What this worksheet captures
This worksheet is built to capture the field details that usually decide whether VFD replacement data collection can move into a quote, replacement, or engineering review.
It is meant to keep the intake practical, consistent, and easier to hand off between maintenance, engineering, and purchasing.
- motor nameplate
- existing drive model
- control signals
- load profile
- mounting space
When to use it
Use it when the field information is incomplete, when multiple people are touching the job, or when the replacement path depends on details that are easy to miss over email or phone.
Worksheet
Fill this in on-screen or print the page and carry it into the field so the same core details make it back to engineering, sourcing, or quote review.
| Field | Value | Notes |
|---|---|---|
Motor nameplate Find the equipment nameplate or tag on the installed device and copy the values exactly as shown. |
Volts
Amps
HP
RPM
Phase
Hz
|
|
Existing drive model Read the model from the installed device label or nameplate and include any prefixes, suffixes, or revision marks. |
Manufacturer / Family
Catalog / Model
Series / Rev
|
|
Control signals Read these from the terminal strip, wiring diagram, PLC I/O list, or labeled field wires and note how the device is actually commanded. |
Start / Stop
Speed / Command
Feedback / Fault
|
|
Load profile Describe what the machine or circuit is doing in normal operation so the replacement is judged against the real job. |
Load Type
Starts / Hr
Speed Range
Duty Notes
|
|
Mounting space Measure the available space or mounting pattern at the installed equipment so the replacement still fits physically. |
Width
Height
Length
Unit
|
How to use it on site
Work from the installed equipment first, then collect the ratings, environment, fit notes, and related components that change the actual buying decision.
| Item | What it means in practice | Why buyers care |
|---|---|---|
| Core role | Control motor speed and torque electronically | This separates it from a soft starter or contactor. |
| What engineers compare first | current rating, overload capability, control features, and enclosure environment | Those items determine whether the drive fits the process. |
| Typical supporting parts | line reactors, filters, braking hardware, disconnects, and control I/O | Drive systems are never just the drive nameplate. |
| Common confusion | Treating it like a reduced-voltage starter | A drive is chosen for ongoing control, not just a gentler start. |
What to verify before sending it on
A worksheet is most useful when the captured values are checked for completeness before they move into sourcing or quote prep.
Important verification notes
Use the worksheet to structure the job, then confirm the final release path against the exact product-family data and installed conditions.