Code T3 minimum
• Class F Insulation with Phenolic Alkyd Resin Varnish
• Class B Temperature Rise
• NEMA Design B Torques
• Oversized Main Conduit Box Rotatable in 90 Degree Increments - Fully Gasketed with NPT Threaded Entrance
• Cast Iron Conduit Box for F#449TP and Below; Steel Plate Conduit Box for F#5000
• Designed for 40˚C Ambient Temperature
• Designed for 3300 ft. Elevation
• Counterclockwise (CCW) Rotation; Viewed from Top
• Cast Iron Frame & End Brackets
• 1045 Solid Carbon Steel Shaft
• Aluminum Die Cast Squirrel Cage Rotor Construction
• Paint System: Phenolic Rust Proof Base Plus Polyurethane Top Coat
• Paint Color: Blue - Munsell 5PB 3/8
• Guide Bearings: 213TP - 286TP frames are Double Shielded
• Guide Bearings: 324TP - 5810P frames are Re-Greasable with Mobil Polyrex™ EM Grease
• Thrust Bearings: 213TP - 286TP frames are Re-Greasable Angular Contact with Mobil Polyrex™ EM Grease
• Thrust Bearings: 324TP - 5810P frames are Oil Lubricated Angular Contact with Site Glass
• Oil Requirements for 324TP-405TP - 145 to 175 S.S.U. @100°F
• Oil Requirements for 444TP-5810P - 300 S.S.U. @100°F
• Grounding Terminal Inside Main Box
• Stainless Steel Nameplate and Rodent Screens
• 12 Leads (PWS on 230V) on 213 - 405TP; 6 Leads on 444TP to 449TP; 5000 Frames and Above with Connection Studs
• Suitable for Inverter Use per NEMA MG-1.4.4.2, Part 31.10:1 Variable Torque with NRR. 10:1 C.T., 20:1 VT without NRR Using Braking in VFD
• Precautions should be taken to eliminate or reduce shaft currents that may be imposed on the motor by VFD as stated per NEMA MG-1 Part 31.

• • Three Phase, 60 Hz, 1.15 Service Factor (Continuous); 50 Hz, 1.0 Service Factor (Continuous)
  • CSA Certified for Class I, Div. 2, Groups B, C, D - Temp Code T3 Minimum
  • Class F Insulation
  • Class B Temperature Rise
  • NEMA Design B Torques
  • Cast Iron Frame, End Brackets, Fan Cover, Drip Cover and Main Conduit Box
  • Rolled Steel, Fan Cover, Drip Cover and Main Conduit Box
  • Grounding Terminal Inside Main Conduit Box
  • Oversized Main Conduit Box Rotatable in 90 Degree Increments - F1 Mounted
  • Designed for 40˚C Ambient Temperature
  • Designed for 3300 ft. Elevation
  • Bi-Directional Rotation
  • 1045 Carbon Steel Shaft
  • Aluminum Die Cast Squirrel Cage Rotor Construction
  • Paint System: Phenolic Rust Proof Base Plus Polyurethane Top Coat
  • Paint Color: Dark Gray - Munsell 7.5B 3.5/0.5
  • Guide Bearings: 250HP - 449HP Frames are Single Shielded
  • Thrust Bearings: 250HP - 449HP Frames are Re-Greasable Angular Contact with Mobil Polyrex™ EM
  • Automatic Grease Discharge Fittings on Regreasable Motors
  • Labyrinth Type Metal Flinger on Both Ends for Frames 320 HP & Large

r

• Cast Iron Inner and Outer Bearing Caps for Frames 280 & Larger
• Stainless Steel Nameplate
• New Dual Column Design Nameplate as Standard (60/50 Hz)
• Suitable for Inverter Duty (PWM - Pulse Width Modulation) per NEMA MG-1, Part 31
• Inverter Duty Speed Range: 20:1 Variable Torque, 10:1 Constant Torque
• 12 Leads
• Dust Flinger on Drive-End for F# 140 HP - 280 HP
• NEMA Type P Base

