Delta · VFD-EL
VFD015EL21W-1 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
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 |
| Control method |
V/f, sensorless vector (IEC 61800-2) |
| Overload capacity |
150% for 60 s |
| 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 VFD015EL21W-1 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=VFD015EL21W-1. 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.
Model comparison in the same family
| Delta VFD-EL variants |
| Catalog number |
Overload capacity |
Rated operational voltage |
Frequency |
|
VFD015EL21W-1 (this page) |
150% for 60 s |
3-phase 400 V AC |
50/60 Hz |
VFD015EL21W
| 3-phase 400 V AC |
50/60 Hz |
VFD015EL21A
| 3-phase 400 V AC |
50/60 Hz |
VFD015EL23A
| 3-phase 400 V AC |
50/60 Hz |
Before selecting an alternative, confirm its dimensions, terminals and installation requirements in the manufacturer documentation.
Where it sits in the control system
The VFD015EL21W-1 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 VFD015EL21W-1
Delta VFD015EL21W-1 — 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 VFD015EL21W-1; verify the catalog number against your bill of materials before requesting a quotation.
- Overload capacity: 150% for 60 s — Match it to the existing panel and upstream protection.
- Mounting: Cabinet / DIN rail — Record it with the other nameplate data when sourcing a replacement.
- Enclosure rating: IP20 (IEC 60529) — Confirm the revision of the installed unit before a like-for-like replacement.
- Certifications: CE, UL, cULus — Use it as the reference when cross-checking a current-production equivalent.
For a discontinued unit, match function and electrical ratings rather than the label alone.
Common questions about VFD015EL21W-1
Q.Which official Delta document defines VFD015EL21W-1?
The official Delta download-centre catalogue search for this model lists VFD015EL21W-1 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=VFD015EL21W-1. Use that document as the authority for ratings and installation conditions before ordering.
Q.Which value is published under control method for catalog number VFD015EL21W-1?
For VFD015EL21W-1, control method is given as V/f, sensorless vector (IEC 61800-2). Compare it with the nameplate of the installed unit before ordering.
Q.Before ordering VFD015EL21W-1, which operating temperature entry should be checked?
The operating temperature entry quoted above is 0...+40 °C (IEC 60068-2-1). Confirm this figure against the unit currently in the panel.
Q.Where can I find the overload capacity data for VFD015EL21W-1?
It is listed in the specification table for Delta VFD015EL21W-1 as 150% for 60 s. Use the value as the reference when sourcing a current-production equivalent.
Q.How do I confirm compatibility of VFD015EL21W-1 before ordering?
Match the catalog number VFD015EL21W-1 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.Can the VFD015EL21W-1 replace the unit currently installed in my panel?
Compare catalog number VFD015EL21W-1 and the ratings above with the nameplate of the installed device. A current-production equivalent is selected by function and electrical rating, not by the label alone.