Every motor end-user hits a point where they need to cross reference a motor to a newer replacement. Whether it’s because the previous model is pricier, out of stock, or no longer being manufactured, knowing how to identify a proper cross reference replacement is vital to keeping your supply chain consistent.
What is an electric motor cross reference?
Motor cross-referencing involves a series of systematic steps to identify an equivalent electric motor to substitute an incumbent. Since motors come in different ratings and shapes with each one having unique performance characteristics, it’s important to be able to identify a suitable replacement that won’t disturb operations.
Here, you’ll be able to identify “must-have” parameters as well as specifications that have more flexibility when performing a cross reference.
How to Cross Reference
We’ll take you step-by-step through the process you should follow to find your needed electric motor replacement.
Gather Nameplate Data of the Motor to be Replaced
First and foremost, start with the nameplate of your existing motor. This will serve as your guide to the specifications you need to match and identify in a new motor.
Your motor nameplate will be your best source for the following features:
Part/Catalog Number
Power Size
Voltage
Phase
Speed
Frame size
Base Type
Flange Type
Application Details
Full Load Amps
Service Factor
Efficiency
Enclosure Classification
Protector Spec
Identify Your “Must-Have” Parameters
While finding a like-for-like replacement is ideal, that’s not always an easy option. When matching up motors, keep an eye out for these must have specifications:
HP – Matched or a higher rating
Service factor – Matched or a higher service factor, unless going to a higher HP rating motor
Pole – Matched
Voltage – Matched. You can point a Single voltage to Dual voltage, but not the other way around
Flange – Non-flange motors can be crossed to Flanged motor, but not vice versa
Base – Matched
Frame size – Matched base frame and suffix
Frequency – Matched or if single frequency, the motor can be replaced by 50 / 60 Hz designs that contain the original frequency
Speed – Matched
Rotation – Matched unless crossing to a reversible motor.
Thermal protector – You can point a non-protected to a protected motor, but not vice versa
Enclosure:
ODP / DP Can Use TEFC, TENV
OPEN Can Use ODP / DP, TEFC, TENV
TEFC Can Use TENV
TENV Can Use TEFC
TEAO Can Use TENV, TEFC
Explosion Proof Must Match
Contact factory when using an ODP, TEFC, or TENV motor, having a Protector, in an "Air-Over" application
Optional Parameter to Consider
These specifications are important, but not necessary to meet the operational replacement of your motor:
Agency Certifications – Should match local requirements
Efficiency –Matched or higher efficiency
Shaft – Recommended but not required
Bearing type – Not required
Conduit Box location – Not required
Cross referencing electric motors is an exercise in understanding your motor and what exactly you need it to do to keep your production line going. Being able to identify your high priority parameters is vital to ensuring safety, uptime, and motor longevity.
RegalRexnord.com’s search features make it easy to find the motors you need with our cross reference database. Looking to learn more about a specific motor? Contact our sales team and product experts for more information!
Talk to one of our expert sales professionals about how our solutions can efficiently power your business.
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