• Three Phase, 60 Hz, 1.15 Service Factor (Continuous); 50 Hz, 1.0 Service Factor (Continuous)
• CSA Certified for Class I, Div. 2, Groups B, C, D - Temp Code T3 Minimum
• Meets or Exceeds IEEE 841 Standards
• Extended Warranty - 60 Months from Date of Manufacture
• Class F Insulation
• Class B Temperature Rise
• NEMA Design B Torques as a Minimum; Various Ratings also Meet Design C
• Cast Iron Frame, End Brackets, Fan Cover, Drip Cover and Main Conduit Box
• Grounding Terminal Inside Main Conduit Box with additional Foot Grounding Provision
• Oversized Main Conduit Box Rotatable in 90 Degree Increments - F1 Mounted
• Designed for 50˚C Ambient Temperature
• Designed for 3300 ft. Elevation
• Bi-Directional Rotation
• 1045 Carbon Steel Shaft
• Aluminum Die Cast Squirrel Cage Rotor Construction
• Paint System: 2 Part Epoxy
• Paint Color: Blue - Munsell 5PB 3/8
• Guide Bearings: 250HP - 400HP Frames are Single Shielded
• Thrust Bearings: 250HP - 405HP Frames are Re-Greasable Angular Contact with Mobil PolyrexTM EM
• Automatic Grease Discharge Fittings
• Cast Iron Inner and Outer Bearing Caps for all frames
• VBXX INPRO™ Seals Installed on Both Ends
• Stainless Steel Nameplate and Hardware
• Stainless Steel Automatic Breather Drain (Located at both End Brackets for Vertical Mounts)
• New Dual Column Design Nameplate as Standard (60/50 Hz)
• Suitable for Inverter Use per NEMA MG-1.4.4.2, Part 31.
• Inverter Duty Speed Range: 20:1 Variable Torque, 10:1 Constant Torque
• Motors are U.L. Recognized, CSA Approved
• 3 Leads Only
• Vibration Not to Exceed 0.08 Inches Per Second
• Noise Level Not to Exceed 85 dB(A) at 1 Meter Unloaded
• NEMA Type P Base

• Three Phase, 60 Hz, 1.15 Service Factor (Continuous on Sine Wave Power)
• Inverter Duty (PWM) per NEMA® MG-1 Part 31 at 1.0 Service Factor
• New Dual Column (60/50 Hz) Design Nameplate as Standard; 50 Hz Data 190/380V at 1.0 S.F.
• Standard Features: Coupling w/ Gib Key, Ball Type NRR, Drip/Splash Cover, Space Heaters (120V)
• 5000 Frames and Above also include Mounting Provisions for bearing RTD's and Insulated Bearing Housing
• Optional Capability for 175% High Thrust Requirement for 444 - 449TP Frames
• Motor Design Suitable to handle 2 stacked bearings; Motors will ship with 1 bearing and 1 spacer as Standard
• Class F Insulation with Phenolic Alkyd Resin Varnish
• Class B Temperature Rise
• NEMA Design B Torques
• Oversized Main Conduit Box Rotatable in 90 Degree Increments - Fully Gasketed with NPT Threaded Entrance
• Cast Iron Conduit Box for F#449TP and Below; Steel Plate Conduit Box for F#5000
• Designed for 40˚C Ambient Temperature
• Designed for 3300 ft. Elevation
• Counterclockwise (CCW) Rotation; Viewed from Top
• Cast Iron Frame & End Brackets
• 1045 Hollow Carbon Steel Shaft
• Aluminum Die Cast Squirrel Cage Rotor Construction for F#449TP and Below
• Squirrel Cage Copper or Copper Alloy Bar Rotor Construction for F#5000
• Paint System: Phenolic Rust Proof Base Plus Polyurethane Top Coat
• Paint Color for AMRC (MAX-VH™): Dark Gray - Munsell 7.5B 3.5/0.5
• Paint Color for AMRCNH (MAX-VHP™): Blue - Munsell 5PB 3/8
• Guide Bearings: 213 - 286TP frames are Grease Pre-packed Double Shielded Bearings (MULTEMP SRL) 324TP - 5009P frames are Re-Greasable (Mobil Polyrex EM)
• Thrust Bearings: 213 - 286TP frames are Re-Greasable Angular Contact (Mobil Polyrex EM); 324 - 449TP frames are Oil Lubricated Angular Contact; F#5000 and Above with Spherical Roller
• Oil Sight Glass for 324TP Frames and Above
• Oil Requirements: 300 S.S.U. @100°F
• Grounding Terminal Inside Main Box
• Stainless Steel Nameplate and Rodent Screens
• 12 Leads (PWS on 230V) on 213 - 405TP3; Wye/Delta on 230V or 460V
• 6 Leads on 444TP to 449TP; 5000 Frames and Above with Connection Studs
• Suitable for Inverter Use per NEMA MG-1.4.4.2, Part 31. 10:1 Variable Torque with NRR. 10:1 C.T., 20:1 VT without NRR Using Braking in VFD
• Precautions should be taken to eliminate or reduce shaft currents that may be imposed on the motor by VFD at stated per NEMA MG-1, part 31 for AMRCNH and Part 30 for AMRC.