Delta · VFD-E
VFD015E21A is a Delta VFD Drive. It is used in pump sets, conveyor belts, fan and compressor drives where the installed unit is matched to the original catalog number and a compact, documented part is required.
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Rated operational voltage3-phase 400 V AC
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Overload capacity150% for 60 s
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Enclosure ratingIP20 (IEC 60529)
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Frequency50/60 Hz (IEC 61800-2)
Specifications
| Electrical |
| Rated operational voltage |
3-phase 400 V AC |
| Supply voltage |
1-phase 200...240 V / 3-phase 380...480 V AC |
| Frequency |
50/60 Hz (IEC 61800-2) |
| Control method |
V/f, sensorless vector (IEC 61800-2) |
| Overload capacity |
150% for 60 s |
| Rated speed |
One high speed pulse input terminal MI7 built-in with maximum speed up to 33kHz |
| Mechanical |
| Mounting |
Cabinet / DIN rail |
| Enclosure rating |
IP20 (IEC 60529) |
| Environment and compliance |
| Operating temperature |
0...+40 °C (IEC 60068-2-1) |
| Certifications |
CE, UL, cULus |
Product type and series follow the official Delta download-centre catalogue search for this model which lists VFD015E21A under the Delta product line; the product type published for this catalog number is "VFD Drive". Source: https://downloadcenter.deltaww.com/en-US/DownloadCenter?q=VFD015E21A. Numeric ratings in the table above are the values carried on this page and must be confirmed against the original Delta manufacturer datasheet before they are treated as this catalog number's ratings; they are not estimated here.
Lifecycle: discontinued by the manufacturer. Current-production replacement: MS300. Cross-reference by function and ratings, not by label alone.
Model comparison in the same family
| Delta VFD-E variants |
| Catalog number |
Overload capacity |
Rated operational voltage |
Frequency |
|
VFD015E21A (this page) |
150% for 60 s |
3-phase 400 V AC |
50/60 Hz (IEC 61800-2) |
VFD015E23A
| 3-phase 400 V AC |
50/60 Hz (IEC 61800-2) |
VFD015E43A
| 3-phase 400 V AC |
50/60 Hz (IEC 61800-2) |
VFD015E43T
| 3-phase 400 V AC |
50/60 Hz (IEC 61800-2) |
Before selecting an alternative, confirm its dimensions, terminals and installation requirements in the manufacturer documentation.
Where it sits in the control system
The VFD015E21A is the drive element in a Delta motor installation. It supplies the motor with controlled power and carries the output frequency and overload behaviour, so the motor and the supply conductor are sized to the ratings stated in the manufacturer documentation, not to a generic assumption.
Typical installations place it in pump sets, conveyor belts, fan and compressor drives, where the unit is matched to the original catalog number and the enclosure provides Cabinet / DIN rail support. Record the catalog number and revision from the nameplate of the installed unit before specifying a like-for-like spare.
Selection notes for Delta VFD015E21A
Delta VFD015E21A — Variable frequency drive for motor speed and torque control in pumps, fans, conveyors and general industrial machinery. The figures below are taken from the specification table on this page for catalog number VFD015E21A; size the surrounding wiring and upstream protection to these published ratings rather than to a generic assumption.
- Certifications: CE, UL, cULus — Confirm the revision of the installed unit before a like-for-like replacement.
- Control method: V/f, sensorless vector (IEC 61800-2) — Use it as the reference when cross-checking a current-production equivalent.
- Mounting: Cabinet / DIN rail — Verify it in the project documentation before confirming the order.
- Operating temperature: 0...+40 °C (IEC 60068-2-1) — Check this value against the nameplate of the installed unit before ordering.
For a discontinued unit, match function and electrical ratings rather than the label alone.
Common questions about VFD015E21A
Q.Which official Delta document defines VFD015E21A?
The official Delta download-centre catalogue search for this model lists VFD015E21A under the Delta product line, and the product type published for this catalog number is "VFD Drive". The document and its official catalogue record are publicly retrievable at https://downloadcenter.deltaww.com/en-US/DownloadCenter?q=VFD015E21A. Use that document as the authority for ratings and installation conditions before ordering.
Q.Which value is published under overload capacity for catalog number VFD015E21A?
For VFD015E21A, overload capacity is given as 150% for 60 s. Confirm this figure against the unit currently in the panel.
Q.Before ordering VFD015E21A, which mounting entry should be checked?
The mounting entry quoted above is Cabinet / DIN rail. Use the value as the reference when sourcing a current-production equivalent.
Q.Where can I find the rated speed data for VFD015E21A?
It is listed in the specification table for Delta VFD015E21A as One high speed pulse input terminal MI7 built-in with maximum speed up to 33kHz. Check the revision of the installed unit if the catalog number has been superseded.
Q.How do I confirm compatibility of VFD015E21A before ordering?
Match the catalog number VFD015E21A and the specification values listed above against the installed unit, then confirm the firmware or hardware revision where a revision-sensitive part is involved.
Q.What should I include in an enquiry for VFD015E21A?
Send the full catalog number VFD015E21A, the required quantity and a photo of the nameplate. Stock, lead time and the applicable compliance documents can then be confirmed for Delta VFD015E21A.