F3 Drop In Replacement Motors for Alstom and GEC Alsthom Installations

Engineered to match critical interfaces and minimise downtime

CHASE International supplies replacement F3 induction motors engineered as true drop in replacements where the application allows. The objective is to reduce risk, avoid unnecessary site modifications, and complete the change out efficiently.

F3 is a legacy series reference associated with heritage brands including GEC Alsthom and Alstom (now part of GE). This reference is used only to identify compatibility with installed equipment.

F3 drop in replacement motor

Heritage references

Where applicable, heritage reference support is provided by Quartzelec

Chase International Limited is an independent supplier. OEM names and series references are used only to identify compatibility with installed equipment.

F3 drop in replacement motors

What we mean by “drop in”

A drop in replacement is engineered to suit the existing installation so that replacement can be completed with minimal disruption.

Typical focus areas include:

  • Mounting and footprint
  • Shaft and coupling arrangement
  • Terminal box orientation and cable entry
  • Instrumentation and accessories
  • Cooling method and protection requirements
  • Electrical performance aligned to the duty

If a true drop in cannot be achieved, we advise early and propose the cleanest alternative.

How we reduce replacement risk

F3 drop in replacement motor

Technical capture

  • Nameplate confirmation and site photos
  • Installed interface review
  • Duty confirmation including starting method and thermal limits

Engineering and documentation

  • Drawings for approval
  • Technical data sheets and performance information where required
  • Routine test results
  • Installation and commissioning notes

Delivery support

  • Clear document pack for approvals and handover
  • Practical support to minimise downtime during the change out

Typical reference statement

Chase has supplied multiple HV and MV induction motor replacements, including repeat orders, into a large Asia based utility fleet.

Typically, units are 3.3, 6.6 or 11 kV machines in the 250 kW to 10 MW range.
Supply includes drawings for approval, technical data sheets and performance curves, routine test results, and installation manuals to support an efficient change out.

What we need from you to quote quickly:

  • Nameplate photo and motor tag reference
  • Basic duty details: kW, kV, poles, speed, starting method
  • Photos of terminal box, mounting, coupling end and non drive end
  • Any drawings or data sheets available
  • Required delivery date and installation timing

Supported F3 frame sizes and configurations

Replacements are supplied independently of the OEM, giving operators more flexibility on lead time and cost.
Coverage is broader than the examples shown. If your frame or rating is not listed, send the nameplate and we will confirm compatibility.

Please expand the list below and use CTRL + F to search for a specific frame type.


F3 compatibility examples (click to expand)
  • F3GXC400G2GH5
    F31NXC400G/4GH/5
    F31PXAN400GR/2GH/5
    F31PXC450L2G
    F31PXC500L/2GH/5
    F31PXCN450L/2GH/5
    F31RXA400G/4GH/5
    F31RXA400G/6GH/5 
    F31RXA400L/2GH/5 
    F31RXC355L/6GH/5 
    F31RXC400L/4GH/5 
    F31RXC450K/4GH/5 
    F31RXC450L/4GV/5
    F31RXC500G/8GV/5
    F31RXC500K/2GH/5 
    F31RXC500K/6GH/5
    F31RXC500L/6GH/5 
    FL1XC 315
  • F32HTC450J   
    F32HXC500L/2CH/5 
    F32NXC500L/10GV/5 
    F32NXC500L/6GH/5 
    F32RTC355G
    F32RXC355L/2GH/5
    F32RXC355L/4GH/5 
    F32RXC355L2G
    F32RXC400G/4GH/5
    F32RXC400G4G 
    F32RXC450K/2GH/5
    F32RXC450L/2CH/5
    F32RXC450L/8GV/5 
    F32RXC500L/8GV/5 
    F32RXCN500L
    F33HXC400L/2CH/5
    F33HXC450L/2GH/5
    FL1XC315J4G



  • F33RXC400L/4GH/5 
    F33RXC450L/8GH/5
    F3HXC450L/2CH/5
    F3RXA355J
    F3RXA400L4GB3
    F3RXA400L6G
    F3RXA400L6GB3
    F3RXA450G8G/V1  
    F3RXA450J6GB3
    F3RXC400
    F3RXC400J
    F3RXC400J4G 
    F3RXC400L6G 
    F3RXC450 L/8GV1
    F3RXC450J      
    F3RXC500
    F3RXC500L4G
    F3RXC560

Why Choose Chase International?

  • Drop in replacements engineered to suit installed interfaces
  • Practical approach focused on outage risk reduction
  • Documentation pack to support approvals and commissioning
  • Competitive alternative to OEM supply

Send a nameplate photo and we will come back with the best replacement option and a quotation

Chase International Limited is an independent supplier. OEM names and series references are used only to identify compatibility with installed equipment.